Hach 621-691-086 Instrument Manual

Brand: Hach

Model: 621-691-086

Type: Instrument Manual

This manual is also suitable for

9186

Catalog Number 621=691=086

9186 Oxygen Scavenger Analyzer

INSTRUMENT MANUAL

03/04 1ed

eac/dp 03/04 1ed

Table of Contents

Section 1 Safety Precautions ....................................................................................................................................... 4

Use of Hazard Information............................................................................................................................................... 4

Precautionary Labels....................................................................................................................................................... 4

Section 2 Specifications ............................................................................................................................................... 5

Section 3 General Description ..................................................................................................................................... 6

3.1 Unpacking.................................................................................................................................................................. 6

3.2 Overview.................................................................................................................................................................... 6

3.3 Principle of Operation ................................................................................................................................................ 6

Section 4 Installation................................................................................................................................................... 10

4.1 Environmental Considerations................................................................................................................................. 10

4.2 General Installation Considerations......................................................................................................................... 10

4.3 Mounting the Instrument.......................................................................................................................................... 10

4.3.1 Attaching the Conditioning Bottle ................................................................................................................... 10

4.3.2 Installing the Reference Electrode ................................................................................................................. 12

4.3.3 Installing the In-line Filter ............................................................................................................................... 13

4.3.4 Connecting the Measuring Cell to the Transmitter ......................................................................................... 13

4.3.5 Choosing the Sample Line Location .............................................................................................................. 13

4.3.6 Connecting the Inlet Tubing............................................................................................................................ 13

4.3.7 Connecting the Outlet Tubing......................................................................................................................... 13

4.4 Electrical Connections ............................................................................................................................................. 15

4.4.1 Power Connections ........................................................................................................................................ 15

4.4.2 Electrostatic Discharge (ESD) Considerations............................................................................................... 16

4.4.3 Wiring the Instrument for Power..................................................................................................................... 17

4.4.4 Alarm Connections......................................................................................................................................... 18

4.5 Terminal Strip and Wiring Connections Descriptions .............................................................................................. 21

4.6 Using the Flow Meter............................................................................................................................................... 22

Section 5 Programming the Instrument .................................................................................................................... 23

5.1 Programming Overview ........................................................................................................................................... 23

5.2 Setting the Alarms ................................................................................................................................................... 26

5.2.1 Threshold Alarms........................................................................................................................................... 26

5.2.2 System Alarms............................................................................................................................................... 26

5.3 Temperature Compensation .................................................................................................................................... 27

5.3.1 Automatic Temperature Compensation.......................................................................................................... 28

5.3.2 Manual Temperature Compensation .............................................................................................................. 28

5.4 Programming mA Outputs ....................................................................................................................................... 28

5.5 Setting Up the Display ............................................................................................................................................. 29

5.6 Setting the Numeric Password (Code) .................................................................................................................... 30

5.7 Adjusting the mA Settings ....................................................................................................................................... 30

5.8 Setting Up the RS485 Outputs ................................................................................................................................ 30

5.9 Calculating the Average Concentration ................................................................................................................... 31

5.10 Identifying the Software Version ............................................................................................................................ 31

5.11 Loading Default Values.......................................................................................................................................... 31

5.12 Setting the Frequency of the Power Source .......................................................................................................... 32

5.13 Using the Maintenance Function ........................................................................................................................... 32

Section 6 Calibrating the Sensors ............................................................................................................................. 33

6.1 Calibrating the Temperature Sensor........................................................................................................................ 33

6.1.1 Temperature Conversion Table ...................................................................................................................... 33

Table of Contents

6.4.4 Viewing Calibration History ............................................................................................................................ 36

6.4.5 Calibration-related Messages ........................................................................................................................ 36

Section 7 Maintenance................................................................................................................................................ 37

7.1 Scheduled Maintenance .......................................................................................................................................... 37

7.1.1 Refilling the pH Conditioner ........................................................................................................................... 37

7.1.2 Replacing the Tubing...................................................................................................................................... 37

7.1.3 Replacing the In-line Filter ............................................................................................................................. 37

7.2 Unscheduled Maintenance ...................................................................................................................................... 37

7.2.1 Replacing the Fuse ........................................................................................................................................ 37

7.2.2 Cleaning the Instrument................................................................................................................................. 38

7.2.3 Cleaning the Measuring Block ....................................................................................................................... 38

Section 8 Modbus Communication............................................................................................................................ 39

8.1 Introduction.............................................................................................................................................................. 39

8.2 Modbus Settings...................................................................................................................................................... 39

8.2.1 N .................................................................................................................................................................... 39

8.2.2 Baud............................................................................................................................................................... 39

8.2.3 Parity .............................................................................................................................................................. 39

8.2.4 Stop Bit .......................................................................................................................................................... 39

8.2.5 Swap Word..................................................................................................................................................... 39

8.3 Modbus Function Codes.......................................................................................................................................... 39

8.3.1 Read Input Registers—Function Code 03 ..................................................................................................... 40

8.4 Write Input Register—Function Code 06................................................................................................................. 40

8.4.1 Write Multiple Input Registers—Function Code 16 (10 Hex) ......................................................................... 41

8.5.2 Units Definition ............................................................................................................................................... 45

8.6 Network Connections .............................................................................................................................................. 46

8.6.1 RS485 Connections ....................................................................................................................................... 46

8.6.2 Terminator ...................................................................................................................................................... 46

Section 9 Troubleshooting.......................................................................................................................................... 47

9.1 Troubleshooting Error Messages ............................................................................................................................. 47

9.2 Detecting Electrical Faults ....................................................................................................................................... 48

Section 10 Parts and Accessories ............................................................................................................................. 49

Section 11 How to Order............................................................................................................................................. 50

Section 12 Repair Service........................................................................................................................................... 51

Section 13 Warranty .................................................................................................................................................... 52

Section 1 Safety Precautions

Please read this entire manual before unpacking, setting up, or operating this instrument.

Pay particular attention to all danger and caution statements. Failure to do so could result in serious injury to the

operator or damage to the equipment.

Do not use or install this equipment in any manner other than that which is specified in this manual.

Use of Hazard Information

If multiple hazards exist, this manual will use the signal word (Danger, Caution, Note) corresponding to the

greatest hazard.

DANGER

Indicates a potentially or imminently hazardous situation which, if not avoided, could result in death or

serious injury.

CAUTION

Indicates a potentially hazardous situation that may result in minor or moderate injury.

Note: Information that requires special emphasis.

Precautionary Labels

Read all labels and tags attached to the instrument. Personal injury or damage to the instrument could occur if

not observed.

This symbol, if noted on the instrument, references the instruction manual for operation

and/or safety information.

This symbol, when noted on a product enclosure or barrier, indicates that a risk of electrical shock and/or

electrocution exists and indicates that only individuals qualified to work with hazardous voltages should

open the enclosure or remove the barrier.

This symbol, when noted on the product, identifies the location of a fuse or current limiting device.

This symbol, when noted on the product, indicates that the marked item can be hot and should not be

touched without care.

This symbol, when noted on the product, indicates the presence of devices sensitive to Electro-static

Discharge and indicates that care must be taken to prevent damage to them.

This symbol, when noted on the product, identifies a risk of chemical harm and indicates that only

individuals qualified and trained to work with chemicals should handle chemicals or perform maintenance

on chemical delivery systems associated with the equipment.

This symbol, if noted on the product, indicates the need for protective eye wear.

This symbol, when noted on the product, identifies the location of the connection for Protective Earth

(ground).

Section 2 Specifications

Specifications are subject to change without notice.

General

Controller Dimensions 14.4 cm x 14.4 cm x 11.9 cm (5.6 in. x 5.6 in. x 4.6 in.) (W x H x D)

Mounting Pre-mounted on panel

Instrument Shipping Weight 4.1 kg (9 lb)

Sample Requirements

Sample Flow Rate to Analyzer 166 to 250 mL/min (10 to 15 L/h) recommended

Inlet Pressure to Instrument 0.5–6 bar (7–89 psi)

Sample Temperature Range 5–45 °C (41–113 °F)

Sample Inlet Tubing: at instrument ¼ in. OD

Drain Fitting

/16 in. OD

Application Sample Industrial and boiler waters

Electrical

Power Requirements 100–240 V ac ±10%; 90 VA, 50/60 Hz, 2 Amp fuse

Power Connection

Connection made to a three-position terminal block through one of four ½-inch conduit holes

in the case. Wire size: 12–18 AWG.

Installation Category II

Alarm Contact Rating

Four relays (SPST) each rated at 3 A (resistive), 240 V ac maximum. The contacts are

unpowered.

Use either high voltage (greater than 30 V RMS and 42.2 V PEAK or 60 V dc) or low voltage

(less than 30 V RMS and 42.2 V PEAK or 60 V dc). Do not use a combination of high and low

voltage.

Alarm Connection

Connection made by four removable two-position terminals through one of four

½-inch conduit holes in the case. Wire size: 12–18 AWG.

Analog Output Two isolated outputs, 0/4–20 mA. Maximum impedance 800 ohm.

Recorder Output Connections

Connection made to a terminal block through one of four ½-inch conduit holes in the case.

Wire size: 12–18 AWG.

Digital Output RS485

Performance

Measurement Range 0–500 ppb dissolved N

, 0–100 ppb dissolved carbohydrazide

Repeatability ± 2% of measurement or 1 ppb, whichever is greater

Detection Limit Drift is negligible; detection limit is 1ppb

Response Time @ 90% < 60 seconds

Calibration

Electrical zero, set automatically or chemical zero with hydrazine-free water. Calibration of the

slope compared with a laboratory instrument.

Analog Outputs Two 4–20 mA/0–20 mA, linear or bilinear

Environmental

Enclosure IP65/NEMA 4x

Storage Temperature Range –20 to 60 °C (–4 to 140 °F)

Operating Temperature Range 5–45 °C (41–113 °F)

Relative Humidity 10 to 90% non-condensing

Compliance

UL listed (E226594) to UL3101-1& CSA C22.2 No. 1010.1

Section 3 General Description

3.1 Unpacking

Remove the analyzer from its shipping carton and inspect it for any damage. If

damage is evident or the shipment is incomplete, please contact the Customer

Service Department, Hach Company, Loveland, Colorado for instructions. The

toll-free number is 800-227-4224.

3.2 Overview

The 9186 Oxygen Scavenger Analyzer (Figure 1 and Figure 2) is an on-line,

single-channel industrial analyzer that measures hydrazine or carbohydrazide in

boilers and other applications that require monitoring of oxygen scavengers at the

ppb and ppm levels.

This instrument uses a 3-electrode amperometric method to

measure concentration.

3.3 Principle of Operation

The 9186 Analyzer continuously measures the amount of oxygen scavengers,

dissolved hydrazine, and carbohydrazide in water. The measuring principle is

based on the electrochemical method of 3-electrode amperometry.

A polarization voltage (+480 mV) is applied between a platinum anode (working

electrode) and a stainless steel cathode (counter-electrode). The oxygen

scavenger is oxidized at the surface of the working electrode and the resulting

current is directly proportional to the oxygen scavenger concentration in the range

of 0 to 500 ppb N

(Figure 3).

The reaction is enhanced in an alkaline environment, the sample is conditioned

before it enters the measuring cell. The sample is conditioned to pH ≥ 10.2 by

adding diethylamine, monoethylamine, ammonia, or diisopropylamine through a

Venturi tube. A sensor integrated to the measuring cell provides temperature

compensation.

The chemical reaction is as follows:

The anode-cathode potential is kept constant with respect to a third electrode

(reference electrode, Ag/AgCl). This avoids interference effects resulting from

variations in water composition that appear when using the 2-electrode system.

At 480 mV, the cell current is linearly proportional to the hydrazine concentration

(Figure 4).

4OH

–

+ N

O4e

–

++→

General Description

Figure 1 Front View

1. Analyzer (panel) 6. Flow Meter (Cat. No. 694=000=001)

2. Tra nsm itt er 7. Measuring Cell (Cat. No. 09186=C=0100)

3. Reference Electrode (Cat. No. 368429,00000) 8. Venturi Block (Cat. No. 09186=C=0110)

4. Counter Electrode

9. J-shaped piece of Tubing (Cat. No. 09186=A=0200)

5. Working Cell (Cat. No. 09186=A=0300) and Temperature

Electrode

10. Conditioning Bottle

23.2 °C

Display 2

ClO

ppm

0.065

l/h

WATER

9100

Esc Enter

on off

zero

min

General Description

Figure 2 Back View

1. Analyzer (panel) 6. Flow Regulator

2. Transmitter 7. Sample Inlet Connection

3. AC Power Cord 8. Drain Connection (Cat. No. 510100,01610) (must be a gravity drain)

4. Sample line from flow controller to measuring cell 9. Flow Meter

5. In-Line Filter (Cat. No. 363877,06000)

23.2 °C

Display 2

ClO

ppm

0.065

9100

Esc

Hach Company

5600 Lindberg Drive

P.O.Box 389

Loveland,CO 80539

U.S.A.

Type:

Model:

Serial No.:

Made in the E.E.C.

ETL LISTED

UL STD 1262

H0492805390

CERTIFIED

CSA STD C22.2 NO.142

General Description

Figure 3 Hydrazine Potential Intensity Curve

Figure 4 Current vs. Hydrazine Concentration

–20

100

120

140

160

180

200

220

360 ppb

180 ppb 270 ppb90 ppb0 ppb

0.00

0 204060

ppb O2Red

80 100 120 140 160 180 200

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

100.00

Section 4 Installation

DANGER

This instrument should be installed by qualified technical personnel to ensure

adherence to all applicable electrical and plumbing codes.

4.1 Environmental Considerations

The instrument controller is designed for IP65, indoor/outdoor installation with an

ambient temperature between 5 to 45 °C (41 to 113 °F). Do not mount the

instrument in direct sunlight; shield from dripping water.

4.2 General Installation Considerations

Important Note: The gravity drain forces the fumes from the conditioning solution into the

air. Failure to provide a gravity drain can create a health hazard.

• Place the analyzer in an accessible location.

• Make the sample supply line as short as possible.

• Ensure that there is no air intrusion into the sample supply line.

• There must be a gravity drain.

4.3 Mounting the Instrument

DANGER

This analyzer is intended to be

used for water samples only.

Dimensions are given in millimeters and inches (see Figure 5 on page 11).

4.3.1 Attaching the Conditioning Bottle

CAUTION

To familiarize yourself with

handling precautions, dangers

and emergency procedures,

always review the Material Safety

Data Sheets prior to handling

containers, reservoirs, and

delivery systems that contain

chemical reagents and standards.

Protective eye wear is always

recommended when contact with

chemicals is possible.

1. Fill the Conditioning bottle with diisopropylamine (Cat. No. 2834453).

Note: The bottle that the DIPA comes in can be directly connected to the diffuser cap,

therefore decanting may not be necessary.

2. Insert the diffuser tube into the bottle and screw the bottle cap onto the bottle.

3. Place the Conditioning bottle into the basket as shown in Figure 8 on page 14.

4. Connect one end of the J-shaped ¼ in. tubing to the bottle cap. Connect the

other end to the Measuring Cell as shown in Figure 8 on page 14.

Note: Prior to adding conditioner, it is important to ensure a gravity drain is installed to

prevent back pressure that would cause the creation of amine fumes in the area.

Note: The reagent will last for 1–3 months. Make sure that the reagent (Monoethylamine,

diethylamine, or ammonia) levels remain above the indicator line shown on the

mounting panel. Other amines require periodic pH check to determine if 10.2 or higher

is maintained.

Installation

Figure 5 Panel Dimensions

23.2 °C

Display 2

ClO

ppm

0.065

l/h

WATER

9100

Esc Enter

on off

zero

min

787.0 mm (30.98 inches)

270.0 mm

(10.62 inches)

8.89 mm thru

( 0.35 inches)

4 holes

15.0 mm

(0.60 inches)

Typical

228.0 mm (8.97 inches)

117.0 mm (4.60 inches)

3.17 mm (0.125 inches)

reference only

15.0 mm (0.60 inches)

Typical

300.0 mm

(11.81 inches)

817.1 mm (32.17 inches)

Installation

4.3.2 Installing the Reference Electrode

1. Place the seven small white Teflon

®*

beads through the hole at the top of the

measuring cell as shown in Figure 6. The beads provide better mixing and

self-cleaning.

2. Remove the reference electrode from its packaging.

3. Remove the red cap from the electrode.

4. Connect the male end of the electrode to the female end of the red connector

on the measuring cell.

5. Pull the electrode from the electrode storage bottle.

6. Screw the electrode into the hole at the top of the measuring cell.

Note: Replace the reference electrode yearly. See Section 7 on page 37.

Figure 6 Installing the Teflon Beads

*Teflon is a registered trademark of Dupont Corporation.

1. Reference Electrode (Cat. No. 368429,00000) 3. Teflon Beads (Cat. No. 588801,75008)

2. Reference Electrode Connector (Cat. No. 09186=A=0500) 4. Measuring Cell (Cat. No. 09186=A=0100)

Installation

4.3.3 Installing the In-line Filter

Note: Rinse out sample system

before startup to prevent “crud

bursts” from clogging new filters.

1. On the back of the panel, connect ¼ in. tubing to the elbow fitting on the top of

the measuring cell (see Figure 8).

2. Connect the other end of the tubing to one end of the filter. Make sure that the

filter is oriented with the arrow pointing up.

3. Connect another length of ¼ in. tubing to the bottom of the filter. Connect the

other end of the tubing to the elbow fitting on the right side of the pressure

regulator.

4.3.4 Connecting the Measuring Cell to the Transmitter

Insert the female end of the sensor connector into the 4-pronged connector at the

bottom of the measuring cell.

4.3.5 Choosing the Sample Line Location

Note: Erratic readings will occur if a

sample is drawn from a location that

is too close to points of chemical

additions to the process stream, if

mixing is inadequate, or if the

chemical reaction is incomplete.

Selecting a good, representative sampling point is important for optimum

performance of your instrument. The sample analyzed must be representative of

the condition of the entire system.

Install sample line taps into the side of larger process pipes to minimize the

chance of ingesting sediment from the pipe line bottom or air bubbles from the top.

A tap projecting into the horizontal center of the pipe is ideal.

Figure 7 Sample Line Location

4.3.6 Connecting the Inlet Tubing

1. Choose the sample line location as described above.

2. Connect the ¼ in. O.D. tubing to the lower left elbow fitting on the Pressure

Regulator as shown in Figure 8.

4.3.7 Connecting the Outlet Tubing

On the back of the panel, connect the

/8-inch outlet tubing to the barbed fitting on

the back of the measuring cell. The tubing must not exceed 4 ft and it must drain

straight down.

Poor

Sediment (Typical)

Air (Typical)

Poor

Good Best

Installation

Figure 8 Connecting the Outlet Tubing

1. Analyzer (panel) 9. Venturi Block

2. Transmitter 10. J-shaped tubing

3. Reference Electrode 11. Bottle Cap with diffuser

4. Counter Electrode 12. Conditioning Bottle in the basket

5. Working Cell and Temperature Electrode 13. In-Line Filter

6. Sensor Connector (to transmitter) 14. Pressure Regulator

7. Flow Meter 15. Barbed Fitting for

/8-inch atmospheric drain tubing

8. Measuring Cell 16. Flow Meter

23.2 °C

Display 2

ClO

ppm

0.065

l/h

WATER

9100

Esc Enter

on off

zero

min

23.2 °C

Display 2

ClO

ppm

0.065

9100

Esc

Hach Company

5600 Lindberg Drive

P.O.Box 389

Loveland,CO 80539

U.S.A.

Type:

Model:

Serial No.:

Made in the E.E.C.

ETL LISTED

UL STD 1262

H0492805390

CERTIFIED

CSA STD C22.2 NO.142

Installation

4.4 Electrical Connections

DANGER

A qualified technician should make all electrical connections to ensure compliance

to all applicable electrical codes. If permanent connection (conduit) is required to

meet UL, CSA and other applicable instrument safety standards, an external power

disconnect switch must be installed. This power disconnect switch should be

located near the instrument.

4.4.1 Power Connections

The product enclosure is rated IP65; however, achieving this protection level

depends on the use of proper hardware in the installation of this product.

NEMA-approved conduit hardware is recommended. Select the style of conduit

hardware that will seal to the enclosure wall when using flexible or rigid conduit.

Remember to follow all local electrical codes for your area.

Note: Power feeds (ac) to the

instrument which are not contained

in properly grounded metal conduit

can be a source of instrumentation

upset or failure if surge or transient

disturbance levels exceed those

levels specified for industrial type

products.

For process or industrial applications, the national electrical codes of most

countries require that ac service needs be hard-wired and contained in conduit

systems. This instrument has been designed to conform to this requirement. Hach

Company recommends conduit for two reasons:

1. It is generally required by most local electrical codes.

2. Use of metal conduit can improve immunity to lightning surges and ac power

transients.

Note: If power cords are allowed by

local electrical code, a 125V

UL/CSA approved power cord with

an approved NEMA-style strain

relief and a standard 115V North

American-style plug

(Hach Cat. No. 46306-00) or a

230V VDE-approved power cord

with an approved NEMA-style strain

relief and a Continental European-

style plug (Hach Cat. No. 46308-00)

can be ordered.

Electrical and instrumentation standards require a local means of removing power

from the product. Since this instrument does not have an on/off switch, the

customer must provide one. This may be accomplished with a customer-supplied

power cord or switch box (see Figure 9 and Figure 10). A power cord method is

only acceptable if local codes permit and the considerations outlined in this

section are addressed.

In hard-wired electrical applications the power and safety ground service drops

should be no longer than 6 meters (20 feet) unless metal conduit is used to shield

the ac power wiring. The wire should be no smaller than 14 gauge.

In applications where power cords are allowed and power surges and transients

are not a great concern, an 18 gauge, 3-conductor power cord (including a safety

ground wire) can be used, but its length must not exceed 3 meters (10 feet).

Power connections are made at the terminal strip that is accessible when the front

cover and internal shielding are removed. Use only provided cord connected

strain reliefs to ensure sealing and protection against dust and moisture. Use

NEMA sealing hardware as appropriate (see Figure 11).

A power source with 100–240 V ac ± 10% is acceptable for this instrument. The

power supply terminal strip can be removed from its housing for connections. For

best results, electrical connections must always remain dry and clean in order to

ensure reliable instrument operation. Ensure that the cables are positioned

correctly when opening the transmitter.

Installation

Figure 9 Connecting ac Power with Customer-supplied Power Cord

Figure 10 Connecting ac Power with Customer-supplied Switch Box

4.4.2 Electrostatic Discharge (ESD) Considerations

Important Note: The analyzer

circuit board components are

EXTREMELY sensitive to static

electricity damage in a powered or

unpowered state. Do not touch

circuit boards or its components

without wearing a grounded wrist

strap.

Delicate internal electronic components can be damaged by static electricity,

resulting in degraded instrument performance or eventual failure. Take the

following steps to prevent ESD damage to the instrument:

• Before touching any instrument electronic components (such as printed circuit

cards and the components on them) discharge static electricity from your

body. This can be accomplished by touching an earth-grounded metal surface

such as the chassis of an instrument, or a metal conduit or pipe.

1. Power Terminal 2. Power Cord Strain Relief

1. Power Terminal 2. Conduit Strain Relief

IC1

RE4

RE3

RE2

RE1

Model : 09125-A-2000

Serial No : 0104 549

Ind : D

Wiring located behind the guide plate shall be

rated at 80 C (176 F) or higher.

Vac : 100 - 240 V

IC2

RP1

Ic4

RP2

Ref

Temp +

Temp –

Counter

Work

Aux

9180

AMP

V1.03

IC1

RE4

RE3

RE2

RE1

Model : 09125-A-2000

Serial No : 0104 549

Ind : D

Wiring located behind the guide plate shall be

rated at 80 C (176 F) or higher.

Vac : 100 - 240 V

IC2

RP1

Ic4

RP2

Ref

Temp +

Temp –

Counter

Work

Aux

9180

AMP

V1.03

Installation

• To reduce static build-up, avoid excessive movement. Transport static-

sensitive components in anti-static containers or packaging.

• To discharge static electricity from your body and keep it discharged, wear a

wrist strap connected by a wire to earth ground.

• Handle all static-sensitive components in a static-safe area. Use anti-static

floor pads and work bench pads.

4.4.3 Wiring the Instrument for Power

Use a 3-wire, single-phase power supply with an appropriate cross-section for

the required power. Connect to the instrument power terminal as follows:

DANGER

This instrument should be

installed by qualified technical

personnel to ensure adherence to

all applicable electrical codes.

1. Remotely disconnect instrument power before opening the analyzer door.

2. Remove the four screws from the front cover. Open the cover. Remove the

internal shielding plate (4.4.3).

3. Strip the outside insulation of each wire back ¼-inch (Figure 12).

4. Route the wires or approved power cord through the back right conduit

opening. Use the provided cord-connected strain reliefs to ensure adequate

sealing. Use appropriate NEMA sealing hardware (4.4.3 on page 17).

5. Using the connection diagram on the shield plate, insert the wire ends into the

mains connector until the insulation seats against the connector (Figure 12).

6. Tighten the connectors using a small flat-head screwdriver. Firmly tug each

wire to ensure solid connections.

7. Reinstall the shielding plate and front cover if all of the wiring is complete.

Figure 11 Using the Optional Strain Relief and Conduit Hole Sealing Plug

1. Power cord strain relief 2. Conduit strain relief 3. Conduit hole sealing plug

Installation

Figure 12 Removing the Shielding Plate

Figure 13 Proper Wire Preparation and Insertion

4.4.4 Alarm Connections

DANGER

The relay connection area is

designed for only high voltage

(100–240 V ac) connections. A

shock hazard can exist if low

voltage (<30V) connections are

simultaneously made in the relay

connection area.

The product enclosure is IP65; however, achieving this protection level depends

on the use of proper hardware during installation. Use standard off-the-shelf

NEMA-approved conduit hardware. Take care to select the style of conduit

hardware that will seal to the enclosure wall when using flexible or rigid conduit.

The analyzer contains four unpowered alarm relays (3 A resistive,

100–230 V ac) designed for use with high voltage (greater than 30V-RMS). The

Normally Open and Common relay contacts are connected when an alarm

condition is active. The relay connector accepts 18–12 AWG wire. Determine wire

gauge based on load application. Less than 18 AWG is not recommended.

Note: Current to the relay contacts

must be limited to 3 amps resistive.

Local removal of power from the

relays must be available in case of

emergency or for servicing the

product. If the relay contacts are

supplied with greater than 30 Volts,

power removal can be made with an

external switch and a 3-amp fuse or

with a switched 3-amp circuit

breaker.

1. Remotely disconnect all instrument power before opening the analyzer door.

2. Strip the insulation on each wire back ¼-inch.

3. Remove the front cover. Remove the shielding plate inside the instrument.

4. Route the wire through the back right conduit opening. Use the provided

cord-connected strain reliefs. Use appropriate NEMA sealing hardware.

5. Insert the wire ends into the connector until the insulation seats against the

connector. Refer to Figure 14 and Table 1 on page 21.

1. Shielding Plate 3. Ground stud (pulls the shield out of the instrument)

2. Thumbscrew (loosen to remove shield)

1. Strip ¼-inch of insulation. 2. Seat insulation against connector with no bare wire exposed.

IC1

RE4

RE3

RE2

RE1

Model : 09125-A-2000

Serial No : 0104 549

Ind : D

Wiring located behind the guide plate shall be

rated at 80 C (176 F) or higher.

Vac : 100 - 240 V

Serial N°:

50/60Hz

25VA

Vac: 100 – 240

S3/Sys.Alarm

S4/Timer

Mains

T 2A L

250V

Caution: For continued protection

against risk of fire, replace only

with same type and rating fuse.

Analog

Outputs

Serial com.

(option)

Relays

Amp. module

Preamp.

Supply

RX/TX +

Temp +

RX/TX –

Shield

Temp –

Ref.

Counter

Work

GND

Aux

GND

–V

Amperometry 9180

under shielding plate

IC2

RP1

Ic4

RP2

Ref

Temp +

Temp –

Counter

Work

Aux

9180

AMP

V1.03

Mains

Installation

Note: Primary components may

become hot under high line voltage

and ambient temperature

conditions. ac wiring insulation must

be rated a minimum of 95 °C.

6. Tighten the connectors using a small flat-head screwdriver. Firmly tug on

each wire to ensure solid connections.

7. Reinstall the shielding plate and front cover if all of the wiring is complete.

8. See section 5.2 on page 26 for information on setting alarms.

Figure 14 Relays Terminal Strip

4.4.5 Analog and RS485 Output Connections

This transmitter is designed for either a 4–20 or 0–20 mA output with a maximum

800 ohm load. Make output connections with twisted-pair shielded wire. Connect

the shield at the recorder or controlled component end only. On the opposite end,

remove the shield and insulate the remaining wires.

Note: The RS485 card is factory

installed, it does not need to be

re-installed.

1. Remotely disconnect all instrument power before opening the analyzer door.

2. Remove the front cover.

3. Strip the insulation on the outer jacket back 7 inches. Remove the conductors

from the shield.

4. Cut the shield to 1 inch. Connect it to the ground on the shielding plate.

Note: Use a twisted-pair, shielded

cable. Use of non-shielded cable

may result in radio frequency

emission or susceptibility levels

higher than allowed.

5. Strip the insulation on the remaining wires back ¼-inch.

6. Route the wire through the front left conduit opening. Use the provided

cord-connected strain reliefs to ensure adequate sealing. Use appropriate

NEMA sealing hardware.

7. Insert the wire ends into the Analog or RS485 connector until the insulation

seats against the connector. Refer to 4.5 and Table 1 on page 21.

8. Tighten the connectors using a small flat-head screwdriver. Firmly tug on

each wire to assure solid connections.

9. Reinstall the shielding plate and front cover if all of the wiring is complete.

IC1

RE4

RE3

RE2

RE1

Model : 09125-A-2000

Serial No : 0104 549

Ind : D

Wiring located behind the guide plate shall be

rated at 80 C (176 F) or higher.

Vac : 100 - 240 V

IC2

RP1

Ic4

RP2

Ref

Temp +

Temp –

Counter

Work

Aux

9180

AMP

V1.03

Relays (S1– S4)

S3/Sys. Alarm

S4/Timer

Installation

Figure 15 Analog and RS485 Terminal Strips

4.4.6 Sensor Connections

To reattach the sensor cable:

1. Remotely disconnect all instrument power before opening the analyzer door.

Remove the front cover.

2. Route the probe cable through the front right conduit opening. Use the

provided cord-connected strain reliefs to ensure adequate sealing. Use

appropriate NEMA sealing hardware.

3. Insert the wire ends into the “amp module” connector until the insulation seats

against the connector. Refer to Figure 16 and Table 1 on page 21.

4. Tighten the connectors using a small flat-head screwdriver. Firmly tug on

each wire to assure solid connections.

5. Reinstall the shielding plate and front cover if all of the wiring is complete

1. RS485 Circuit Card 3. Analog Connections

2. Headers for mounting RS485 Circuit Card 4. K9–Shield Connections

IC1

RE4

RE3

RE2

RE1

Model : 09125-A-2000

Serial No : 0104 549

Ind : D

Wiring located behind the guide plate shall be

rated at 80 C (176 F) or higher.

Vac : 100 - 240 V

IC2

RP1

Ic4

RP2

Ref

Temp +

Temp –

Counter

Work

Aux

9180

AMP

V1.03

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Hach 621-691-086 Instrument Manual

Brand: Hach

Model: 621-691-086

Type: Instrument Manual

This manual is also suitable for

9186

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Hach 621-691-086 Instrument Manual

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Hach 621-691-086 Instrument Manual

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