Hach NX7500 User manual

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Table of contents

Specifications on page 3 Maintenance on page 15

General information on page 5 Troubleshooting on page 16

Installation on page 8 Replacement parts and accessories on page 17

Operation on page 13

Legal information

Manufacturer: TriOS Mess- und Datentechnik GmbH

Distributor: Hach Lange GmbH

The translation of the manual is approved by the manufacturer.

Specifications

Specifications are subject to change without notice.

Specification Details

Detector type High-end miniature spectrometer, 256 channels

UV: 200 to 360 nm (0.8 nm/pixel)

Light source Xenon flash lamp

Parameter Nitrate, Nitrite, TSS

eq

, SAC

254

, COD

eq

, BOD

eq

, TOC

eq

, DOC

eq

, KHP, COD-SAK

eq

, BOD-

SAK

eq

, Abs210, Abs254, Abs360

Dimensions (Ø x L) 48.3 mm (1.9 in) x 460 mm (18.1 in)

Cable length 10 m (32.8 ft) attached at the probe, maximum 30 m (98.4 ft) by extension cables

Enclosure Stainless steel 1.4571/1.4404 or titanium 3.7035

Weight Stainless steel 3 kg (6.61 lb), titanium 2 kg (4.41 lb)

Protection class Immersion probe, 30 m (98.4 ft) water depth maximum

Pressure 3 bar maximum, in the flow cell 1 bar maximum, 2 to 4 L/min

Flow rate 0.1 to 10 m/s

Power requirements The controller supplies power to the probe

Power consumption Less than 8 W

Interface 8-pole M12 plug

Operating temperature 0 °C to 40 °C (32 °F to 104 °F), internal temperature compensation

Storage temperature –20 °C to 80 °C (–4 °F to 176 °F)

Optical path length 0.3, 1, 2, 5, 10 and 50 mm (0.01, 0.04, 0.08, 0.2, 0.39 and 1.97 in)

Certifications CE

Warranty EU: 2 years, US: 1 year

English 3

Table 1 Specifications—0.3 mm (0.01 in) optical path

Parameter Measuring range Detection limit

1

Nitrate, NO

3

-N 1 to 330 mg/L 1 mg/L

Nitrite, NO

2

-N 1.7 to 500 mg/L 1.7 mg/L

COD

eq

/BOD

eq

100 to 7300 mg/L 100 mg/L

DOC

eq

/TOC

eq

17 to 3300 mg/L 17 mg/L

Table 2 Specifications—1 mm (0.04 in) optical path

Parameter Measuring range Detection limit

2

Nitrate N-NO

3

0.3 to 100 mg/L 0.3 mg/L

Nitrite N-NO

2

0.5 to 150 mg/L 0.5 mg/L

COD

eq

/BOD

eq

30 to 2200 mg/L 30 mg/L

DOC

eq

/TOC

eq

5 to 1000 mg/L 5 mg/L

Table 3 Specifications—2 mm (0.08 in) optical path

Parameter Measuring range Detection limit

2

Nitrate N-NO

3

0.15 to 50 mg/L 0.15 mg/L

Nitrite N-NO

2

0.25 to 75 mg/L 0.25 mg/L

COD

eq

/BOD

eq

15 to 1100 mg/L 15 mg/L

DOC

eq

/TOC

eq

2.5 to 500 mg/L 2.5 mg/L

Table 4 Specifications—5 mm (0.2 in) optical path

Parameter Measuring range Detection limit

2

Nitrate N-NO

3

0.06 to 20 mg/L 0.06 mg/L

Nitrite N-NO

2

0.1 to 30 mg/L 0.1 mg/L

COD

eq

/BOD

eq

6 to 440 mg/L 6 mg/L

DOC

eq

/TOC

eq

1 to 200 mg/L 1 mg/L

Table 5 Specifications—10 mm (0.39 in) optical path

Parameter Measuring range Detection limit

2

Nitrate N-NO

3

0.03 to 10 mg/L 0.03 mg/L

Nitrite N-NO

2

0.05 to 15 mg/L 0.05 mg/L

COD

eq

/BOD

eq

3 to 220 mg/L 3 mg/L

DOC

eq

/TOC

eq

0.5 to 100 mg/L 0.5 mg/L

1

The detection limit specification refers to a standard reference solution with lab conditions. For

probes with 0.3 mm optical path length, it is recommended to adjust NO

3

and NO

2

readings by

a factor calibration. Use standard solutions or grab samples with known values to calibrate the

probe.

2

The detection limit specification refers to a standard reference solution with lab conditions.

4 English

Table 6 Specifications—50 mm (1.97 in) optical path

Parameter Measuring range Detection limit

2

Nitrate N-NO

3

0.006 to 2 mg/L 0.006 mg/L

Nitrite N-NO

2

0.01 to 3 mg/L 0.01 mg/L

COD

eq

/BOD

eq

0.6 to 44 mg/L 0.6 mg/L

DOC

eq

/TOC

eq

0.1 to 20 mg/L 0.1 mg/L

General information

In no event will the manufacturer be liable for direct, indirect, special, incidental or consequential

damages resulting from any defect or omission in this manual. The manufacturer reserves the right to

make changes in this manual and the products it describes at any time, without notice or obligation.

Revised editions are found on the manufacturer’s website.

Safety information

N O T I C E

The manufacturer is not responsible for any damages due to misapplication or misuse of this product including,

without limitation, direct, incidental and consequential damages, and disclaims such damages to the full extent

permitted under applicable law. The user is solely responsible to identify critical application risks and install

appropriate mechanisms to protect processes during a possible equipment malfunction.

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

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

operator or damage to the equipment.

Make sure that the protection provided by this equipment is not impaired. Do not use or install this

equipment in any manner other than that specified in this manual.

Use of hazard information

D A N G E R

Indicates a potentially or imminently hazardous situation which, if not avoided, will result in death or serious injury.

W A R N I N G

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

injury.

C A U T I O N

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

N O T I C E

Indicates a situation which, if not avoided, may cause damage to the instrument. Information that requires special

emphasis.

English 5

Precautionary labels

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

could occur if not observed. A symbol on the instrument is referenced in the manual with a

precautionary statement.

This is the safety alert symbol. Obey all safety messages that follow this symbol to avoid potential

injury. If on the instrument, refer to the instruction manual for operation or safety information.

This symbol indicates that a risk of electrical shock and/or electrocution exists.

This symbol identifies the presence of a strong corrosive or other hazardous substance and a risk of

chemical harm. 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 indicates the presence of devices sensitive to Electro-static Discharge (ESD) and

indicates that care must be taken to prevent damage with the equipment.

This symbol indicates the need for protective eye wear.

Electrical equipment marked with this symbol may not be disposed of in European domestic or public

disposal systems. Return old or end-of-life equipment to the manufacturer for disposal at no charge to

the user.

Electromagnetic waves

W A R N I N G

Multiple hazards. Do not disassemble the instrument for maintenance. If the internal components must

be cleaned or repaired, contact the manufacturer.

W A R N I N G

Electromagnetic radiation hazard. Do not use the instrument in dangerous environments.

N O T I C E

This instrument is sensitive to electromagnetic and electromechanical interference. These interferences can have

an effect on the analysis performance of this instrument. Do not put this instrument near equipment that can

cause interference.

Obey the safety information that follows to operate the instrument in accordance with local, regional

and national requirements.

• Do not operate the instrument in hospitals and equivalent establishments or near medical

equipment, such as pace makers or hearing aids.

• Do not operate the instrument near highly flammable substances, such as fuels, highly flammable

chemicals and explosives.

• Do not operate the instrument near combustible gases, vapors or dust.

• Keep the instrument away from strong vibration or shock.

6

English

• The instrument can cause interference in immediate proximity to televisions, radios and

computers.

• The warranty does not cover improper use or wear.

Chemical and Biological Safety

D A N G E R

Chemical or biological hazards. If this instrument is used to monitor a treatment process and/or

chemical feed system for which there are regulatory limits and monitoring requirements related to

public health, public safety, food or beverage manufacture or processing, it is the responsibility of the

user of this instrument to know and abide by any applicable regulation and to have sufficient and

appropriate mechanisms in place for compliance with applicable regulations in the event of malfunction

of the instrument.

Normal operation of this device may require the use of chemicals or samples that are biologically

unsafe.

• Observe all cautionary information printed on the original solution containers and safety data

sheets prior to their use.

• Dispose of all consumed solutions in accordance with the local and national regulations and laws.

• Select the type of protective equipment suitable to the concentration and quantity of the dangerous

material being used.

Product overview

The NX7500 is a multi-parameter scanning UV probe. Refer to Figure 1. Use the probe for

photometric measurements in aqueous solutions in waste water, drinking water and environmental

applications.

The probe connects to a CD500 or a CD300 digital controller to monitor the measurement data,

calibration and configuration.

Figure 1 Product overview

1 Optical path with optical windows 4 Hanging ring

2 Probe 5 Probe cable with connector

3 Chain holder mount 6 Compressed air connector

English 7

Product components

Make sure that all components have been received. Refer to Figure 2. If any items are missing or

damaged, contact the manufacturer or a sales representative immediately.

Figure 2 Product components

1 Probe 2 Compressed air connector

Theory of operation

The probe has a light source, a lens system, optical path through the medium and a spectrometer.

The probe uses a xenon flash lamp as a broadband light source. The light goes through the optical

path in the medium, and the medium absorbs some light. The spectrometer records the remaining,

spectrally resolved light and determines the intensity at multiple wavelengths in a wavelength range.

A measurement in ultrapure water calibrates the probe to zero (by the manufacturer).

The analysis software calculates the absorption value with concentrations or concentration

equivalents.

Installation

C A U T I O N

Multiple hazards. Only qualified personnel must conduct the tasks described in this section of the

document.

Installation guidelines

Note: Make sure that the enclosure of the probe is titanium before use in sea water.

• Do not use stainless steel probes in sea water or other corrosion-causing media (e.g., acids,

alkalis, chlorine-based compounds). Clean the probe immediately.

• Do not use titanium probes in bromine, hydrofluoric acid and hot acids. Clean the probe

immediately if the probe touches hydrofluoric acid or hot acids.

• The seals of the probe are made of NBR (nitrile butadiene rubber). Make sure that the measuring

medium does not cause damage to the probe components.

8

English

• Do not replace the cable. If the cable has damage, contact the manufacturer.

• Make sure that the cable is not routed near hot surfaces. Make sure not to put heavy objects on

the cable.

• Make sure that there are no unwanted materials in the optical path.

• Immediately set the instrument to OFF if the probe sends out smoke, noxious fumes or gets hot.

Contact the manufacturer.

Installation overview

Figure 3 shows an example of the probe installation with a chain holder option. Figure 4 shows an

example of the probe installation with a flow cell option. Refer to the installation documentation to

install the sensor.

Put the probe into the sample. Make sure that the optical path is fully immersed in the sample. Install

the sensor transversally to the flow direction of the sample so the particle on the windows are at a

minimum and the nano-layer function gives the optimum support. Refer to Figure 5.

Note: Make sure that the probe does not touch the ground.

Figure 3 Chain holder installation

English 9

Figure 4 Sensor with flow cell installation

1 Outflow, 6 mm OD 3 Flow cell

2 Connector for cleaning fluid 4 Inflow, 8 mm OD

Figure 5 Flow direction

Connect the probe to the controller

N O T I C E

Never connect the sensor to the controller when the controller is energized or damage to the sensor can

occur.

The probe has a 10 m fixed cable with an M12 industrial plug that connects to a digital controller for

signal transmission and power. Refer to Figure 6 and Figure 7.

10

English

Extension cables are available if a longer cable is necessary. Connect the probe cable to an

available COM port on the controller. Refer to the controller documentation for more information

about the COM ports and the probe connection.

Figure 6 Connect the probe to the controller

Figure 7 M12 industrial plug—Face view (male)

Table 7 Pin assignment for the 8-pin connector

Number Description

1 RS232 RX / RS485 A (commands)

2 Ground (Power + serial interface)

3 ETH_TX+

4 ETH_TX–

5 Power (12 to 24 VDC)

6 ETH_RX+

7 ETH_RX–

8 RS232 TX / RS485 B (data)

English 11

Attach compressed air (not for flow cell operation)

N O T I C E

Make sure that the air pressure is not more than 7 bar or damage to the valve can occur.

The probe has measuring windows with nano-coating and a compressed air cleaning system. Both

components are important to prevent particles in the optical path or fouling of the measuring

windows.

1. Use a 13 mm (0.5 in.) wrench to install the compressed air connector on the probe. Refer to

Figure 8.

2. Attach the compressed air tube to the compressed air connector. Refer to Figure 8.

3. For the compressed air line, install the High Output Airblast System (HOAB), the optional High

Pressure Air Cleaning System or a magnetic valve/external compressed air supply. Set the air

pressure between 3 and 6 bar. Make sure that the total length of the compressed air line is less

than 25 m (82 ft).

Note: Do not make a measurement during the cleaning interval. When compressed air supply is controlled by

the controller, measurement and cleaning are synchronized. Refer to Set the automatic cleaning options

on page 13.

Note: Add a check valve in the compressed air line to prevent clogging in the compressed air connector.

Figure 8 Compressed air connection

1 Compressed air connector 3 Optical windows

2 Compressed air line 4 Optical path

12 English

Set the automatic cleaning options

Set the cleaning options on the controller.

1. On the main screen, push Options.

2. Select Cleaning.

3. Select an option.

Option Description

Cleaning activated Select to enable the automatic cleaning.

Cleaning raster Sets the cleaning interval (default: 15 minutes). The frequency of the cleaning

interval selected depends on the sample composition and the measurement

interval.

Cleaning duration Sets the time of the cleaning (default 5 seconds).

Pause before

measurement

Sets the time for the hold condition after the cleaning cycle (default

10 seconds). During hold condition the measurements are stopped and the

mA outputs signals are fixed (Hold).

Use valve Select to start the automatic cleaning with a valve.

3

Use relay Select to start the automatic cleaning with a relay.

Force cleaning now Select to manually start a cleaning cycle, then push Execute.

Operation

Configure the probe

Use the Sensor menu to enter identification information, configure the measurement and to change

options for probe settings, data handling and storage.

1. From the Main menu, select Sensor.

The connected sensors and the measuring parameters of each sensor shows on the COM port

windows.

2. Select the sensor.

The measured value and the log protocol shows.

3. Select an option.

Option Description

DESCRIPTION Adds a description of the measurement site. Use the description to identify

measurement locations (e.g., Areation tank 1). The description is kept with the

measurement values in the controller data log.

AUTOMATIC

MEASUREMENT

Select to enable automatic measurements.

3

Refer to the controller documentation to connect valves or relays to the system.

English 13

Option Description

STORING Sets the settings for data storage:

• Enabled: Select to enable data storage for the individual probe.

• Comment: Adds a comment in the stored measurement values.

• Interval: Sets the storage interval in the data log. Set 0 seconds to disable.

LOG PROTOCOL

4

Sets the settings for the probe login protocol (default: Modbus).

Note: The log protocol is the type of data used to save the data on the controller.

The log protocol is set at the COM port window. Refer to the controller

documentation for additional information.

4. On the lower menu bar 4 options show

Option Description

SAMPLE Manually starts a measurement.

RESET Sets the probe settings back to the factory default settings.

MARK Records the next measured value in the data log.

Data Logging

The probe has one data log that keeps approximately 42,000 measurements. The factory-set

measurement interval is 2 minutes. When the data log is full, new data replaces the oldest data.

Refer to the controller documentation for instructions on how to access and export the data log.

Calibrate the sensor

Probes are factory calibrated. The probe cannot be calibrated by the user. Contact the manufacturer

for instrument calibration.

If necessary, the user can set a factor (or offset) to adjust the measurements to reference values.

Use the offset to adjust the values of the probe compared to laboratory values when constant

deviations of the measurement are seen. The adjustment of the offset lowers or increases the

calibration curve of the probe. Refer to the instructions for the 0.3 mm optical path length sensors

that follow.

Calibrate instruments with an 0.3 mm optical path length to adjust the NO

3

and NO

2

readings. Use

grab samples with known values or standard solutions to determine the calibration factor. Enter the

parameter factors and offsets.

If necessary, enter the upper and lower limit values for the warning thresholds. The warning

thresholds are the color limits used to program concentrations at which the controller shows a red or

yellow warning for the probe. For example, the Nitrate value is important for the user and should not

go above 10 mg/L. Then the user sets the upper limit 1 (yellow) at 8 mg/L and the upper limit 2 (red)

at 10 mg/L. If the measurement value is higher than the limit the controller changes the color to

yellow or red on the home screen of the sensor.

1. From the Main menu, select Sensor.

The connected probes show on the COM port windows.

2. Select the parameter.

3. Select an option.

Option Description

Alternative name for display Sets an alternative name for the measured paramenter.

Use user Select to enable a scaling factor to apply on the measurements.

Offset Sets the reading offset value for the parameter.

4

The name of the log protocol shows on the screen.

14 English

Option Description

Scaling factor Sets the factor to calculate the value.

Colorize above upper limits Select to enable the upper warning threshold.

Upper limit 1 (yellow) Sets the first upper limit for the warning threshold.

Upper limit 2 (red) Sets the second upper limit for the warning threshold.

Colorize above lower limits Select to enable the lower warning threshold.

Lower limit 1 (yellow) Sets the first lower limit for the warning threshold.

Lower limit 2 (red) Sets the second lower limit for the warning threshold.

Maintenance

W A R N I N G

Multiple hazards. Only qualified personnel must conduct the tasks described in this section of the

document.

N O T I C E

Do not disassemble the instrument for maintenance. If the internal components must be cleaned or repaired,

contact the manufacturer.

Clean the instrument

Clean the exterior of the instrument with a moist cloth and a mild soap solution and then wipe the

instrument dry as necessary.

To remove hard dirt, soak the sensor for some hours in a rinsing solution. Use a sponge if necessary.

Make sure that the sensor connector is always dry and clean.

Brownish dirt or points are unwanted material of iron or manganese oxides. Use a 5% oxalic acid or

10% ascorbic acid solution to clean the sensor. Make sure that the sensor touches the acid only a

short time and is then rinsed fully with plenty of water.

Note: Do not use alcohol, benzene, dilutor or other flammable material to clean the instrument.

Note: Do not scratch the glass of the windows.

1. From the Main menu, select Options.

2. Select Service mode to set the relay for the compressed air cleaning to HOLD.

Note: Service mode also disables measurements.

3. Remove the sensor from the basin or flow cell.

4. Clean the instrument.

5. Select Cleaning and push EXECUTE to clean the measuring window. Refer to Clean the

measuring window on page 15.

6. When the cleaning is complete, push Service mode to remove the HOLD condition.

Clean the measuring window

W A R N I N G

Chemical exposure hazard. Obey laboratory safety procedures and wear all of the personal protective

equipment appropriate to the chemicals that are handled. Refer to the current safety data sheets

(MSDS/SDS) for safety protocols.

English 15

The measuring window is made of quartz glass. Rinse the measuring window with tap water to

remove particles. Then, clean the measuring window with a few drops of acetone and a lint-free

cloth.

To remove a thin layer at the windows, use a soft cloth or clean water. Do not use harsh cleaning

solutions, spatula, sand paper or cleaning products with abrasive ingredients to remove continuous

dirt. Contact the manufacturer to replace damaged windows.

Note: Do not scratch the glass of the windows.

Note: Make sure not to touch the window surface with fingers.

1. From the Main menu, select Options.

2. Select Service mode to set the relay for the compressed air cleaning on HOLD.

Note: The Service mode also disables measurements.

3. Remove the sensor from the basin or flow cell.

4. Clean the measuring window with a cleaning agent and a cloth.

5. When the cleaning is complete, push Service mode to remove the HOLD condition.

Clean the compressed air connector

1. Manually clean the compressed air connector 1–2 times a week.

2. Clean the compressed air connector if very fine mud clogs the cleaning connector.

To prevent blockages, install a check valve.

Troubleshooting

Disconnect the compressed air cleaning system before the sensor is removed from the basin.

Problem Solution

The controller cannot

find the sensor.

Examine the cable and the probe connector for damage. Contact the technical support if

there are damages.

The sensor readings

are much higher or

lower than expected.

1. Make sure that settings for factor and offset are correct. Refer to Calibrate the sensor

on page 14.

2. Identify the expected measuring value is measurable with the installed optical path

length.

3. Measure the optical path length of the sensor. Make sure that the correct length is set

in the controller settings. Refer to the controller documentation for more information.

4. Clean the measuring windows. Refer to Clean the measuring window on page 15.

5. Put the sensor in a container with a known target parameter concentration (sample or

standard). Make sure that there are no air bubbles between the measuring windows.

Use a syringe to put sample between the measuring windows.

• If the readings are correct—There is an issue with dirt or air bubbles blocking the

optical path in the application. Change the location or the cleaning settings.

Contact the technical support.

• If the readings are not correct—Contact the technical support.

16 English

Problem Solution

The sensor readings

show "Range" when

the measurement is

not within the

measurment range

or the value is not

calculated correctly.

1. Examine the optical path for a blockage. Clean the measuring windows. Refer to

Clean the measuring window on page 15.

2. Make sure that all of the measured parameters are within the measurement range.

Refer to Specifications on page 3.

3. If Nitrite and Nitrate are measured, make sure that the difference between the Nitrite

and Nitrate values is not higher than a factor of ×20. If the difference between the

values is too high, the probe cannot correctly calculate the concentration for the two

parameters.

4. Make sure that settings for factor and offset are correct. Refer to Calibrate the sensor

on page 14.

5. Identify if the expected measuring value is detectable with the installed optical path

length.

6. Measure the optical path length of the sensor. Make sure that the correct length is set

in the controller settings. Refer to the controller documentation for more information.

7. Identify if a long-term averaging is set in the analog output card menu.

If none of the steps gives a solution to the problem, contact the technical support.

The compressed air

cleaning does not

work.

1. Examine the compressed air hoses and wiring for damage. Replace components if

there are damage.

2. Make sure that the relay wiring is correct. Refer to the controller documentation.

3. Examine the settings of the cleaning interval in the NX7500 configuration. Refer to

Configure the probe on page 13.

4. Examine the controller settings for the cleaning. Refer to the controller

documentation.

5. Identify if there is a nozzle blockage at the probe. Remove the 90° hose connector

and carefully clean the nozzle with a needle from the rear side. Make sure that the

measuring windows are not damaged. Clean the 90° connector before re-assembly.

Replacement parts and accessories

W A R N I N G

Personal injury hazard. Use of non-approved parts may cause personal injury, damage to the

instrument or equipment malfunction. The replacement parts in this section are approved by the

manufacturer.

Note: Product and Article numbers may vary for some selling regions. Contact the appropriate distributor or refer to

the company website for contact information.

Replacement parts

Description Item no.

Hanging ring, 5 mm (0.2 in.) LZY668

90° connection at sensor, compressed air hose LXZ529.99.00003

O-ring and screw set, flow cell, includes hexagon key LXZ529.99.00004

Fitting set for flow cell LXZ529.99.00005

Compression ring, flow cell (2x) LXZ529.99.00006

Panel with screws, flow cell LXZ529.99.00007

English 17

Accessories

Description Item no.

Chain mounting set with chain, 5 m (16.4 ft) LZX914.99.11110

Stainless steel chain with lock, 5 m (16.4 ft) LZY232

HOAB (High output air blast system), 230 V 6860103.99.0001

Cable kit, HOAB LZY499

Check valve (magnetic valve, external compressed air supply) LZX651

Hose, 4 mm ID, 6 mm OD, 5 m (16.4 ft) LZY619

Hose, 4 mm ID, 6 mm OD, 10 m (32.8 ft) LZY620

Hose, 4 mm ID, 6 mm OD, 25 m (82.0 ft) LZY621

Hose, 6 mm ID, 8 mm OD, 5 m (16.4 ft) LZY672

Hose, 6 mm ID, 8 mm OD, 10 m (32.8 ft) LZY673

Flow cell ultrasonic, panel, NX7500, 0.3 to 10 mm path length LXZ529.99.0003A

Flow cell, panel, NX7500, 0.3 to 10 mm path length LXZ529.99.B0001

Extension cable, 8-pole connector, 10 m (32.8 ft) LXZ529.99.C0001

Extension cable, 8-pole connector, 25 m (82.0 ft) LXZ529.99.C0002

CD500 controller LXZ529.99.A002A

CD300 controller LXZ529.99.0001A

18 English

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*DOC023.L1.90581*

HACH COMPANY World Headquarters

P.O. Box 389, Loveland, CO 80539-0389 U.S.A.

Tel. (970) 669-3050

(800) 227-4224 (U.S.A. only)

Fax (970) 669-2932

[email protected]

www.hach.com

HACH LANGE GMBH

Willstätterstraße 11

D-40549 Düsseldorf, Germany

Tel. +49 (0) 2 11 52 88-320

Fax +49 (0) 2 11 52 88-210

[email protected]

www.de.hach.com

TriOS Mess-

und Datentechnik GmbH

Bürgermeister-Brötje-Str. 25

D-26180 Rastede

Germany

©

Hach Company/Hach Lange GmbH, 2016—2018.

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