Hanna Instruments BL121-10,BL121-20 Owner's manual

Brand: Hanna Instruments

Model: BL121-10,BL121-20

Category: Measuring, testing & control

Type: Owner's manual

INSTRUCTION MANUAL

BL121

SWIMMING POOL

CONTROLLER

Thank you for choosing a Hanna Instruments product.

Please read this instruction manual carefully before using this instrument. This manual will provide you with the necessary

information for correct use of this instrument, as well as a precise idea of its versatility.

If you need additional technical information, do not hesitate to e-mail us at [email protected] or view our worldwide

contact list for a Hanna Instruments representative near you at www.hannainst.com.

Dear

Customer,

All rights are reserved. Reproduction in whole or in part is prohibited without the written consent of the copyright owner,

Hanna Instruments Inc., Woonsocket, Rhode Island, 02895, USA.

Pool Controller Contents .........................................................................................................................................................................

Description ...........................................................................................................................................................................................

Controller Overview ...............................................................................................................................................................................

Product Diagram Front Panel ..........................................................................................................................................................

Rear Sub Panel .............................................................................................................................................................................

Connections, Alarm, Output and Power ............................................................................................................................................

Keypad Function ...........................................................................................................................................................................

Setup/Installation .................................................................................................................................................................................

General Installation Guidelines .......................................................................................................................................................

Pool Controller Install ....................................................................................................................................................................

Saddle Installation ........................................................................................................................................................................

Probe Installation .........................................................................................................................................................................

Installing Aspiration Filters ............................................................................................................................................................

Installing Injectors ........................................................................................................................................................................

Flow-Cell Installation ....................................................................................................................................................................

Controller Menu ............................................................................................................................................................................

User Interface Map ........................................................................................................................................................................

User Interface in Parameter Setup ..................................................................................................................................................

User Interface in General Setup ......................................................................................................................................................

Operational Guide .................................................................................................................................................................................

Measure .......................................................................................................................................................................................

pH Calibration ..............................................................................................................................................................................

ORP Calibration ............................................................................................................................................................................

GLP Information ............................................................................................................................................................................

Controller Modes ...........................................................................................................................................................................

Control Mode ................................................................................................................................................................................

Security Feature ............................................................................................................................................................................

Logging .......................................................................................................................................................................................

Log Recall ....................................................................................................................................................................................

Analog Outputs .............................................................................................................................................................................

Events Management ......................................................................................................................................................................

Specifications .......................................................................................................................................................................................

Maintenance ........................................................................................................................................................................................

Electrode Conditioning and Maintenance .........................................................................................................................................

Pump Tube Replacement ...............................................................................................................................................................

Accessories ...........................................................................................................................................................................................

TABLE OF CONTENTS

This product is intended to maintain disinfectant and pH levels at a desired level in swimming pools. Remove the instrument and

accessories from the packaging and verify that no damage has occurred during shipping. Remove the protective film from meter. Please

contact your local Hanna Instruments Office if items are missing or damaged.

Two versions are available: In-line BL121-10 and Flow-cell BL121-20.

Each instrument is supplied with:

In-line BL121-10 Panel mounted Flow-cell BL121-20

• BL121 Swimming Pool Controller • BL121 Swimming Pool Controller

• HI1036-1802 Combined electrode (pH/ORP/

Temperature/Matching Pin)

• Panel mounted flow-cell

• Saddle for electrode 50 mm (1 pc.)

• HI1036-1802 Combined electrode (pH/ ORP/

Temperature/Matching Pin)

• Fittings for electrode

• Two valves for flow-cell connections with fittings and

tubing 10 m

• Injector 2 pcs. • Injector (2 pcs.)

• Saddle for injectors 50 mm (2 pcs.) • Saddle for injectors 50 mm (2 pcs.)

• Peristaltic pump tubing (2 pcs.) • Saddle for valves 50 mm (2 pcs.)

• Suction and injection tubing 10 m • Peristaltic pump tubing (2 pcs.)

• Aspiration filter (2 pcs.) • Suction and injection tubing 10 m

• Aspiration filter weight (2 pcs.) • Aspiration filter (2 pcs.)

• pH 7.01 sachets (3 pcs.) • Aspiration filter weight (2 pcs.)

• pH 4.01 sachets (3 pcs.) • pH 7.01 sachets (3 pcs.)

• 470 mV ORP test solution sachets (3 pcs.) • pH 4.01 sachets (3 pcs.)

• Power cable • 470 mV ORP test solution sachets (3 pcs.)

• User manual • Power cable

• User manual

POOL CONTROLLER CONTENTS

Note: Save all packing material until you are sure that the instrument works correctly. Any defective item must be returned in

its original packing.

The Swimming Pool Controller is an automatic system to measure and control levels of pH and free chlorine in a swimming pool or a

spa. The chlorine level is measured based on the ORP of REDOX principle. An increase of the ORP value correlates with an increase of the

level of free chlorine. pH and disinfectant testing are made together for more efficient disinfection and control. The efficacy of sanitizers,

such as chlorine, are dependent on a controlled pH value. The ORP value is the most consistent indicator of the sanitizing effectiveness

of the pool/spa or water treatment. Typically 650-750 mV at 7.2 pH indicates proper water treatment (all harmful bacteria are killed

in less than 1 s). pH and disinfectant testing are made using the HI1036-1802 combined electrode installed in-line or in flow-cell. To

prevent the ground loop effects from causing erratic readings and damage to the system the electrode has a matching pin considered

the “earth ground“ connection. The HI1036-1802 uses a Ag/AgCl reference with 3.5 M KCl. It was specially designed to detect the

broken electrode based on a shiffted ISO potential value. The ORP values are referenced to it.

It is the responsibility of the user/installer to determine an ideal setpoint for pH (e.g. 7,4) and ORP (e.g. 760 mv). The Swimming Pool

Controller will dose acid in case the pH of the water is above the pH setpoint and it will dose chlorine in case the ORP value is lower

than the ORP setpoint.

Although the Swimming Pool Controller is an automatic system, the user/installer should check the Swimming Pool Controller and verify

the levels of pH and free chlorine (in mg/L or ppm) in the pool, using a portable meter for pH and free chlorine.

All measurements and the main events are logged in the internal memory of the Pool Controller and can be viewed using the plot/record

log recall feature or exporting the data on a USB key for advanced data processing on a PC.

The Swimming Pool Controller should only be used in combination with liquid acid (e.g. sulfuric acid) and liquid chlorine (e.g. Sodium

hypochlorite).

Do not use chlorine tablets, granular chlorine or other non-liquid chlorine applications.

Do not use the Pool Controller on a pool utilizing electrolytic chlorine generation (salt electrolysis).

Do not add stabilizer (e.g. cyanuric acid) to the swimming pool or spa while using Pool Controller. To remove stabilizer from

the pool, the pool contents must be removed and the pool cleaned.

The main operating modes of Swimming Pool Controller are measurement, dosing, setup and logging. Follow this general outline of

steps to get you started. The following topics are expanded in the sections of this manual.

DESCRIPTION

1. Power Switch

2. Acid Dosing Pump

3. IN Acid

4. OUT Acid

5. Leakage holes

6. IN Chlorine

7. OUT Chlorine

8. Chlorine Dosing Pump

9. Cable Gland Seals

10. Probe Connector

11. Keyboard Area

12. USB port (host)

13. Liquid Crystal Display (LCD)

14. LED Area

15. LED Status

16. LED Service

17. Chlorine Pump Status LED

18. Acid Pump Status LED

Warning: Always disconnect power to instrument when making electrical connections.

Warning: Do not access larger rear panel. User Serviceable terminals are found in small sub panel only.

PRODUCT DIAGRAM

FRONT PANEL

CONTROLLER OVERVIEW

REAR SUB PANEL

Gland Seals for

Input/Output

wiring.

Sensor

Input

ANALOG

OUTPUTS

A01

4 - 20 mA OUT

A02

4 - 20 mA OUT

A03

4 - 20 mA OUT

DIGITAL INPUTS

ALARM RELAY

POWER INPUT

N Neutral

Protective Earth

L Line

Power Cable.

Do not run other cables

with the Power Cable.

CONNECTIONS, ALARM, OUTPUT AND POWER

CONTROLLER OVERVIEW

Warning! Always disconnect power to the Pool Controller when making electrical connections.

1. MENU Key - Access to manual pump control, pH/ORP/Temperature options and General setup

2. p/q Key - In menu mode scroll the menu items / adjust the settings.

In measurement mode changes the screen: three parameter screen (pH, ORP, and Temperature), single

parameter screen and plot display.

3. HELP Key - Enter/Exit Help Menu

4. Virtual Function Keys - Contextual functionality

The following tasks require mechanical, plumbing and electrical skills. These should be made by qualified personnel. Two configurations

are available:

In line configuration: - the probe is placed in saddle, mounted on pipe after the pool filter.

Flow-cell configuration: - the probe is mounted in the flow-cell close to the controller. The water flow is assured by tubes. In flow-cell

configuration the water circulation can be maintained while maintenance or calibration procedures are performed.

- When making selection for controller location, shield the controller from direct sunlight, dripping water and excess vibrations.

- Select locations for saddles

- The probe saddle should be located after the pool filter for the In-line installation. This must be within 2 m distance from the Pool

controller.

Caution: Use gloves, protective clothing and eye protection goggles when working with Injectors and Tubing.

Determine if a Flow detector, or alarm relays or analog outputs will be used before mounting Flow-cell panel or Pool

Controller, as access to rear sub panel is needed.

KEYPAD FUNCTION

CONTROLLER OVERVIEW

GENERAL INSTALLATION GUIDELINES

SETUP/INSTALLATION

BL120-203

POOL CONTROLLER INSTALL

SETUP/INSTALLATION

BL120-203

1. Connection for flow detector is optional.

2. Connection for low level sensor for acid tank is optional.

3. Connection for low level sensor for chlorine tank is optional.

4. Probe connector.

SETUP/INSTALLATION

POOL CONTROLLER INSTALL

With a Phillips head screwdriver remove the screw, after opening lift

the back cover and remove it.

To insert in place, attach the bottom part of the cover to the controller

and push to close. Tight the screw with the screwdriver.

BL120-10

BL120

SETUP/INSTALLATION

POOL CONTROLLER INSTALL

• Check the tanks level.

• Mount the probe saddle (only for in line configuration).

• Mount the injector saddle (see procedure).

• Connect the aspiration tubes between tanks and pumps input.

• Connect the dispensing tubing between pumps and injectors.

• Check the low level sensors functionality if enabled.

• Check the functionality of hold input.

• For accurate measurements calibrate the probe before use in the system.

BL120-10

BL120

Installation Guidelines

- Shield the controller from direct sunlight, dripping water and excess vibrations.

- Keep flow rate as constant as possible for optimum sensor operation.

- The sample analyzed should be representative of entire pool.

SETUP/INSTALLATION

Using a 29 mm (1.14173”) drill, make a hole on the desired location on the available pipe, where the saddle will be mounted

(50 mm; 63 mm; 75 mm available).

1. The saddle will be mounted above the hole in the following order:

- Put the upper saddle (5) part with seal (4) mounted around the hole.

- Put the lower part (2) of the saddle, together with inserted nuts (1) into

location.

- Insert a screw (7) through the hole with washer (6) mounted and screw into the

mounted nuts.

- Mount all the screws (7) by hand, then using a wrench screw them carefully

until tightened.

- Place the o-ring (8) provided , into the upper saddle.

Set saddle aside.

Saddles are used for the probe installation in an in-line installation, and for injector installations in both in-line and flow-cell

installations. Select pipe locations that are accessible with sensor cable length and tubing.

Saddle for Probe (in-line) Saddle threat size Drill size Min. - Max.

BL120-550 50 mm pipe 1 - ¼”thread 29 mm - 32 mm / 1.1417” - 1.2598”

BL120-563 63 mm pipe 1 - ¼”thread 29 mm - 32 mm / 1.1417” - 1.2598”

BL120-575 75 mm pipe 1 - ¼”thread 29 mm - 32 mm / 1.1417” - 1.2598”

Fittings for Valves for Flow-cell

connections

Saddle threat size Drill size Min. - Max.

BL120-450 50 mm pipe ½”thread 20 mm - 25.4 mm / 0.7874” - 1.0000”

BL120-463 63 mm pipe ½”thread 20 mm - 25.4 mm / 0.7874” - 1.0000”

BL120-475 75 mm pipe ½”thread 20 mm - 25.4 mm / 0.7874” - 1.0000”

Saddle for Injectors Saddle threat size Drill size Min. - Max.

BL120-250 50 mm pipe ½”thread 20 mm - 25.4 mm / 0.7874” - 1.0000”

BL120-263 63 mm pipe ½”thread 20 mm - 25.4 mm / 0.7874” - 1.0000”

BL120-275 75 mm pipe ½”thread 20 mm - 25.4 mm / 0.7874” - 1.0000”

SADDLE INSTALLATION

SETUP/INSTALLATION

2.Remove protective cap and

verify if the o-ring is in

place.

5.Insert the prepared probe

with the adapter and

screw it carefully into

the saddle. You are now

ready for connecting the

probe to the Swimming

Pool Controller.

3.Insert the nut on the

probe.

4.Screw carefully the adapter

on the probe. Do not to

damage the o-ring.

PROBE INSTALLATION

SETUP/INSTALLATION

1. Cut required length of suction/injection tubing to reach between peristaltic pump and reagent tanks.

2. Place the aspiration filter weight and the compression fitting nut on the tubing.

3. Place the end of tubing on the filter.

4. The compression fitting has to be screwed until secured on the filter.

5. Slide the compression fitting from the peristaltic pump inlet (up arrow) onto the tubing.

6. Place the aspiration filter weight over the filter.

7. Slide the end of tubing over the fitting of the peristaltic pump tubing.

8. Slide compression fitting up over tubing.

9. Tighten on fitting.

10. Repeat for second aspiration filter.

11. Place into appropriate reagent tank.

Aspiration filters are used in the reagent tanks to filter

debris from entering the tubing.

3. 4. 6.

INSTALLING ASPIRATION FILTERS

SETUP/INSTALLATION

1. Cut required length of suction/injection tubing to reach

between saddle for injector and outlet of peristaltic pump.

2. Place the compression fitting nut on the tubing.

3. Place the end of tubing on the injector.

4. The compression fitting has to be screwed until secured on

the injector.

5. Screw the injector in the saddle.

6. Slide compression fitting from peristaltic pump tubing onto

tubing.

7. Slide the end of tubing over fitting of peristaltic pump

tubing.

8. Verify correct pump is used.

9. Slide compression fitting over tubing.

10. Secure and tighten on fitting.

11. Repeat for second injector.

INSTALLING INJECTORS

Prepare the aspiration and dispensing valve assemblies like in the above drawing following the next steps:

1. Insert two o-ring’s (2) on the nipple (1) from both side.

2. Screw the nipple in the saddle (3).

3. Screw the valve (4) in the open end on the nipple screwed in the saddle until is tight and oriented in front to be operated.

4. Screw carefully the straight tube fitting (5) inside the valve taking care not to damage the o-ring.

5 Insert the tube (6) in the straight tube fitting (5).

FLOW-CELL INSTALLATION

SETUP/INSTALLATION

The flow cell will be mounted in the following order:

- Take one o-ring (4) and mount on the flow-cell cap (5). Insert these on flow-cell

tube (2) on the far end from lateral hole. Mount one flow-cell nut (3) by screwing

over the flow cell cap. Screw the straight tube fitting (6) in the hole of flow cell cap.

- Take the second o-ring (4) and mount on the flow-cell adapter (1). Insert these on

flow-cell tube (2) on the near end from lateral hole. Mount the second flow-cell nut

(3) by screwing over the flow-cell adapter.

- Screw the elbow tube fitting (7) into the lateral hole of the flow-cell tube (2).

- Place the o-ring (8) provided, into the flow-cell adapter (1).

Prepare the probe before inserting in the flow-cell.

- Remove protective cap and verify if the o-ring (10) is in place. Insert the nut (13) on

the probe. Screw the adapter carefully (12) on the probe. Do not damage the o-ring.

- Mount the collar (15) on the panel with the provided screw.

- Insert the assembled flow-cell into the collar (15) and secure it by closing.

- Insert the prepared electrode (11) into the flow-cell, carefully, not damaging the

o-ring, until the adapter (12) mounted on the electrode is inside the flow-cell.

- Screw the nut (11) until the electrode and flow-cell assembly is secured.

- Insert the tube (14a) from the aspiration valve already mounted on the saddle.

- Insert the tube (14b) from the dispensing valve already mounted on the saddle.

TEST MEASUREMENT

Rinse the electrode tip with distilled water. Immerse the tip (bottom 4 cm / 1½”) in

the sample and stir gently for approx. 30 seconds. For a faster response and to avoid

cross contamination of the samples, rinse the electrode tip with the solution to be

tested before taking your measurements.

SETUP/INSTALLATION

The controller menu is grouped into five categories:

• Manual/Auto pump control

• pH Options (CAL, Setup, GLP)

• ORP Options (CAL, Setup, GLP)

• Temperature Options (Setup)

• General

Manual/Auto Pump Control

Each pump can be set to MANUAL control by selecting the On 10s/OFF options.

When On 10s is selected the pump runs continuously for 10 s. To increase the time up to 90 seconds press the Add 10s button. The

remaining time is displayed next to the selected pump in the menu. Pressing the OFF button will stop the pump. To return to the

automatic mode select AUTO for each pump. In Auto mode the pumps will be activated when the measurement exceeds the set point

value.

pH Options

Option Choices / Resolution Default Note

Dosing Type Acid/Base Acid Use the correct option according to the tank content.

Set Point 6.00 to 8.00 pH / 0.01pH 7.2 pH

Use to set the expected pH level in pool. When the pH pump is

activated, the pump LED flashes.

Proportional band 0.1 to 2.0 pH / 0.1 pH 2.0 pH

pH regulated time proportional band. Proportions the time off

and time on within the band. The pump is on continuously at the

set point value with added band.

pH Flow rate 0.5 to 3.5 l/h / 0.1 l/h 2.2 L/h pH dosing pump flow rate

Overtime 1 to 120 min / 1min 30 min Maximum allowed dosing time in automatic mode

Alarm High

(pH Low+0.1) to 14.0 pH

Acid / 0.1 pH

8.0 pH

Minimum pH value that triggers the alarm high event if it persists more

than 5 seconds*. Status and service LED will activate and pH pump will

be disabled.

Alarm High

 Enable

 Disable

Disable Enable/Disable the pH high alarms

Alarm Low

0.0 to (pH High-0.1) pH

Acid / 0.1 pH

6.0 pH

Maximum pH value that triggers the alarm low event if it persists

more than 5 seconds**. Status and service LED will activate and pH

pump will be disabled.

Alarm Low

 Enable

 Disable

Disable Enable/Disable the pH low alarms

Warnings and Errors

 Enable

 Disable

Disable Enable/Disable the warnings and errors related to pH events

Alarm Activates

Relay

 Enable

 Disable

Disable Enable/Disable the relay control for pH events (see page 6).

Startup Dosing

Delay

1 to 180 min / 1 min 2 min The delay to start dosing at power-on

Analog Out Disabled, AO1, AO2, AO3 Disabled Assign an analog output to pH reading

Max. Analog Out 1 to 14 pH / 1 pH 14 pH High pH limit assigned to 20 mA

Min. Analog Out 0 to 13 pH / 1 pH 0 pH Low pH limit assigned to 4 mA

Acid Tank Input

 Enable

 Disable

Disable Enable/Disable the acid tank low level input

* The minimum adjustable value of alarm high is related to alarm low value if it’s enabled.

** The maximum adjustable value of alarm low is related to alarm high value if it’s enabled.

CONTROLLER MENU

SETUP/INSTALLATION

ORP Options

Option Choices / Resolution Default Note

Set Point 200 to 900 mV / 1 mV 700 mV Use to set the expected ORP level in pool.

Proportional band 10 to 200 mV / 1 mV 100 mV

ORP regulated time proportional band. Proportions the

time off and time on within the band. The pump is on

continuously at the set point value with added band.

Flow rate 0.5 to 3.5 l/h / 0.1 L/h 2.2 L/h ORP dosing pump flow rate

Overtime 1 to 120 min / 1 min 30 min Maximum allowed dosing time in continuous mode

Alarm High (Low+1) to 1000 mV / 1 mV 900 mV

Minimum ORP value that triggers the alarm high event if

it persists more than 5 seconds*. Status and Service LED’s will

activate and Cl

pump will be disabled.

Alarm High

 Enable

 Disable

Disable Enable/Disable the ORP high alarms

Alarm Low 0 to (High-1) mV / 1 mV 200 mV

Maximum ORP value that triggers the alarm low event if it

persists more than 5 seconds**. Status and Service LED’s will

activate and Cl

pump will be disabled.

Alarm Low

 Enable

 Disable

Disable Enable/Disable the ORP low alarms

Warnings and Errors

 Enable

 Disable

Disable

Enable/Disable the warnings and errors related to ORP

events

(see page 6).

Alarm Activates Relay

 Enable

 Disable

Disable Enable/Disable the relay control for ORP events

Startup Dosing Delay 1 to 180 min / 1 min 5 min The delay to start dosing at power-on

Analog Out Disabled, AO1, AO2, AO3 Disabled Assign an analog output to ORP reading

Max. Analog Out -1999 to 2000 mV / 1 mV 2000 mV High ORP limit assigned to 20 mA

Min. Analog Out -2000 to 1999 mV / 1 mV -2000 mV Low ORP limit assigned to 4 mA

Tank Input

 Enable

 Disable

Disable Enable/Disable the Cl

tank low level input

Temperature Options

Option Choices / Resolution Default Note

Alarm High

(Low+0.1) to 100.0 °C / 0.1 °C

(Low+0.1) to 212.0 °F / 0.1 °F

50.0 °C

122.0 °F

Minimum Temperature value that triggers the alarm high

event if persist more than 5 seconds*

Alarm High

 Enable

 Disable

Disable Enable/Disable the temperature high alarms

Alarm Low

0.0 to (High-0.1) °C / 0.1 °C

32.0 to (High-0.1) °F / 0.1 °F

10.0 °C

49.9 °F

Maximum Temperature value that triggers the alarm low

event if persist more than 5 seconds**

Alarm Low

 Enable

 Disable

Disable Enable/Disable the temperature low alarms

Warnings and

Errors

 Enable

 Disable

Disable

Enable/Disable the warnings and errors related to

Temperature events

Option Choices / Resolution Default Note

Alarm Activates

Relay

 Enable

 Disable

Disable Enable/Disable the relay control for Temperature events

SETUP/INSTALLATION

* The minimum adjustable value of alarm high is related to alarm low value if it’s enabled.

** The maximum adjustable value of alarm low is related to alarm high value if it’s enabled.

Unit °C / °F °C Temperature measurement unit

Analog Out Disabled, AO1, AO2, AO3 Disabled Assign an analog output to Temperature reading

Max. Analog Out

-4.0 °C to 105.0 °C / 0.1 °C

24.8 to 221.0 °F / 0.1 °F

105.0 °C

221.0 °F

High Temperature limit assigned to 20 mA

Min. Analog Out

-5.0 °C to 104.0 °C / 0.1 °C

23.0 to 219.2 °F / 0.1 °F

-5.0 °C

23.0 °F

Low Temperature limit assigned to 4 mA

General Options

Option Choices Default Note

Time Current set time. Option to change the current time

Time Format

hh:mm:ss 24h

hh:mm:ss 12h

hh:mm:ss 24h Option to change the current time format

Date Current set date. Option to change the current date

Date Format

yyyy-mm-dd,

dd-mm-yyyy,

mm-dd-yyyy,

yyyy/mm/dd,

dd/mm/yyyy,

mm/dd/yyyy

yyyy-mm-dd Option to change the current date format

Key Beep

 Enable

 Disable

Disable Enable/Disable the Audible tone for key pressing

Alarms and Errors

Beep

 Enable

 Disable

Enable

When Enabled a Audible tone will be generated when a

new event is triggered.

Decimal Point / Comma Point Decimal separator selection

LCD Contrast 0 % to 100 % / 1 % 50 % Display contrast

LCD Backlight 0 % to 100 % / 1 % 50 % Display backlight contrast

Language English User interface language

Restore Factory

Settings

All user interface settings will be restored to default.

Controller Info Controller Firmware version, Language, Serial Number

Probe Info Model, Firmware version, Serial Number, Factory Calibration Status

Controller Password

 Enable

 Disable

Disable When Enabled a lock icon is displayed

Controller ID 0 to 9999 / 1 1234 Setting used to identify the controller

Hold Input

 Enable

 Disable

Disable Enable/Disable the recirculation pump HOLD input

Events Timeout 0 to 60 min / 1 min 0 min.

The timeout value after an High/Low alarm warning

became alarm.

* The minimum adjustable value of alarm high is related to alarm low value if it’s enabled.

** The maximum adjustable value of alarm low is related to alarm high value if it’s enabled.

SETUP/INSTALLATION

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Hanna Instruments BL121-10,BL121-20 Owner's manual

Brand: Hanna Instruments

Model: BL121-10,BL121-20

Category: Measuring, testing & control

Type: Owner's manual

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Hanna Instruments BL121-10,BL121-20 Owner's manual

Hanna Instruments BL121-10,BL121-20 Owner's manual

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