Hanna Instruments BL 7916 User manual

Instruction Manual

BL 7916 - BL 7917

pH and ORP

Controller &

Dosing Pump

http://www.hannacan.com TheseInstrumentsarein

Compliancewith theCE Directives

ISO 9000 Certified

Company since 1992

DearCustomer,

Thank you for choosing a Hanna product.

Please read this instruction manual carefully before using the pump.

This manual will provide you with the necessary information for a

correct use of the pump, 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].

These instruments are in compliance with the directives

EN50081-1 and EN 50082-1.

TABLE OF CONTENTSTABLE OF CONTENTS

TABLE OF CONTENTS

PRELIMINARY EXAMINATION........................................................3

GENERAL DESCRIPTION ................................................................4

FLOW RATE CHART.......................................................................5

FUNCTIONAL DESCRIPTION BL 7916 ............................................6

FUNCTIONAL DESCRIPTION BL 7917 ............................................7

SPECIFICATIONS...........................................................................8

VALVE / HOSE ASSEMBLY DIAGRAM.............................................9

MECHANICAL DIMENSIONS ........................................................10

INSTALLATION...........................................................................11

OPERATIONAL GUIDE .................................................................18

pH CALIBRATION.......................................................................22

TROUBLESHOOTING GUIDE ........................................................23

MAINTENANCE ........................................................................... 24

ELECTRODE CONDITIONING AND MAINTENANCE...........................26

TAKING REDOX MEASUREMENTS.................................................30

CHEMICAL COMPATIBILITY GUIDE................................................32

ACCESSORIES.............................................................................34

WARRANTY ................................................................................ 41

OTHER PRODUCTS FROM HANNA...............................................42

CE DECLARATION OF CONFORMITY..............................................43

PRELIMINARY EXAMINATIONPRELIMINARY EXAMINATION

PRELIMINARY EXAMINATION

Remove the pump from the packing material and examine it carefully

to make sure that no damage has occurred during shipping. If there

is any noticeable damage, notify your Dealer.

Each pump is supplied complete with:

• 7 m (23') LPDE suction and discharge tubing

• Powercord

• Instruction manual

Note: Save all packing material until you are sure that the pump

functions correctly. Any defective item must be returned in the

original packaging together with the supplied accessories.

READTHEINSTRUCTIONSATTENTIVELY

BEFORE INSTALLING OR OPERATING YOUR PUMP

The BL electronic dosing pumps are easy to use. We recommend,

however, that you read the entire manual before using the pump.

Familiarity with the features and controls of the unit will give you a

better idea of the dosing potential and help reduce operator errors.

Please operate the pump only as directed in the instruction manual.

Follow all general safety guidelines during operation.

Remember:electricaldevices are potentiallyhazardous.Checkthatthe

voltage of the installation matches the voltage indicated on the

specification label on the back of the pump.

Note: It is the responsibility of the user to install and ground the

pump properly; it is highly recommended to install an external

switch.

Each pump is protected by a 250V fuse that is located together with

1 spare in a drawer on the power socket under the pump.

Always store chemicals in safe, out of reach places. Follow the

directionsforusewith eachchemical.Donotassumechemicalsarethe

same because they look alike. Hanna Instruments cannot be held

responsible for the misuse of chemicals or the pump.

Always wear protective clothing (gloves and safety glasses) when

working near chemical dosing pumps. When pumping chemicals,

make sure all tubes are securely attached to the fittings. It is

recommended that tubing is shielded to prevent possible injury in

case of rupture or accidental damage.

Avoid using a pipe wrench or pliers on plastic parts and connectors.

These are best tightened with an open end or crescent wrench. Avoid

overtightening these parts as this could cause damage to the seats

and threads.

If a hose is used, it should be securely fastened to columns, walls,

braces, etc. This will ensure that the hose connection will remain tight

and leak free. Shield the hose from direct sunlight. Sunlight can

cause an autocatalytic reaction with some chemicals and weaken the

hosewalls.

The arrow on the pump head indicates the direction of chemical flow

and should always point upwards (vertically). Never position the

pump horizontally with suction and discharge valves horizontal.

Locate the pump in an area out of the reach of children and pets.

All pumps undergo stringent tests to ensure that they comply with

their stated specifications and are calibrated at the maximum rated

pressure.

GENERAL DESCRIPTIONGENERAL DESCRIPTION

GENERAL DESCRIPTION

The BL 7916 and BL 7917 Control/Pump System offer respectively a

pH and ORP monitoring system with proportional control of a

diaphragm pump and an LCD readout.

Features include:

• Two advanced instruments in one compact unit

• Proportional control for precisely maintained set-points

• Rugged construction with a one-piece casing and a transpar-

ent cover to protect controls and terminals

• Chemically resistant non-clogging pump head and superior

materials for all components in contact with the chemicals

being dosed (see page 32 for details)

• Convenient installation with all controls on front panel

• A solenoid-driven pump

• Automatic overheat protection and a built-in LCD display

• Alarm output: the alarm of the BL 7916 will be activated if

the measured pH value is 2 pH units higher or lower than the

setpoint. BL7917's alarm will activate if the mV value is

200mV higher or lower than the setpoint.

• Auxiliary dosing contacts. This will drive other equipment such

as mixers, priming pumps, etc.

Unplug the instrument from the power supply before

replacing the fuse or making any electrical connections.

FLOW RATE CHARTFLOW RATE CHART

FLOW RATE CHART

The following chart shows the inverse relationship between flow rate

and pressure.

The table below shows typical reduction of the flow rate with an

increase of pressure. The pump supplied with the system has a

capacity of 13.3LPH (3.5 GPH) at 0.5 BAR (7.4 PSI).

BL 7916 / BL 7917

FLOW/PRESSURE

BAR(PSI) LPH (GPH)

0.5(7.4)

1.0(14.7)

2.0(29.4)

3.0(44.1)

4.0(58.8)

13.3(3.46)

11.7(3.04)

10.1(2.63)

9.0(2.33)

7.8(2.03)

FUNCTIONAL DESCRIPTION BL 7916FUNCTIONAL DESCRIPTION BL 7916

FUNCTIONAL DESCRIPTION BL 7916

1. Discharge Valve Assembly

2. Pump head

3. Suction Valve Assembly

4. Hose

5. Liquid Crystal Display

6. Offset Calibration Trimmer

7. Setpoint Adjustment Trimmers (FINE and COARSE)

8. Slope Calibration Trimmer

9. Acid/Base Selection Switch

10. Display Mode Selection Switch (SET or MEASURE)

11. TerminalConnections

12. BNC Connector for pH electrode

13. Overheating LED

14. Power Socket and Fuse Holder

15. Cable Glands

Unplug the instrument from the power supply before

replacing the fuse or making any electrical connections.

FUNCTIONAL DESCRIPTION BL 7917FUNCTIONAL DESCRIPTION BL 7917

FUNCTIONAL DESCRIPTION BL 7917

Unplug the instrument from the power supply before

replacing the fuse or making any electrical connections.

1. Discharge Valve Assembly

2. Pump head

3. Suction Valve Assembly

4. Hose

5. Liquid Crystal Display

6. Setpoint Adjustment Trimmers (FINE and COARSE)

7. Reduction/Oxidation Selection Switch

8. Operating Mode Selection Switch (SET or MEASURE)

9. TerminalConnections

10. BNC Connector for ORP electrode

11. Overheating LED

12. Power Socket and Fuse Holder

13. Cable Glands

Range -999to+999mV

Resolution 1mV

Accuracy(@20°C/68°F) ±5mV

TypicalEMCDeviation ±6mV

Input High Impedance 10¹² Ohm

Dosage Proportional:oxidizing or reducing. User selectable

DosingContact Isolated,2A,Max.240V,resistiveload,1,000,000strokes

AlarmContact Isolated,2A,Max.240V,resistiveload,1,000,000strokes

RecorderOutput 4 to 20mA

PowerSupply 230V±15% 115V±15%

50/60Hz(40W) 50/60Hz(40W)

Environment 0to50°C(32to122°F);

max85%RHnon-condensing

Dimensions W x D x H: 221 x 142 x 181 mm (8.7 x 5.6 x 7.1)

Weight Approximately 5 Kg (11 lb.)

Range 0.00to14.00pH

Resolution 0.01pH

Accuracy (@20°C/68°F) ±0.01pH

TypicalEMCDeviation ±0.1 pH

Input High Impedance 10¹² Ohm

Dosage Proportional: acid or basic. User selectable

DosingContact Isolated,2A,Max.240V,resistiveload,1,000,000strokes

AlarmContact Isolated,2A,Max. 240V, resistiveload,1,000,000 strokes

Calibration Offset: ±1 pH by offset trimmer

Slope: 85 to 115% by slope trimmer

RecorderOutput 4to20mA

PowerSupply 230V±15% 115V±15%

50/60Hz (40W) 50/60Hz (40W)

Environment 0 to 50°C (32 to 122°F);

max 85% RH non-condensing

Dimensions WxDxH:221x142x181mm(8.7x5.6x7.1)

Weight Approximately 5 Kg (11 lb.)

BL7916D BL7916U

SPECIFICATIONSSPECIFICATIONS

SPECIFICATIONS

BL7917D BL7917U

VALVE / HOSE ASSEMBLY DIAGRAMVALVE / HOSE ASSEMBLY DIAGRAM

VALVE / HOSE ASSEMBLY DIAGRAM

NECK

MECHANICAL DIMENSIONSMECHANICAL DIMENSIONS

MECHANICAL DIMENSIONS

The Controller/Pump series of instruments are enclosed in a modular

housing for maximum protection. The dimensioned illustrations show

the layout of the Controller/Pumps and how they utilize the one-piece

polypropylene, injection-molded housing. Since there are no joints or

screws holding different sections of the housing together, the case is

extremely rugged and sturdy.

BOTTOM VIEW

FRONTVIEW

99mm

3.90"

110mm

4.33"

142mm

5.60"

5mm

0.19"

129mm

5.08"

17mm

.67"

55mm

2.16"

181mm

7.13"

110mm

4.33"

204mm

8.03"

164mm

6.45"

221mm

8.70"

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