Hanna-instruments BL 7916 Bedienungsanleitung

Instruction ManualBL 7916 • BL 7917pH and ORPMeasuring & DosingSystemwww.hannainst.com

1918TERMINAL CONNECTIONS BL 7917Pt100 (for BL 7916 only)A 2-wire Pt100 can be connected to provide automatic temperaturecompensation of the pH measure

2120SETPOINT ADJUSTMENTS• Move the display selector switch to SET.• With a small screwdriver adjust the SET COARSE trimmer todisplay a value close to

2322TROUBLESHOOTING GUIDEELECTRICALThe pump does not operate when turned ON:• Check the power supply and connections. Voltage should bebetween 100 - 1

2524SCHEDULED MAINTENANCEAfter 50 hoursTight the pump head screws with a torque force of 2.5 Nm (22"lbf).After 12 monthsIt is recommended to repl

2726These bubbles can be removed by "shaking down" the electrode asyou would do with a glass thermometer.If the bulb and/or junction are dry

2928• Slow Response/Excessive Drift: Soak the tip in Hanna Solu-tion HI 7061 for 30 minutes, rinse thoroughly in distilled waterand then follow the Cl

3130Reducing pretreatment: immerse the electrode in HI 7091 solution fora few minutes.Oxidizing pretreatment: immerse the electrode in HI 7092 solutio

3332Hydrogen Sulfide AqueousSolutionHypochlorous AcidKeroseneLactic AcidLard OilLauric AcidLead AcetateLinoleic AcidLinseed OilLithium SaltsMagnesium

3534HI 721101 Pump head, O-Ring, 6 screws and washersHI 721106 Pump head, Large PTFE Diaphragm, AluminumPiston and Aluminum DiskpH CALIBRATION SOLUTIO

3736HI 3130B/3 BNC connector, 3 m (9.9') cable, Pt, glass-body withexternal threadHI 3110T Screw connector, external PG13.5 thread, doublejuncti

32PRELIMINARY EXAMINATIONRemove the pump from the packing material and examine it carefullyto make sure that no damage has occurred during shipping. I

CE DECLARATION OF CONFORMITYHanna Instruments reserves the right to modify the design,construction and appearance of its products without advancenotic

MAN7916R307/05SALES AND TECHNICAL SERVICE CONTACTSAustralia:Tel. (03) 9769.0666 • Fax (03) 9769.0699China:Tel. (10) 88570068 • Fax (10) 88570060Egypt:

54FLOW RATE CHARTThe following chart shows the inverse relationship between flow rateand pressure.The table below shows typical reduction of the flow

76FUNCTIONAL DESCRIPTION BL 7917Unplug the instrument from the power supply beforereplacing the fuse or making any electrical connections.1. Discharge

98VALVE / HOSE ASSEMBLY DIAGRAMNECKRange -999 to +999 mVResolution 1 mVAccuracy (@20°C/68°F) ±5 mVTypical EMC Deviation ±6 mVInput Impedance 10¹² OhmD

1110INSTALLATIONMaterials Needed• LDPE hose (7 meter/22 feet) (included) or other type of tubing(PTFE, for example) more suitable for a specific appli

1312Probe connectionsConnect the pH/ORP electrode to the BNC socket of the pump.The foot valve assembly (HI 721005)should always hang vertically and n

1514• Repeat the same installation procedure for the hose connectionson the discharge end with the injection assembly (HI 721004)• Secure the hose so

1716Downhill InstallationSuggested installation when pumping from one container to another,each at different levels and with only nominal pressure.STA