User manual HANNA INSTRUMENTS BL 931700

[. . . ] These instruments are in compliance with the directives. SPECIFICATIONS Range 0. 00 to 14. 00 pH Resolution 0. 01 pH Accuracy (@ 20°C/68°F) ±0. 02 pH Typical EMC Deviation ±0. 10 pH / ±0. 10 mA Calibration Manual, through Offset & Slope trimmers Dosing Contact Maximum 2A (fuse protected), 250 Vac, 30 Vdc Dosing Selection Acid or Alk, selectable on the back panel Contact Open=Acid dosage=Relay ON if Measure > Setpoint Contact Close=Alk dosage=Relay ON if Measure < Setpoint Setpoint Adjustable, from 0 to 14 pH Overtime Adjustable, typically from 5 to approx. 30 minutes Recorder Output 4 to 20 mA, accuracy ±0. 20 mA, 500 maximum load Power Consumption 10 VA Installation Category II Power supply: External (fuse protected) BL931700-0 12 Vdc BL931700-1 115/230 Vac ; 50/60Hz Dimensions 83 x 53 x 99 mm (3. 3x2. 1x3. 9") ACCESSORIES pH CALIBRATION SOLUTIONS HI 7004M/L pH 4. 01 buffer solution, 230/500 mL bottle HI 7006M/L pH 6. 86 buffer solution, 230/500 mL bottle HI 7007M/L pH 7. 01 buffer solution, 230/500 mL bottle HI 7009M/L pH 9. 18 buffer solution, 230/500 mL bottle HI 7010M/L pH 10. 01 buffer solution, 230/500 mL bottle OTHER SOLUTIONS HI 70300M/L Electrode storage solution, 230/500 mL bottle HI 7061M/L Electrode general cleaning solution, 230/500 mL HI 7073M/L Protein cleaning solution, 230/500 mL bottle HI 7074M/L Inorganic cleaning solution, 230/500 mL bottle HI 7077M/L Oil & Fat cleaning solution, 230/500 mL REFILLING ELECTROLYTE SOLUTIONS (50 mL, 4 pcs. ) HI 7071 3. 5M KCl+AgCl, for single junction electrodes HI 7072 1M KNO3 solution HI 7082 3. 5M KCl, for double junction electrodes pH ELECTRODES HI 1002/5 BNC connector, double junction, plastic-body w/external thread & 5 m (16. 5') cable HI 1090T Screw connector, double junction, glass-body with external thread HI 1110S Screw connector, single junction, glass-body HI 1210T Screw connector, double junction, plastic-body with external thread HI 2114P/2 BNC connector, double junction, plastic-body with 2 m (6. 6') cable HI 1210B/5 BNC connector, double junction, plastic-body, with 5 m (16. 5') cable HI 2910B/5 BNC connector, double junction, plastic-body, with built-in amplifier and 5 m (16. 5') cable EXTENSION CABLES, SCREW TO BNC CONNECTOR HI 7855/5 Extension cable 5 m (16. 5') long HI 7855/10 Extension cable 10 m (33') long OTHER ACCESSORIES BL PUMPS Dosing Pumps (flow rate from 1. 5 to 20LPH) HI 6050 Submersible electrode holder, 60 cm (24") HI 6051 Submersible electrode holder, 110 cm (43") HI 6054B Electrode holder for in-line applications HI 6054T Electrode holder for in-line applications HI 710005/6 12 Vdc power adapter, US/European plug HI 731326 Calibration screwdriver (20 pcs) HI 740146 Mounting brackets HI 7871 Level Controller (min and max) HI 7873 Level Controller (min, max and overflow) PRELIMINARY EXAMINATION Remove the instrument from the packing material and examine it carefully. If any damage has occurred during shipment, immediately notify your Dealer or the nearest Hanna Customer Service Center. Each meter is supplied with: · Mounting brackets · Instruction manual Note: Conserve all packing material until the instrument has been observed to function correctly. [. . . ] Connections and wiring to electrode, power supply, contacts and external recorders are made via the terminal blocks on the rear panel. The meters are equipped with a BNC socket and accept input from conventional pH electrodes. Other features include: 4-20 mA output, overtime control system, selection of dosing direction (Acid/Alk), contact for external control and disabling of dosing action, multi-colour LED for indicating if the meter is in measurement/dosing/ alarm condition, possibility to set (Off-Auto-On switch) dosing action mode. Two models are available: · BL 931700-0 powered at 12 Vdc · BL 931700-1 powered at 115 or 230 Vac ASSEMBLING VIEW FUNCTIONAL DESCRIPTION Front panel Rear panel OPERATIONS REAR PANEL CONNECTIONS Terminals #1, #2 and #3: Electrode · Connect a pH-electrode to the meter BNC plug (#1). · To benefit from the differential input, connect the proper electrode wire (if available) or a cable with a potential matching pin (grounding bar) to the relevant terminal (#3) on the rear panel. Note: When the Matching Pin can not be immersed together with the pH electrode in the solution, disable the differential input by shorting terminals #3 (Matching Pin) and #2 (Electrode Reference) with a jumper wire. Terminals #4: Dosing selection · For acid dosage, leave the circuit open. Terminals #5: 4-20 mA Output · These output terminals are used for connecting a recorder. The output is from 4 to 20 mA and is proportional to the measured pH value. Terminals #6: Power Supply · Model BL931700-0: connect the 2 wires of a 12 Vdc power adapter to the terminals +12 Vdc and GND. · Model BL931700-1: connect a 3-wire power cable to the terminals while paying attention to the correct earth (PE), line (L) and neutral (N1 for 115 V or N2 for 230 V) contacts. Terminals #7: Dosing Contact · This contact drives the dosing system, accordingly to the selected setpoint and dosing direction: · if "Acid" dosage is set, the relay is ON and dosing activated if measured value is higher than setpoint; · if "Alk" dosage is set, the relay is ON and dosing activated if measured value is lower than setpoint. Note: The setpoint has a typical hysteresis value comparable to the meter accuracy. Terminals #8: External Disabling Contact · This is a normally open contact and can be used for example for connecting a level controller. · When the contact is closed, any dosing action stops, the LED indicator on the front panel will blink Red and the LCD will show the "HALT" warning message. Note: If the OFF/Auto/ON switch is in ON position, the dosing action will not stop, even if the external disablig contact is closed. Switch for selecting dosing mode: · OFF = dosing disabled · Auto = automatic dosage, depending on setpoint value and dosing selection · ON = dosing always active 3. "SLOPE" trimmer to adjust the pH slope value during calibration 7. "OFFSET" trimmer to adjust the pH offset value during calibration 8. 3-colour LED indicator: · Green = meter in measurement mode · Orange/Yellow = dosing in progress · Red, blinking = indicates an alarm condition 5. [. . . ] Adjust the OFFSET trimmer until "7. 01 pH" is displayed on the LCD. Rinse electrode and Matching Pin (if available), immerse them in pH 4. 01 (or pH 10. 01) buffer solution, shake briefly and wait for reading to stabilize. Adjust the SLOPE trimmer until "4. 01 pH" (or "10. 01 pH") is displayed on the LCD. SETPOINT Press the "SET" key: the display will show the default or previously adjusted value, together with the "SET" indication. [. . . ]