User manual HANNA INSTRUMENTS HI 98143

[. . . ] pH offset calibration trimmer pH slope calibration trimmer BNC connector for pH electrode pH electrode (not included) Potential matching pin (not included) Conductivity probe (not included) 12-24 Vdc power adapter (not included) pH output terminals EC output terminals Power supply terminals EC slope calibration trimmer EC offset calibration trimmer Isolated Output (pH and EC) HI 98143-01 0-1 V HI 98143-04 0-4 V HI 98143-20 4-20 mA (passive) HI 98143-22 4-20 mA (active) Calibration pH EC Manual, 2 point, through trimmers offset and slope trimmers 0 and 5 mS/cm trimmers www. hannainst. com Temperature Compensation (EC only) Automatic from 0 to 60°C with ß=2%/ºC pH Electrode EC Probe Casing Power Supply Environment Dimensions Weight HI 1001 pH electrode (suggested) and HI 1283 matching pin (not included) HI 3001(not included) with cell constant 2. 1 IP54 12-24 Vdc 0 to 50°C (32 to 122°F); RH max 95% 160 x 105 x 31mm (6. 3 x 4. 1 x 1. 2") 280 g (9. 9 oz. ) WARRANTY These instruments are warranted for two years against defects in workmanship and materials when used for its intended purpose and maintained according to instructions. Electrodes and probes are warranted for a period of six months. This warranty is limited to repair or replacement free of charge. Damages due to accident, misuse, tampering or lack of prescribed maintenance are not covered. [. . . ] Avoid touching this glass bulb all the time. The metal band at the end of the EC probe is sensitive to electrostatic discharges. Avoid touching this metal band all the time. During operation, ESD wrist straps should be worn to avoid possible damage to the electrode by electrostatic discharges. Any variation introduced by the user to the supplied equipment may degrade the instrument's EMC performance. To avoid electrical shock, do not use this instrument when voltages at the measurement surface exceed 24 Vac or 60 Vdc. To avoid damages or burns, do not perform any measurement in microwave ovens. IST98143 07/05 Hanna Instruments reserves the right to modify the design, construction and appearance of its products without advance notice. CONNECTIONS pH ELECTRODE CONNECTION · Connect the pH electrode to the BNC connector (#3) and the Matching pin to the PM terminal. EC PROBE CONNECTION · Probe wires are colour coded for an easy installation: Terminal Probe Wire Color EC probe #1 Green EC probe #2 White EC probe #3 Red EC probe #4 Blue Temperature sensor #1 Brown Temperature sensor #2 Grey Shield Yellow-green POWER CONNECTION · Connect a 2-wire cable to the 12-24 Vdc power source, while paying careful attention to its polarity. OUTPUT CONNECTION · Connect a 2-wire cable from the pH output terminals (#8) to the pH receiver, and another 2-wire cable from the EC output terminals to the EC receiver, while paying attention to the polarity. Outputs vary proportionally to the measured pH and EC values in the range of 0-1 V (for HI 98143-01), 0-4 V (for HI 98143-04) or 4-20 mA (for HI 98143-20 and HI 98143-22). · For continuous flow-thru measurements, the probes can be easily installed in any standard ½" pipe tee. Use Teflon ® tape between the probe and the pipe to ensure a leak free joint. Take care not to overtighten it, as excessive pressures can cause probe damage. CALIBRATION For better accuracy, frequent calibration of the instrument is recommended. Calibration should also be performed whenever the pH electrode is replaced, after testing aggressive chemicals or at least once a month. OUTPUT HI 98143-01 and HI 98143-04: The input is isolated from output and power supply. The outputs aren't isolated from power supply. pH CALIBRATION Pour small quantities of pH 7. 0 (HI 7007) and pH 4. 0 (HI 7004) or pH 10. 0 (HI 7010) solutions into two clean beakers. Use pH 4. 0 solution as second calibration buffer if you are measuring acidic samples, while pH 10. 0 solution is recommended for alkaline solutions. · Connect a multimeter to the pH output terminals and set it to voltage (HI 98143-01 and HI 98143-04) or current (HI 98143-20 and HI 98143-22) readings. Rinse and immerse pH electrode and matching pin (if used) in pH 7. 0 buffer. Stir gently and wait for the reading to stabilize. · Adjust the pH offset calibration trimmer with a small screwdriver until the multimeter displays: 500 mV for HI 98143-01 2. 00 V for HI 98143-04 12. 00 mA for HI 98143-20 and HI 98143-22. · Rinse and immerse pH electrode and matching pin (if used) in pH 4. 0 (or pH 10. 0) buffer and stir gently. · Wait a couple of minutes and then adjust the pH slope trimmer until the multimeter shows the value of the second buffer: model pH 4 buffer pH 10 buffer HI 98143-01 286 mV 714 mV HI 98143-04 1. 14 V 2. 86 V HI 98143-20 8. 57 mA 15. 43 mA HI 98143-22 8. 57 mA 15. 43 mA The pH calibration is now complete. Note: To prevent any damage, disconnect the pH electrode before turning the meter off. HI 98143-20: The output must be feed by an external power supply, which can be the same used for the meter. Carefully follow the first connection diagram. [. . . ] The EC calibration is now complete. OPERATIONAL GUIDE · HI 98143 may be wall-mounted at any convenient location close to the measurement site. To minimize thermal drifts due to extreme temperature fluctuations, it is recommended to protect transmitter inside a casing. Connect probes, power supply and receiving devices to the HI 98143 as explained in the previous section. Remove the protective cap from the pH electrode and immerse it at least 4 cm into the sample. [. . . ]