User manual HANNA INSTRUMENTS PH 500

[. . . ] pH 500/mV 600 Series Panel-mounted, Microprocessor-based Process pH/mV Meters Instruction Manual Dear Customer, Thank you for choosing a Hanna Product. This instruction manual has been written for the following products: pH 500111 pH Controller with single setpoint, ON/OFF control, analog output pH 500112 pH Controller with single setpoint, ON/OFF control, RS232 output pH 500121 pH Controller with single setpoint, proportional and ON/OFF control, analog output pH 500122 pH Controller with single setpoint, proportional and ON/OFF control, RS232 output pH 500211 pH Controller with dual setpoint, ON/OFF control, analog output pH 500212 pH Controller with dual setpoint, ON/OFF control, RS232 output pH 500221 pH Controller with dual setpoint, proportional and ON/OFF control, analog output pH 500222 pH Controller with dual setpoint, proportional and ON/OFF control, RS232 output mV 600111 ORP Controller with single setpoint, ON/OFF control, analog output mV 600112 ORP Controller with single setpoint, ON/OFF control, RS232 output mV 600121 ORP Controller with single setpoint, proportional and ON/OFF control, analog output mV 600122 ORP Controller with single setpoint, proportional and ON/OFF control, RS232 output Please read this instruction manual carefully before using the instrument. It will provide you with the necessary information for the correct use of the instrument, as well as a precise idea of its versatility. These instruments are in compliance with directives. All rights are reserved. [. . . ] · Select the 2nd buffer value on the secondary display by pressing or (e. g. pH 4. 01). · Only when the reading is stable the probe indicator " " will stop flashing (after about 30 seconds) and the "CFM" indicator will blink. · Press CFM to confirm the calibration; if the reading is close to the selected buffer, the meter stores the reading, adjusting the slope point and the secondary LCD will display the expected third buffer value. If the reading is not close to the selected buffer, "WRONG " will blink. BUF · Press CAL and the calibration process is ended with the offset and the 1st slope of the meter calibrated. 30 Three-point Calibration · Proceed as described above but do not quit calibration by pressing CAL. Note The meter will automatically skip the two buffers that were used to prevent errors. · After the second calibration point is confirmed, immerse the pH electrode and the Potential Matching Pin into the third buffer solution (e. g. pH 10. 01) and stir gently. Note The electrode should be submerged approximately 4 cm (1½") in the solution. The temperature probe should be located as close as possible to the pH electrode. · Only when the reading is stable the probe indicator " " will stop flashing (after about 30 seconds) and the "CFM" indicator will start blinking. · Press CFM to confirm the calibration; if the reading is close to the selected buffer, the meter stores the reading, adjusting the 2nd slope point and the calibration process is ended with the offset and the 1st and 2nd slope of the meter calibrated. If the reading is not close to the selected buffer, "WRONG " will blink. BUF Note During calibration, the secondary LCD displays the selected buffer value. This will allow you to check the buffer temperature during calibration. 31 CALIBRATION WITH MANUAL TEMPERATURE COMPENSATION · Enter the calibration procedure and press LCD to display the temperature on the secondary LCD. · Unplug any temperature probe that may be attached to the meter. · Note the temperature of the buffer solutions with a ChecktempC or an accurate thermometer with a resolution of 0. 1°C. · Use or to manually adjust the display reading to the value of the reference thermometer (e. g. 20°C). · Follow the calibration procedure above (see page 27). Note To toggle between the pH buffer and the temperature press LCD. When a one-point calibration is carried out only the pH offset is computed and stored, while the pH slope is fixed according to the theoretical values. With a two-point calibration, offset and slope are computed to fit the two calibration points. With a three-point calibration the offset and first slope values refers to pH 4. 01 and 7. 01 buffers, while the second slope refers to pH 7. 01 and 10. 01 buffers. Note If the process meter has never been calibrated or an EEPROM reset has occurred, the meter continues to perform measurement. However, user is informed of a pH calibration requirement by a blinking "CAL" (see "Startup" section). The device must be calibrated within the temperature range of 0-95°C. Outside this range, the buffer pH values are not reliable. 32 mV INPUT CALIBRATION The pH/mV controller is factory calibrated for the mV and temperature inputs. · Short the Connection for Potential Matching Pin (#9 at page7) and the Connection for the Electrode Reference (#8 at page 7) with a jumper wire. · Attach a HI 931001 (pH 500) or HI 8427 (mV 600) simulator to the BNC socket. · Press and hold first CFM and then CAL to enter the mV Input Calibration mode. · With pH 500, the meter will ask for the calibration procedure code number. [. . . ] When not in use, the electrode tip should be kept moist and far from any type of mechanical stress which might cause damage. This can be achieved by installing the electrode in such a way that it is constantly in a well filled with the sample (stream or tank). The protective cap can also be filled with HI 70300 Storage Solution if the electrode is not being used at all. With industrial applications, it is always recommended to keep at least one spare electrode handy. [. . . ]