User manual EUTECH INSTRUMENTS ALPHA PH1000 PHORP CONTROLLERTRANSMITTER

[. . . ] The manual functions in two ways, firstly as a step by step guide to help the user operate the instrument. This instruction manual is written to cover as many anticipated applications of the Alpha pH 550 Monitor. If you have doubts in the use of the instrument, please do not hesitate to contact your nearest Alpha Authorised Distributor. The information presented in this manual is subject to change without notice as improvements are made, and does not represent a commitment on part of Thermo Scientific. [. . . ] All pH buffer values have window of up to ± 1 pH tolerance during calibration. Calibration error can be occurred if the measured pH value exceeds this window. If you wish to abort the pH calibration, press and keys simultaneously and the pH Monitor reverts to pH measurement mode. 4. 3. 1 For USA Standard Buffer Make sure that the pH Monitor is set to accept USA standard buffer in the Setup mode. (Refer Section 5. 4 for Buffer Selection Settings) The factory default is USA standard. It is recommended that you perform 2-point calibration at room temperature (25 oC), starting with the first buffer at pH 7. 00 followed by any other buffer value. (pH 4. 01, 1. 68, 10. 01 or 12. 45) 1-Point Calibration: 1 CAL 2 CAL CAL pH 3 mV 4 MEAS ENT HOLD READY HOLD CAL HOLD ENT READY PH pH pH °C ATC 1 2 From pH measurement mode press CAL key to enter calibration mode as described in section 4. 2. Immerse the temperature probe in the buffer solution if ATC mode is enabled. Immerse the potential matching pin in the buffer if symmetrical mode is enabled. Lower display shows pH 7. 00 (USA standard buffer). - 17 - 3 4 Upper display shows the current uncalibrated pH reading. The pH Monitor re-calculates electrode properties based on the calibration. Immerse the temperature probe in the buffer solution if ATC mode is enabled. Immerse the potential matching pin in the buffer if symmetrical mode is enabled. Use and keys to select your second buffer from one of the preset values: pH 4. 01 or 1. 68 or 9. 18 or 12. 45. Remove the electrode from the first buffer, wash and then immerse it into the second buffer. The pH Monitor re-calculates electrode properties based on the calibration. The new slope (in mV) is shown in the upper display and pH reading at 0mV (pH7. 00 ± offset) is shown in the lower display. The pH Monitor reverts to pH measurement mode. 3 4 5 NOTES: · · To exit from pH calibration mode without confirming calibration, press and keys together When confirming the buffer measurement, if the measured pH value is not within ±1. 00pH from selected buffer value, the electrode annunciator blinks and ERR indicator appears in the display. This error can also occur if non-standard buffers are used or the electrode has worn out. If this happens, press both and keys together to restart the calibration beginning from Step1 When calibrating with manual temperature compensation, the meter automatically changes from the preset process temperature to the calibration temperature. After leaving the calibration mode, the pH Monitor reverts back to process temperature. 4. 4 ORP Calibration The pH Monitor allows a single point ORP calibration. ORP calibration process is available only when the measurement mode is set to ORP. [. . . ] To exit from any intermediate steps, press and keys simultaneously (escape). The pH Monitor returns to the first screen configuration settings (Cnfg). CAL dEF: 5. 6 Viewing Electrode Properties Each time you calibrate your pH electrode, the pH Monitor re-calculates slope & offset of the electrode and shown in the LCD at the end of calibration. The setup mode allows you to view slope & offset values at any time. NOTE: When the measurement mode is set to ORP, only the offset value of the electrode is displayed. 1 SETUP HOLD 2 ENT SETUP mV ENT pH For pH measurement mode 2 SETUP mV ENT For ORP measurement mode - 30 - 1 From pH (or ORP) measurement mode press ENT key to enter setup mode as described in section 5. 1. [. . . ]