User manual EUTECH INSTRUMENTS ALPHA PH 2000D PH CONTROLLER

[. . . ] Instruction Manual lpha-pH2000D pH and ORP Controller/Transmitter Technology Made Easy . . . 68X216855 Rev 1 12/04 Preface This manual serves to explain the use of the lpha-pH2000D series pH/ORP controller/transmitter. The manual functions in two ways, firstly as a step by step guide to help the user operate the instrument. Secondly, it serves as a handy reference guide. This instruction manual is written to cover as many anticipated applications of the lpha-pH2000D pH/ORP controller/transmitter. [. . . ] Press the or key to adjust the upper display mV value to match your exact reading. Press the ENT key (or CAL key) to confirm. The controller calculates the correction factor and returns to the Measurement mode. The "R. mV" annunciator (Relative mV) will be shown on the display indicating that the value displayed is the relative mV value of the default measurement. 5. 4 ORP -% Calibration If controller is configured for ORP-% measuring you can perform a calibration at two points using a low concentration sample (20%) and a high concentrate sample (80%). To calibrate the controller for ORP %: CAL HOLD CAL % HOLD CAL % MEAS C. 1 CAL C. 2 59. 0 CAL % 1. Enter Calibration mode as described in section 5. 1. The display should read "CAL ORP". Note: If the display reads "CAL PH", see section 6. 9 for procedures on how to switch from pH to ORP-mV readings. The display prompts you to place the sensor in the high concentration sample (relative value of 80%). Place sensor in high concentration sample, then press the ENT key (or CAL key). The unit automatically adjusts its reading to match the solution value. The display prompts you to place the sensor in the low concentration sample (relative value of 20%). Remove the electrode from the first standard, wash it well and then immerse it in the 20% standard. When the display stabilizes press the ENT key (or CAL key). The electrode and "CAL" indicator flashes and the controller adjust its display to the 20% relative value and exits to the Measurement mode. - 16 - Instruction Manual lpha-pH2000D Note: If there is a calibration error, the controller displays "CAL ERR". If this happens, push both or keys (escape) to restart the calibration beginning from Step 1. Note: If you stop calibration after entering the first value, or if calibration is defective, the controller will use its original calibration data. 5. 5 View actual zero and slope MEAS PH O C ATC CAL ENT CAL ENT pH 1. While in Measurement mode press the CAL key. The display will prompt you to enter a security code. Leave the security code at "000" (view only mode). The display shows the slope in mV (upper value) and the pH reading at 0 mV (zero point, lower value). Note: If no key is pressed for 30 seconds the transmitter automatically returns to the Measurement mode. [. . . ] Eutech Instruments/ Oakton Instruments will not be responsible for any damage resulting from careless or insufficient packing. Warning: Shipping damage as a result of inadequate packaging is the user's/distributor's responsibility, whoever applicable. Please follow the guidelines below before shipment. 10. 4 Guidelines for returning unit for repair Use the original packaging material if possible when shipping the unit for repair. Otherwise wrap it with bubble pack and use a corrugated box for better protection. [. . . ]