User manual EUTECH INSTRUMENTS WATERPROOF ORPTESTR 10 ORPREDOX

[. . . ] To complete the calibration, release the HOLD/ENT button and wait for 5 seconds for automatic confirmation. The primary display will stop flashing and the secondary display will automatically show `CO' before the screen return to the single display measurement mode. The mV annunciator will now changed to `R. mV' indicating the value displayed is a relative mV value of the default measurement. Rinse electrode in tap water before measuring other solutions. HOLD Function This feature lets you freeze the display for a delayed observation 1. [. . . ] DO NOT use de-ionized water. ORP Measurement 1. Remove cap from the electrode and press the ON/OFF button to switch the tester on. Dip the electrode about 2 to 3 cm into the test solution. Stir once and let the reading stabilize for 2 to 5 minutes. Note the ORP value or press HOLD/ENT button to freeze the reading. Press HOLD/ENT again to release the reading. If you do not press a button for 8. 5 minutes, the tester will automatically shut off to conserve batteries. Note: For ORPTestr10BNC, please refer to the ORP electrode's instruction manual. Calibration Calibration is not necessary unless exact readout agreement with a work standard and at a specific ORP value is needed. To achieve this, use the following procedure: 1. Select a known solution sample from the actual process as near the critical ORP value as possible, for example, 255 mV. Dip the conditioned electrode into this solution for 2 to 5 minutes until the readings stabilize. Press CAL button to enter Calibration mode. The screen will switch to a dual display with the upper display flashing the relative mV value to be calibrated and the lower display showing the default measurement value of the sample. The `CAL' indicator will also be shown on the screen replacing `MEAS' to indicate that the tester is in calibration mode. Switching on ORP Testr 10 With meter powered off, press CAL and ON/OFF at the same time. First release ON/OFF button, then CAL button. Figure 4: User Reset Sequence After reset, whole LCD segment lits up and goes back to measurement mode. Ready to take measurement Note: To abor t calibration, press the `CAL' button to return to the measurement mode. Figure 2: Power Up Sequence Electrode Maintenance 1. Rinse the electrode with tap water or electrode storage solution after each measurement. In aggressive chemicals, dir ty or viscous solutions, and solutions with heavy metals or proteins, take readings quickly and rinse electrode immediately afterward. If possible, keep a small piece of paper or sponge in the electrode cap ­ moistened with clean water or electrode storage solution (NOT de-ionized water) ­ and close the cap over the electrode. Electrode Replacement You can replace the electrode module at the fraction of the cost of a new tester. When the tester fails to calibrate or gives fluctuating readings in calibration standards, you need to change the electrode. With dry hands, grip the ribbed tester collar with electrode facing you. Twist the collar counter clockwise (see picture A). [. . . ] Prices are subject to change without notice. Rlbbed collar Specifications Large Screen Tester ORPTestr10 / ORP Testr 10BNC -999 mV to +1000 mV 1 mV ±2 mV Offset adjustment up to ± 150mV After 8. 5 minutes from last key press Yes Yes Dual 4 x 1. 5V "A 76" micro Alkaline Batteries More than 500 hours 0 ­ 50 °C 6. 5 "L x 1. 5"dia. (165 x 38 mm) Boxed: 220 x 60 x 50 mm Weight 3. 25 oz (90 gm) Range Self-Diagnostic Messages 3 Bars indicates Battery is full (100%) Insert Electrode Module Electrode Module Large O-ring Resolution Accuracy Calibration Window Auto Off User Reset Non Volatile Memory Backup Low battery indicator 2 Bars indicates 50% of the battery life is left 1 Bar indicates 25% of the battery life is left Blinking battery casing indicates the need to replace batteries with fresh ones as specified by manufacturer Small O-ring Small Tab Large Tab Over range / Under range signal Or / Ur Electrode is not in contact with solution or electrode is failing Replacement sensor is not connected properly to the tester during sensor replacement LCD Display Power Requirement Battery Life Operating Temperature Error Message r. 0 mV calibration error while attempting to calibrate tester to a value which is out of range 4. Gently push the module onto the slots to sit it in position. [. . . ]