Appearance; Display - CLEAN Instruments PH200 Operation Manual

4 Appearance

4.1 Display

1 Measuring Status-Calculating
2 Measuring Status-Stable Value
3 Electrode inserted display
4 Setup display
5 Offset - Electrode Offset
6 Slope - Electrode Slope
7 Done - Calibration Done
8 mV PH mA % mS uS
9 Auto / Manual - Temperature Compensation
Calibrated Points -USA Buffer Standard
10 4.01 7.00 10.01
11 4.01 6.86 9.18 Calibrated Points - NIST Buffer Standard
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mg/L ppm ppt g/L mBar - Unit of Measurement
7.4 Calibration
1. In measurement mode, press to enter calibration process. .
2. First point calibration-100% air calibration: put the sensor in air, after you get a stable value or the
stable symbol shows up, press key to confirm 100.0% saturated dissolved oxygen point.
3. After pressing , the electrode Slope will be showed on the screen. Then automatically
initiate second point calibration -0% point calibration.
Note: Factory defaults first point 100% air calibration. If you don't need to calibrate 0% point,
press key to go back to measurement mode.
After air calibration, the meter will automatically initiate second point calibration:
1. Dip the sensor in standard solution, when the value is stable, press
Then system go back to measurement mode.
2. If you need to adjust the Atmospheric Pressure Compensation and the Salinity Compensation
according to local situation. You can set in P-01 and P-02.
Illustration on the calibration point symbols:
1. The"Air" is shown at the right bottom of the screen during and after air calibration.
2. The "Zero" is shown at the right bottom of the screen during and after air calibration.
3. Both"Air" and "Zero" is shown after 2 points calibration.
Note:
You can press back to the measurement mode during calibration and all the calibration
point is saved. When the measured signal is out-ranged, the sign "Err" will be showed, possibly
the aging electrode or the polluted standard solutions lead to this.
key to confirm 0% point.
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