20
Rinse the ORP probe in distilled water and immerse it in the ORP standard solution,
then press
[UP]
or
[DOWN]
key to adjust the ORP value to that the ORP standard.
Press
[ENTER]
key to save. The unit beeps to indicate a successful calibration.
Calibration is now complete and the unit will automatically switch to the ORP relative
mV
Measure mode
.
【
Note
】
:
When the ORP absolute mV reading is off, recalibrate RmV value.
I.
4-20 mA output
1.
Isolation voltage:
The maximum isolation voltage of the 4-20mA output contacts is 500 VDC. The
voltage differential between the 4-20mA output contacts and the load should not
exceed 500 VDC.
2.
Output load:
The maximum load is 500 ohm. Output current inaccuracies may occur for load
impedance in excess 500 ohm.
