24
MW160
Bench Meter
9. ORP
9.1. PREPARATION
For accurate ORP measurements, the surface of the electrode must be clean and smooth.
Pretreatment solutions are available to condition the electrode and improve its response
time (see ACCESSORIES section).
Note:
For direct ORP measurements use an ORP probe. MA9020 ORP Solution can
be used to confirm that the ORP sensor measures correctly. mV readings are not
temperature compensated.
If necessary, press RANGE until the display changes to ORP measurement range.
9.2. CALIBRATION
mV Calibration
The
MW160
is factory calibrated for mV.
Milwaukee’s ORP electrodes are interchangeable and no mV calibration is needed when
they are replaced.
If the mV measurements are inaccurate, mV recalibration should be performed. For an
accurate recalibration contact Milwaukee Technical Service.
Relative mV Calibration
Note:
When a Rel mV calibration is performed, the range changes from mV to Rel mV.
1. Immerse the probe approximately 4 cm (1 ½”) into the standard solution and stir
gently.
2. Press CAL. The CALIBRATION tag appears on the LCD, the relative mV value is displayed
in the first LCD line and the absolute mV value in the second LCD line. The WAIT tag is
displayed blinking until the reading is stable.
