Apera ORP60 User Manual

4) Dip electrode in the standard buffer solution, stir gently, and allow it to
stand still in the calibration solution until a stable reading is reached. When
stable icon comes up, press to adjust the calibration value
according to the table below(also on the buffer bottle’s label).
222 mV (25˚C) ORP Standard Buffer Solution Calibration Reference Table
Temperature (˚C)
mV
Temperature (˚C)
mV
10
242
30
215
15
235
35
209
20
227
38
205
25
222
40
201
For example, if the temperature is around 25˚C, then adjust the calibration value to
222 mV. If the temperature is around 20˚C, then adjust the calibration value to 227
mV.
press to complete the calibration.
6. ORP Measurement
Press to power on, clean the probe in distilled water and dry it. And place the
probe in the tested solution and stir gently and let it stand still. Read the
measurement after comes up and stays.
7. Notes
1) Usually there’s no need to calibrate for ORP testing. When used for a long
time, users can test it in 222 mV ORP standard buffer. If the error is big,
please calibrate according to the steps in 5.1 to 5.4.
2) The meter has self-diagnosis function. Please refer to the followed chart for
detailed information.
Symbol
Self-Diagnosis information
How to fix
is pressed before the
measurement becomes stable
(smiley face comes up)
Wait till the smile icon appears and then
short press
7.1 The cleaning and activation of ORP probes
After long-time use, the surface of the platinum sensor can be contaminated and
cause inaccuracy and slow response time. If that happened, the followed

Apera ORP60 Specifications

General

Brand	Apera
Model	ORP60
Category	Measuring Instruments
Language	English