3
Complete kit
4
Preparation Before Use
1) Pour certain amount of Storage solution (KCl) into the probe cap, soak the probe for 3 to 5
minutes to activate the sensor (if frequently used, there is no need to soak).
2) The soaking solution is 3M KCl solution, which comes with the test kit. Users can also make
it by themselves by dissolving 25g KCl in 100 ml distilled water.
5
ORP Calibration
1) Clean electrode in distilled water and dry it.
2) Pour certain amount of 222 mV ORP standard buffer solution into the calibration bottles
(about half volume of the bottle).
3) Short press
to turn the meter on. Long press
to enter calibration
mode. If you need to exit calibration mode, short press
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).
2
22 mV (25˚C) ORP Standard Buffer Solution Calibration Reference Table
Temperature (˚C)
10
15
20
25
30
35
38
40
mV
242
235
227
222
215
209
205
201
F
or 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.
