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22
4.3
ORP CALIBRATION
If transmitter is set up as ORP measurement mode. You can only calibrate one point.
1.
Entering calibration mode described as Item 4.1. LCD will show CAL ORP.
NOTE: If LCD shows CAL pH. Please switch to ORP mode from pH mode according to
procedures of Item 5.8.
2.
Put ORP electrode into ORP standard solution (86mV).
3.
Press
key to begin calibrating. mV value displayed is the mV value output by ORP
electrode. There is no offset value. The lower display will show U and blink. If one point
calibration is finished, Then, the lower display shows 255mv to tell user to change standard
solution.
4.
Clean electrode and put it into relevant standard solution. Press
key to confirm.
Instrument enters into calibration mode. After calibrating, instrument automatically returns
to slope display function form. Press
to return to measurement mode and finish
calibration process.
C A L
H O L D
m V
086.0
CA
C A L
H O L D
MEA
0
S P I
m A
S P 2
m V
000
S E T
028
S E T
CA
C A L
H O L D
CA
C A L
H O L D
C A L
H O L D
m V
086.0
MEA
255
S P I
m A
m V
0.086
0.255
6.90
4.00
done
Put the sensor into ORP86mV U
after, display valus stable meter
automatic lock the value 5 seconds
l a t e r
Put the sensor into ORP255mV U
after, display valus stable meter
automatic lock the value 5 seconds
l a t e r
MOD
ENT
ESC
ENT
ENT
U
U