22
4.3 ORP
CALIBRATION
If transmitter be 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 status. After calibrating, instrument automatically returns to slope display
function form. Press
to return to measurement mode and finish calibration process.
CAL
HO LD
mV
086.0
CA
C AL
HO LD
MEA
0
S PI
mA
S P2
mV
000
S ET
028
SE T
CA
CAL
HO LD
CA
CAL
HO LD
CAL
HO LD
mV
086.0
MEA
255
S PI
mA
mV
0 .086
0 .255
6.90
4.00
don e
P ut t he s enso r i n to O RP86 mV U
afte r, di s pl a y v a lus s tabl e m eter
a uto ma ti c loc k th e va lue 5 s ec ond s
l ater
Put the se nsor i nto O RP255mV U
after, dis pl ay v alus s ta ble m ete r
automa tic lock the va l ue 5 s econ ds
la ter
M OD
ENT
ESC
ENT
ENT
U
U
