PART THREE - OPERATION
SECTION 5 - ANALYZER CALIBRATION
Model P53 pH/ORP Analyzer (universal-mount 1/2 DIN)
Rev. 6-501
70
3.
Use
Ø
Ø
key
to select the “CAL OUTPUTS” line, and
press
ENTER key
to display
.
4.
With the “CAL OUTPUT 1” line selected, press
ENTER key
to display
.
5.
With the “CAL OUT 1 4 mA” line selected, press
ENTER key
to display a screen like
.
The displayed value is “counts” -- not mA -- that dy-
namically change when the output is adjusted.
6.
Use a calibrated digital multimeter to measure Output
1’s actual minimum value provided at Terminals 2 and 3
on TB1.
7.
Use
arrow keys
to adjust Output 1’s minimum value to
read exactly “4.00 mA” on the digital multimeter -- not
the analyzer display, and press
ENTER key
to com-
plete calibration of the minimum endpoint value.
8.
After the
screen re-appears, press
Ø
Ø
key
once to select the “CAL OUT 1 20 mA” line, and
press
ENTER key
to display a screen like
. Once again the displayed value is
“counts” -- not mA -- that dynamically change when the
output is adjusted.
9.
Use a calibrated digital multimeter to measure Output
1’s actual maximum value.
10. Use
arrow keys
to adjust Output 1’s maximum value to
read exactly “20.00 mA” on the digital multimeter -- not
the analyzer display, and press
ENTER key
to com-
plete calibration of the maximum endpoint value.
This completes analog Output 1 calibration.
