PART THREE - OPERATION
SECTION 5 - CALIBRATING THE ANALYZER
Accu4™ Low-range Turbidimeter System
Rev. 2-300
60
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
dynamically 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
Ö
Ö
and
Õ
Õ
keys
(coarse adjust) and
×
×
and
Ø
Ø
keys
(fine adjust) to adjust Output 1’s minimum value to read
exactly “4.00 mA” on the digital multimeter -- not the
analyzer display.
8.
Press
ENTER key
to complete calibration of the
minimum endpoint value.
9.
After the
screen re-appears, use
Ø
Ø
key
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.
10. Use a calibrated digital multimeter to measure Output
1’s actual maximum value.
11. Use
Ö
Ö
and
Õ
Õ
keys
(coarse adjust) and
×
×
and
Ø
Ø
keys
(fine adjust) to adjust Output 1’s maximum value to read
exactly “20.00 mA” on the digital multimeter -- not the
analyzer display.
12. Press
ENTER key
to complete calibration of the
maximum endpoint value.
This completes Output 1 calibration.
