Aquametrix 2200C Conductivity Controller User Manual - Manual (Page 21)

b) Press CALL until the OUTPUT HIGH LED illuminates, which is “Temperature
output, 100% point” in the Utility Menu (See table in 7.2.2). Use the arrow keys
to make the display read 45.0. Press ENTER. The display will flash until
ENTER is pressed again to confirm entry.
c) Press CALL and the OUTPUT LOW LED will illuminate, which is “Temperature
output, 0% point” in the Utility Menu (See table in 7.2.2). Use the arrow keys to
show 10.0 on the display. Press ENTER twice as above.
d) Press RUN to return to on line or press CALL to proceed to another item in the
Utility Menu.
7.5 Adjust 0-1 mA / 0-5 Vdc Output
7.5.1 It may be desirable to fine tune the 0-1 mA / 0-5 Vdc output to take into account the
characteristics of your particular loop. The following method involves a high and
low calibration and requires the use of a digital multi-meter. (DMM). Proceed as
follows ignoring the instrument display:
a) Turn off the power to the instrument. Connect your DVM in parallel with the 0-5
Vdc output terminals on the power supply board.
b) Turn on the power. Enter the Utility Menu as described in 7.2.1.
c) Press CALL until the CONTROL RELAY SETPOINT LED illuminates, which is
"0-1 mA/ 0-5 Vdc output adjust, low" in the Utility Menu (See table in 7.2.2).
Use the arrow keys to make your DMM read 1.25V. Press ENTER twice to
confirm.
d) Press CALL and the CONTROL RELAY DEADBAND LED will illuminate, which
is "0-1 mA / 0-5 Vdc Output adjust, high" in the Utility Menu (See table in 7.2.2.)
Use the arrow keys to make your DMM read 3.75V. Press ENTER twice to
confirm.
e) Press RUN to return to on line or press CALL to proceed to another item in the
Utility Menu.
7.6 Adjust 4-20 mA Output
7.6.1 It may be desirable to fine tune the 4-20 mA isolated output to take into account the
characteristics of your particular loop. Before deciding that the adjustment is
necessary, be aware of the "Output High" and "Output Low" settings you may have
programmed as described in Section 5.4. The following method involves a high and
low calibration and requires the use of a Digital Multimeter (DMM). Proceed as
follows ignoring the instrument display.