To 20 Ma - Signet 9900 Operating Instructions Manual

4 to 20 mA

This is the normal display
and does not time out.
VIEW Mode Menu
Displays the 4 to 20 mA LOOP output
Diagnostic display showing raw input from 4 to 20 mA sensor.
Bottom line shows one of three states (OFF, ON, PLS) for each of the three relays. Displays remaining
time for CYC LOW or CYC HIGH mode. The relay(s) will remain ON while counting down.
NOTE: (Reset the Timer) In the RELAY menu, select TEST RELAY function. The timer will reset to 0 if
the condition no longer exists when the TEST is performed.
The timer will restart if the condition still exists.
CAL Menu
ON prevents relays from activating while making adjustments, and relays in PULSE mode will suspend
pulsing. Output is held until the user exits the CAL menu. Select OFF/ON.
Default = OFF.
Applies a linear offset to the measurement.
For single point calibrations, assign the average value of your process to STANDARD.
For two-point calibrations, assign the min or max value of your process to STANDARD.
Applies a slope to the measurement. The SLOPE is used for two-point calibrations along with the
STANDARD above. If you assigned the min value of your process to the STANDARD, then assign the
max value to the SLOPE. Else, assign the min value to the SLOPE. The slope and standard values must
be at least 0.1 units apart.
Resets Standard and Slope calibration to factory settings. After pressing ►, select YES/NO.
Enter date of calibration (mm-dd-yyyy) and initials of calibrator (ii).
4 to 20 mA Setup Checklist
1. Make sure 4-20 mA INPUT sensor type is selected
(see System Setup Menu, page 25).
2. Set 4 mA value (refer to your 3rd-party sensor manual).
3. Set 20 mA value (refer to your 3rd-party sensor manual).
4. If LOOP is used, set the minimum and maximum 4 to 20 mA setpoints.
5. Set Last Cal Date and initials.
6. If desired, set up relay functions for your own application.
9900 Transmitter 43