Advertisement
3.3 Relay Output
The relay output can be used as a switch that responds when the
process value moves above or below a setpoint.
•
Low:
Output energizes when process variable is less than the setpoint.
The output will be de-energized when the process variable moves
above the setpoint plus the hysteresis value.
•
High:
Output energizes when process variable is greater than the
setpoint. The output will be de-energized when the process
variable moves below the setpoint plus the hysteresis value.
•
Off
The relays may be disabled if not being used.
VIEW menu
•
During normal operation, the ProcessPro displays the VIEW menu.
•
When using the CALIBRATE or OPTIONS menus, the ProcessPro will return to the VIEW menu if no
activity occurs for 10 minutes.
•
To select the item you want displayed, press the UP or DOWN arrow keys. The items will scroll in a
continuous loop.
•
Changing the display selection does not interrupt system operations.
•
No keycode is necessary to change display selection.
•
Output settings cannot be edited from the VIEW menu.
View Menu
The displays below are temporary. After 10 minutes the display returns to the permanent display.
4
Display
Monitor the pressure input from the sensor.
Pressure:
60 PSI
This is the permanent display.
Loop Output:
Monitor the 4 to 20 mA Loop output.
12.00 mA
Last CAL:
Monitor date for scheduled maintenance or date of last calibration.
02-10-09
(See description in Calibrate Menu.)
Process
Hysteresis
Low Setpoint
Output energized
Output de-energized
Process
High Setpoint
Hysteresis
Description
Time
Time
Pressure Cal:
0.0
psi >
Signet Pressure
Transmitter
Relay 1
Relay 2
ENTER
Signet 8450-2 Pressure Transmitter
Advertisement
