pH simulation when the preamplifier is located in a remote junction box
or in a sensor mounted junction box
Figure 8-6:
pH simulation with 381+ sensor
1. Verify that switch s-1 is set to sensor or junction box.
2. Turn off sensor diagnostics.
3. Turn off automatic temperature compensation. Set manual temperature
compensation to 25 °C (77 .
4. Refer to Figure 8-7 for connections to the sensor.
5. Remove the cover from the sensor. Leave the sensor cable attached.
6. Remove the glass electrode cable form the BNC connection at the preamplifier.
7. Connect one end of a jumper wire to the solution ground pin and connect the other
end to the reference electrode pin.
Both pins are underneath the preamplifier. Leave the preamplifier installed on the
pins.
8. Connect one end of a second jumper wire to the reference electrode pin. Be sure the
preamplifer remains connected to the pins.
9. Press DIAG on the IRC.
The InPut voltage in millivolts appears in the temperature-output area. The main
display shows pH.
Diagnostics and troubleshooting
78 Rosemount 5081
To Next Page
Loading...
