Instruction manual

ControlWave Gas Flow Computer (GFC Plus) Instruction Manual (CI-ControlWave GFC Plus)
Revised Feb-2013 Service & Troubleshooting 5-9
Removing /
Replacing the
Backup Battery
1. If the ControlWave GFC Plus is running, place any critical control
processes under manual control.
2. Remove power from the ControlWave GFC Plus.
3. Remove the CPU/System Controller board assembly from the
housing.
To remove the lithium battery, gently pry up the tab holding the battery
in the coin cell socket and remove the battery with a pair of tweezers or
needle-nosed pliers. Install the replacement battery.
4. Replace the CPU/System Controller board assembly in the housing.
5. Re-connect power to the ControlWave GFC Plus.
6. Once the battery has been replaced, the unit executes its Flash-
based application (“boot project”) at power-up, but all of the
current process data is lost. At power-up, the ControlWave GFC
Plus acts as though it had just been booted and reverts back to the
initial values specified in its application.
5.2.5 Enabling / Disabling the Backup Battery
For maximum shelf life, the CPU/System Controller board ships
from the factory with the installed lithium backup battery disabled.
You must enable it when you install the CPU/System Controller
board.
Enabling
To enable the battery, install jumper W3 on pins 1-2.
Disabling
For maximum shelf life, you can isolate the battery from the circuit by
placing jumper W3 on pins 2-3.
5.2.6 Removing/Replacing the Case-Mounted Radio or Modem
1. If the ControlWave GFC Plus is running, place any critical
control processes under manual control.
2. Open the cover and shut down the ControlWave GFC Plus by
disconnecting the power at the CPU/System Controller assembly
terminal TB1 (and if applicable, TB2).
3. Disconnect (unplug/unscrew) all power and interface connectors
from the radio/modem.
4. Disconnect the antenna cable from the radio
5. Loosen the two screws that secure the radio/modem mounting
plate to the fabrication panel.
6. Depending on the unit in question, slide the radio/modem
mounting plate either right or upward, and remove it with the
radio/modem attached.
7. Remove the mounting screws from the radio/modem mounting
plate and remove the radio/modem. Replace the radio/modem,