Maintenance
5-2
P/N 8040375G001
C
HELIX TECHNOLOGY CORPORATION
-
TI
CRYOGENICS
2. Remove the Network Terminal top cover by removing the two
screws on the rear panel and lifting the cover from the rear of the
chassis.
3. Refer to Figure 5-1 to locate the battery B1 and resistor R3 on the
circuit board.
4. Using a voltmeter, place the negative (-) probe on the lead of R3
closest to J6 as shown in Figure 5-1. Place the positive (+) probe
on the open face of battery B1.
5. Record the voltage reading. The minimum voltage reading should
be 1.8 volts. The maximum voltage reading should be 3.0 volts.
Proceed with step 6 if the voltage is below 1.8 volts. Proceed with
step 7 if the voltage is above 1.8 volts.
6. Refer to Memory Backup Battery Replacement if the battery
voltage is below 1.8 volts.
7. Replace the cover, refer to Appendix A, and call the local customer
support center for further assistance.
Memory Backup Battery Replacement
NOTE: Replace the existing battery with a 3.0 Volt, Panasonic
P/N BR2325 lithium battery or equivalent.
1. Turn power OFF to the Network Terminal and remove the
power cord from the power source.
2. Remove Network Terminal top cover by removing the two screws
on the rear panel and lifting the cover from the rear of the chassis.
3. Refer to Figure 5-1 to locate the battery B1 on the circuit board.
4. Using a screwdriver, gently lift the clip which holds the battery in
the socket and slip the battery out of the socket.
5. Install the new battery using the same method as described in
step 4.
6. Replace the Network Terminal top cover and screws.
7. Connect the power cord to the power source.
8. Turn power ON.
9. Refer to Section 4 - Operation to re-establish rough valve maps,
multi-pump REGEN programs.
NOTE: The unit serial number is no longer in memory and cannot be
reentered. For future reference, the serial number can be found on the rear
panel of the Network Terminal.
