GE FHSD720C Installation And User Manual page 23

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4. Enter Level 1 Access Code (260) - please see Section Access Codes on page 18 for more
information on Access Codes.
5. Use Parameter UP & DOWN to reach SETFAN (for high pressure units scroll to TESTTIM). For
more information please refer to SETFAN on page 24.
6. Press ENTER.
The display should show SETFAN 5 (the digit 5 should flash)
7. Press ENTER.
A rolling text message shows progress. When complete, the display resumes at OBSC/M 0.00%.
Normalization takes about 6 minutes. It is advised that the user does not try to change any
settings or revert to the menu during the normalization process.
Note: If the unit is in alarm a flow calibration cannot be performed.
Note: Press MENU to abort normalization at any stage.
Note: When complete, the display resumes at OBSC/M 0.00%
4.1.2 Small bore systems (FHSD7215DC)
Small bore systems rely on the pump speed to provide the vacuum rates in the system. The pump
speed cannot be altered from the factory default value under any circumstances.
Please follow these steps to normalise the air flow for a small bore system.
1. Press MENU.
2. Use Parameter UP & DOWN (Scan or Isolate buttons) to scroll to CONFIGURE.
3. Press ENTER (Sounder silence button).
4. Enter Level 1 Access Code (260) - please see Section Access Codes on page 18 for more
information on Access Codes.
5. Use Parameter UP & DOWN to reach TESTTIM.
6. Press ENTER.
A rolling text message shows progress. When complete, the display resumes at OBSC/M 0.00%
and all displayed flow rates will be set to 100%.
Normalization takes about 6 minutes. It is advised that the user does not try to change any
settings or revert to the menu during the normalization process.
On completion of the flow calibration process, document the values identified in the following procedure.
1. Enter the Maintenance list to display REL in.
2. Record REL in with system monitoring in overall position. Reset the unit to initiate a scan.
3. Record REL in values for each sector.
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FHSD700C Series Product Guide
17