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Instruction Manual Rev B
Off stack zero calibration
This procedure may be used if: A clear stack condition is not possible and the zero appears to be incorrect or if the
flange to flange distance on site are different than the original factory set up.
1. Remove the transceiver and retro reflector from the hinge pins, remove the service module
and install the system on portable off stack test stands and at the correct flange to flange
distance plus 11 inches. The additional 11 inches compensates for air plenum spacing, as the air
plenums are not used for the off stack zero calibration.
2. Clean transceiver and retro windows.
3. Connect the control unit with the control to service module test cable kit (p/n 1469) and apply
power to the system.
4. The retro reflector must be level.
5. Follow instruction for "Clear on stack zero and span calibration".
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