EMS 1304, Installation And Operation Manual

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3.
This completes the calibration.
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 E.M.S. 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. If EMS test stands are not available, an alternate method is to use 3" pipe
flanges with air plenums installed, contact the factory for air plenum availability. Set the spacing
between the 3" flanges exactly the same as Flange-to-Flange measurement.
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".