Span Filter Value; Record The Zero/Span Values; Off Stack Zero Calibration - Emerson OPM4001 Installation And Operation Manual

Opacity/dust density enhanced controller

Table of Contents

I N S T R U C T I O N

M A N U A L

SPAN FILTER VALUE

1. With the zero switch in zero, place the span switch in span. Span is not adjustable, final value is a function of filter

value, transceiver calibration and OPLR. Record the final value.

2. Return both zero and span switches to operate, normal/test to normal, T2/Opacity to Opacity.

1. To record the final values you will need to enter the zero and span into the TECH set up page. This completes the

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.

Remove the transceiver and retro reflector from the hinge pins, remove the service module and install the system on OPM Opacity

portable off stack test stands (1A99993H37) 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.

1. Clean transceiver and retro windows.

2. Connect the control unit with the control to service module test cable kit and apply power to the system.

3. The retro reflector must be level.

4. Follow instruction for "Clear on stack zero and span calibration".

R E V

4 . 2

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