Ec-P2 Calibration Procedure - Honeywell VA201T Calibration Handbook

EC-P2 Calibration Procedure

General Information
Calibration is recommended every six months in normal use. Each SMART-CELL stores its calibration and
alarm setpoint information on its own internal memory chip. When the SMART-CELL is plugged into the
Manning EC-P2, this information is used by the EC-P2. The SMART-CELL can be field calibrated by the user
or returned to Honeywell Analytics for factory calibration.
The calibration procedure requires the use of a bypass tee to allow the gas to be drawn into the flow cell without
creating variable pressure or dilution problems. Calibration gas cannot be fed into the flow cell under pressure.
When applying calibration gas, use the bypass tee as shown in the illustration below. The flowrate of calibration
gas should be high enough that at least 0.5 SCFH is flowing out of the calibration tee. This can be measured
with the supplied flowmeter and insures that air is not being drawn into the unit and diluting the calibration gas.
The unit may be zeroed without spanning it; however, never span the unit without first zeroing it.
Entering Zero/Span Mode
Push power button to turn unit on. Wait for power up sequence to finish (30 seconds).
Push and hold the unnamed button (second from left) first, then push and hold the MENU button. Hold
both buttons until the screen goes blank (2 seconds). Release both buttons and the unit is now in
Programming Mode.
Push the SENS button and the unit is now in the zero/span mode.
Zero Calibration
Be sure the unit is in clean air or apply zero air for two minutes.
Push ZERO button.
Push SAVE button to save the new zero calibration.
Span Calibration
Push SPAN button.
Apply span gas for two minutes.
Push INC button (increase) or DEC button (decrease) until the display matches the span gas concentration.
Push SAVE button to store new span calibration.
Exiting Zero/Span Mode
Push DONE button twice slowly to get back into normal operation mode.
Manning EC-P2
Calibration Handbook
67