Detcon PI-700 User Manual
Page 15
Model PI-700
PI-700 Instruction Manual
Rev. 2.5
Page 11 of 54
Detcon Span Gas (See Detcon for Ordering Information). Recommended span gas is 50% of range
with Isobutylene in air or N
2
balance.
Detcon P/N 985-241100-321
In-Line Humidifying Tube 24"
a) Attach the calibration adapter to the threaded sensor housing or connect tubing to integral cal port. Apply
the test gas at a controlled flow rate of 200 - 500cc/min using the in-line humidifying tube, (200cc/min is
the recommended flow).
Observe that the ITM display increases to a level near that of the applied
calibration gas value.
b) Remove test gas and observe that the ITM display decreases to “0”.
Initial operational tests are complete. PI-700 VOC gas sensors are factory calibrated prior to shipment, and
should not require significant adjustment on start up. However, it is recommended that a complete calibration
test and adjustment be performed 16 to 24 hours after power-up.
Refer to zero and span calibration
instructions in Section 3.4.