Detcon CX-DM - Manual (Page 14)

Model CX-DM
Material Requirements
• Splash Guard with integral Cal Port and with Wind Guard (Detcon PN 613-120000-700) -or-
• Threaded Calibration Adapter (Detcon PN 943-000006-132) - or -
• Teflon Calibration Adapter for highly reactive gases (Detcon PN 943-01747-T05)
• Detcon Span Gas; 50% of range target gas in balance N
2
or Air at fixed flow rate between 200-
500cc/min (500cc/min is preferred)
NOTE
Calibration gas generators using perm tubes or electrochemical sources may be used in
place of span gas cylinders.
13. Attach the calibration adapter to the splashguard adapter assembly or connect tubing to integral cal
port. It is recommended that the wind guard is installed over the splash guard during calibration.
14. Apply the test gas at a controlled flow rate of 200 - 500cc/min (500cc/min is the recommended flow).
Observe that the ITM display increases to a level near that of the applied calibration gas value.
NOTE
The wind guard must be used during calibration with the integral cal port to ensure proper
calibration.
15. Remove the test gas and ensure that the display decreases to "0".
16. If a calibration adapter was used during these tests, remove them from the unit, and re-install the
Splash Guard. If used, remove the wind guard.
Initial operational tests are complete. CX-DM toxic gas sensors are factory calibrated prior to shipment, and
should not require significant adjustment upon 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 3.3.
2.7.1 O
2
Deficiency Sensors
1. When first powered up, the CX-DM display should read close to 20.9%.
2. The reading should stabilize within 1 to 2 minutes of power-up (assuming a normal ambient O
2
concentration).
Initial Operational Tests
After a warm-up period of 5 minutes, verify that the sensor responded to the O
2
deficiency.
Material Requirements
• 700 Series Splash Guard with integral Cal Port and with Wind Guard (Detcon PN 613-120000-700 )
-or-
• Threaded Calibration Adapter (Detcon PN 943-000006-132)
• Detcon Zero Gas: 100% N2 at fixed flow rate of 200-500cc/min
1. Attach the calibration adapter to the threaded sensor housing or connect tubing to the integral cal port.
Apply the test gas at a controlled flow rate of 200-500cc/min (500cc/min is the recommended flow).
Observe that the ITM display decreases to a level near zero.
CX-DM Instruction Manual Rev. 1.3 Page 10 of 40