DP2000 Portable Dew Point Analyzer Operations Manual
Super Systems Inc.
Page # 16 of 30
15.0
Allow the sensor to achieve equilibrium at ambient atmosphere
15.1
After the 11.3% (Zero) calibration has been completed, remove the
sensor from the calibration salt and replace the cap.
15.2
Leave the sensor probe in the gland and while the unit is still on,
allow it to achieve equilibrium at the ambient atmosphere in the room.
This should take between two and three minutes. You will know when
this has been accomplished when the numbers on the display begin to
stabilize.
16.0
Re-assemble the unit
16.1
After the calibration process has been completed, remove the
sensor probe from the gland and return it to the sensor-sampling
chamber, taking care to position it properly. The white mark on the
sensor probe should face towards the right of the sensor-sampling
chamber (at 3:00 if it were the face of a clock.). If the white mark is not
visible, then it should be placed so the sample flow directly strikes the
face of the mirror on the sensor tip (the sample flows from right-to-
left). In other words, the mirror should face the incoming gas stream.
16.2
Hand-tighten the black sensor gland to prevent air from leaking out
of the sampling chamber.
16.3
Slide the faceplate into position with the back posts going into the
corresponding holes as the faceplate slides back.
16.4
Verify that the system is leak proof by turning on the pump and
placing a finger over the sample inlet port. The flow meter on the side
of the unit will drop to zero if there are no leaks. If a leak is detected,
make sure that all tubing connections are tight, especially the black
sensor gland.
16.5
After the unit has passed the leak test, re-fasten the screw into the
faceplate and tighten it.
17.0
Make sure that all caps are replaced on the calibration salts, and return
the DP2000 to service.