Super Systems DP2000 - Manual (Page 11)

SSi Super Systems Inc.
Product Manual - Model DP2000 Portable Dew Point Analyzer
SSi Manual 4545 – DP2000 Super Systems, Inc. Page # 11 of 17
Revision Level “F” (800 ) 666-4330
14.0 Determine the acceptability of the reading
14.1 The value printed on the chart in Appendix A is a theoretical value, and
some variation can be expected. When a calibration is performed at SSi, we
certify (in writing) that the unit displays within +/- 1 degree of the theoretical
value after it has been calibrated. We would not consider a calibration to be
successful unless it is within +/- 1 degree, however in the case of a field
calibration, this degree of accuracy may or may not be required. The degree
of accuracy that is acceptable is determined by the policy of the person
performing the calibration.
NOTE: Keep in mind that the DP2000 only displays even numbers, and not
tenths of a degree. Therefore, a reading of 18°F could be as low as 17.50 or
as high as 18.49.
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.