Super Systems DPC2530 - Manual (Page 5)

SSi
Super Systems Inc.
Product Manual #4553 - Model DPC2530 Continuous Dew Point Analyzer
SSi Manual 4553 – DPC2530 Super Systems, Inc. Page # 5 of 17
Revision Level “E” (800 ) 666-4330
extend into the furnace past the HOT face of the refractory. For accurate results, a
designated sample port should be used to extract the sample. SSi offers a sample port
assembly (part number 20263) which is ideal for this purpose. If a designated sample
port is not available, then a clean “burn-off” port on a Gold Probe

, an industry leading
oxygen sensor for atmosphere control, can be used.
Endothermic Generator Sampling: For applications under pressure, the pump should be
switched off and the flow controlled by the small restriction valve on the flow meter. A
flow rate between 1.5 and 2.0 SCFH is ideal. The sample should be taken from the
endothermic gas manifold after the gas has been cooled. NOTE: Allow the sample port
“to blow out any soot” before connecting the sample tube. Failure to do so will
unnecessarily coat the sample tubing assembly and possibly some internal components
with soot, resulting in inaccurate readings and exposing the sensor to potential damage.
HOW IT WORKS –
The dew point sensor is a “dielectric ceramic” that varies its electrical capacitance with
changes in relative humidity. The sensor is mounted in a short probe, which is installed
in a T-fitting that allows the sample gas to flow past the sensor. The tip of this probe
contains the dielectric ceramic relative humidity (RH) sensor, as well as a built in
temperature sensor to determine its dry bulb temperature. Information from both of these
sensors is used to compute the resultant dew point, which is displayed on the digital LED
display.
FACTORY CALIBRATION –
Factory calibration is recommended every six months if the unit is used regularly. SSi’s
calibration is NIST traceable and includes a numbered “Certificate of Calibration”. This
certificate also indicates the accuracy of the analyzer before and after calibration. Please
contact Super Systems at (800) 666-4330 for more information regarding this service.
FIELD CALIBRATION –
It is also possible to calibrate the DPC2530 in the field, which will require the optional
calibration kit (Part Number 31030). The instructions for a field calibration are shown
here, however please feel free to contact Super Systems at 800-666-4330 if you would
like to review the process with us before you begin.
The calibration kit consists of two bottles of saturated salt solution in which each bottle
generates a precise relative humidity percentage (R.H.%) value. One bottle is 11.3%