Super Systems DPC3500 User Manual
Model DPC3500
Continuous Low-Range Dew Point Analyzer
PRODUCT MANUAL
Introduction:
Thank you for selecting Super System’s DPC3500 as your Continuous Low
Range Dew Point Analyzer. Please keep this manual in a secure place for future
reference.
Unpacking
Carefully unpack the unit. The shipment should contain the following
components:
1 Model DPC3500 12” x 10” x 6” Enclosure
1 Low Range Dew Point Sensor
20’ Sensor Wire
1 Remote Mounting Assembly
1 Product Manual
If any of these components are missing or damaged, please contact SSi
immediately at (800) 666-4330.
General Description:
The DPC3500 is designed to detect moisture content in gas samples from -148°F
to +20°F (-100°C to -7°C) dew point. The readings are remotely displayed in
either Fahrenheit or Celsius on the door of the enclosure. In addition to the
visual display, the DPC3500 also provides 4-20mA and RS232 outputs for data
collection.
The DPC3500 is designed to provide continuous readings. Response times are
rapid as long as the sensor remains bathed in a sample gas stream that has a
low dew point. If the sensor is allowed to reach ambient dew point (greater than
40°F or 4°C), it will take a considerable amount of time for it to achieve readings
at the low level. When installed and operated properly, the Remote Mounting
Assembly (supplied by SSi) will allow the sensor to be continuously exposed to a
low-dew atmosphere, which will result in rapid response times.
It is important to note that this analyzer is designed to measure dew point in
gases that are non-corrosive. Some gases that can cause damage or failure to
the sensor are trace amounts of SO
and any other gases that could cause corrosion.
, high concentrations of NH3, Chlorine, HCL,
3
Super Systems, Inc. DPC 3500
Manual # 4551B Page 1 of 5
Model DPC3500
Continuous Low-Range Dew Point Analyzer
PRODUCT MANUAL
Specifications:
Measurement Range -148°F to +20°F (-100°C to -7°C)
Accuracy –75°F to +20°F (–59°C to -7°C) +/- 1.8°F (+/- 1°C)
Accuracy –148°F to –76°F (–100°C to –60°C) +/- 3.6°F (+/- 2°C)
Outputs 4 to 20 mA
Display °F or °C
Sensor Material Metalized Ceramic
Sensor Guard 80µ Sintered Metal Guard
Operating Pressure Vacuum to 5,000 PSIG
Operating Temperature –40°F to +140°F (–40°C to +60°C)
Sample Flow Rate 5-10 SCFH Recommended
Power Requirements 120 VAC, 1 Phase, 60 Hz
Operation:
The DPC 3500’s sensor is manufactured from a ceramic tile that is plated and
vapor-deposited to form a surface that varies its electrical capacitance when
exposed to small changes in water vapor pressure. This information, along with
temperature readings from the tip of the sensor, is used by the microprocessor to
determine dew point.
The dew point of the gas in the sample line is displayed on the front panel. A
switch to the right of the display toggles between showing the readings in
degrees Fahrenheit and degrees Celsius. An indicator light to the right of the
display will indicate the display’s operating mode.
Startup:
The DPC3500 was calibrated before it was shipped from Super Systems, Inc.
After the unit is properly installed (see “Wiring Connections” and “Sample Cell
Installation”), power can be applied immediately. The flow meter on the Remote
Mounting Assembly should be adjusted to provide approximately 5 to 10 SCFH
of sample gas to the sensor. The rate of sample flow does not have any impact
on the measured dew point, but a higher flow rate will result in a faster response
time.
At the time of installation, the sensor will be reading the ambient dew point. It will
take between 3 and 6 hours of immersion in the sample stream for the unit to
thoroughly “dry out” the sensor before it stabilizes at the correct readings. This
delay is only at initial startup when the system is installed for the first time. The
unit is intended to operate with a constant, steady stream of sample gas
continuously bathing the sensor. This will prevent the sensor from absorbing
moisture from ambient air, and will allow for continuous real-time monitoring of
the sample stream.
Super Systems, Inc. DPC 3500
Manual # 4551B Page 2 of 5
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