SETRA
OPERATING INSTRUCTIONS
SERIES DPT 209
PRESSURE TRANSDUCERS
1.0 GENERAL INFORMATION
Every Model DPT209 has been tested and calibrated before shipment.
Setra Systems DPT209 pressure transducers sense gauge pressure and convert this pressure difference to a proportional high level analog output. Three standard output and excitation versions are offered:
Excitation |
Output |
9 to 28 VDC |
4 to 20mA – (Must Observe Polarity) |
9 to 30 VDC |
0.5 to 5.5 VDC – (Reverse Excitation Protection) |
4.9 to 8.1 VDC |
0.5 to 4.5 VDC – (No Reverse Wire Protection) |
2.0MECHANICAL INSTALLATION
2.1Media Compatibility
Model DPT209 transducers are designed to be used with any gas or liquid compatible with 17-4 PH stainless steel. Never totally submerge the unit in any liquid.
2.2 Environment
The operating temperature limits of the DPT209 are –40° to +185°F (-40 to +85°C). The compensated temperature range is –4 to +176°F (-20 to +80°C)
2.3 Pressure Fittings
Typically, standard pipe fittings should be used. However, for pressure ranges in excess of 500 psig, we suggest the use of a sealant such as Loctite Hydraulic Sealant. Excessive torquing of metal fittings may cause a slight zero shift. The use of plastic fittings typically results in no noticeable zero shift. Torquing does not appreciably affect linearity or sensitivity.
2.4 Tube Stub Welding Instructions
Standard welding practices should be followed. Caution must be taken to protect the sensor against current paths that could damage the circuit board. Apply a heat sink between the weld zone and the sensor that is large enough to protect the sensor from overheating. Failure to use a heat sink may damage the housing seal or circuit board.
2.5 Venting
Because the reference pressure in a sealed gage transducer will vary due to changes in temperature and will affect overall accuracy (especially in units of less than 500 psig range), all DPT209 Series transducers are available as vented or sealed to atmosphere.
Vented units are ordered as PSIG ranged units. Sealed units are ordered as PSIS range units. The DPT209 PSIG transducers are vented through the cable. Hirschmann PSIG transducers are vented through the connector. Packard PSIG units are vented through a porous filter plug supplied on the unit.
3.0 ELECTRICAL INSTALLATION
The Model DPT209 is available in four electrical terminations:
1.Two foot Cable
2.Packard Connector
3.Hirschmann Connector
4.Conduit Adapter, 1/2 inch
3.1 Voltage Output Units
The Model DPT209 voltage output is a 3-wire circuit. If the DPT209 is supplied with 2 feet of cable, the electrical connection is as follows:
Red |
= |
+ Excitation; connect to appropriate power supply |
Green |
= |
+ Output; connect to controls or monitor. |
Black |
= |
Common; connect to return of power supply. |
White |
= |
-Output; connect to controls or monitor. |
Shielding = Connected to system or earth ground.
3.2 Current Output Units
The Model DPT209 (current output) transducer is a true 2-wire, 4-20 mA current output device and delivers rated current into any external load of 0-800 ohms. The 4-20 mA current output units are designed to have current flow in one direction only - PLEASE OBSERVE POLARITY. We suggest that the electrical cable shield be connected to the system’s loop circuit ground to improve electrical noise rejection. The electrical connection is as follows:
Model C209
Setra
Transmitter
(4-20 mA)
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red |
+ |
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black |
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Load |
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Power Supply |
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(Monitor) |
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The DPT209 has a 2-wiere cable, where red is positive and black is negative.
3.3 Hirschmann or Packard Connectors – Voltage and Current Output
If the unit is provided with a Hirschmann or a Packard Connector, pin number designation are as follows:
Hirschmann Connector
Top View: Hirschmann Connector
Type: G4A1M#931807-106
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Voltage Output |
Pin # |
Function |
1+ Excitation (connect to appropriate power supply
3+ Output (connect to controls or monitor
2Common (connect to return of power supply)
Current Output
Pin # |
Function |
1Positive
2Negative
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