PCI DPT-4001 Manual

DPT-4001Differential Pressure Transducer
Operation & Maintenance Manual
Engineered for accuracy, applicability,durability and simplicity

DPT-4001 Operation & Maintenance Manual
Paragon Controls Incorporated i Revision Level 002
TABLE OF CONTENTS
TABLE OF CONTENTS.............................................................................................................................i
1. INTRODUCTION .............................................................................................................................. 1
1.1. DESCRIPTION........................................................................................................................... 1
1.1.1. Field Connections & Output Load Limitations .................................................................. 1
1.1.2. Dimensions ......................................................................................................................... 2
2. CALIBRATION ................................................................................................................................. 3
2.1. UNIPOLAR ZERO CALIBRATION......................................................................................... 3
2.2. BIPOLAR ZERO CALIBRATION............................................................................................ 3
2.3. SPAN CALIBRATION.............................................................................................................. 3
2.3.1. Output Procedure................................................................................................................ 3
3. TROUBLESHOOTING GUIDE........................................................................................................ 4

DPT-4001 Operation & Maintenance Manual
Paragon Controls Incorporated 1 Revision Level 002
1. INTRODUCTION
This user manual provides information on product features and guides you through all the basic
functions of the DPT-4001.
1.1. DESCRIPTION
The DPT-4001 differential pressure transducer sensor operates on the capacitance principal and is
capable of sensing ultra low differential pressures. In the capacitance cell, a very lightweight,
responsive diaphragm deflects a small amount when pressure is applied. This deflection results in a
change in capacitance, which is then detected and processed electronically into an output signal linear to
the differential pressure. The DPT-4001 can be configured as a Unipolar device (positive differential
pressure only) or a Bipolar device (positive and negative differential pressures). A power indicator
illuminates when power is attached correctly.
1.1.1. Field Connections & Output Load Limitations
Refer to figure below for pressure and electrical connections. Use the chart shown below to determine
load limitations verses loop power supply values.
RECEIVER SUPPLY
POWER
-
+
SPANZERO
LOHI PCIINCORPORATED
CONTROLS
PARAGON
TAG NO.:
W.O.#: 1300 / 1234
POWER: 12-36VDC
OUTPUT: 4-20mA
+
-
RANGE: 0-0.25"W.C.
MODEL: DPT-4001
V = 12 + (0.022 x R )
POWER SUPPLY VOLTAGE (VDC)
LOAD RESISTANCE (OHMS)
0
0
250
10 20 30 36
MIN
12
LOAD
REGION
OPERATING
500
750
1045
40
POWER
-
+
(4-20mA)

DPT-4001 Operation & Maintenance Manual
Paragon Controls Incorporated 2 Revision Level 002
1.1.2. Dimensions
(Mount with #8 screws or 35mm Din Rail)
SPANZERO
LOHI PCIINCORPORATED
CONTROLS
PARAGON
TAG NO.:
W.O.#: 1300 / 1234
POWER: 12-36VDC
OUTPUT: 4-20mA
+
-
RANGE: 0-0.25"W.C.
MODEL: DPT-4001 3.33"
2.90"
1.89"
35mm Din Rail
0.16" Dia.
1.45"
1.68"
1.32"
POWER

DPT-4001 Operation & Maintenance Manual
Paragon Controls Incorporated 3 Revision Level 002
2. CALIBRATION
It is recommended that the Zero Calibration be performed upon installation. Span Calibration is not
affected by the Zero Calibration. The Span of the unit has been factory calibrated and should only be
adjusted using high accuracy test equipment. Refer to section 1.1.1.
Zero Calibration Equipment Required:
- DMM (Digital Multi Meter)
Span Calibration Equipment Required:
- Low pressure air source (Paragon PS-100 or equivalent)
- Manometer for measuring low pressure
- DMM (Digital Multi Meter)
2.1. UNIPOLAR ZERO CALIBRATION
The following zero calibration procedure can be performed without the need to perform a span
calibration.
Step 1. Place a DMM set to current in series with the output between the DPT (-) and the
Receiver (+).
Step 2. Apply power to the DPT.
Step 3. Identify ZERO potentiometer.
Step 4. With no pressure applied, adjust the ZERO potentiometer for a reading of
4±.01mA.
2.2. BIPOLAR ZERO CALIBRATION
The following zero calibration procedure can be performed without the need to perform a span
calibration.
Step 1. Place a DMM set to current in series with the output between the DPT (-) and the
Receiver (+).
Step 2. Apply power to the DPT.
Step 3. Identify ZERO potentiometer.
Step 4. With no pressure applied, adjust the ZERO potentiometer for a reading of
12±.01mA.
2.3. SPAN CALIBRATION
Note: It is recommended that a zero calibration be completed before performing a span calibration.
2.3.1. Output Procedure
Step 1. Place a DMM set to current in series with the output between the DPT (-) and the
Receiver (+).
Step 2. Apply loop power to the DPT.
Step 3. Identify SPAN potentiometer.
Step 4. Apply full scale pressure (Range shown on the transducer label) to the High
Pressure port and adjust the SPAN potentiometer for an output reading of
20±.01mA.

DPT-4001 Operation & Maintenance Manual
Paragon Controls Incorporated 4 Revision Level 002
3. TROUBLESHOOTING GUIDE
TROUBLESHOOTING TABLE
SYMPTOM SOLUTION
1. No output reading 1. Verify Power Supply voltage is correct
2. Verify correct wire connections
3. Verify correct pressure connections
4. Verify input pressure differential with a manometer
5. Contact Factory Service Department.
2. Low output reading 1. Verify Receiver load resistance (See section 1.1.1)
2. Verify input pressure differential with a manometer
3. Contact Factory Service Department.

Paragon Controls Incorporated
P.O. Box 99, Forestville, CA 95436
http://www.paragoncontrols.com
Phone 707 / 579-1424
Revision Level 002