PCI DPT-4001, Operation & Maintenance Manual

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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.