MAMAC SYSTEMS PR-282 Manual

SPECIFICATIONS
Inspection
Requirements
Mounting
For Additional Information See PR-282 Data Sheet
INSTALLATION
Model PR-282
Technical Information
TI.282-04
DIFFERENTIAL PRESSURE SENSOR
Inspect the package for damage. If damaged, notify the appropriate
carrier immediately. If undamaged, open the package and inspect
the device for obvious damage. Return damaged products.
Warning:
•Do not use on oxygen service, in an explosive/hazardous
environment, or with flammable/combustible media.
•Disconnect power supply before installation to prevent
electrical shock and equipment damage.
•Make all connections in accordance with the job wiring
diagram and in accordance with national and local
electrical codes. Use copper conductors only.
Caution:
•Use electrostatic discharge precautions (e.g., use of wrist
straps) during installation and wiring to prevent equipment
damage.
•Avoid locations where severe shock or vibration, excessive
moisture or corrosive fumes are present.
•Do not exceed ratings of the device.
Refer to Figure 5 for mounting dimensions.
1. Remove the transducer cover using a Phillips head
screwdriver.
2. Select the mounting location.
3. Mount transducer on a vertical surface with four #8 self-tapping
screws (not provided).
4. Pull wires through bottom of enclosure and make necessary
connections.
5. Replace cover and make pneumatic connections.
•Tools (not provided)
- Digital Volt-ohm Meter (DVM)
- Appropriate screwdriver for mounting screws
- Appropriate drill and drill bit for mounting screws
•Appropriate accessories
•Four #8 self-tapping mounting screws (not provided)
•Training: Installer must be a qualified, experienced technician
Wiring Use maximum 12 AWG wire for wiring terminals. Refer to
Figures 1, 2, 3, & 4for wiring information.
(Wiring Instructions continued on pages 2 and 3.)
RoHS
Accuracy*: ±1% FS
Overpressure: 300% of rated range
Burst Pressure: 500% of rated range
Maximum Static Pressure: 200% of DP range
Supply Voltage: 12-40 VDC
12-35 VAC (VDC output units only)
Supply Current: VDC Units - 10 mA max.
mA Units - 20 mA max.
Load Impedance: 3K ohms max. at 40 VDC (mA output units)
1K ohms min. (VDC output units)
Enclosure: 16 Ga Steel - NEMA 1
Finish: Baked on Enamel - PMS2GR88B
EMC Conformance: EN 55022, 55024, 61000-3-3,
61000-4-2, 3, 4, 5, 6 & 11
Compensated Temp Range: 0°F - 180°F (-18°C-82°C)
T.C. Error: ±0.025%/°F (.03%/°C)
Media Compatibility: Liquid/gases compatible to 316L SS
Port Connection: 1/8” NPT
Environmental: 10-90%RH Non-Condensing
Termination: Unpluggable screw terminal block
Wire Size: 12 Ga max.
Weight: 1.7 lbs. (.75 kg)
*Includes linearity, repeatability, hysteresis, stability and temp compensation
U.S. PATENT NO. 6484587
ORDERING INFORMATION: PR-282-
OUTPUT
OUTPUT
TYPE
SUPPLY
VOLTAGE
PRESSURE
RANGE
1) 0-1 VDC
2) 0-5 VDC
3) 0-10 VDC
4) 4-20 mA
(2-wire)*
1) 0-20 psid
2) 0-30 psid
3) 0-50 psid
4) 0-100 psid
5) 0-200 psid
6) 0-300 psid
7) Custom
A) 24 VDC
B) 24 VAC
1) Direct
OUTPUT
AVERAGING
OUTPUT
CLIPPING
2) Without B) Without
* Available with 24VDC supply voltage only

Model PR-282
Technical Information
TI.282-04
DIFFERENTIAL PRESSURE SENSOR
Page 2 of 4
PR-282 Differential Pressure Transducer with mA Output
TYPICAL APPLICATIONS (wiring diagrams)
Wiring PR-282 Units with mA Output
Input Signal
+
Common
+ +
Shield/Ground
Controller / Meter / Recorder
mA Output Transducer Only 12-40 VDC Power Supply
Input Signal
+
Common
+
Shield/Ground
Controller / Meter / Recorder
mA Output Transducer Only
Figure 1 and Figure 2 illustrate typical wiring diagrams for the PR-282, 4-20 mA, 2-wire, Differential Pressure Transducer.
Figure 1 - Wiring for mA Differential Pressure Transducers with External DC Power
Supply
Figure 2 - Wiring for mA Differential Pressure Transducers where the Controller or
Meter has an Internal DC Power Supply
mA Output
RoHS
The PR-282 pressure transducers with 4-20 mA output units are powered with a 12-40 VDC supply.
The following describes the proper wiring of these pressure transducers with mA output:
1. Remove the terminal block by carefully pulling it off the circuit board.
2. Locate the [+] and [-] terminal markings on the board.
3. Attach the supply voltage to the [+] lead.
4. Connect the 4-20 mA output ([-] terminal) to the controller’s input terminal.
5. Ensure that the power supply common is attached to the common bus of the controller.
6. Re-insert the terminal block to the circuit board and apply power to the unit.
7. Check for the appropriate output signal using a DVM set on DC milliamps connected in series with the [-] terminal.
+
—
Z S

Model PR-282
Technical Information
TI.282-04
DIFFERENTIAL PRESSURE SENSOR
Page 3 of 4
VDC Output
RoHS
The PR-282 pressure transducers with VDC output can be powered with either a 12-40 VDC or 12-35 VAC.
Wiring PR-282 Units with VDC Output
PR-282 Differential Pressure Transducer with VDC Output
TYPICAL APPLICATIONS (wiring diagrams)
Figure 3 and Figure 4 illustrate typical wiring diagrams for the PR-282, 0-5/0-10 VDC Differential Pressure Transducer.
Figure 3 - Wiring for VDC Differential Pressure Transducers when applied with
External AC Supply
+
—
O
Z S
O
—
The following describes the proper wiring of these pressure transducers with VDC output:
1. Remove the terminal block by carefully pulling it off the circuit board.
2. Locate the [+], [-] and [O] terminal markings on the board.
3. Attach the power wires to the [+] and [-] terminals. The [-] terminal is also the negative terminal.
4. Connect the [O] terminal, which is the positive VDC output terminal, to the controller’s input terminal.
5. Re-insert the terminal block to the circuit board and apply power to the unit.
6. Check the appropriate VDC output using a voltmeter set on DC volts connected to the [O] and [-] terminals.
Signal
+
Common
Supply
Neutral
Hot
0
Input Signal
+
Common
+
Shield/Ground
Controller / Meter / Recorder
VDC Output Transducer Only 12-35 VAC Transformer
Figure 4 - Wiring for VDC Differential Pressure Transducers when applied with
External DC Supply
Signal
+
Common
Supply
0
Input Signal
+
Common
+
Shield/Ground
Controller / Meter / Recorder
VDC Output Transducer Only 12-40 VDC Power Supply
Caution: If you are using grounded AC, the hot wire must be on the [+] terminal. Also, if you are using a controller without built-in isolation, use an isolation transformer to supply the PR-282.
Caution: This product contains a half-wave rectifier power supply and must not be powered off transformers used to power other devices utilizing non-insolated full-wave rectifier power supplies.
Caution: When multiple PR-282 units are powered from the same transformer, damage will result unless all 24G power leads are connected to the same power lead on all devices. It is
mandatory that correct phasing be maintained when powering more than one device from a single transducer.

Model PR-282
Technical Information
TI.282-04
DIFFERENTIAL PRESSURE SENSOR
Page 4 of 4
CHECKOUT DIMENSIONAL DATA
CALIBRATION
1. Verify that the unit is mounted in the correct position.
2. Verify appropriate input signal and supply voltage.
3. Verify appropriate configuration range.
CAUTION: Never connect 120 VAC to these transducers.
Never connect AC voltage to a unit intended for DC supply.
Transducer
Operation
This is a rough functional check only.
1. Adjust the pressure to obtain maximum output signal for
appropriate range.
2. Output should be 20 mA or 5 or 10 VDC.
3. Adjust the pressure to obtain minimum output signal.
4. Output should be 4 mA or 0 VDC.
All units are factory calibrated to meet or exceed published
specifications. If field adjustment is necessary, follow the
instructions below.
MAINTENANCE
Regular maintenance of the total system is recommended to
assure sustained optimum performance.
FIELD REPAIR
None. Replace with a functional unit.
WARRANTY
See Data Sheet for additional information.
Figure 5 - PR-282 Differential Pressure Transducer dimensions shown in
inches.
NOTE: The PR-282 is a highly accurate device. For
applications requiring a high degree of accuracy, the use of
laboratory quality meters and gauges are recommended.
TI.282-04
RoHS
Calibration of PR-282 mA Units
1. Connect terminals [+] and [-] to the appropriate power source.
2. Connect the DVM in series on the [-] terminal.
3. Apply low pressure to the unit and carefully adjust the zero
trimmer (Z) to obtain desired low output.
4. Apply high pressure to the unit and adjust span trimmer [S] to
obtain the desired high output pressure.
5. Repeat steps 3 and 4 until desired calibration is achieved.
Calibration of PR-282 VDC Units
1. Connect terminals [+] and [-] to the appropriate power source.
The [-] terminal is also the negative output terminal.
2. Connect the DVM on DC volts across [O] and [-] terminal.
3. Apply low pressure to the unit and carefully adjust the zero
trimmer (Z) to obtain desired low output.
4. Apply high pressure to the unit and adjust span trimmer [S] to
obtain the desired high output pressure.
5. Repeat steps 3 and 4 until desired calibration is achieved.
For Technical / Application Assistance call your nearest office
MAMAC Systems, Inc., reserves the right to change any specifications
without notice to improve performance, reliability, or function of our products.