Omega WPR2 User guide

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WPR2 SERIES

Installation & Operation Instructions

GENERAL INFORMATION

The ACI WPR2 Series Remote Wet to Wet Dierential Pressure Transmitter is designed to reduce installation time and provide mounting exibility, often eliminating the need for additional plumbing and manifolds. The WPR2 can be ordered with standard CMP rated PVC cable or with a metal clad cable. The metal clad cable provides end to end protection of the cables with exible metal conduit, durable and resistant 304 stainless steel construction. The WPR2 accurately measure wet media pressures in a variety of applications. Commonly used for monitoring pumps, these devices are also ideal for measuring pressure across lters, heat exchangers and compressors. The dual remote sensors are based on a ceramic capacitive sensing element with ¼”-18 NPT male (304 stainless steel) ttings. The WPR2’s enclosure opens conveniently to allow it to be recongured between three additional ranges and outputs of 4 to 20 mA , 0 to 5 VDC, or 0 to 10 VDC (default). The dierent congurations in this series can measure both uni or bi-directional pressure ranges as low as 3 psi and as high as 300 psi, depending on the unit.

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Precautions:

• Do not switch pressure range and output mode when power is on. Make sure to power o the unit rst, then move jumpers to the correct positions and then power on the transmitter.

• Do not apply any external voltage to zero terminals.

• Do not replace pressure sensors with any other sensors. Do not interchange the high and low sensors. The high and low sensors are specically calibrated to the WPR2 unit.

Any changes to the sensors will void the product warranty

MOUNTING INSTRUCTIONS

The WPR2 is supplied with 4 mounting anges. The mounting anges must be installed onto the bottom of the enclosure. Align the mounting anges with the threaded insert on the bottom of the enclosure. Insert and tighten down the screws.

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Find a suitable location for the enclosure. Drill pilot holes for the (4) mounting screws. Use the enclosure ange as a guide, or use the dimensions listed in FIGURE 1 (p. 1) to measure out.

Output Signal (SW8)

Output Mode (SW7 Position 2)

Supply Voltage Wire Connection

Vout 0-5 VDC (5V) VAC/VDC V+ COM VOUT

Vout 0-10 VDC (10V) VAC/VDC V+ COM VOUT

mA 4-20 mA VDC V+ ----- IOUT

mA 4-20mA VAC V+ COM IOUT

Current Output Voltage Output

WPR2 Terminals

V+

IOUT VOUT

COM

ZERO

WPR2 Terminals

V+

IOUT VOUT

COM

VDC Power Supply

Com

Current

Meter

Relay

VDC/VAC Power Supply

Com

Voltage

Meter

Relay

ZERO

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WIRING INSTRUCTIONS

PRECAUTIONS

• Remove power before wiring. Never connect or disconnect wiring with power applied.

• When using a shielded cable, ground the shield only at the controller end. Grounding both ends can cause a ground loop.

• It is recommended you use an isolated UL-listed class 2 transformer when powering the unit with 24 VAC. Failure to wire the devices with the correct polarity when sharing transformers may result in damage to any device powered by the shared transformer.

• If the 24 VDC or 24VAC power is shared with devices that have coils such as relays, solenoids, or other inductors, each coil must have an MOV, DC/AC Transorb, Transient Voltage Suppressor (ACI Part: 142583), or diode placed across the coil or inductor. The cathode, or banded side of the DC Transorb or diode, connects to the positive side of the power supply. Without these snubbers, coils produce very large voltage spikes when de-energizing that can cause malfunction or destruction of electronic circuits.

Open the cover of the enclosure. ACI recommends 16 to 26 AWG twisted pair wires or shielded cable for all transmitters. Twisted pair may be used for 2-wire current output transmitters or 3-wire for voltage output. All wiring must comply with local and National Electric Codes. After wiring, close the cover.

WPR2

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VFD

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Each WPR2 unit can be configured to three output modes: 4-20mA, 0-5V and 0-10V. Use the Wiring Connections table to determine the proper wiring for your application. See TABLE 1 for Output Mode and Output Signal switch positions.

Note: The WPR2 units are shipped from the factory set up with a 0-10 VDC output.

ZERO FUNCTION

The WPR2 unit should be “ZEROED” before pressure transducers are installed on the pipes. The Auto zero button and remote zero are both used to cancel out the offsets caused by installation and sensor drift.

Note: Make sure a minimum of 10 minutes of warm-up time elapse before adjustment to the ZERO. The Zero adjustment must be performed with NO pressure applied to both sensors.

Directions:

• Shut off your main pressure valve and open a shutoff valve with hose drain to equalize the pressure in the line to your atmosphere.

• Remove the sensors from the system to remove pressure from each sensor to achieve equal pressure.

• Push “ZERO” button or “SHORT ZERO PIN” for 2 seconds to “COM PIN” before installation or when it is necessary.

For units with LCD display, “ZERO” icon will be on when the unit enters zero mode. If zeroing process is successful, the “ZERO” icon will flash twice.

• Reapply the pipe tape, thread sealant, or pipe compound before sensor installation.

PRESSURE CONNECTIONS

The WPR2 Series have 1/4”-18NPT male ttings. The sensors are labeled “SENSOR HIGH” and “SENSOR LOW”. Make sure the sensors are wired to the corresponding terminal block inside the housing. Otherwise, ACI will not guarantee the accuracy specications. DO NOT REPLACE SENSORS WITH ANY

OTHER SENSORS. THE WPR2 UNITS ARE CALIBRATED WITH THE HIGH AND LOW SENSORS SUPPLIED WITH THE UNIT. Standard pipe ttings and installation procedures should be used during installation.

Install pipe tape, thread sealant or other suitable pipe compound when connecting the sensor to the pressure source or any of the accessories. Recommended torque specication is 150 in lbs (16.95 Nm). If after connecting the pipe, the unit outputs out-of-range signal OVR on display only, turn o the unit, disconnect the pipe or shut down the valves immediately and check the pressure input with a gauge or other test instrument.

Note: ACI recommends to mount the pressure transducers on the top side of the pipe. Side mounts are also acceptable. Refrain from mounting underneath the pipes so that any moisture, sediments, or other contaminants cannot run down or drip directly onto the sensor.

A Pressure Snubber is included with each sensor to dampen pressure surges. A pigtail siphon should be used to lower the media temperature below 257°F (125°C) to prevent damage to the pressure sensor.

INPUT RANGE ADJUSTMENT

• Do not switch pressure range and output mode when power is on. Make sure power to the unit is o. Failure to do so will not allow any new switch settings to take place.

• Choose dierential range based on the expected dierential pressure in your application. Move switches to the correct positions and then power on the transmitter.

The WPR2 can operate in either unidirectional mode (0 – X PSI) or bidirectional mode (± X PSI). The unit will be set at unidirectional mode after factory calibration. Refer to TABLE 2 (p. 5) and FIGURE 5 (p. 5).

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Unidirectional Mode

FIGURE 5: SWITCH SETTINGS

-300 to 300 PSI

UNI

-30 to 30 PSI

• DIP switch SW7 position 1 set at UNI side.

• DIP switch SW7 positions 4 and 5 are for Range Selection

Bidirectional Mode

• DIP switch SW7 position 1 set at BI side.

• DIP switch SW7 positions 4 and 5 are for Range Selection.

[UNIDIRECTIONAL] WPR2-30

0 to 30 PSI

BAR

12345

[UNIDIRECTIONAL] WPR2-100

0 to 100 PSI

BAR

12345

[UNIDIRECTIONAL] WPR2-300

0 to 300 PSI 0 to 150 PSI 0 to 75 PSI 0 to 30 PSI

BAR

12345

[BIDIRECTIONAL] WPR2-30

-30 to 30 PSI

BAR

12345

[BIDIRECTIONAL] WPR2-100

-100 to 100 PSI

BAR

12345

[BIDIRECTIONAL] WPR2-300

[BIDIRECTIONAL] WPR2-30

-300 to 300 PSI

BAR

12345

PSI

10V

UNI

PSI

10V

UNI

PSI

10V

UNI

PSI

10V

UNI

PSI

10V

UNI

PSI

10V

UNI

0 to 15 PSI

BAR

12345

0 to 50 PSI

BAR

12345

BAR

-15 to 15 PSI

BAR

12345

-50 to 50 PSI

BAR

12345

-150 to 150 PSI -75 to 75 PSI -30 to 30 PSI

-150 to 150 P

BAR

12345

TABLE 2: MAXIMUM PRESSURE

ACI Part #

WPR2-30

WPR2-100

WPR2-300

0 to 7.5 PSI

PSI

10V

12345

UNI

PSI

10V

UNI

PSI

10V

UNI

PSI

10V

UNI

PSI

10V

UNI

PSI

10V

UNI

BAR

12345

0 to 25 PSI

BAR

12345

BAR

12345

-7.5 to 7.5 PSI

BAR

12345

-25 to 25 PSI

BAR

12345

-75 to 75 P

BAR

12345

Maximum Pressure (PSI)

100

300

PSI

10V

UNI

PSI

10V

UNI

PSI

10V

UNI

PSI

10V

UNI

PSI

10V

UNI

PSI

10V

UNI

BAR

0 to 10 PSI

BAR

-10 to 10 PSI

BAR

0 to 3 PSI

12345

-3 to 3 PSI

12345

PSI

10V

UNI

PSI

10V

UNI

PSI

10V

UNI

PSI

10V

UNI

PSI

10V

UNI

PSI

10V

UNI

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Note: In Bidirectional mode, a value of 0 inWC will have an output equal to 50% of the output signal range (12mA, 2.5V, 5V).

ADDITIONAL LCD FEATURES

LCD Engineering Units Adjustment

Switch DIP switch SW3 position three to select BAR or PSI. If switched with power on, unit change will not take place until power is cycled.

“ERROR”

“ERROR” icon will be on when dierential pressure is out of range.

“OVR”

“OVR” icon will be on when gage pressure is out of range on either the high or low port.

TROUBLESHOOTING

PROBLEM SOLUTION(S)

• Verify the HIGH Sensor Voltage is between 0.5 VDC (0 PSI) and 4.5

“ERROR” icon on Display will be on when dierential pressure is out of range. The dierential pressure could be lower or higher than the selected range.

“ORV” icon on Display will be on when the input pressure is > than Max Line Pressure. Check pressure input with a gauge or other test instrument. The WPR2-300 Series is available for pressures over 100 PSI.

Output reading @ 4mA or 0 VDC all the time.

Erroneous Readings.

Output signal reads half with no pressure applied. ie: 5V output on a 0-10V selection.

VDC (Max Line Pressure). When measuring from the HIGH Sensor terminal block “GND (Black Wire)” to “OUT (White Wire)”. If out of range call ACI for Technical support.

• Verify the LOW Sensor Voltage is between 0.5 VDC (0 PSI) and 4.5 VDC (Max Line Pressure). When measuring from the LOW Sensor terminal block “GND (Black Wire)” to “OUT (White Wire)”. If out of range call ACI for Technical support.

• Verify in Uni-Directional Mode that the HIGH Sensor Voltage is ≥ the LOW Sensor Voltage. If the voltage is anything dierent call ACI for Technical support.

• Verify proper Supply Voltage at the transducer meets the Product Specications.

• Verify 5 VDC Reference voltage across “VIN (Red Wire)” to “GND (Black Wire)” terminals for both the HIGH & LOW Sensor terminal blocks. If voltage is anything dierent than 5 VDC call ACI for Technical support.

• Bleed Air from System.

• Repeat the Auto Zero calibration on page 4.

• Verify SW7 #1 is set to UNI. Cycle power to conrm the change.

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PRODUCT SPECIFICATIONS

Supply Voltage:

Supply Current:

Output Signals:

Response Time (0-100% FSO): 8 seconds

Output Update Rate: 1 second

Output Load Resistance: 4 to 20 mA: 500 ohms maximum | 0-5 VDC/0-10 VDC: 5K ohms minimum

Warm Up Time: 15 minutes (wait 15 minutes before zeroing)

Operating Temperature:

Compensated Temperature Range: 32 to 140°F (0 to 60°C)

Storage Temperature: -13 to 176ºF (-25 to 80ºC)

Operating Humidity: 10 to 90% RH non-condensing

Proof Pressure: A/WPR2-30 Series and A/WPR2-100 Series: 3X FS | A/WPR2-300 Series: 2X FS

Burst Pressure: 1500 psi

Media Types: Any liquids or gases compatible with Neoprene seal

Process Fitting Material: 304 SS

Process Fitting Size: 1/4"-18 NPT Male; Pressure Snubber included for light oils/water

Transducer Cable Rating | Connector Type:

Metal Clad Rating: Continuously interlocked Type 304 stainless steel core

Enclosure Rating: NEMA 4X/IP66

Recommended Torque Specication: 150 in lbs (16.95 Nm)

WARRANTY

The ACI WPR2 Series is covered by ACI’s Five (5) Year Limited Warranty, which is located in the front of ACI’S SENSORS & TRANSMITTERS CATALOG or can be found on ACI’s web site: www.workaci.com.

4 to 20 mA Output: 250Ω Load: 18 to 36 VDC | 500Ω Load: 20 to 36VDC | 0 to 5 / 0 to 10 VDC Output: 16 to 36 VDC, 21.6 to 26.4 VAC, 50/60 Hz

4-20 mA Output: 24 mA minimum 0-5 VDC | 0-10 VDC Outputs: 6 mA maximum

2-wire: Linear 4-20 mA DC Current (eld selectable) | 3-wire: 0-5 VDC; 0-10 VDC

(default)

Transducer: -40-257°F (-40-125°C) | Electronics/Housing/Cables: 32-167°F (0-75°C)

Type CMP – Plenum Rated (UL Standard 444), NEC Article 800 | Packard Connector

W.E.E.E. DIRECTIVE

At the end of their useful life the packaging and product should be disposed of via a suitable recycling centre. Do not dispose of with household waste. Do not burn.

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Automation Components, Inc.

2305 Pleasant View Road | Middleton, WI 53562 Phone: 1-888-967-5224 | Website: workaci.com

Version: 22.0

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