SENVA P4 Precision Dry Pressure Instruction Manual

SENVA P4 Precision Dry Pressure

Optional versatile probe for both remote or duct mount

• RP-6 Remote/duct probe, 6”
• Accepts both 1/8” and 1/4” tubing

DIMENSIONS

INSTALLATION

1. Screw mount sensor directly to duct, or in panel using self-tapping screws or attach to a DIN rail (2 possible orientations for DIN mounting, BACK and LEFT SIDE).
2. Plumb air lines to sensor hose barbs(Accepts 1/8” & 1/4” ID tubing). High (+) and low (-) ports are labeled on the sensor.
3. Wire sensor for voltage or current output as shown in the wiring diagrams.
4. Recommendation: Apply power to sensor. With no pressure applied, press the ZERO SET button for 2 seconds. (For best results, temporarily connect high and low pressure ports together while zeroing.)

PRODUCT APPLICATION LIMITATION

Senva products are not designed to be used as the lone device for life or safety applications. Senva products are not intended for use in critical applications such as nuclear facilities, human implantable device or life support. Senva believes a systems approach to safety is necessary for these types of applications. Senva is not liable, in whole or in part, for any claims or damages arising from such uses.

LED STATUS/INDICATION

• LED indicator will flash every 5 seconds for normal operation.
• LED indicator will rapidly flash when applied pressure greater than 110% of selected range.
• LED indicator will rapidly flash momentarily when zeroing process is complete.

IMPORTANT WARNINGS

• Only qualified trade installers should install this product
• This product is not intended for life-safety applications
• Do not install in hazardous or classified locations
• The installer is responsible for all applicable codes
• De-energize power supply prior to installation or service
  Forming a “drip-loop” (allowing tubing to dip below the level of the sensor hose barbs) is recommended to protect the sensor from damage caused by condensation.

TROUBLESHOOTING

Pressure reading error

| Verify control panel software is configured for correct output scaling.
Verify switch settings.
Verify tubing is not pinched or leaking.
Possible contamination. Ensure sensor is used only on dry air or nitrogen.

SPECIFICATIONS

0-10VDC
Fixed Ranges                                Multiple Fixed Ranges 0.05”w.c. up to 50”w.c. models (Inches of w.c. and Pascals) 25 Pa up to 5000Pa models
Operating Temperature| Operating range

Compensated range

| -4 to 140F (-20 to 60ºC)

-4 to 140F (-20 to 60ºC)

Media compatibility|  | Dry, oil-free air, N2
Sensor Type|  | MEMS silicon piezoresistive; precision calibrated
 | Accuracy 1.00%| ±1.00% of range
 | Accuracy 0.25%(2)| ±0.25% of range; 7-point NIST calibrated
 | Accuracy 0.50%(2)| ±0.50% of range; 7-point NIST calibrated
 | Zero Tolerance| Included in accuracy specification
 | Span Tolerance| ±1.00%
Sensor Performance:  Zero Drift (1 year) 0.004”WC/year max. 0.4% for units

0.5”w.c.

Thermal Shift (Zero and 0.02% FSO/ºC (0.01%FSO/ºF) measured from 22ºC (72ºF) Span)

Overpressure up to 5” models: 41.5”w.c.; 10” models: 133”w.c.; 25” models: 12 PSI Max Static Line Pressure up to 5” models: 41.5”w.c.; 10” models: 133”w.c.; 25” models: 332”w.c.

Burst Pressure up to 5” models: 83”w.c.; 10” models: 166”w.c.; 25” models: 415”w.c. Position Sensitivity Non-position sensitive

Agency

• Compliance
  • CE, RoHS

Enclosure

• Material
  • UL94 5VB, ABS
• Environmental
  • NEMA 1

1. One side of transformer secondary is connected to signal common. Dedicated transformer is recommended.
2. Accuracy includes non-linearity, hysteresis, and repeatability at 70ºF.

TYPICAL APPLICATIONS

• Velocity: Use a pitot tube and plumb high (+) port to total pressure (Pt) connection and low (-) port to static pressure (Ps) connection to directly read Pt-Ps = Pv. Apply correction constant provided by pitot tube manufacturer.
• Duct Static: Install a static pressure pickup tube approximately 2/3 of the way down the discharge air duct and plumb to high (+) port for positively pressurized ducts.

WIRING DIAGRAMS

3 – Wire 4 – 20mA

2 – Wire 4 – 20mA

3 – wire 0-5V and 0-10V

Contact

• senvainc.com
• 1-866-660-8864
• (F)1-503-296-2529 9290
• SW Nimbus Ave. Beaverton Oregon 97008

References

• Senva inc: Gas Sensors, Toxic Sensors, Dry Pressure Sensors, Wet Pressure Sensors, Humidity/Temp Sensors, Current Switches, Current Transducers, Energy Measurement, Relays, Leak Detection, IoT Solutions, Smart Sensors

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