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Technical Specifications

Differential Pressure Input Characteristics Accuracy

Upper (URL) and Lower Range Limit

Differential Pressure Field Unit - 23702 Wireless Instrumentation

Model Maximum Static Pressure

Differential Pressure Field Unit

WI-DP-I-100IN ± 100 in H
2 O 2000 PSI WI-DP-I-300IN ± 300 in H
2 O 2000 PSI WI-DP-I-25PSI ± 25 PSI 2000 PSI WI-DP-I-100PSI + 100, - 25 PSI 2000 PSI WI-DP-I-300PSI + 300, - 25 PSI 2000 PSI ± 0.2 % of sensor URL including combined effects of linearity, hysteresis, repeatability and temperature (applies to standard unit without isolating seals)
NOTE: addition of seals will reduce accuracy due to thermal effects of fill fluid. Special ranges and accuracy may be available on request.

Stability

Less than ± 0.25 % of sensor URL per year at ambient temperature

Differential Pressure Field Unit Description

Static Pressure Effect

± 1.0 % of URL per 1000 PSI typical

Return from Overpressure

± 0.04 %

Sensitivity in Reverse Pressure Direction

Within 1.0 % of forward direction
Wireless Instrumentation WI-DP Product Description 08/30/07 The Differential Pressure Field Unit is self powered and contains a differential pressure sensor, signal conditioning circuitry and a RF transceiver operating in the 902 MHz to 928 MHz ISM license-free band. Remote mount sensors and high-gain antennas are available as special options. The field units are completely free of field wiring for power and signal transmission, making them ideal for automation in all types of industrial environments. The Differential Pressure Field Unit may be operated in any one of four modes: Differential Pressure Orifice Flow Open Channel Flow Level Data from the sensor is transmitted to the Base Radio for centralized monitoring and data acquisition. The user may specify sample and transmit updates between once per second and once per minute. Transmit rate changes can also be triggered based on events that are defined in terms of measurement limits or rates of movement. This function allows for maximization of battery life while ensuring that all important process events are monitored. A variety of seals are available for applications that require them including sanitary clamp seals for pharmaceutical, food and beverage process areas.

Mounting and Positioning Effect

± 1.5 In H
2 O, correctable with position zero

Output Resolution

Digital: see specification sheets for the Base Radio and the Analog Output Modules for descriptions of analog and digital output options

Operating Ambient Environment

-40° F to +220° F (-40° C to +104° C) process connection temperature, steady state -40° F to +185° F (-40° C to +85° C) electronics -4° F to +158° F (-20° C to +70° C) display (full visibility) -40° F to +185° F (-40° C to +85° C) display (with reduced visibility) Humidity Limits: 0 to 95 %, non condensing

Power Characteristics

Self-contained power ‘C’ Size 3.6 V lithium battery Up to twenty (20) year battery life (depends on sample rate and RF update rate), field replaceable