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Technical Specifications

Absolute Pressure Input Characteristics

Absolute Pressure Field Unit - 23702 Wireless Instrumentation

Model Upper Range Limit (URL) Overload Limit Safety Limit

Absolute Pressure Field Unit

Models WI-AP-I WI-AP-E WI-AP-E-Y

WI-AP-x-x-30 30 PSIA 2 BAR 60 PSIA 4 BAR 500 PSIA 34 BAR WI-AP-x-x-250 250 PSIA 17 BAR 500 PSIA 34 BAR 1500 PSIA 103 BAR

Accuracy

0.1 % 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.

Stability

Combined zero and span stability: less than 0.1% of sensor URL per year at 70°F

Output Resolution

24 bit Analog to Digital conversion - see specification sheets for the Base Radio and Analog Output Modules for descriptions of analog and digital output options.

Operating Ambient Environment

-40° F to +250° F (-40° C to +121° C) process temperature, steady state -40° F to +230° F (-40° C to +110° C) ambient temperature sensor -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
Note: Picture shown for reference and is not actual model

Absolute Pressure Field Unit Description

Power Characteristics

Wireless Instrumentation WI-AP Product Description 08/29/07 Self-contained power ‘C’ Size 3.6 V lithium battery The Absolute Pressure Field Unit is self powered and contains a 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 options. The field units are completely free of field wiring for power and signal transmission, making them ideal for automating remote pressure monitoring in all types of industrial environments. 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. . Up to twenty (20) year battery life (depends on sample rate and RF update rate), field replaceable

RF Characteristics

902 MHz – 928 MHz Frequency Hopping Spread Spectrum (FHSS), FCC certified ISM license-free band Up to 3000’ range from Base Radio with clear line of sight; 500’ to 1000’ typical range with obstructions The RF module in each Field Unit is individually tested and calibrated over the full temperature range to ensure reliable wireless operation

Self-Diagnostics

Low battery alarm – indicates the need to replace the battery (approximately one month warning) Contains extensive self-checking software and hardware that continuously monitors the operation. Any sensor or device parameter out of spec is identified and reported

Materials of Construction

Type 316 stainless steel base and diaphragm Standard ½” MNPT (other options available) GE Lexan® cover. V-0 rating and UV stable