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Technical Specifications Accuracy

0.5 % of sensor URL over temperature range -4°F to +140°F (-20°C to +60°C)

Submersible Level Field Unit - 23702 Wireless Instrumentation

Stability

Combined zero and span stability: less than 0.5% of sensor URL per year at 70°F

Submersible Level Field Unit

Models: WI-SL-I WI-SL-I-Y6 WI-SL-S-Y6 WI-SL-M Physical Characteristics

Type 316 stainless steel base and diaphragm GE Lexan® cover. V-0 rating and UV stable Sensor body 316L stainless steel with Buna-N seal

Operating Temperature Range

Process Temperature: Extended Sensor -4°F to +140°F (-20°C to +60°C) steady state Process Temperature: Integral Sensor -4°F to +140°F (-20°C to +60°C) steady state Ambient Temperature -4 °F to +140°F (-20°C to +60°C) electronics with full display visibility Humidity Limits: 0 to 95 %, non condensing

Sampling and Transmission Characteristics

The Level Field Unit samples pressure at regular intervals. The data may then be transmitted to the Base Radio for centralized monitoring and data acquisition. The user specifies how frequently the process is monitored and how often data is transmitted. Level – user designates low rate and high rate conditions Sampling rate – user selectable from 1 to 60 seconds (low rate) and from 1 to 30 seconds (high rate) Transmission rate – user selectable from 1 second to 60 seconds (low and high rate) The Wireless Instrumentation Manager can be used for real-time monitoring of the process information. The user can set thresholds to represent “alarm” or abnormal conditions.

Submersible Level Field Unit Description

The wireless submersible level field unit measures hydrostatic level in a vented tank or well. The sensor is cable mounted. It is submersed in the tank liquid, dropping in from the top of the tank, pool or well. Specific gravity correction and all common level units of measure are supported. Self contained and fully wireless, the RF transceiver operates in the 902 to 928MHz ISM license-free band. The Field Unit is a continuous level device that combines sensor, signal conditioner and RF transceiver including a battery power source. The integrated sensor (models WI-SL-I and WI-SL-I-Y6)are supplied fully assembled from the factory. The split sensor (models WI-SL-M and SI-SL-S-Y6) provide for field connection of the sense cable wires and vent tube after sensor immersion. An optional switch monitoring input is also available in the split sensor configuration.

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
Wireless Instrumentation WI-SL Product Description 09/05/07

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

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’ range with obstructions. > 1 mile with auxiliary yagi antenna.

Level Sensor Ranges and Cable Lengths Table 1

The RF module in each field unit is individually tested and calibrated over the full temperature range to ensure reliable wireless operation
Model Upper Range Limit (URL) Proof Pressure Cable Length

Local Configuration

WI-SL-I-5 5 PSIG 10 PSI 15 ft WI-SL-I-10 10 PSIG 20 PSI 30 ft WI-SL-I-15 15 PSIG 30 PSI 40 ft WI-SL-I-30 30 PSIG 60 PSI 50 ft Integrated LCD display with membrane switch buttons Display provides pressure reading and error messages, if applicable Configure sampling and RF parameters locally using membrane switch buttons.