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Technical Specifications

Thermocouple Options The Thermocouple is included in the integrated version of the Thermocouple Field Unit, Model WI-TC-I. You may specify any of the common Thermocouple types. Probes are available with either spring loaded or direct insertion fitting with probe lengths of 2.5,” 4.5”, 6” or 9”. Custom Thermocouple lengths can be provided on a special order basis, however non standard probes should use the split architecture. Probe temperature range must also be specified. With the split architecture, the Thermocouple (s) are not included with sensor unit. The Thermocouple (s) must be ordered separately and can be easily replaced in the field.

Wireless Instrumentation

Thermocouple Field Unit - 23702 Thermocouple Field Unit

Models WI-TC-I WI-TC-S Several Thermocouple curves are embedded in the microprocessor including types B,C,E,J,K,L,M.R.S,T and U. A 22 point offset function is available for non standard curve programming and precision trimming of temperature value. Accuracy of Electronics

± 0.1 % of full-scale reading plus 1.8° F (1° C) for thermocouple cold-junction effect at reference conditions ± 0.01 % of reading per °C for ambient temperature effect

Long-Term Stability

Stability deviation per year is less than 0.025 %

Operating Ambient Environment

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

Local Configuration

Integrated LCD display with membrane switch buttons Display rotates through tag number, temperature and RF status

Power Characteristics

Wireless Instrumentation WI-TC Product Description 09/05/07 Self-contained power

Thermocouple Field Unit Description

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

The Thermocouple Field Unit comes complete with a signal conditioner and a RF transceiver operating in the 902 MHz to 928 MHz ISM license-free band. It is battery powered with up to twenty (20) year battery life. Sensors may be integrated (-I), or split (-S) packages. The split architecture package includes one or two discrete contact closure inputs for simple apparatus. The split sensor option enables easy field replacement of probes. Two sensor inputs are available with the split Thermocouple sensor package. Data from the sensor is transmitted to the Base Radio for centralized monitoring and data acquisition. You may specify updates between once per second and once per minute based on your monitoring and control needs 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. Two miles possible with high gain antennae 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) . The unit can operate for up to 20 years using the original factory supplied battery. Contains extensive self-checking software and hardware that continuously monitors the operation. Any sensor or device parameter out of spec is identified and reported