Eliminates Ground Loops

Field Configurable Switch Selectable Input Ranges

Integral Cold-Junction Compensation

Wide Ranging Zero and Span Adjustability (80%)

600V Input to Output Isolation

The T723 offers a choice of J/K/T or E/R/S input ranges and 2 output ranges, which are field selectable via top-accessed DIP switches (see Tables 1-2). The T723 provides 600 VDC input to output isolation with outputs of either 4-20mA or 10-50mA. The current output is linear to the equivalent mV thermocouple signal and non-linear to temperature, which is useful in data acquisition systems that utilize linearizing software. Upscale burnout (maximum output with an open thermocouple) is standard.

The T723 has 80% zero and span adjustability within any user selected input ranges shown in Table 1 and 2. For example, Range K1 of Table 1 specifies 0° to 500°C with a minimum span of 100°C (500°-100° = 400°, or 80%). This 80% adjustability allows the user to field calibrate the unit from the maximum (0 to 500°) down to any minimum (100°C) span (e.g. 14°C to 114°C) as long as that adjusted span remains within the selected 0 to 500°C range. The same is true for any user selectable range: all spans are field adjustable from 20% (minimum span) to 100% of the specified range.

Application
The T723 is useful in any application requiring isolation of a 2-wire loop current from a thermocouple input. Typical applications include energy management and data acquisition such as monitoring remote boiler temperatures. The output of the T723 can interface with a digital meter for direct display or interface with a computer for monitoring and control applications.

The T723 is FM approved for intrinsically safe operation in Class I, Division 1, Groups A, B, C, and D; Nonincendive Class I Division 2, Groups A, B, C and D, and Classes II & III, Division 2, Group G hazardous locations when installed per manufacturer’s drawing 790-0024-00. Refer to model F723 for NEMA 4, FM/CSA/CENELEC approved explosion proof, field mount housing.