Product Description
713 Two-Wire Transmitter
713 Two-Wire Transmitter
The T713 series has 6 widely adjustable input ranges and 2 output ranges, all of which are field selectable via top accessed DIP switches. The T713 provides 600VDC of isolation with outputs of either 4-20mA or 10-50mA. Current outputs are linear to temperature. Urethane coating of internal circuitry for protection from corrosive atmospheres is included as standard.
The T713 has an 80% zero and span adjustability within any user selected input range. For example, Range 1 of Table 1 specifies 0 to 1000° F with a minimum span of 200° F (1000° – 200° = 800°, or 80%). This 80% adjustability allows the user to field calibrate the unit for the maximum (0 to 1000°) down to any minimum (200°) span (e.g. 740° to 940°) – as long as that adjusted span remains within the selected 0 to 1000°F 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 T713 is useful in any application requiring isolation of a 2-wire loop current from a 3-wire RTD. Typical applications include SCADA and remote data acquisition such as monitoring boiler or custody transfer/pipeline temperatures. The output of the T713 can be used to drive a digital meter for direct display or interface with a computer for monitoring and control applications.
The T713 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 F713 for NEMA 4, FM/CSA/CENELEC approved explosion proof housing.
Calibration
| Input: | Range 1 |
| Output: | 4-20mA |
- Open the access lid on the top of the unit (see Top View Diagrams).
- Select the output range using switch S4. The CLOSED position selects a 10-50mA output. The OPEN position selects a 4-20mA output.
- Select the input range from Table 1 or 2 and configure switches S1 through S4.
- Connect the input to a calibrated 3-wire resistance source and monitor the output current (refer to terminal wiring).
- Set the calibrator to the desired minimum temperature.
- Adjust the coarse zero rotary switch to obtain an output of approximately 4mA or 10mA. Adjust the fine zero for exact calibration. Note that it may be necessary to switch coarse zero up or down one position.
- Set the calibrator to the desired maximum temperature and perform similar adjustments using the coarse span switch and fine span potentiometer.
Field Mounting
The T713 is designed for installation in industrial field environments. A sealed, diecast aluminum housing protects against corrosion, moisture, dust and electrical noise such as radio-frequency (RFI) and electromagnetic (EMI) interference. All circuit boards are urethane coated for environmental protection and FM approval.
For protection against extreme moisture, hose directed water (NEMA 4) or hazardous environments, use FieldPak model F713. The F713 2-wire transmitter offers the same wide ranging features of the T713, but includes a rugged EP/NEMA 4 enclosure with standard, 1/2″ and 3/4″ FPT ports for easy hookup and operation in harsh process environments.
TECHNICAL SPECIFICATION (T713)
Input Span Range (Min/Max)
See Tables 1, 2 (in datasheet)
Excitation Current
1mA, typical
Leadwire Resistance Effect
1% of span error with up to 40 Ohms/lead
Output Span
4-20mA/10-50mA, switch selectable
Minimum Output Current
3.3mA, typical
Maximum Output Current
- 4-20mA: 24mA, typical
- 10-50mA: 58mA, typical
Supply Voltage Range
- 4-20mA: 12 to 80VDC
- 10-50mA: 12 to 60VDC
Maximum Change in Supply – Voltage Effect
0.05% of span
Maximum Change in Load Effect
0.05% of span
Loop Voltage Drop
12VDC @ 20mA
Linearizing Accuracy
- T713-0000: ± 0.1% of standard R/T tables, typical; 0.2% max.
- T713-0013: ± 0.21% of standard R/T tables, typical; 0.3% max.
- Stability Zero: ± 0.02% of span/°C, typical, or 2mV, whichever is greater
- Span: ± 0.01% of span/°C, typical
Overall Accuracy
(Includes Linearity, Hysteresis, Stability)
± 0.5% of any adjusted span, max.
Zero and Span Adjustability
80% of any selected range
Repeatability
± 0.05% of span, typical
Response Time
150ms, typical, 400ms max.
Output Ripple
0.1% of span, rms, typical
RFI Effect (5W, 470MHz at 3 Ft.)
<1% of span error
Isolation
600V DC maximum, input to output to case
Temperature Range
Operating: -40 to 80°C (-40 to 176°F)
Weight
0.64lbs
Agency Approval
FM approved intrinsically safe for hazardous locations, certificate No. J.I. 2M2A5.AX (3611).
