T723
Thermocouple Input Isolating, Field
Configurable |
TECHNICAL SPECIFICATION (T723)
|
| Input Span
Range (Max/Min) |
|
See Tables 1 and
2 |
| Leadwire Resistance Effect |
|
<0.25 uV/Ohm |
| Burnout
Detection Current |
|
250nA, max. |
| 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 |
|
0.05% of
span |
| Maximum
Change in Load Effect |
|
0.05% of span |
| Loop Voltage Drop |
|
12VDC @
20mA |
| Stability |
Zero: |
|
±0.02% of span/°C,
max. |
|
Span: |
|
±0.01% of span/°C, max. |
| 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 |
| Cold-Junction Error (Ambient) |
|
J/K/T/E Inputs |
|
0 to 80°C: |
|
1°C,
typical |
|
-40
to 0°C: |
|
3°C, typical |
|
|
|
R/S
Inputs |
|
0
to 80°C: |
|
2°C, typical |
|
-40 to 0°C: |
|
5°C,
typical |
| Response Time |
|
|
100ms, typical; 200ms,
max. |
| Output Ripple |
|
|
0.1% of
span, rms, typical |
| RFI Effect
(5W, 470MHz at 3 Ft.) |
|
<1% of span error,
typical |
| Isolation |
|
|
600V DC or
peak AC max., input to output to case |
| Temperature Range |
|
|
|
Operating: |
|
-40 to
80°C (-40 to 176°F) |
| Weight |
|
|
0.56lbs |
| Agency Approvals |
|
FM approved
intrinsically safe for hazardous locations, certificate No. 2M2A5.AX. |
Calibration
| Input Range: |
J1 |
| Output Range: |
4-20mA |
- Open the access lid on the top of the unit (see Top View
Diagrams).
- Select the output range using switch S6. 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 S5.
- Connect the input to a calibrated thermocouple source.
Connect the output loop to a voltage supply and monitor the output current.
Refer to Terminal Wiring.
- Set the calibrator to the desired minimum.
- Adjust the coarse zero rotary switch to obtain an output
of aproximately 4mA or 10mA. Adjust the fine zero for exact calibration.
- Set the calibrator to the desired maximum and perform
similar adjustments using the coarse span switch and fine span
potentiometer.
- Repeat fine zero and span adjustment for maximum
accuracy
|
|
Field Mounting
The T723
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, hosedirected water
(NEMA 4) or hazardous environments, use model F723. The F723 2-wire transmitter
offers the same wide-ranging features of the T723, but includes a rugged
Explosion Proof (EP) NEMA 4 enclosure with standard, 1/2" and 3/4" FPT ports
for operation in harsh process environments. |
|
