Pre-Installation Test UMSITRAPDS3-1
November 2005
3-2
_
+
mA
+
_
- +
4-20 mA
+
I
O
250
+
_
_
MG00358b
Vdc
1
2
3
4
5
6
1 Transmitter field terminals
2 Analog output terminals
3 Digital milliammeter
4 HART Communicator
5 Controller, recorder, indicator, or other 1-5 Vdc device
6 DC power supply
Note: Loop current can also be shown on the optional transmitter
display in 0-100%.
FIGURE 3-2 Field Test Connections
3.1.1 Test Equipment
TEST EQUIPMENT DESCRIPTION (see Specifications, Section 9.3)
Power Supply 10.5 to 45 Vdc, see Power Supply Requirements, Section 4.3.5
Multimeter:
Current Range: 4 to 20 mA to measure loop current
Voltage Range: 0-50 Vdc to measure power supply and loop voltage
Current Sense Resistor
250 to 1100Ω to support HART digital communications
Configuration Device Model 275 HART Communicator or Model 375 Field Communicator
Pressure Source Dead Weight Tester or similar device.
Note
Test equipment should be 2 to 10 times more accurate than the transmitter
accuracy.
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