5-10
RTD Current Source (Resistive) Test
If readings from the RTD are still suspect following the RTD Probe Continuity test, follow
the Instructions below to test the current source on the Termination Board to verify it is
receiving power.
Required
Equipment
•
Totalflow Diagnostics Kit 2017373
•
Digital MultiMeter w/ alligator clip leads
Instructions
Step Procedure
1.
Begin by disconnecting power and communications from XMV if
not already done.
2.
Disconnect RTD from XMV if not already done.
3.
Set DMM to 200 mVDC.
4.
Select RTD Test Resistance value by selecting resistor test
connector from FCU Diagnostic Kit, or make one using a resistor
appropriate for your unit:
•
Substitute RTD Probe wiring by connecting either a 100
OHM or 123 OHM Resistor across connector terminals 3 and
4.
•
Connect a jumper wire between terminals 2 and 3.
•
Connect a jumper wire between terminals 4 and 5.
5.
Clip the positive lead of the DMM to the upper side of the RTD
TEST RESISTOR.
6.
Clip the negative lead of the DMM to the lower side of the RTD
TEST RESISTOR.
7.
Supply power to the unit.
8.
Once running, the measured value across the RTD TEST
RESISTOR should be either:
•
100 OHM Resistor – Min. of 100mv to a maximum of 125mv.
•
123 OHM Resistor – Min. of 123mv to a maximum of 155mv
9.
The RTD measurement temperature on the FCU display should
read either:
•
100 OHM Resistor – 31.0°F to 33.0°F
•
123 OHM Resistor – 140.8°F to 142.8°F
Continued on Next Page
Содержание XRC6490
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Страница 19: ...1 5 Standard Enclosure Cont RC 6790 X Figure 1 2 Model XRC6790 Continued on Next Page ...
Страница 20: ...1 6 Standard Enclosure Cont 18 00 15 52 RC 6890 X 28 81 15 52 28 00 20 09 18 70 Figure 1 3 Model XRC6890 ...
Страница 24: ...1 10 XRC 195 Board Specifications Cont Figure 1 5 Complete View XRC 195 Board Continued on Next Page ...
Страница 41: ...1 27 Totalflow Input Output Modules Cont Figure 1 16 XRC6990 Inside View ...
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Страница 56: ...2 14 AC Charging Unit Installation Cont Figure 2 12 DC Wiring Instructions Figure 2 13 AC Wiring Instructions ...
Страница 63: ...2 21 XRC Communication Jumper Settings and Field Wiring Cont Figure 2 19 Other Field Wiring I O Connections ...
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Страница 86: ...4 12 Replacing XRC 195 Board Cont Figure 4 5 XRC Board Connections ...
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Страница 112: ...5 24 12V Communication Supply Voltage Test Cont Figure 5 9 XRC 195 Communication Wiring ...
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