Rockwell Automation 1748 DataSite Configured Panel Installation Instructions - Manual (Page 39)

Publication 1748-IN001B-EN-P - May 2009
Troubleshooting 39
Step 6: Test temperature compensation cable
Test the temperature compensation cable which is affixed to the side of the
backup batteries ((4) on
page 11 .)
1. With the solar controller completely disconnected from the DataSite
configured panel, make these connections.
a. Use a variable power supply set to 20V DC, 0.5 mA.
b. Connect the + VDC Power supply terminal to ARRAY (+) input
terminal of the solar controller.
c. Common Power supply terminal to ARRAY (-) input terminal of the
solar controller.
2. Measure the voltage at BATT (+) and BATT (-) terminals.
The reading should be about 14.3V when the temperature sensor is at
room temperature.
• When you place the sensor onto the outside of a hot cup of water
(37.8 °C/100 °F), the voltage should rise.
• When you place the sensor onto the outside of a cold cup of water
(4.44 °C/40 °F), the voltage should fall.
• If the measured voltage does not change, there is a problem with the
voltage compensation and the solar controller and compensation
cable should be replaced.