Testing Power Connections; Power And Ground Connections On The Timeprovider 5000 - Symmetricom TimeProvider 5000 User Manual

Chapter 2 Installing
Making Ground and Power Connections

Testing Power Connections

To verify that the power connections to the TimeProvider 5000 are correct, follow
the steps in this section. The connections on the primary power module are referred
to as Power A and Return A. The connections on the secondary power module are
referred to as Power B and Return B. Use a digital multimeter (Fluke 77 or
equivalent) to make the measurements.
1. Remove all fuses that supply power to the unit from the fuse panel.
2. Ensure that no IOC or IMC modules are installed in the unit.
3. Disconnect the -48V battery leads from the unit's power connector terminals. See
the primary and secondary power connections in
battery leads connected to the unit.
Figure 2-17. Power and Ground Connections on the TimeProvider 5000
4. At the chassis end of the battery leads, use the multimeter to measure the
voltage between the following test points:
Test Point
Battery A lead
Battery A lead
Battery A lead
Battery B lead
Battery B lead
5. Reconnect the
terminal connectors.
6. Install the A fuse in the power source fuse panel.
7. Measure the voltage between the
power module. The multimeter should indicate –42 VDC to –56 VDC.
8. Install the B fuse in the power source fuse panel.
9. Measure the voltage between the
power module. The multimeter should indicate –42 VDC to –56 VDC.
62 TimeProvider 5000 User's Guide
Test Point
Battery B lead
Primary: Return A
Earth Ground
Secondary: Return B 0 V
Earth Ground
48V battery A and battery B leads to the
–
48V A and Return terminals on the primary
–
48V B and Return terminals on the secondary
–
Figure 2-17. Leave the Return
Result
0 V
0 V
0 V
0 V
48V A and
–
098-00028-003 Revision A – June, 2011
48V B
–