Testing MRU cable at magnet

Procedure

note: This process is only needed for troubleshooting, it is not needed for PM.
Disconnect the 5-pin Switchcraft connector P3 cable going into magnet.
Connect this cable to J3 of the MRU tester.

Figure 1. MRU tester connected at magnet
1 Remove cable from J3

2 Install cable into J3 of tester
Plug DVM onto jacks of MRU tester to check for proper voltage.
important: Failure to properly configure the MRU tester could result in a magnet quench.
With cable to magnet disconnected and MRU tester plugged into MRU, press the red Quench button. Record output voltage for both A and B circuits.
Both LEDs on the MRU tester should light, which indicates:
- Proper operation of the MRU
- Proper operation of the cable between magnet and the MRU
note: There should be a 2.4 volt drop when measuring voltage at the magnet compared to measuring voltage at the MRU.
When complete, press Reset on the MRU. See applicable vendor manual for specific MRU to locate the Reset button.
important: Do not connect cable P3 into the magnet if the LEDs on the MRU tester are illuminated, this will cause a magnet quench.
Reconnect cable at magnet.
Proceed to Finalization.

1	Remove cable from J3
2	Install cable into J3 of tester