Troubleshooting

• 1: SpecMan4EPR
• 2: Magnet

1 - SpecMan4EPR

Software Installation

Re-Installing SpecMan4EPR

Debugging

Debugging the LabJack Interface

Software Installation

Re-Installing SpecMan4EPR on new Hardware

In case have to re-install SpecMan4EPR on a new computer, follow these steps (assuming you saved a previous copy of SpecMan4EPR):

1. Start by creating two folders in the main directory (C:).
   1. C:\SpecMan4EPR
   2. C:\SpecManData
2. Copy the SpecMan4EPR application (SpecMan4EPR.exe) into the application directory (C:\SpecMan4EPR)
3. Inside the SpecMan4EPR folder create three subfolders:
   1. cfg - to store configuration files
   2. pattern - to store pattern files
   3. tpl - to store pulse program templates
4. Double click the SpecMan4EPR icon to start the application. Since no license is installed, SpecMan4EPR will create a LIF File. To obtain a license please send this file to support@bridge12.com and include any additional information about your spectrometer (e.g. serial number)
5. You will receive a license file (Specman4EPR.nlic). Move this file into the SpecMan4EPR directory. This will activate your software license and you will be able to use SpecMan4EPR.

Debugging

Serial Communication

Serial communication in SpecMan4EPR is most conveniently debugged in the built-in script editor.

LabJack DAQ Interface

To debug communication with the LabJack interface and to enable the verbose mode for the LabJack interface follow these steps:

1. In SpecMan4EPR to the the Script tab
2. Select the LABJACK interface from the dropdown menu
3. Select S00
4. From the command dropdown menu select .echo
5. Enter 1 in the empty text box
6. Hit ENTER.

Once the verbose mode is enabled, open the Log Window by clicking the View log window in the toolbar to the right. For clarity, you can clear the log by right clicking with the mouse into the window and click Clean Log. This will clear all old messages.

2 - Magnet

Magnet Control

Recovering after Magnet Quench

Recovering after Magnet Quench

A magnet quench can occur for several reasons, such as sudden loss of electricity, or the cooling water supply shuts down. If the helium compressor shuts off while the magnet coils are charged, or are in persisten mode, the user has about 8 minutes left until the magnet coils have reached about 8 K and the magnet will quench. However, in contrast to a wet magnet, this is rather uneventful. The temperatures of all sensors will suddenly increase. Once electricity (or cooling water) is back, the helium compressor will restart automatically and the magnet will be cooled. If the compressor doesn’t restart automatically, it has to be done manually.

Once the magnet has reached its base temperature it is again safe to operate the system. The temperatures can be observed either directly on the temperature monitor or through the systems logger. Typical temperatures are:

To energize the magnet again follow these steps:

1. Make sure the helium compressor is running and that the magnet has reached its base temperatures (see table above).
2. The power supply may show the message HEATER switched off at XX.XXX Amps. This indicates, the magnet was in persistent mode when the quench occurred. However, the user can safely ignore this message. To clear this message:
   1. If the power supply is in remote control mode, take the power supply back into local front panel operation mode by pressing the button labeled REMOTE.
   2. Press the HEATER button to activate the switch (the LED light will come on). Wait for a few seconds.
   3. Press the HEATER button again to switch the heater off.

Alternatively, the user can just restart SpecMan4EPR and start using the magnet.