Isoprime User’s Guide
Version 1.02 IsoPrime100 User’s Guide Page 76 of 219
Electron Voltage Short Circuit
Electron energy voltage < 10 V with > 5mA of emission. Filament to source
leakage or short circuit (only occurs when the filament is hot).
Electron voltage < 10 V with < 5mA of emission. Electron voltage circuit
malfunction.
Electron voltage > 6 V below requested value. Electron voltage circuit
malfunction
Trap voltage < 17 V with trap current of at least
50µA in apparent regulation. Trap to source leakage current. Confirm by
requesting zero trap current and
monitor trap current.
Trap current > 100 µA higher than requested value. Trap to source leakage
current. Confirm by requesting zero trap current and monitor trap current.
Low trap current with 0.12-0.45 A filament current reading. Open circuit
filament.
Incorrect trap current with < 0.12 A filament current. Filament circuit
malfunction.
Low trap current with filament not in limit. Excessive resistance in filament
leads, poor filament or filament circuit malfunction.
No trap current requested. Filament switches off.
Low trap current with maximum filament current.
Poor or misaligned filament, open circuit trap lead,
electron voltage setting too low.
Supply voltage < 19 V. Power supply or circuit malfunction causing filament
circuit to switch off
Supply voltage > 25 V. Circuit malfunction causing filament circuit to switch
off
TUNE FILES
The current tune settings, source parameters and acquisition map may be saved in a tune file.
The name of the current file is displayed in the title bar. If changes have been made to the