User Documentation
192661740000/01/06-2020
User displays, menu structure and navigation
Measurement screen
The Measurement screen is where the user selects the rate of voltage ramp (ramp rate) used in the testing
of gas discharge tubes, and the constant current used in the testing of metal oxide varistors and avalanche
breakdown diodes. It is sometimes important during the measurement of GDTs to stimulate the gas inside
before taking a measurement. The GDT Prere setting allows this feature to be turned on. In this mode, the
GDT will be red three times before the measurement is recorded. These settings are retained for when the
instrument is next used after a power down.
Options screen
The Options screen is where various user preferences can be congured. These include whether:
• A passcode is required to access the instrument.
• The system heartbeat (blinking green LED on front of the instrument) is required.
• A sound is required each time a button or control on the LCD is touched.
The System timeout slider allows the user to congure the inactivity timeout from 1 to 5 minutes in minute
increments. If no button or touch control has been activated within the assigned time, the instrument will
enter an automated shut-down (refer to Power o section).