4.2 Functions
Device description
5225 / 04/2022 en
BENNING IT 100
20
4.2
Functions
Use the rotary switch to switch the device on (desired measuring function) or off (“OFF”).
The device confirms each operation of keys and the rotary switch with an acoustic signal.
Invalid keystrokes are confirmed with a double beep. The device switches off automatically after
approx. 10 minutes (APO, Auto-Power-Off). Please note that during a low-resistance or
insulating resistance measurement the timer is disabled (e. g. when the “LOCK” function is
enabled). To switch the device back on after an Auto-Power-Off, first set the rotary switch to
switch position “OFF” and then set the desired measuring function.
4.2.1
“TEST” key
Press the “TEST” key to start the corresponding measurement depending on the switch position
of the rotary switch and to stop it depending on the measuring function (e. g. when the
“LOCK” function is enabled). By pressing and holding the “TEST” key, the respective
measurement remains enabled until the key is released.
• Low-resistance measurement
• Insulating resistance measurement
– Insulating resistance
The device outputs a high testing voltage during the measurement and measures the
insulating resistance with this testing voltage.
– Polarisation index (PI)
– Dielectric absorption ratio (DAR)
4.2.2
High-voltage warning light
The high-voltage warning light is a red LED and lights up in the following cases:
• The device detects the presence of a dangerous voltage (depending on the measuring
function):
– Insulating resistance measurement: >30 V‑AC / V‑DC
– Low-resistance measurement: >2 V‑AC / V‑DC
– Voltage measurement: >30 V‑AC / V‑DC
• The batteries are discharged.
In addition, the high-voltage control indicator is shown on the digital display.
4.2.3
Display illumination key
Press the display illumination key to switch the background lighting of the digital display on or
off. When switching it on, you can choose between 2 functions. It is possible at any time to
switch the background lighting off manually.
• Press once: The background lighting switches off automatically after 30 seconds.
• Press and hold for approx. 2 seconds (confirmation by another acoustic signal): The
background lighting remains switched on until Auto-Power-Off.
