Operation Manual

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Note:
- It is useful to deactivate the COMMANDER, if strong sources of interference might affect the
functioning of the COMMANDER.
4.4.6 Recalling original settings
The following parameters and settings can be set to initial (factory) values:
- Test parameters and limit values
- Contrast
- Prospective short/fault current scaling factor
- Supply system
- Communication port (BENNING IT 120 B only)
In order to recall the original setting press and hold the key and switch on the instrument. “Hard
reset” message will be displayed for a while.
Instrument settings, measurement parameters and limits are set to their initial values as follows:
Instrument settings Default value
Contrast 50 %
Prospective short/fault current scaling
factor
1.00
Supply system TN/TT
Communication port RS 232
Function
Sub-function
Parameter / limit value
CONTINUITY Sub-function: RLOW
LowΩresistance Highlimitresistancevalue:2.0Ω
Continuity Highlimitresistancevalue:20.0Ω
INSULATION RESISTANCE
Nominal test voltage: 500 V
Low limit resistance value: 1 MΩ
IMPEDANCE
(Zl)
(Zs)
Fusetype:noneselected(F)
Fusecurrentrating:noneselected(A)
Fusetrip-outcurrent:noneselected(ms)
RCD Sub-function: RCD Uc
Contactvoltage–RCDUc
Trip-outtime–RCDt
Trip-outcurrent–RCDIII
Autotest–RCDAUTO
Nominal differential current: I
∆N
=30 mA
RCD type and test current starting polarity:< G
Limit contact voltage: 50 V
Nominal differential current multiplier: ×1
LOOP IMPEDANCE TestingRCDswithnominaldifferentialcurrent≥10mA
RESISTANCE TO EARTH
(BENNING IT 120 B only)
Highlimitresistancevalue:50Ω
ILLUMINATION
(BENNING IT 120 B only)
Low limit illumination value: 300 lux