*This figure is model IR4042.
Front
Scale Plate
(Magnified View)
Insulation resistance
scale
AC voltage scale
AC voltage
scale
Insulation
resistance
scale
Indicator
needle
EARTH terminal
Connect the black
test lead
MEASURE key
Press to measure
insulation resistance
Function selector
Select measurement functions
LIGHT key
Press to turn on the light
Effective battery range indicator
Green when battery power is high, red
when batter power is decreasing and
no light when battery is drained
Meter movement
zero adjuster
Live circuit indicator
Lights up when voltage
remains between input
terminals
Scale plate
LINE terminal
Connect the
red test lead
Terminals
(on top)
Terminals
for control-
ling Model
L9788-10