15
1.3 Names and Functions of Parts
⚝ᒁ
4
3
2
1
7
6
5
10
9
8
1.3 Names and Functions of Parts
“2. Measurement
Procedures”
(p.23)
Front Panel
*This figure is model
EARTH terminal
Connect the black
test lead.
Measure key
Press to measure
insulation resistance.
Rotary selector
Select measurement
functions.
LIGHT key
Press this key to turn on and
off the light.
0
:
ADJ/ M
:
DISPLAY key
• Press this key to perform zero-
adjustment for the low resis-
tance range.
• Press this key to change the
number of display digits for the
insulation resistance range.
IR4052
RELEASE key
Press this key before
measurement to set the
instrument to the 500 V or
1000 V range (to prevent
erroneous application of
the test signal).
COMP key
Press this key to set the compar-
ator’s judgment reference value.
Live circuit indicator
Lights up when voltage remains
between input terminals
LINE terminal
Connect the red test
lead.
IR4051 IR4052
Terminals (on top)
Terminals for control-
ling Model L9788-10.
(p.23)
Display
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