20
Part Names and Functions
1.3 Part Names and Functions
Front (IR5051)
Display (p. 22)
Operation
keys (p. 21)
MEASURE key
Rotary switch
(p. 22)
Communications
port
Measurement
terminals
MEASURE key
(Live line warning
display)
Starts and stops the insulation resistance measurement.
Blinks in the following cases:
• When a voltage is generated
• When a voltage of 30 V or more is input
• During discharge
Measurement
terminals
+ terminal: Connect the red test lead to this terminal.
− terminal: Connect the black test lead to this terminal.
GUARD terminal: Connect the blue test lead to this terminal.
Communications port
Connect the DT4900-01 communications package (option) to
download saved data to a PC.
See “5.6 Communicating with PC” (p. 79).
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