User Guide

13
Testing the Fuse
WARNING: To avoid electrical shock or injury, remove the test leads and any input signals/voltages before replacing the fuse.
• Turn the rotary selector dial to (ZERO/Ω) position.
• Press and hold the Test Button. If the display shows “FUSE” the fuse is bad and should be replaced. Please see Fuse
Replacement section of this manual.
Testing the Batteries
The meter continuously monitors battery voltage. If the Low Battery indicator is displayed, replace the batteries.
To manually test the batteries:
• Turn the rotary selector dial to the Battery/Voltage position, with no test leads connected.
• Press the Select button to start the battery test. The battery voltage is displayed for 5 seconds. Then the voltage function is
displayed again.
IRT803
OFF
ZERO
ZERO
FUSED
V
Ω
COM
INSULATION
V
1000V
500V
250V
100 V
I
N
S
U
L
A
T
I
O
N
T
E
S
T
E
R
600V
CAT IV 600V
CAT III 1000V
COMPARE
LOCK
PI/DAR
TEST
SELECT
HOLD
Apo
V
TEST
IRT803
OFF
ZERO
ZERO
FUSED
V
Ω
COM
INSULATION
V
1000V
500V
250V
100 V
I
N
S
U
L
A
T
I
O
N
T
E
S
T
E
R
600V
CAT IV 600V
CAT III 1000V
COMPARE
LOCK
PI/DAR
TEST
SELECT
HOLD
Apo
V
Apo
V
Apo
V
SELECT