14
Clamp-on Meter Models 501 and 503
4.1.4 Disabling Auto Power Off
(Model 503 only)
•
Start in
OFF
setting, then press and hold
ZERO
button.
•
Power the meter on by selecting a range.
•
The next time the meter is turned on, the auto-off func
-
tion will be re-activated.
4.2 AC Current Measurement
NOTE:
Remove the test leads before measuring current
• Turn the rotary range switch to the
range.
• Press the lever to open the jaws.
•
Clamp the jaws around the conductor to be measured.
• If reading is unstable and is hard to read, push the
HOLD
button and read the measurement.
WARNING:
If overload "
" is displayed,
unclamp the meter immediately .
V
V
A
OFF
Hz
Ω
0
10
20
CA
T II
600V
AUT
O
A
2 0 0
0
!
COM
®
IN
S
T
R
U
M
E
N
T
S
MOD
EL 5
01
CLA
MP
M
ETE
R
HOL
D
H
600V CA
T II
300V CA
T III
400A
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