User Manual
Insulation Multimeters
Performance Test
27
I Nominal Test
The following test verifies the ability of the UUT to maintain the nominal insulation
test current while loaded.
1. Connect the Test DMM and Calibrator to the UUT INSULATION terminals as
shown in Figure 8.
2. Set the Calibrator to the Insulation Resistance Test Mode.
3. Set the output resistance on the Calibrator 1 MΩ.
4. Set the Test DMM to measure μA DC
5. Set the UUT to INSULATION, 1000V range.
6. Press on the UUT. The Test DMM reading should be greater than
1000.0 μA.
M
IN
M
A
X
H
O
L
D
R
E
L
%
m
s
H
z
R
A
N
G
E
d
B
dB
a
c
+
d
c
a
c
+
d
c
a
c
+
dc
a
c
+
d
c
F
n
S
mA
mA
A
mV
V
mV
V
O
F
F
C
A
A
A
A
m
A
C
O
M
V
TEMPERATURE
A
ac
+
dc
Au
t
o
HOLD
L
OGGI
NG
SA
VE
CAN
C
E
L
YES
NO
C
L
E
A
R
M
E
M
VIE
W
SETUP
sHi sLo
Hi Lo
I + I-
!
1
23
456
789
0
Ñ
E
OFF
ON Mode
Aux
Hz
W
A
V
A B C D E F CLR
GH
IJ K
L
MN OP QR
ST UV
WX
YZ
OUTPUT
1500Vpk
max
15Vpk
max
15Vpk
max
HIGH VOLTAGE
DANGER
_
/
!
Calibrator
mA
>1000 mA
UUT
Test DMM
ebp07f.eps
Figure 8. I Nominal Test
Low-Battery Test - DMM Function
The following test verifies the accuracy of the low-battery indicator () on the
UUT during DMM operations.
1. Remove the batteries from the battery compartment on the UUT.
2. Connect a 6-volt adjustable Power Supply between the positive and negative
battery terminals of the UUT as shown in Figure 9.
3. Turn the rotary switch to C.
4. Slowly reduce the Power Supply output while observing the display on the
UUT. Verify that the low-batter indicator () appears when the voltage is at
4.0 V
5. Now slowly increase the Power Supply output while observing the display on
the UUT. Verify that the low-battery indicator () on the UUT goes out at
4.4 V.
6. Slowly reduce the Power Supply output while observing the display on the
UUT. Verify that the UUT displays
at 3.5 V.