KYORITSU 3128 User Manual
Cautionary statement/ errata sheet
Cautionary statement/ Errata sheet
Followings are corrections and additional explanations for KEW3128 Instruction manual.
The contents of this sheet apply to the instrument with firmware ver.1.12 or later.
Specification tale for [Insulation Resistance Tester] on page 10 & 11 of the Instruction manual for KEW3128 is
modified as follows. The lower accuracy limit, display range and out-of-range display at each Voltage Range
are added.
[Insulation Resistance Tester]
Rated Voltage
500V
1000V
2500V
5000V
10000V
12000V
Max value
500GΩ
1.00TΩ
2.50TΩ
5.00TΩ
35.0TΩ
35.0TΩ
Accuracy
400k to 50GΩ
±5%rdg±3dgt
800k to 100GΩ
±5%rdg±3dgt
2M to 250GΩ
±5%rdg±3dgt
4M to 500GΩ
±5%rdg±3dgt
8M to 1TΩ
±5%rdg±3dgt
8M to 1TΩ
±5%rdg±3dgt
50G to 500GΩ
±20%rdg
*Accuracy is
not guaranteed
with setting of
250V or less.
100G to 1TΩ
±20%rdg
250G to 2.5TΩ
±20%rdg
500G to 5TΩ
±20%rdg
1T to 10TΩ
±20%rdg
1T to 10TΩ
±20%rdg
10T to 35TΩ
Values are
displayed, but
accuracy isn’t
guaranteed.
10T to 35TΩ
Values are
displayed, but
accuracy isn’t
guaranteed.
Display Range
400k to 999k
1.00M to 9.99M
10.0M to 99.9M
100M to 999M
1.00G to 9.99G
10.0G to 99.9G
100G to 600G
800k to 999k
1.00M to 9.99M
10.0M to 99.9M
100M to 999M
1.00G to 9.99G
10.0G to 99.9G
100G to 999G
1.00T to 1.20T
2.00M to 9.99M
10.0M to 99.9M
100M to 999M
1.00G to 9.99G
10.0G to 99.9G
100G to 999G
1.00T to 3.00T
4.00M to 9.99M
10.0M to 99.9M
100M to 999M
1.00G to 9.99G
10.0G to 99.9G
100G to 999G
1.00T to 6.00T
8.00M to 9.99M
10.0M to 99.9M
100M to 999M
1.00G to 9.99G
10.0G to 99.9G
100G to 999G
1.00T to 9.99T
10.0T to 35.0T
8.00M to 9.99M
10.0M to 99.9M
100M to 999M
1.00G to 9.99G
10.0G to 99.9G
100G to 999G
1.00T to 9.99T
10.0T to 35.0T
Out-of-range
display
Upper limit
<400kΩ
<800kΩ
<2.00MΩ
<4.00MΩ
<8.00MΩ
<8.00MΩ
Lower limit
>600GΩ
>1.20TΩ
>3.00TΩ
>6.00TΩ
>35.0TΩ
>35.0TΩ
Short-circuit current
Max 5.0mA
Leakage current
0.01nA∼
Output current
1mA or more,
1.2mA or less
under a load of
0.5MΩ
*Should be
500V or more
1mA or more,
1.2mA or less
under a load of
1MΩ
1mA or more,
1.2mA or less
under a load of
2.5MΩ
1mA or more,
1.2mA or less
under a load of
5MΩ
0.15mA or
more, 0.25mA
or less under a
load of 10MΩ
0.15mA or
more, 0.25mA
or less under a
load of 12MΩ
Note: The Lower limit value within the Display Range is shown when the test leads are short-circuited and the
Upper limit value within the Display Range is shown when measured values exceeds the Display Range.
P12 Additional explanation to [Ammeter]
[Ammeter]
Measuring Range
0.00nA∼ 2.40mA
Minimum resolution 0.01nA
(determined by resistance and voltage values)
Depending on the effective range
of insulation resistances