65
Specifications
22.2
Insulation resistance test section
(1) Applicable standard
Conformity with JIS C1302-2002
(2) Rated measuring voltage 500/1000V DC.
(3) No load voltage
Within 125% of the rated voltage.
(4) Rated measuring current 1mA.
(5) Short-circuit current
12mA or less.
(6) Display
0.00~2000 (3 ranges, automatic change-over), 4 digits green LED,
character height 10mm, automatic zero-suppress.
When the input is over or open, the display is flashing with (
).
Insulation resistance is displayed during the test.
At the finish of the test, the resistance value at the time of judgement
is retained (At the NG of insulation or the W-I, I test mode).
Commonly used for the leak current display.
(7) Measuring range and accuracy
Rated measuring
voltage
Display range
Resolution
Accuracy
500V DC
1000V DC
0.00~20.00M
Ω
10k
Ω
±
(2%rdg.+3 digits)
18.0~200.0M
Ω
100k
Ω
±
(2%rdg.+3 digits)
180~2000M
Ω
1M
Ω
±
(5%rdg.+3 digits)
Accuracy: Defined at 23
℃±
5
℃
, 45~75%RH.
(8) Protection for erroneous 600V AC (50/60Hz sine wave) for 10 seconds.
input
22.2.1 Judgement of test result
(1) Judgement system
High and low limit
Digital comparator.
(2) Adjustable range
High limit 0.2M~2000M
Ω
, (low limit + 1 digit or more),
resolution 0.1M
Ω
, (0.2~9.9M
Ω
)/1M
Ω
(10~2000M
Ω
)
Low limit 0.1M~1999M
Ω
, (high limit – 1 digit or less),
resolution 0.1 M
Ω
(0.1~9.9M
Ω
)/ 1M
Ω
(10~1999M
Ω
)
Note
: High limit setting can be ON/OFF.
(3) Judgement condition
High limit value
>
Display value
>
Low limit value ... GOOD
(I-GOOD LED lit up, output ON)
High limit value
≦
Display value ………………………. NG
(I-HIGH LED lit up, output ON)
Low limit value
≧
Display value ………………………. NG
(I-LOW LED lit up, output ON)
Note: Output time of GOOD judgement can be switched to
continuous or 0.2s.
22.2.2 Test time
(1) Adjustable range
0.5~999s, with time off function.
[Mask time + 0.2s or more]
(2) Setting resolution
0.1s (0.5~99.9s) / 1s (100~999s)
(3) Time display
During the test
With timer ON
Remaining time is displayed.
With timer OFF Time lapse is displayed.
(4) Mask time
0.3~50.0 s
[Test time – 02s or less]
When the mask timer is in operation,
M
lamp is lit up.
The timer to prohibit the comparator action for a certain period, used
when the waiting time is necessary for such test sample as capacitor
load having the delay.
(5) Accuracy
±
20ms (0.5~99.9s) /
±
200ms (100~999s)
22.2.3 Discharging function
In insulation resistance test, the electricity charged in the test sample
is discharged. (ON/OFF of the function is possible.)
When the function is ON,
DISCHARGE
lamp is lit up.
At discharging,
I-TEST
lamp is lit up.
22.3
Test voltage output terminal
Provided on the front and rear panel. During the test, high voltage is output at the front and rear
terminals are.