Manual

− 3 −
KEW 3121A KEW 3122A KEW 3123A
DC Test Voltage 2500V 5000 V 5000V 10000V
Measuring Ranges
0∼2000MΩ/
1000∼100000MΩ
（automatic change）
0∼5000 MΩ/
2000∼ 200000MΩ
(automatic change)
0∼5GΩ/2∼200GΩ
(automatic change)
0∼10GΩ/4∼400GΩ
(automatic change)
Accuracy
Insulation
Resistance
±5% of reading
（100∼50000MΩ）
±10% of reading
or 0.5% of scale length
（ ranges other than
listed above）
at
23℃ ±5℃
±5% of reading
（200∼ 100000MΩ）
±10% of reading
or 0.5% of scale length
（ ranges other than
listed above）
at 23℃ ±5℃
±5% of reading
（0.2∼100GΩ）
±10% of reading
or 0.5% of scale length
（ ranges other than
listed above）
at 23℃ ±5℃
±5% of reading
（0.4∼200GΩ）
±10% of reading
or 0.5% of scale length
（ ranges other than
listed above）
at 23℃ ±5℃
±10% of reading
（100∼50000
MΩ）
±20% of reading
or 1.0% of scale length
（ ranges other than
listed above）
at −10℃∼＋40℃
±10% of reading
（200∼ 100000MΩ）
±20% of reading
or 1.0% of scale length
（ ranges other than
listed above）
at −10℃ ∼＋40℃
±10% of reading
（0.2∼100GΩ）
±20% of reading
or 1.0% of scale length
（ ranges other than
listed above）
at −10℃∼＋40℃
±10% of reading
（0.4∼200GΩ）
±20% of reading
or 1.0% of
scale length
（ ranges other than
listed above）
at −10℃∼＋40℃
Output
Voltage
2500V ±5%
（100∼50000MΩ）
5000V ±5%
（200∼ 100000MΩ）
5000V ±5%
（0.2~100GΩ）
10000V ±5%
（0.4~200GΩ）
Operating
Temperature & Humidity
−10℃ ∼＋40℃ at 85% max. relative humidity
Storage
Temperature & Humidity
−20℃ ∼＋60℃ at 90% max. relative humidity
Insulation Resistance 1000MΩ max./ 1000V between electrical circuit
& housing case
Withstand Voltage 5000V AC for one minute between electrical circuit & housing case
Dimensions 200（L）×140（W）×80（D）mm
Weight Approx. 1kg（including batteries）
Power Source 8 pcs of R6P (AA) battery or equivalent
Accessories
Hard Carrying Case:M-9158 Test Leads
(Line Probe:M-7165A,
Earth
Cord:M-7224A, Guard Cord:M-7225A)
Hard Carrying Case:M-9158 Batteries, Test Leads (Line
Probe:M-7165A, Earth Cord:M-7224A, Guard Cord:M-
7225A) Pickel type prod:M-8019
（Optional adaptor model 8324 is available for connection to recorder）