These insulation testers are intended primarily for periodic testing of industrial
motors, transformers, electrical wiring, and cable insulation for signs of deteri-
oration. Low readings may indicate impending failure and permit replacement
during routine maintenance rather than risking production downtime. Also
useful for safety testing of TV sets and appliances to assure
no hazardous leakage current. The voltage and resistance ratings for insulation
testing are often specified for the product to be tested.
308
307
300
305
Models 307, 308
■
Selectable 250V, 500V, or 1000V insulation test
■
Low resistance test
■
Extra rugged integral carrying case
Models 300, 305
■
Test insulation resistance
■
Measure AC voltage to 600V
■
Battery powered
■
1000V, 2000MΩ (Model 300)
■
Live circuit indicator warns of safety hazard
■
Push to test
500V, 1000MΩ (Model 305)
Specifications
300
Type
Output Voltage
Maximum current
Resistance Range
Analog
1000VDC
250µA
1MΩ -2000MΩ
305
Analog
500VDC
500µA
0.2MΩ - 1000 MΩ
307
Analog
1000VDC
2mA
1000V 0-200MΩ
500V 0-100MΩ
250V 0-50MΩ
1MΩ, 2MΩ, 4MΩ
Digital
1000VDC
1.2mA
0-2000MΩ
0-2000MΩ
0-2000MΩ
Does not apply
0-100Ω
100-200MΩ
200-1700MΩ
1700-2000MΩ
Live Circuit Indicator
308
models
Center Scale
Accuracy
50MΩ
20MΩ
Infinity: within 1% of scale length
Zero: within 1% of scale length
All points ±5% of reading
250V
±(1.5%+3D)
±(2%+5D)
±(3%+7D)
±(4%+8D)
500V
±(1.5%+2D)
±(1.5%+2D)
±(3%+4D)
±(4%+6D)
1000V
±(1.5%+2D)
±(1.5%+2D)
±(3%+3D)
±(4%+5D)
AC Voltage Test
Range
Frequency Response
Accuracy
Low resistance Test
Accuracy
General Specifications
Power Requirements
Battery Life
Operating Temperature
Storage Temperature
Dimensions
Weight
0 to 600 VDC
10Hz to 100kHz
±4% of full scale
Does not apply
Does not apply
0-50Ω
±5% of reading
0-200Ω
±(1.5% + 2 digits)
Eight “AA” cells (supplied)
10 hours continuous w/alkaline
Six “AA” cells (supplied)
4 hours typical alkaline
12 hours continuous
32˚ to 122˚F (0˚ to 50˚C),
≤
70% RH
-4˚ to 140˚F (-20˚ to 60˚C), <80% RH (with batteries removed)
6.66 x 4.18 x 1.42" (169 x 106 x 36mm)
15oz. (430g) w/batteries
7 x 8.5 x 3.5" (180 x 220 x 90mm)
2.6 lb (925g) with batteries
Accessories
Supplied:
Batteries, Carrying Case, Test Leads, Instruction Manual
One Year Warranty
Batteries, Integral Carrying Case w/strap, Test Lead, Instruction Manual
60
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