I. General

ADS-21A Digital Insulation Tester is portable hand-held tester with battery powered, which is used for testing the security of power supply instrument. It is with simple and clear operation. It adopts standard test wire, and could carry out test quickly and store test result.

The design and production of this instrument is based on abundant knowledge and experiences of electric equipment testing instrument of several years.

II. Functions:

l         Insulation resistance measurement;

l         Continuity measurement by 200mA test current according to EN61557 standards;

l         Continuity measurement by 7mA test current (continuous measurement);

l         AC/DC voltage and frequency measurement.

III. Features:

l         Broad-range insulation resistance to test voltage (50～1000V DC);

l         Tested object could be automatically perform discharge after completing measurement;

l         Polarity shift of automatic voltage testing in “continuity ±200mA”function;

l         Used for continuity 7mA function of inductive tested object;

l         Data Memory;

l         LCD could display the result easy for reading. The operation is simple and clear.

IV. Technical parameters

Insulation resistance

Testing voltage: 50/100/250/500/1000V

Resistance range: 0—20GΩ

Resolution: 0.001;0.01;0.1;1;10MΩ

Accuracy: ± (5%+0.003M)   (0—199.9MΩ)

Testing current: >1mA

AC/DC voltage:

Range: 0—600V

Accuracy :±( reading 3%+3v)

Frequency range: 45—65Hz and DC

Test of 200mA testing current continuity

Display range: 0.00---2000Ω

Resolution: 0.01; 0.1; 1Ω

Accuracy: ± (reading 2%+2D)

Automatic polarity shift: yes

Continuity test

Display range: 0.00---2000Ω

Resolution: 0.01; 0.1; 1Ω

Accuracy :±( reading 5%+2D)

Short testing current: <7mA

Other parameters:

Power supply: 4×1.5V AA dry battery or 4×1.2V AA rechargeable battery ,automatic turn-off

Display: LCD display with backlight

Memory function: could store 1000 testing results

Dimensions: 252×142×62mm

Weight: 1.7kg

Protection grade: double insulation protection

Defend grade: IP54

Working temperature: -10—+50℃  85%RH

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