Specifications
1. Display: MAX 999 counts LCD display (1000 counts only at 1T is displayed)
2. Over range indication: OL mark appears on insulation resistance range. LO mark appears on voltage range
3. Auto-ranging: Range shifts to upper range: 1000 counts. Range shifts to lower range: 95 counts (merely on the insulation resistance range)
4. Sample rate: 0.5-10 times / sec
5. Operable altitude: Less than or equal 2000m (Indoor use)
6. Operation circumstance: Temperature 0-40 Celsius Degree, humidity: Less than or equal 85%
7. Storage circumstance: Temperature -20-60 Celsius Degree, humidity: Less than or equal 90%
8. Overload protection: Insulation resistance: AC 1200V / 10s, Voltage: AC 720V / 10s
9. Voltage resistance: AC8320 (50/60Hz)/5 seconds (between electrical circuit and enclosure)
10. Insulation resistance: 1000M ohms of more / DC 1000V (between electrical circuit and enclosure)
11. Power Supply: DC 12V (8 x 1.5V LR14 batteries) (included)
12. Size: 153mm x 96mm x 220mm
13. Weight: 1032g (without batteries and test wires)

Features
1. Auto discharge function to make the operation safe
2. LCD backlight function
3. Digital display of measurement results
4. Live circuit warning symbols with audio sounds
5. Automatic shutdown function, the instrument will automatically shut down after 10 minutes without any operation
6. Set the test time function to automatically perform the measurement within the specified time
7. Low battery indicator
8. PI test (Polarization Index measurement)
9. PI measurement can automatically measure the resistance ratio according to the setting at any two points of time
10. External DC power supply (DC12V, 1A power adapter) can be used for measurement