Brief Introduction
The insulation resistance tester, also known as the megohmmeter, is used for testing insulation resistance. This instrument is a high-performance digital one, featuring a large LCD screen with backlight display, data holding, automatic discharge, and automatic shutdown functions. The instrument is equipped with test timing and voltage monitoring functions. When the circuit voltage exceeds 36V, the instrument will prohibit testing to protect the safety of the object being tested and personnel.
 
The resistance value, test time and output voltage are displayed on the same screen. It also has the functions of measuring AC voltage and DC voltage. The maximum output voltage of this series of instruments is 5000V, the maximum test resistance value is 1000GΩ, and the maximum short-circuit current is 2mA.
 
The insulation resistance tester is aesthetically pleasing as a whole, has a wide measurement range, high precision and high resolution. It is easy to operate, portable, accurate and reliable, stable in performance and strong in anti-interference ability. It features shockproof, dust-proof and moisture-proof structures and is a commonly used instrument in telecommunications, power, meteorology, computer rooms, oil fields, mechanical and electrical installation and maintenance, as well as industrial enterprises that use electricity as industrial power or energy. It is applicable to measuring the resistance values of various insulating materials and the insulation resistance of transformers, motors and electrical equipment, etc.

Maximum rated voltage: 5000V
Insulation resistance range: 0.1MΩ to 10000MΩ
Voltage range: 0V to 750V

Insulation resistance measurement function
50V：
0.10MΩ～1MΩ；±3%rdg ±5dgt ；0.01M
1MΩ～1GΩ；±5%rdg ±5dgt；0.1M
1GΩ～4GΩ；±10%rdg ±5dgt；0.1G
 
250V：
0.50MΩ～1MΩ；±3%rdg ±5dgt；0.01M
1MΩ～1GΩ；±5%rdg ±5dgt；0.1M
1GΩ～20GΩ；±10%rdg ±5dgt；0.1G
 
500V：
1MΩ～1GΩ；±5%rdg ±5dgt；0.1M
1GΩ～40GΩ；±10%rdg ±5dgt；0.1G
 
1000V：
2MΩ～1GΩ；±5%rdg ±5dgt；0.1M
1GΩ～80GΩ；±10%rdg ±5dgt；0.1G
 
2500V：
10MΩ～1GΩ；±5%rdg ±5dgt；0.1M
1GΩ～100GΩ；±10%rdg ±10dgt；0.1G
100GΩ～200GΩ；±10%rdg±10dgt；1G
 
5000V：
50MΩ～1GΩ；±5%rdg±5dgt；0.1M
1GΩ～100GΩ；±5%rdg±5dgt；0.1G
100GΩ～1000GΩ；±10%rdg±10dgt；1G
 
Ac voltage measurement function:
AC/DC：0.0V～750V；±5%rdg±5dgt；0.1V
 

Technical Specification
Functions: Insulation resistance test, AC voltage test, DC voltage test
Power supply: DC 9V, No. 2 alkaline dry battery (LR14 1.5V×6)
Rated voltage: 50V 250V; 500V; 1000V; 2500V; 5000V
Output voltage accuracy: (5% to 10%) ±10V
Insulation resistance range :0.1MΩ to 1000GΩ
Voltage range :AC/DC: 0V to 750V
Short-circuit current :2mA MAX
Maximum capacity load :1μF
Gear shifting: Turning the gear shifting knob allows you to select the corresponding gear
Backlight: Controllable gray and white backlight, suitable for use in dim places
Display mode: 4-digit large LCD display with obvious contrast
Measurement indication: During measurement, the LED flashes and the buzzer sounds
LCD size: 128mm×75mm Display field: 121mm×67mm
Instrument dimensions: 212mm×175mm×85mm
Measurement time: The single test lasts for 10 minutes. During the test, users can manually stop it or it will automatically stop after 10 minutes, and the measurement data will be displayed on the screen.
Battery: The battery low voltage symbol is displayed. When the battery voltage is low, it will give an early reminder and prompt the battery to be replaced
Automatic discharge function: The △ symbol flashes during discharge. After the power is discharged, the △ symbol goes out.
Automatic shutdown function: It will automatically shut down 15 minutes after startup
Power consumption: Standby: Approximately 40mA(backlight off); Measurement: Approximately 100mA(backlight off)
Mass: Instrument: Approximately 1360g (including battery); Total mass: Approximately 2.4kg (including packaging)
Operating temperature and humidity: -10℃ to 40℃ Below 80%RH
Storage temperature and humidity: -20℃ to 60℃ Below 70%RH
Suitable for installation: IEC61010-1 (CAT Ⅲ 300V, CAT Ⅳ 150V, Contamination level 2)