Introduction:

DC Resistance Tester/ Microhmmeter also known as transformer DC resistance tester, DC low value resistance tester, grounding continuity tester. the tester adopts microprocessor technology, precise 4-wire method to testing, accurate and reliable.

which mainly used to measure transformer winding resistance, grounding continuity resistance, cable conductor resistance; contact resistance of switches, connectors and relays; metal riveting resistance; winding resistance of coil, motor, transformer; connection resistance between metal components; welding point resistance ; battery parallel connection resistance; and wire length measurement & calculation, etc.

The tester shell adopts a waterproof protective case, which is anti-collision, anti-drop, waterproof (protection grade IP65), sturdy, safe and durable.

The tester also equipped with a large-capacity rechargeable lithium battery pack, which is especially suitable for use in outdoor construction sites.

Widely used in building quality inspection stations, supervision companies, construction units, lightning protection companies, power departments, marine locomotive factories, etc.

The tester has two measurement modes: automatic and manual. In the automatic measurement mode, the tester will automatically selects the range gear and test current. In the manual measurement mode, there are 7 range gear selections to meet the requirements of users in different sites.

The tester has the function of converting resistance at temperature 75℃, which can be compensated and converted according to the temperature and material of the tested sample.

The tester also has automatic discharge function, alarm function, automatic shutdown function, etc.

DC Resistance Tester/Microhmmeter consists of host, monitoring software, test wires, charger, USB communication cable, etc. The tester equip with a large LCD screen, which can display the test resistance value and current value in the same screen.

The tester has bluetooth communication function, which can perform test operations or view test results on the mobile phone after installing the APP, and particularly convenient for using on-site.

The tester can store 600 groups of data, connected to the computer and upload the store data through the USB interface and monitoring software. The monitoring software has the functions of reading, viewing, saving, reporting, and printing historical data etc.

Function Features:

Max output voltage is 24V, max test current is 10A, with fast testing speed.

Two measurement modes, automatic measurement mode: the test current can be automatically selected according to the load. Manual measurement mode: test current gears of 10A, 5A, 1A, 100mA, 10mA, 2mA and 1mA can be choose.

With bluetooth communication function, which can perform test operations or view the test result on the mobile phone after installing the APP.

The tester has USB interface and monitoring software, which can communicate with the computer.

With the discharge function, it can discharge automatically after the test, and the discharge indication is clear to avoid misoperation.

With alarm function, which can set the resistance alarm value.

Automatic shutdown function, automatic shutdown after 15 minutes without any operation.

Technical Specifications:

Display Range:1.0uΩ~50.00kΩ

Range & Test Current

1. 200.0uΩ~50.00kΩ,Auto
2. 200.0uΩ~20.00mΩ,10A,0.2%FS
3. 10.00mΩ~200.0mΩ,5A, 0.5%FS
4. 100.0mΩ~2.000Ω,1A,1%FS
5. 1.00Ω~20.00Ω,100mA,1%FS
6. 10.0Ω~200.0Ω,≤10mA CVT, 1%FS
7. 100Ω~50.00kΩ,≤1mA CVT, 1%FS

Function:Used to measure transformer winding resistance, grounding continuity resistance, cable conductor resistance; contact resistance of switches, connectors and relays; metal riveting resistance; winding resistance of coil, motor, transformer; connection resistance between metal components; welding point resistance ; battery parallel connection resistance; and wire length measurement etc.

Test Method:Precision 4-wire method, 2-channel A/D simultaneous detection

Max Resolution:0.1uΩ

Output Voltage:24V MAX

Test Current Gear:10A, 5A, 1A, 100mA, 10mA, 1mA, Auto

Measure Time:Sampling AD rate 1s/ time

Test Mode:Automatic or Manual

Power Supply:DC 22.2V 5200mAh, rechargeable battery, full charge 25.2V

Alarm Setting:Alarm threshold setting range: 1mΩ~2500Ω, 0Ω does not start up the alarm function, the tester will not start up the alarm function every starting up the tester.

Alarm Indication:When the test value exceeds the alarm setting value, the buzzer will alarm prompt.

Overflow Indication:Over range overflow function: over limit display digital:9999

Charge Indication:The indicator light on the charger lights up red when charging, and lights up green when fully charged.

Low Voltage Indication:When the battery voltage drop to DC22.2V±0.1V, will display low power symbol, and remind the tester charge in time

Data Storage:600 groups (power down or replace battery will not lose the data)

Data Hold:Automatically hold displaying the measured results after each testing.

Backlight:Yes

Discharge Function:Automatic discharge after testing, clear discharge indication to avoid misoperation.

Automatic Shutdown:Automatic shutdown after 15 minutes without any operation

Test Wires:Each 1pcs of red and black test line

LCD Size:128mmX75mm; Display area: 124X67mm

Host Size:280mmX260mmX160mm

Weight:Total weight:5.8kg (with accessories)

Working Temperature And Humidity:-10℃~40℃; Below 80%RH

Storage Temperature And Humidity:-10℃~60℃; Below 70%RH

Protection Level:IP65(close the case)

Bluetooth Communication:Yes

USB Interface:With the USB interface, install the monitoring software, storage data can upload to PC.

Withstand Voltage:AC 3700V/rms (between the case and the screw)

Suitable Safety Standard:IEC61010-1, CAT III 600V, pollution degree 2, JJG724-1991《DC digital ohmmeter verification procedure》,JJG166-1993《DC resistance verification procedure》,《DL/T967-2005 DL/T967-2005 loop resistance tester and DC resistance fast Tester verification procedure》