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Follow the steps below to replace the battery

1) Turn off the instrument power supply.

2) Remove all test leads from the input socket.

3) Unscrew the captive screws of the battery cover and remove it.

4) Remove the battery cover.

5) Replace the new 6F22 9V battery

6) Install the battery cover as it is, tighten the screws.

Product warranty instructions

Product certification is your instrument in the use of failure, seeking repair services must have, and then you purchase the invoice at the same time to be effective.

1) When your multimeter in use fails, please contact our maintenance department as soon as possible, consultation, so as not to delay your use and warranty period.

2) The product of the Company from the date of purchase from the warranty service. In the event of failure during the warranty period, the company professionals to confirm the reasons for the failure of non-users, the company free warranty service.

3) If the warranty period is exceeded, the cost will be charged (repair fee + component fee).

4) Even during the warranty period, maintenance fees are charged in the following cases.

Technical indicators

Ambient temperature: 23 ± 5 ℃ Relative humidity: <75%
3.2.1 True rms zero input
3.2.1.1 The measurement of sine wave signal, the use of true RMS measurement method than the traditional average response method error is small.
3.2.1.2 True RMS The instrument can accurately measure the sine wave signal, but if it is on the AC function, the instrument may display 1 to 50 if the measured signal is not input (shorted at the AC voltage range and the input terminal) Word between a reading. These deviations are normal. Within the specified measuring range, they do not affect the accuracy of the multimeter to measure alternating current.
3.2.1.3 True RMS requires that the input signal reach a certain level for measurement. Therefore, the AC voltage and current range is specified between 2% and 100% of full scale.


3.2.2 DC voltage

- Input impedance: 10MΩ
- Maximum input voltage: 600V DC or 600V AC (rms)
Note:
In the small voltage range, the pen is not connected to the circuit under test, the instrument may have beating the reading,
This is normal, this is because the instrument caused by high sensitivity, does not affect the actual measurement results.


3.2.3 AC voltage

- Input impedance: 10MΩ

- Maximum input voltage: 600V AC (RMS) or 600V DC

- Frequency range: 40 ~ 1000Hz True RMS

Note:
In the small voltage range, the pen is not connected to the circuit under test, the instrument may have beating the reading,
This is normal, this is because the instrument caused by high sensitivity, does not affect the actual measurement results.



3.2.4 Alternating current

- Overload protection: mA range fuse (self-recovery fuse 200mA / 250V)
10A range without insurance
- Maximum input current: mA: 600mA DC or AC rms;
10A: 10A DC or AC rms;
When the measured current is greater than 5A, the continuous measurement time is not longer than 15 seconds, after the measurement to stop the current measurement for more than 1 minute.
- Frequency response: 40Hz ~ 1000Hz True RMS.

3.2.5 DC

- Overload protection: mA range fuse (self-recovery fuse 200mA / 250V)
10A range without insurance
- Maximum input current: mA: 600mA DC or AC rms;
10A: 10A DC or AC rms;
When the measured current is greater than 5A, the continuous measurement time is not longer than 15 seconds, after the measurement to stop the current measurement for more than 1 minute.


3.2.6 Frequency

- Overload protection: 250V DC or AC (rms)
- Input voltage range: 600mV ~ 10V AC (with the measured frequency increases, the input voltage should also increase)


3.2.7 Duty cycle

- Frequency response: 10 ~ 10MHz

- Input voltage range: 600mV ~ 10VAC (with the measured frequency increases, the input voltage should also increase)

- Maximum input voltage: 250V AC (rms)

Resistance

- Open circuit voltage: approx. 1.0V
- Overload protection: 250V DC or AC (rms)

Temperature test

- Overload protection: 250V DC or AC (rms)

Shenzhen Xishen Development Co.,LTD,business mogel for testing instruments for more than 10 years.Our engineers have been in this industry for over 20 years and served some of the most famous customers from all over the world.We can provide below services for all our partners in this challenging world.1.Fast delivery,1~5 days delivery time for CHXDEV  Products.2.Small MOQ requirements for all our items, 1PCS is also acceptable.3.Exclusive Partnership in different regions4.OEM&ODM Design services for bright ideals.5.Free samples avaiable for partners.All our items are coming with CE certification and we have special team work for after sales services 7*24 to help you solve any kind of problem.We are ready for sign contract with you in case you need it, as honest dealer, we never crook our customers.Come and let us make a difference together !