A digital multimeter can be used to measure DC and AC voltage, DC and AC current, resistance, capacitance, frequency, battery, diode, and so on. The entire circuit design is centered around a large-scale integrated circuit dual integral A/D converter, and is equipped with a full process overload protection circuit, making it a high-performance tool instrument and one of the essential tools for electricians
First, precautions before operation
(1) Place the ON-OFF switch in the ON position and check the 9V battery. If the battery voltage is insufficient or "BAT" will be displayed on the display, the battery should be replaced; If it does not appear, proceed as follows: Before testing, the function switch should be placed on the required range, and attention should be paid to the position of the pointer, as shown in the following figure
(3) It should also be noted that during the measurement process, if it is necessary to shift gears or change the position of the contact pin, the two probes must be removed from the measuring object before shifting gears and changing the position of the contact pin
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsBaijian and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered, meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing, with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China