Testing with System Multimeters

PublishTime：2022-07-15

■ Regardless of whether a Boeing, a Lear jet or a Ju 52 is involved, power failure in the air usually has catastrophic consequences for the aircraft’s instrumentation and maneuverability. It is thus imperative that, in addition to the generators,emergency power functions reliably under any conceivable conditions via the batteries, and can deliver enough “juice”. For this reason, rechargeable aircraft batteries are subjected to careful testing on a regular basis.
● Time-Consuming Battery Test
▲ There are no special measuring instruments or systems for testing the condition of the rechargeable batteries. Testing is generally conducted manually with the usual panel-mount measuring instruments, multimeters, laboratory recorders and other devices. The battery is loaded with a constant current for the discharge voltage test. Battery voltage is logged with a laboratory recorder during discharging. An unsteady charging voltage curve indicates that one or several cells are defective. The voltage of the individual cells must thus be measured in addition to overall battery voltage. The inspector records the respective results to the test report with the designations “OK” or “fail”. In the event of a “fail”, he removes the defective cell and replaces it with a new one. The discharge voltage and cell voltage tests must then be repeated. Finally, the temperature sensors have to be checked. Recording of on and off temperatures for the thermal circuit breaker was especially time-consuming. In order to be able to accurately read the temperature value at the test instrument and record it to the report, the switching thresholds had to be continuously observed at a heat block during warm-up and cool-down. The results were then manually entered to the required report templates.

Brand of Product：	Gossen Metrawatt
Part#：
Product Category：	System Multimeters 、 handheld system multimeters More
Application：	More
Data Type：	Selection guide More
Safety & Environment Standards：	More
Operating Temperature：	Please see the document for details
Qualification Grade：	More
Qualification Approval：	More
Package：
Language：	English Chinese Chinese and English Japanese
Date of Creation：	2005/2/8
Version Number：
Data Encoding：
Data Size：	67 KB

Data section preview(1pages)

- The full preview is over,the data is 1 pages -

Download

+1 Like
Add to Favorites

Recommend

New Products & Solutions

More>

Technical Resources

More>

All reproduced articles on this site are for the purpose of conveying more information and clearly indicate the source. If media or individuals who do not want to be reproduced can contact us, which will be deleted.

Integrated Circuits