Troubleshoot Electronic Circuit (Lesson 3) - - - Golden Rule

Salam,

Lesson 3: Golden Rule (comparison)



What is the purpose doing Comparison?
To determine either the electronic device performance is like the others or not.

Why?
To find out "weird" data/reading/measurement/graph of electronic devices by compare with "good" electronic devices. By doing this, the suspected faulty electronic connection can be predicted.

How?
at PCBA: measure resistance and voltage through suspected faulty connection and make comparison.
at OVERALL DEVICE: compare performances between them.

Troubleshoot Electronic Circuit (Lesson 2) - - - Calibration

Salam,

Lesson 2: Calibration



What is the purpose doing Calibration?
To ensure you measurements accurate and persistence.

Why?
It because certain device are sensitive in different Current, Voltage, Power (dbm, watt) and Resistance. Over supply might harm device and insufficient supply might affected the performance.

How to do Calibration?
By making comparison with "good unit" measurements or in industries called as Golden Unit or sometimes named as DV. This Golden Unit or DV had given it value as reference, hence by measure it you can get your instruments (multimeter/hand held/LCR/etc) error value.

When should perform calibration?
For optic-electronic industries, calibration should be done every time make change on connection. Besides that enough to do annually or periodic.

How to use error value?
Deduct or add error value after make measurement, so that you can get accurate measurements.

My senior engineer told me: "Your second lesson is calibration, first VMI. Now you know important of calibration". He told me because my calibration effect others experiment. Hope you get what I meant and learn from my mistake?