Assignment 1: Unit 53 Electronic Measurement
and Testing
, Contents
Task 1 Page 3-4
Task 2 Pages 5-7
,Task 1
This task will assess your knowledge of the basic characteristics of test and measurement
instruments commonly found in any electronic laboratory. Answer clearly each point.
Consider the following measurement instrument
Answer the following points using the specs sheet provided:
Name the instrument shown
It’s a digital Multimeter and MY-64 is the model
Describe the type of measurements that can be made with this instrument
The Digital Multimeter can measure: AC and DC voltage, frequency 0.1Ω.-200MΩ.,
Temperature 0℃ to 40℃, AC and DC current, capacitance, resistance and diode, transistor and
continuity test.
The power source used by the instrument
DC power supply from a 9V battery
The type of connectors used
Crocodile clips and leads
The degree of precision when measuring:
AC and DC voltages: ±(% reading + No. of digits)
, DC voltage accuracy from 200mV-200v is ±(0.5% of rdg + 3d)and from
201-1000v is (0.8% of rdg + 3d)
AC voltage accuracy from 2V-200V is ±(0.8% of rdg + 3d) and from 201-
750V is ±(1.2% of rdg + 5d)
Resistance measurements
200Ω ±(0.8% of rdg ± 3d), 2kΩ-2MΩ ±(0.8% of rdg ± 2d), 20MΩ ±(1% of rdg ± 5d)
200MΩ ±[5% of (rdg -1MΩ) +10d]
Current measurements
DC current 20mA ±(0.8% of rdg + 2d), 200mA ±(1.2% of rdg + 2d and 20A ±(2% of rdg
+ 5d)
AC current 20mA ±(1% of rdg + 3d), 00mA ±(1.8% of rdg + 3d) and 20A ±(3% of rdg +
7d)
The input resistance/impedance of the instrument
10M ohms on all ranges
The type of display used
It’s a 40mm LCD display. Liquid crystal display (LCD) is a type of a flat panel which uses liquid
crystals in its primary form of operations.
The minimum and maximum frequency range for AC voltage measurements
The frequency range is from 40Hz to 400Hz
The resolution of the instrument when set at the top of each range
AC voltage the resolution is 1V
DC voltage is the same as the AC voltage
DC and AC current has the same resolution of 10mA
The temperature resolution is 1 degree Celsius
The resolution for the capacitance is 10nF at top range
The resolution for the resistance is 10kOhms at top range
The maximum non-continuous peak current allowed
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