Mastech MS8040 User Manual

BENCH MODEL MULTIMETER
Contents
Contents......................................................................................................................................................................................... I
Chapter 1..................................................................................................................................................................................... 1
Safety Standards............................................................................................................................................................................. 1
Warning......................................................................................................................................................................................... 1
Warranty......................................................................................................................................................................................... 2
Chapter 2..................................................................................................................................................................................... 3
Introduction and Specifications..................................................................................................................................................... 3
Front Panel..................................................................................................................................................................................... 3
Rear Panel..................................................................................................................................................................................... 7
LCD Display Description............................................................................................................................................................. 9
Function Descriptions.....................................................................................................................................................................10
Chapter 3 Operation Manual..................................................................................................................................................... 11
Understanding AC Zero Input Behavior of True RMS Meters.................................................................................................... 11
DC/AC(TRMS) Voltage................................................................................................................................................................. 11
DCmV/ACmV............................................................................................................................................................................. 13
Ohm/Continuity/DIODE.................................................................................................................................................................14
Capacitance Measurement............................................................................................................................................................. 15
Logic Frequency/Duty cycle Measurement................................................................................................................................. 16
Clamp Measurement..................................................................................................................................................................... 17
I

Mastech MS8040 Specifications

General

Type	Digital Multimeter
Display	LCD
DC Voltage Range	400mV/4V/40V/400V/1000V
AC Voltage Range	400mV/4V/40V/400V/750V
Resistance Range	400Ω/4kΩ/40kΩ/400kΩ/4MΩ/40MΩ
Frequency Range	10Hz - 10MHz
Diode Test	Yes
Continuity Test	Yes
Battery	9V
Continuity Buzzer	Yes
Data Hold	Yes
Auto Power Off	Yes
Temperature Range	-20°C to 1000°C
DC Current Range	400µA/4000µA/40mA/400mA/4A/10A
AC Current Range	400µA/4000µA/40mA/400mA/4A/10A

Summary

Chapter 1

Safety Standards

Standards for electronic test instruments and safety requirements.

Warning

Precautions to avoid electric shock, personal injury, or death.

Chapter 3 Operation Manual

DC/AC(TRMS) Voltage

Procedure for measuring DC and AC voltages up to 1000V.

DCmV/ACmV

Procedure for measuring low DC and AC voltages (mV range).

Ohm/Continuity/DIODE

Procedures for measuring resistance, continuity, and diode forward voltage.

Capacitance Measurement

Procedure for measuring capacitance values up to 220mF.

Logic Frequency/Duty cycle Measurement

Procedure for measuring frequency and duty cycle.

Clamp Measurement

Procedure for measuring current using a clamp adapter.

Temperature measurement

Procedure for measuring temperature using a thermocouple.

DCµA / AcµA measurement

Procedure for measuring microampere DC and AC currents.

DC mA/AC mA measurement

Procedure for measuring milliampere DC and AC currents.

DC A/AC A measurement

Linear Frequency Measurement

Chapter 4 Specification

General Specification

Range and Accuracy

AC Voltage Accuracy

DC Voltage Accuracy

AC Current Accuracy

DC Current Accuracy

Resistance Accuracy

Capacitance Accuracy

Logic Frequency

Linear Frequency

Duty

Clamp

Temperature

Chapter 5 Maintenance

Replacing the Fuse

Procedure to examine and replace internal fuses.

Replacing the Power Fuse

Procedure to replace the main power fuse.

Chapter 6 Accessories

Replacing the Battery

Procedure to replace the multimeter's batteries.