Mastech MS8264 User Manual

HANDHELD
DIGITAL MULTIMETER
OPERATOR ’ S
INSTRUCTION MANUAL
GENERAL INSTRUCTIONS
This instrument complies with IEC 1010-1 (61010-1@IEC: 2001), CAT. II 1000V and CAT. III 600V
overvoltage standards. See Specifications.
To get the best service from this instrument, read carefully this user's manual and respect the detailed
safety precautions.
International symbols used on the Meter and in this manual are explained in chapter 1.1.3
Precautions safety measures
1.1.1 Preliminary
* Measurement category III is for measurements performed in the building installation.
NOTE: Examples are measurements on distribution boards, circuit-breakers, wiring, including cables,
bus-bars, junction boxes, switches, socket-outlets in the fixed installation, and equipment for industrial
use and some other equipment, for example, stationary motors with permanent connection to the fixed
installation.
* Measurement category II is for measurements performed on circuits directly connected to the low
voltage installation.
NOTE: Examples are measurements on household appliances, portable tools and similar equipment.
* Measurement category I is for measurements performed on circuits not directly connected to MAINS.
NOTE: Examples are measurements on circuits not derived from MAINS, and specially protected
(internal) MAINS derived circuits. In the latter case, transient stresses
are variable; for that reason, requires that the transient withstand capability of the equipment is made
known to the user.
* When using this Multimeter, the user must observe all normal safety rules concerning:
― protection against the dangers of electric current.
― protection of the Multimeter against misuse.
* For your own safety, only use the test probes supplied with the instrument. Before use, check that they
are in good condition.
1.1.2 During use
* If the meter is used near noise generating equipment, be aware that display may become unstable or
indicate large errors.
* Do not use the meter or test leads if they look damaged.
* Use the meter only as specified in this manual; otherwise, the protection provided by the meter may be
impaired.

Mastech MS8264 Specifications

General

Type	Digital Multimeter
Max DC Voltage	1000V
Max AC Voltage	750V
Max Current	10A
DC Voltage Range	400mV/4V/40V/400V/1000V
AC Voltage Range	4V/40V/400V/750V
Resistance Range	400Ω/4kΩ/40kΩ/400kΩ/4MΩ/40MΩ
Frequency Range	10Hz - 10MHz
Diode Test	Yes
Continuity Buzzer	Yes
Power Supply	9V Battery
Transistor Test	Yes
Data Hold	Yes
Back Light	Yes
DC Current Accuracy	±(1.0% + 3)
Display	LCD
Capacitance Range	40nF/400nF/4µF/40µF/100µF
Temperature Range	-20°C - 1000°C
DC Voltage Accuracy	±(0.5%+3)
AC Current Accuracy	±(1.5% + 10 digits)

Summary

General Instructions and Safety

Preliminary Safety Precautions

Details measurement categories (III, II, I) and general safety rules for multimeter use.

Safety Measures During Use

Covers precautions for noise, damaged equipment, and proper usage during measurements.

Symbols and Instructions

Explains symbols and provides guidelines for handling, servicing, and operating the instrument safely.

Instrument Description and Features

Instrument Familiarization

Overview of the multimeter's physical components like LCD, keypad, rotary switch, and terminals.

LCD Display and Symbols

Explains the meaning of various symbols and indicators shown on the LCD screen.

Keypad and Terminal Functions

Details keypad operations and the purpose of each terminal for connecting test leads.

Measurement Functions

General Functions

Explains general features like Data Hold mode and Battery Saver function.

Voltage and Resistance Measurement

Step-by-step guide for measuring voltages (AC/DC) and resistance safely.

Diode, Continuity, and Capacitance

Procedures for testing diodes, checking continuity, and measuring capacitance.

Transistor, Frequency, and Temperature

Covers measurement of transistor hFE, frequency, and temperature.

Current Measurement

Detailed steps for measuring DC and AC current safely and accurately.

Technical Specifications

General Specifications

Details environmental conditions, operating/storage temperatures, and general instrument parameters.

Measurement Specifications

Provides accuracy details for various measurement functions like DC/AC voltage, resistance, etc.

DC and AC Current Specifications

Outlines specifications and overload protection for DC and AC current measurements.

Maintenance and Battery Replacement

General Maintenance

Guidelines for cleaning and maintaining the multimeter case and terminals.

Battery Replacement

Procedure for safely replacing the multimeter's battery to avoid false readings.