Mastech MS8238C User Manual

MS8238C

Digital Multimeter

User's Manual

MS8238C

FUNC

TEMP

V

600V

CAT III

MAX 30 sec.

every 15 min.

DIGITAL MULTIMETER

HOLD

mA

μA

COM

10A

MAX

FUSED

RAN NCV

12V

Autorange

Auto power off

TEMP

mAμAV

MAX
200mA
FUSED

MAX
600V

9V

1.5V

CAT III

600V

CONTENTS

1.Overview .........................................................1

2. .......................................1Safety Information

2.1 Safety Standards.......................................1

2.2 Precautions..............................................1

2.3 Electrical Symbols .....................................3

3. ..............................4Description and Usage

3.1 Front Panel..............................................4

3.2 Display ..................................................5

3.3 Using the Meter........................................6

3.4 Auto Power Off Function.............................6

4. Operating Instructions..................................7

4.1 AC/DC voltage measurement ......................7

4.2 AC/DC current measurementrent..................7

4.3 Resistance measurement .............................8

4.4 Continuity measurement ...............................9

4.5 Diode test .................................................9

4.6 Battery test...............................................10

4.7 Temperature measurement...........................10

5. Specifications ................................................11

5.1 General Specifications ................................11

5.2 Technical Specifications ..............................12

6. Maintenance....................................................15

6.1 General Maintenance .................................15

6.2 Replacing the Battery and Fuses ...................16

6.3 Replacing the Probe ..................................16

1.Overview

WARNING

To avoid electrical shock or personal injury,
please read all safety information,warnings and
precautions before using the meter.

The MS8238C is a small, safe and reliable 3 ½ digit
handheld auto ranging multimeter.This meter can
measure AC/DC voltage, AC/DC current, resistance,
diode, continuity, battery test, temperature and
non-contact voltage tests.This tool is ideal for
professionals and hobbyists alike.

2. Safety Information

2.1 Safety Standards

The MS8238C meets standards for CAT III 600V
installations and a pollution degree of 2.

• The protection provided by the meter can only be
ensured if all safety procedures are strictly followed.

• The safety symbols on the meter are to advise of
potential dangerous situations.Caution is required when
measuring close to the meter’s safety limits.

• Never exceed the protection limit values indicated in
the specifications for each range of measurement.

The special attention should be paid when using the meter
because the improper usage may cause electric shock and
damage the meter .The safety measures in common safety
regulations and operating instruction should be complied
with when using. In order to make fully use of its functions
and ensure safe operations please comply with the usage
in this section carefully.

WARNING

2.2 Precautions

• To avoid electrical shock or personal injury, observe and
follow all safety precautions

• Check the meter for damage before use.Do not use if
any damage is observed.

• Check the test leads for cracks or exposed wires before
using the meter.Replace if necessary.

• Ensure the meter works properly by testing a known
voltage source first. If not working properly, the
protective equipment may be damaged; have the meter
serviced before using.

• Never measure voltages that may exceed the protection
limit indicated on the meter.

• Always be careful when working with voltages above
60V DC or 30V AC rms. Keep fingers behind the probe
barriers when making voltage measurements.

• Make sure the test leads are in the correct input jacks
before measurement.

• Do not expose the meter to explosive gas, dust or vapor.

• When connecting the test leads to a measurement
circuit, connect the common lead first, then the live lead.
Reverse when disconnecting.

• Turn off power to circuit and discharge all capacitors
before making resistance, continuity or diode
measurements.

• In order to avoid incorrect DC voltage readings, check
the circuit for AC voltage first, then put the meter in the
appropriate DC voltage range.

• Turn off circuit power and check fuses before connect
the leads when measuring current.Turn circuit power
on after making connection.

• Never use the meter unless the back cover is in place
and fastened securely.

01

02

• When the low battery indicator“ ”is displayed, replace
the battery.The accuracy of the meter cannot be
guaranteed while the low battery indicator is on.

• Before opening the case, always disconnect test leads
from all energized circuits.

• For continued protection against fire, replace fuse only
with the specified voltage and current ratings listed in
the manual.

• Measure known voltage with the meter to verify that

the meter is working properly. If the meter is working
abnormally, stop using it immediately. A protective
device may be damaged. If there is any doubt, please
have the meter inspected by a qualified technician.

2.3 Electrical Symbols

Important safety information.

High voltage with danger.

Ground.

Double Insulation (Class II safety equipment).

Fuse must be replaced as per the specification herein.

Accord with the related EU laws and regulations

AC (Alternating Current)

DC (Alternating Current)

AC & DC (Both direct and Alternating Current)

Conforms to UL STD. 61010-1, 61010-2-030 and
61010-2-033; Certified to CSA STD. C22.2
NO. 61010-1, 61010-2-030 and IEC STD.61010-2-033

CAT III : MEASUREMENT CATEGORY III
is applicable to test and measuring circuits connected to
the distribution part of the building’s low-voltage MAINS
installation.

3 Description and Usage

3.1 Front Panel

1

MS8238C

4

5

6

7

9

1.LCD display

2.Non-contact voltage
(NCV) button

3.Range button

4.Function button

5.Data hold button

FUNC

TEMP

V

600V

CAT III

MAX

MAX 30 sec.

every 15 min.

DIGITAL MULTIMETER

HOLD

RAN NCV

mA

μA

12V

9V

1.5V

Autorange

Auto power off

TEMP

mAμAV

COM

MAX

200mA

10A

FUSED

FUSED

MAX
600V

6.Rotary switch

7.A input jack

8.Common jack

9.Input jack
(all functions except current
greater than 200mA)

2

3

8

03

04