Mastech MS8238H User Manual
MS8238H
User's Manual
Digital Multimeter
CONTENTS
2. Safety Information
2.1 Safety Standards
1. Overview
2.3 Precautions
2.4 Electrical Symbols
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3. Description
3.1 Front Panel
3.2 Display
3.3 Button Funtions
4. Operating Instructions
4.1 AC/DC voltage
4.2 AC/DC current
3.4 Auto Power Off
5. Specifications
5.1 General Specifications
5.2 Technical Specifications
4.3 Resistance
4.4 Continuity
4.5 Diode test
4.6 Battery test
4.7 Temperature
6. Maintenance
6.1 General Maintenance
6.2 Replacing the Battery
6.3 Replacing the Fuse
4.8 Non-Contact Voltage
4.9 Wireless Operation
CONTENTS
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6.4 Replacing the Probe
7. Accessories
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2.2 FCC Statement
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WARNING
1.Overview
The multimeter is a small, safe and reliable 3 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, along with Wireless communication
capabilities.This tool is ideal for professionals and hobbyists alike.
2. Safety Information
2.1 Safety Standards
The multimeter meets the following safety standards:
EN/UL/CSA61010-1,61010-2-030,61010-2-033for electronic testing
instruments. This meter meets 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.
• 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.
To avoid electrical shock or personal injury, please read all
safety information,warnings and precautions before using
the meter.
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2.2 FCC Statement
This device complies with part 15 of the FCC Rules. Operation is
subject to the following two conditions: (1) This device may not cause
harmful interference, and (2) this device must accept any interference
received, including interference that may cause undesired operation.
This equipment has been tested and found to comply with the limits for
a Class B digital device, pursuant to part 15 of the FCC Rules. These
limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates, uses
and can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to
radio communications. However, there is no guarantee that interference
will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is encouraged
to try to correct the interference by one or more of the following
measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to
which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
Caution:
Any changes or modifications not expressly approved by the party
responsible for compliance could void the user's authority to operate the
equipment.
• Check the meter for damage before use.Do not use if any damage is
observed.
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
2.3 Precautions
To avoid electrical shock or personal injury, observe and follow all safety
precautions
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2.4 Electrical Symbols
AC & DC (Both direct and Alternating Current)
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)
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 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.
• For continued protection against fire, replace fuse only with the
specified voltage and current ratings listed in the manual.
• If the equipment is used in a manner not specified by the manufacturer,
the protection provided by the equipment may be impaired.
• 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.
• 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.
• 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.
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