Mastech MS2026R Assembly instructions

CONTENTS PAGE

SAFETY INFORMATION……………………...

SYMBOL EXPLANATION …………………….

SAFETY PRECAUTIONS……………………..

MAINTENANCE………………………………..

GENERAL DESCRIPTION……………………

PANEL DESCRIPTION………………………..

FORWARD LAYOUT…………………………..

OPERATING INSTRUCTIONS……………….

SPECIFICATIONS……………………………..

AUTO POWER OFF…………………………..

REPLACING THE BATTERY…………………

ACCESSORIES………………………………..

SAFETY INFORMATION

The digital clamp meter has been designed

according to IEC1010 1 and IEC1010 2 032

concerning safety requirements for electrical

measuring instruments and hand-held current

clamps with double insulation overvoltage category

1000V CAT II 600V CAT III and pollution 2.

This meter complies with the requirements of the

following European Community Directives:

89 / 336 / EEC (Electromagnetic Compatibility) and

73 / 23 / EEC (Low Voltage) as amended by 93 /

68 / EEC (CE Marking).

However, electrical noise or intense electromag-

netic fields in the vicinity of the equipment may

disturb the measurement circuit.

Measuring instruments will also respond to

unwanted signals that may be present within the

measurement circuit.

Users should exercise care and take appropriate

precautions to avoid misleading.

1 

SYMBOL EXPLANATION

Important safety information, refer to the

operating manual.

Dangerous voltage may be present.

Earth ground.

Double insulation (Protection class 1000V

CAT II 600V CAT III).

SAFETY PRECAUTIONS

Follow all safety and operating instructions to

ensure maximum personal safety during the

operation and to ensure the meter is used safely

and is kept in good operating condition.

●

Read the operating instructions thoroughly

and completely before operating your meter.

Pay attention to WARNINGS, which will

inform you of potentially dangerous proce-

dures. The instructions in these warnings

must be followed.

Always inspect your meter and test leads for

2 

●

any sign of damage or abnormality before

every use. If any abnormal conditions exist

(i.e. broken test leads, cracked cases,

display not reading, etc.), do not attempt to

take any measurements.

Do not expose the instrument to direct

sunlight, extreme temperature or moisture.

Never ground yourself when taking electrical

measurements. Keep your body isolated

from ground by using dry clothing, rubber

shoes, rubber mat or any approved

insulating material.

You always are careful when working with

voltages above 60V dc or 30V ac rms. Keep

fingers behind the probe barriers while

measuring.

To avoid damages to the instrument, do not

exceed the maximum limits of the input

values shown in the technical specification

tables.

Never use the meter to measure voltages

that might exceed the maximum allowable

input value of any function.

3 

MAINTENANCE

●

Never touch exposed wiring, connections or

any live circuit when attempting to take

measurements.

Before opening the case, always disconnect

test leads from all energized circuits.

Never use the meter unless the back cover

is in place and fastened completely.

Do not use abrasives or solvents on the

meter. To clean it using a damp cloth and

mild detergent only.

Qualified and trained service technicians

should only perform calibration and repair of

the meter.

GENERAL DESCRIPTION

The meter is an autorange professional clamp

meter with 5999 counts. For measuring DC and AC

voltage, AC current, Resistance, Capacitance,

Frequency, ADP, Diode, and Continuity Test with

battery operated.

There is the AC measurement to be RMS or TRUE

RMS about the meter. It is chosen as user buy.

4 

Otherwise, there is a radius lamp near the clamp, It

is lighted in measuring current.

PANEL DESCRIPTION

Transformer jaws

Pick up the AC current flowing through the

conductor.

Rotary switch

Rotary switch is used to select functions.

HOLD button

When this button is pushed, the display will

keep the last reading and “ ” symbol will

appear on the LCD. Pushing it again returns

the meter to normal mode.

MAX/MIN button

Press the button to enter the MAX/MIN

Recording Hold mode. The maximum,

minimum values are then reset to the

present input. The readings are stored in

memory. “ MAX ”or “ MIN ”annunciator

turns on to indicate what value is being

displayed. Hold this button for more than 3

seconds to return to the normal operating

mode.

5 

LCD display

“ VHz” jack

This is positive input terminal for volt,

resistance, diode, capacitance frequency,

ADP and Continuity test. Connection is

made to it using the red test lead.

“COM” jack

This is negative (ground) input terminal for

all measurements except current.

Connection is made to it using the black

test lead.

RANGE button

Press this button to select auto and manual

range. When a function with auto and

manual mode is selected, the meter enters

6 

10.

11.

autorange at first. To change to manual

range, push this button once.

When the meter operates in manual ranging

mode, push this button to change range to

the higher one and hold this button for more

than 3 seconds to return to auto range mode

FUNC. button

In range, press this button to select

or or function. Different symbol of

function will appear on the LCD.

button

Press the button is used to turn the backlight

on. Press the button again is used to turn the

backlight off. To turn the backlight on again,

just press it once more.

When measuring current, press the button

the radius lamp near the clamp is lighted at

one time.

Rigger

Press the lever to open the transformer.

When the lever is released, the jaws will

close again.

7 

FORWARD LAYOUT

8 

OPERATING INSTRUCTIONS

DC VOLTAGE MEASUREMENT

Insert the black and red test leads into the

COM and VHz input terminals respectively.

Set rotary switch at desired V position.

Connect the test lead tips in parallel with the

circuit to be measured. Be careful not to

touch any electrical conductors.

The polarity of the red lead connection will

be indicated along with the voltage value.

Read the measure result from the display.

AC VOLTAGE MEASUREMENT

Insert the black and red test leads into the

COM and VHz input terminals respectively.

Set rotary switch at desired V~ position.

Connect the test lead tips in parallel with the

circuit to be measured. Be careful not to

touch any electrical conductors.

Read the measure result from the display.

9 

AC CURRENT MEASUREMENT

Set the rotary switch at desired A~ position.

Press the trigger to open transformer jaw

and to clamp one conductor only, making

sure that the jaw is firmly closed around the

conductor.

Read the measure result from the display.

RESISTANCE MEASUREMENT

Insert the black and red test leads into the

COM and VHz input terminals respectively.

Set rotary switch at desired 

position. Push FUNC. button to select .

Connect the test lead tips in parallel with the

resistance in the circuit being measured.

Read the measure result from the display.

NOTE:

If the resistance being measured exceeds

the maximum value of the range or the input

is not connected, an overrange indication

“OL” will be display.

10 

When checking in-circuit resistance, be sure

the circuit under test has all power removed

and that all capacitors have been discharged

fully.

CONTINUITY TESTING

Insert the black and red test leads into the

COM and VHz input terminals respectively.

Set rotary switch at desired position.

Push FUNC. button to select .

Connect the test lead tips in parallel with the

resistance in the circuit being measured. If

continuity exists (i.e., resistance less than

40) built –in buzzer will sound.

DIODE TESTING

Insert the black and red test leads into the

COM and VHz input terminals respectively.

Set rotary switch at desired position.

Push FUNC. button to select . The red

lead should be connected to the anode and

the black lead to the cathode of the diode.

The typical voltage drop should be about

0.6V for silicon diode or 0.3V for germanium

11 

diode. If the diode is reverse biased or there

is an open circuit the reading displayed will

be “OL”.

CAPACITANCE MEASUREMENT

Insert the black and red test leads into the

COM and VHz input terminals respectively.

Set the rotary switch to position.

Connect test leads across the capacitor

under measurement and be sure that the

polarity of connection is observed. The

polarity of the red lead connection is positive

“+”.

Read the measure result from the display.

FREQUENCY MEASUREMENT

Insert the black and red test leads into the

COM and VHz input terminals respectively.

Set the rotary switch to Hz position.

Connect the test leads across the source or

load under measurement. The polarity of the

red lead connection is positive “+”.

12 

Read the measure result from the display.

NOTE:

The signal amplitude must also be greater

than the sensitivity level.

Determine that the amplitude level of the

signal to be measured is not greater than the

input voltage limit (250V DC/AC rms.).

ADP MEASUREMENT

It is standby for user.

Insert the black and red test leads into the

COM and VHz input terminals respectively.

Set the rotary switch toADP position.

DCV ≤ 600mV .

SPECIFICATIONS

Accuracy:

±% of reading ±number of least significant digits

at 18℃to 28℃, with relative humidity up to 75%.

All specifications assume less than 1 year since

calibration. Temperature coefficient:

0.1×specified accuracy/℃.

13 

GENERAL

Maximum voltage:

1000V CATII 600V CATIII

Altitude:

2000m

Display:

LCD 5999 counts,

Updates 2-3/sec

Ranging method:

Auto/manual range mode

Polarity indication:

“” display for negative

polarity

Overrange indication:

LCD will display “OL”

Low battery:

“” will appears on LCD

Jaw capability:

40mm,Max conductor size

Power:

Battery 1.5V3

Size AAA

Size:

225mm×86mm×32mm

Weight:

Approx. 330g

Operating:

5℃to 35℃

Storage temperature:

10℃to 50℃

14 

DC VOLTAGE

Range

Resolution

Accuracy

1mV

（0.8%of rdg +5 digits）

60V

10mV

600V

0.1V

1000V

（1.0%of rdg +2 digits）

Input Impedance: 10M

Overload Protection: 1000V DC or 700V AC RMS

AC VOLTAGE

Range

Resolution

Accuracy

1mV

（1.2%of rdg +5 digits）

60V

10mV

600V

0.1V

700V

Input Impedance: 10M

Frequency range: 40Hz to 400Hz

Overload Protection: 1000V DC or 700V AC RMS

AC CURRENT

Range

Resolution

Accuracy

600A

0.1A

（2.5%of rdg +5 digits）

1000A

（3.0%of rdg +5 digits）

15 

Frequency range: 50Hz to 60Hz

Overload Protection:

120% ranges for 60 seconds max

RESISTANCE

Range

Resolution

Accuracy

600

0.1

（1.0% of rdg +3 digits）

6k

1

60k

10

600k

0.1k

6M

1k

60M

10k

（5.0% of rdg +5 digits）

Overload Protection:

250V dc or rms, ac for all ranges

CAPACITANCE

Range

Resolution

Accuracy

600nF

0.1nF

（4.0%of rdg +5 digits）

6uF

1nF

60uF

10nF

600uF

0.1uF

1000uF

1uF

Overload Protection:

250V dc or rms, ac for all ranges

16 

FREQUENCY

Range

Resolution

Accuracy

40Hz

1Hz

（0.1% of rdg +1digit）

600Hz

1Hz

6kHz

1Hz

60kHz

10Hz

100kHz

0.1kHz

Measurement range:

1V to 10V rms, 40Hz to 100kHz

ADP

Range

Resolution

Accuracy

600mV

0.1mV

（3.0%of rdg +5 digits）

AUDIBLE CONTINUITY AND DIODE

Range

Description

If continuity exists (about less than

40), built-in buzzer will sound.

Show the approx, Forward voltage of

the diode.

AUTO POWER OFF

To extend the battery life, Auto Power Off function

is provided. If no key operations of range changing

17 

happen about 10 minutes, the meter will be turned

off automatically. To turn it on, pushing the FUNC.

Button only.

REPLACING THE BATTERY

WARNING

To avoid electrical shock or personal

injury, remove the test leads and any

input signals before replacing the

battery. Replace only with same type

of battery.

When the electrical tester displays the “ ” mark

or the backlight be not very lit, the battery must be

replaced to maintain proper operation. Use the

following procedure to replacing the battery:

The Rotary Switch is used to select OFF.

Disconnect test leads from any live source

and remove the test leads from the input

terminals.

18 

Remove screws on the battery cover and

open the cover.

Remove the exhausted battery and replace

with three new 1.5V size AAA batteries.

Place battery cover and secure by a screw.

CAUTION

Using this appliance in an environment

with a strong radiated radio-frequency

electromagnetic field (approximately

3V/m) may influence its measuring

accuracy.

ACCESSORIES

Operator’s instruction manual

Set of test leads

Gift box

Battery 1.5V3 Size AAA

19 

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