MasterCraft 52-0052-2 Instruction Manual

®

Auto-ranging
Digital Multimeter

52-0052-2

INSTRUCTION MANUAL

WARNING: READ AND UNDERSTAND THIS MANUAL BEFORE USING YOUR MULTIMETER. FAILURE TO UNDERSTAND AND COM PLY WITH WARNINGS AND OPERATING INSTRUCTIONS
CAN RESULT IN SER IO US OR FA TAL IN JU RI ES A ND /O R PROPERTY DAMAGE.

MASTERCRAFT CANADA TORONTO, CANADA M4S 2B8

2

4

5

52-0052-2

HOLD

hFE

7

9

DC

/ /½/ AC/

AUTO POWER OFF

OHM

/

DC

Hz/%

Mastercraft

Range

Relative

OFF

Data

Hold

Backlight

NPN

E

B
C

E

PNP

E

B

C
E

hFE

1

10

8

3

AC/DC

10 A

µ A/mA

AUTO-RANGING

SE L EC T IO N A UT OMA TIQUE

TEMP

FUSE D

10 A

Fig.1

µ

FU SED
40 0m A

MA X

MAX

A

V/½/F / /

CA P

CAT II

100 0V DC

75 0V AC

C O M

MAX

5 0 0 V M A X

6

Before operating your multimeter, become familiar with each control. A

clear understanding of how your multimeter works will help to avoid
mistakes and minimize measurement errors, instrument damage and the
possibility of injury.

SAFETY INSTRUCTIONS

This meter has been designed for safe use, depending on UL61010-1, but
must be operated with caution. The rules listed below must be carefully
followed for safe operation.

(1) NEVER operate this device when the back cover is open or not properly

attached in its place.
(2) Make sure that the insulation of leads is not damaged.
(3) When “BAT”appears on the display, change both batteries for the accuracy

of measurement.
(4) NEVER apply voltage to the meter that exceeds the specified maximum:

DC1000 or AC 750V.
(5) USE extreme caution when working with voltage over the 36V safe point.
(6) NEVER change the position of the function switch during measuring.
(7) CHOOSING the right positions of all function switches before testing.
(8) NEVER change any connection on the circuit board of the meter.
(9) USE only damp cloth or mild detergent to clean the outside of the meter.
(10) Safety Symbols:

Hazardous voltage

Read the manual first

Connect to common ground

This product is protected by DOUBLE INSULATION. Service of this
multimeter by a professional person only. Otherwise it could hamper
the safe operation and severe injury or even death may result.

The following section, in conjunction with Fig.1, will describe the proper functions of your
multimeter.

1. LCD

3 3/4 digit

2. Function/Range switch

Use to select the desired measurement or "OFF" position.

3. 10 A Jack

Plug-in connection for red (positive) test lead for DC 10 A measurements only.

4. mA/µA Jack

Plug-in connection for red (positive) test lead for current measurements up to

400 mA only.

5. Common Jack

Plug-in connection for black (negative) test lead.

6. V/

ΩΩΩΩ

F/ / /CAP Jack

Plug-in connection for red (positive) test lead for all voltage, capacitance, frequency,
resistance and continuity measurements, and diode checks.

7. Range/hold Button

Use to manually select the desired range. When first turned ON, the
multimeter goes into auto-ranging and the word "AUTO" will appear in the upper

left corner of the display. When this button is pressed, a manual range is
selected and the "AUTO" will disappear from the display. Each additional push
causes the range to go higher. When the highest range is reached, the next
push returns the range to its lowest point. To cancel the manual range and
return to auto-ranging, press and hold the button until "AUTO" appears on the
display.

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8. Data Hold & Backlight Button

Use to hold a reading. When this button is pressed, the data being displayed will
be frozen on the LCD and "HOLD" will appear. Changes in the input signals will

not change the display. It can be used in all measurements modes. Press the
button again to release this function and the "HOLD" will disappear.
Press and hold this to turn the backlight on. When the backlight is on, "HOLD"
will appear on the LCD, press this button once to cancel the "HOLD" feature. To
turn off the backlight, press and hold this button until the backlight goes off. The
"HOLD" will also appear on the LCD, press this button once to cancel.

9. / /

In the OHM / mode, use this button to choose between continuity check or
diode test or resistance test.

In the A AC and D DC mode, use this button to choose between A AC and D DC
ranges.
In the FREQ mode, use this button to choose between frequency test and duty
cycle test.

10. Relative Button

ΩΩΩΩ

AC/DC Hz/% Button

Use this button to measure the different (relative) value between parts and the
reference.

For example, during the measurement of a +5 V standard DC voltage, press this
button once, the value on the LCD will be changed from +5 V to 0 V.
Disconnect the test lead from the source (-5 V will be displayed on the LCD).
If you measure a +4.5 V DC source, the LCD will display -0.5 V. This is indicating
that the value you measured is 0.5 V lower than the standard value.

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