Prokit's Industries MT-2018 User Manual

MT-2018
Protective Function Analog Multimeter

User’s Manual

1st Edition, 2013

©2013 Copyright by Prokit’s Industries Co., Ltd.

INTRODUCTION

This Multi-meter is an accurate, safe, battery operated, rear
tilt-stand, easy to operate handheld instrument with robust
protective holster alongside and the adjustable back tilt device
with hook-up design. It can offer accurate, reliable measurement
of DC/AC Voltage, DC Current, Resistance and Diode, LED,
Transistor, Decibels, and Capacitance with very high sensitive
quality movement, and good-designed circuit, as well as mirrored
Aluminum dial plate etc. It has the perfect full overload &
miss-used protection via Fuses, Oxide Varactor & Diodes. It is an
ideal instrument for indoor use in the laboratory, school, workshop,
hobby and home applications.

SPECIFICATIONS

Safety Category: IEC61010-1, CAT II 1000V, CAT III 500V and

Pollution Degree 2.
Common Environment: 23C5C, less than 75% RH.
Temperature Ranges:
0C to 40C, 32 F to 104 F for Operating condition.

-10 C to 50C, 14 F to 122F for Storage condition.
Humidity Scope: Operating condition less than 90% RH.

Storage condition: less than 80% RH.
Size: 160(W) x 105(D)x 40(H) MM
Weight: 390g approx. (including batteries 3pcs)
Accessories: One set of Test Leads; One Spare Fuse: 0.5A/250V,

Optional Accessory: MT-2007-C special for capacitance
measurements 1 set

1

Te st

Functio

ns

DC V 0-0.1-0.5-2.5-10-50

AC V 0-10-50-250V

DC mA 0-0.05-2.5-25-

 X 1: 0.2 ~ 2K

Range Accuracy Remarks

-250 V

-1000V

-1000V

250 mA,

midscale at 20
X 10: 2 ~ 20K
Midscale at 200
X 100: 20 ~ 200K
Midscale at 2000
X1K: 200~ 2M
Midscale at 20K
X10K: 2K ~ 20M

 3% FSD.
 4% FSD.

For 1000V

 4% FSD.
 5% FSD.

For 1000V

 3% FSD. Drop Voltage: 250

 4% of ARC

of Scale
Length

Input Impendence:
20K/V Overload
Protection: Max.
1000V AC/DC
BUT 0.1V/0.5V/

2.5V/10V/50V
/250V Max.

Input Impendence:
9K/V Overload
Protection: Max.
1000V AC/DC But
10V/50V only 250V
Max. Band width:
40 ~10K Hz

mV Overload
protected by Fuses

0.5A/250V, and
Oxide Varactor.
<250V AC/DC(5s).

Overload protected
by the Oxide
Varactor & Fuse
<250V AC/DC(5s).

2

Midscale at 200K

Capacit
ance
(uF)

BATT
Check

Transist
or
Check

LED,
Diode
Check

Decibel -22 dB ~ + 62 dB

POWE
R
Source

0.025-0.25-25uF
(C2)

2000uF(C1) Approximate

0 ~ 1.5V: GOOD

- ? – BAD
0 ~ 9V: GOOD - ?
– BAD

hFE: 0-1000 via
special hFE socket

via special hFE
socket

(0dB=1mW at
600)

Internal Battery:
R6P, AA, 1.5V
2pcs, 6F22,
NEDA1604, 9V 1pc

 3% FSD.

Value

 5% of ARC
of Scale
Length

Approximate
Value

Approximate
Value

Approximate
Value

Use the Optional
Accessory Kit
MT-2007-C

Use the R x 1K
range

Load Current:
270mA for 1.5V,
25mA for 9V.
Overload protected
by Fuse & Oxide
Varactor .<250V
AC/DC(5s).

At  X 10 Range

At  X 10 Range

At ACV ranges

3

CALIBRATION

Ohms Zero Adjustor located at the right side of the panel,
adjusting the meter pointer to the Zero mark on the right side
of Ohm scale of the meter dial when the test leads are touched
together.
Mechanical Adjustor Screw: located right below the center of
the meter dial to set pointer to Zero mark at the left side of the
scale.
(-) Jack: Plug-in connector at the lower left on the panel for
Black, negative test lead.
(+) Jack: Plug-in connector at the lower right on the panel for
Red, positive test lead.

OPERATING INSTRUCTIONS

CAUTION
When making voltage or current measurements, develop the

habit of turning off all power to the circuit under test. Connect
the test leads at the desired points in the circuit, then turn on
the power while taking readings. Turn off the power before
disconnecting the test leads from the circuit.

INTERNAL BATTERY CHECK

To check the battery condition, insert the black test lead into the
(-) jack. Set the range switch to the R X1 range position and
short the ends of the two sides of the test leads. If the pointer
can not be brought to the zero mark, replace the 1.5V cells or
9V cell. (See battery replacement.)

4

BEFORE OPERATING

1. Set the range switch to the proper position before making
any measurement.

2. Never apply more voltage or current than the rated value in
every position.

3. When the voltage or current to be measured it not known,
always start with the highest range.

4. If meter indication is in the lower half of the scale and falls
within the range of a lower scale, reset selector switch to the
lower range for greatest accuracy.

5. If the meter won’t wotk at all, check the fuse located on the
PCB. If it’s blown, replace it. (See fuse replacement.)

6. Avoid placing the meter where extreme shock or continuous
vibration is encountered and do not store in excessively hot
or damp places. Although very rugged, the meter is a
sensitive measuring device and should be handled carefully
& properly.

7. Do not check resistance, transistor, diode, LED, or
capacitance when live voltage or current input across the
circuit.

8. When the meter is not in use, keep the selector switch to the
“OFF” range position, this provides direct short across meter
movement for minimum needle bounce when transporting
meter.

9. If you should accidentally apply excessive voltage or current
on a certain range, disconnect the leads from the circuot as
quickly as possible, check instrument operation on that range
by applying peoper input. If the meter does not operate
peoperly, check fuse. If it is blown replace it. (See fuse
replacement.)

5

OPERATION PROCEDURES

DC Voltage Measurement

WARNING: WITH EXTREME CARE WHEN MAKING
MEASUREMENTS FOR HUGH VOLTAGE, AND DO NOT
TOUCH TERMINAL OR PROBE ENDS.

1. Set the selector switch to the appropriate DCV range to be
used.

2. Connect the BLACK test lead to the “-COM” jack and the RED
test lead to the “+” jack.

3. If you know the polarity of the circuit to be tested, connect the
black probe to the negative side.

4. If you don’t know the polarity, connect the probes to opposite
sides of the circuit and watch the pointer. If it goes to the left,
reverse the probes. The RED probe will be connected to the
positive.

5. Check the needle position and the get the reading on V.A scale.

AC Voltage Measurement

WARNING: WITH EXTREME CARE WHEN MAKING
MEASUREMENTS FOR HUGH VOLTAGE, AND DO NOT
TOUCH TERMINAL OR PROBE ENDS.

1. Set the selector switch to the appropriate ACV range to be used

and connect the test leads across the circuit or load under
measurement. (Polarity of the test probes is unimportant on
ACV test.)

2. Connect the BLACK test lead to the “-COM” jack and the RED

test lead to the“+” jack.

6

3. Check the needle position and the get the reading on V.A scale.

DC Current Measurement

WARNING: DO NOT APPLY VOLTAGE TO MEASURING
TERMINAL WHILE RANGE SWITCH IS IN CURRENT
POSITION DO NOT ATTEMPT TO MEASURE AC CURRENT.

1. Set the selector switch to the appropriate DC mA range to be

used and connect the test leads in series with the circuit or the
load under measurement. If the pointer deflects to the left,
reverse the probes.

2. Connect the BLACK test lead to the “-COM” jack and the RED

test lead to the Red “+” jack for Current at/less than 0.25A.

3. Check the needle position and the get the reading on V.A scale.

Note:
Excessive current input across mA range will blow the fuse
that must be replaced by a same fuse rating 0.5A/250V.
Note: If connected incorrectly with the voltage at these
ranges, quickly remove the test leads from the circuit and can
avoid the damage to this tester..
(This tester can afford the voltage <250V DC/AC rms. for the
period of 5 seconds max.)

Resistance Measurement

WARNING: DO NOT APPLY VOLTAGE TO MEASURING
TERMINAL WHILE RANGE SWITCH IS IN OHM POSITION.

1. Set the selector switch to the appropriate  range to be used.

2. Connect the BLACK test lead to the “-COM” jack and the RED

test lead to the Red “+” jack.

7