99 Washington Street Melrose, MA 02176
Phone 781-665-1400 Toll Free 1-800-517-8431
MT-2017
Protective Function Analog Multimeter
User’s Manual
1st Edition, 2015
©2015 Copyright by Prokit’s Industries Co., Ltd.
INTRODUCTION
This Multi-meter is an accurate, safe handheld meter that comes
with robust protective holster alongside, built-in stand and hook-up
design. MT-2017 is powered by batteries, offers accurate, reliable
measurement of DC/AC Voltage, +/-DCV, DC Current, Resistance
and Diode, LED, Transistor, Decibels, Continuity test and
Capacitance with very high sensitivity quality movement.
This meter is designed with double-sided glass-epoxy PCB, full
overload & misused protection via two Fuses, Oxide Varactor &
Diodes, as well as mirrored Aluminum dial plate. Ideal for indoor
use in the laboratory, school, workshop, hobby and home
applications.
SPECIFICATION
Safety Category: IEC61010-1, CAT II 1000V, CAT III 500V and
Pollution Degree 2.
Common Environment: 23C5C, less than 75% RH.
Operating temperature: 0C to 40C, 32 F to 104 F
Storage temperature: -10 C to 50C, 14 F to 122F
Operating Humidity Scope: less than 90% RH.
Storage Humidity Scope: less than 80% RH.
Dimensione: 171(W) x 108(D) x 37(H) MM
Weight: 390g approx. (including batteries 3pcs)
Accessories: One pair of test leads;
Two Spare Fuses: 0.5A/250V & 10A/250V, Φ5x20mm
Test
Functions
DC V 0-0.1-2.5-10-50-
Null DCV ±-5V, ±25V 5% FSD.
AC V 0-10-50-250V
Range Accuracy Remarks
250 V-1000V
-1000V
3% FSD.
4% FSD.
For 1000V
4% FSD.
5% FSD.
1
Input Impedance:
20KΩ /V Overload
Protection: Max.
1000V AC/DC
BUT 0.1V/2.5V/10V
250V Max.
Input Impedance:
40KΩ /V Overload
1000V Max.
Input Impedance:
9KΩ /V Overload
For 1000V Protection: Max.
DC mA 0-0.05-2.5-25-25
Ω X 1: 0.2 ~ 2KΩ
Capacitance
(uF)
BATT Check 0 ~ 1.5V: GOOD
Transistor
Check
LED, Diode via special hFE Approx. At Ω X 10 Range
0 mA, 10A
Midscale at 20Ω
X 10: 2 ~ 20KΩ
Midscale at
200Ω
X 100: 20 ~
200KΩ
Midscale at
2000Ω
X1K: 200~ 2MΩ
Midscale at
0KΩ
X10K: 2K
~20MΩ
Midscale at
200KΩ
C: 2,000uF Max.. Approx.
- ? – BAD
0 ~ 9V: GOOD
- ? – BAD
hFE: 0-1000 via
special hFE
socket
3% FSD.
4% FSD.
For 10A
4% of
ARC of
Scale
Length
Value
5% of
ARC of
Scale
Length
Approx.
Value
1000V AC/DC
But 10V/50V only
250V Max. Band
width: 40 ~10K Hz
Drop Voltage: 250
mV Overload
protected by Fuses
0.5A/250V & 10A /
250V at 10A range,
and Oxide
Varactor.<250V
AC/ DC(5s). Max.
test time 15sec. for
10A.
Overload protected
by the Oxide
Varactor & Fuse
<250V AC/DC (5s).
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 Ω X 10 Range
2
Check socket Value
Decibel -22 dB ~ + 62
Continuity
Check
POWER
Source
dB (0dB=1mW
at 600Ω )
Beeper
sounding under
200 Ohm
Internal Battery:
R3P, AAA, 1.5V
2pcs, 6F22,
NEDA1604, 9V
1pc
Approx.
Value
Overload protected
At ACV ranges
Via Test Leads
by Fuse & Oxide
Varactor .<250V
AC/DC(5s).
CALIBRATION
Ohms Zero Adjustor located at the right side of the panel.
Adjust 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 side 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.
STAND & HOOK-UP
This meter can be used in any operating position. It has two rear
support devices, i.e. the upper small bracket and the lower big tilt
device. The upper one not only performs the light slanted position,
but also hook-up the tester which makes it easier to place the
tester and read the display when measuring.
And the lower big tilt device can provide the steeper slant degree
position easy for user’s reading too.
Hook-up
Upper Tilt
Device
Big Lower
Tilt Device
3
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, and 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.)
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.
When the voltage or current to be measured it not known,
3.
always start with the highest range.
4. If meter indication is in the lower half of the scale and falls
w
ithin the range
lower range for greatest accuracy.
5. If the meter won’t work 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 enco
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
of a lower scale, reset selector switch to the
untered and do not store in excessively
hot or
4
“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 circuit as
quickly as possible, check instrument operation on that range
by applying peoper input. If the meter does not operate
properly, check fuse. If it is blown replace it. (See fuse
replacement.)
OPERATION PROCEDURES
DC Voltage Measurement
WARNING: USE EXTREME CARE WHEN MAKING
MEASUREMENTS FOR HIGH VOLTAGE. 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 circ
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.
uit to be tested, connect the
Null DCV (Central Zero) Measurement
At these two ranges, it can automatically judge the polarity of
circuit as the pointer can move to the center line and become a
Null meter.
1. Set the selector switch to the DCV ±5V or 25V range.
Connect the B
2.
test lead to the Red “+” jack.
LACK test lead to the “-
5
COM” jack and the RED
3. Set the Zero Ω adjustor to place the pointer exactly to the
Central Zero position
4. Connect the test leads across the circuit or load under
measurement.
Take the readings on the Red dial Null DCV scale.
5.
NOTE: If the needle failed to be set at Central Zero position
power of 9V battery may be weak and should be replaced by
new one for normal working.
AC Voltage Measurement
WARNING: USE EXTREME CARE WHEN MAKING
MEASUREMENTS FOR HIGH VOLTAGE. 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.)
Connect the BLACK test lead to the “-COM” jack and the RED
2.
test lead to the“+” jack.
3. Check the needle position and the get the reading on V.A
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 lef
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. For
large current max. 10A, move the red test lead to the Red “10A”
jack.
if need.
, the
scale.
t,
6
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 or
10A/250V. The max. testing time once must be not more than
15sec. and pause 5min. for next time at big current load.
The Maximum terminal voltage drop is 250mV except for the
10A range.
Note: If connected incorrectly with the voltage at these ranges,
quickly remove the test leads from the circuit as to avoid
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 Ω range to be used.
Connect the BLACK test lead to the “-COM” jack and the RED
2.
test lead to the Red “+” jack.
Short the leads by touching the probes together. Pointer should
3.
read zero at the right hand end of the upper most scale, if it
doesn’t, use the Ohm adjust knob on the right hand of the panel
to line up the pointer with zero. (If pointer can’t be brought to
zero, replace battery.)
4. Connect the test leads across the resistance to be measured.
5. Take reading on the top “Ω” scale and multiply it by the
multiplication factor indicated by the selector switch.
6. If there is little or no pointer movement from the left side of the
scale, reset the selector switch to higher range. The effective
reading scope on an Ohm meter scale is within the area of
between 25 degree of Arc left side to the Midscale and 25
degree right side to the Midscale.
Note: If connected incorrectly with the voltage, quickly remove
7
the test leads from the circuit as to avoid damage to this tester.
(This tester can afford the voltage <250V DC/AC rms. for the
period of 5 seconds max.)
Diode Measurement
1. Set the selector switch to the appropriate Ω range to be used.
NOTE: To test the diode while current below 0.060 mA at X 10K
range; current below 0.15 mA at X 1K range; current below 1.5
mA at X 100 range; current below 15 mA at X 10 range; current
below 150 mA at X 1 range.
2. For IF (forward current) test, put the BLACK test lead to the
“-COM” jack and the RED test lead to the Red “+” jack. And then
connect the Black probe to the Positive terminal of the Diode,
the Red probe to the Negative terminal of the Diode.
For IR (reverse current) test, reverse the connection.
3. Read the value IF or IR of the diode on the LI scale.
4. Read the linear (forward voltage) VF of the diode on the LV
scale.
Continuity Test
WARNING: DO NOT APPLY VOLTAGE TO MEASURING
TERMINAL WHILE RANGE SWITCH IS IN OHM POSITION.
Set the selector switch to the BUZZ range. Connect the test leads
to two points of circuit. If the resistance is lower than 200 Ohm
approx., the Beeper sounds.
Note: Battery voltage is sufficient for Buzzer operation as long as
the Zero Ohm pointer can be adjusted to the Zero scale place.
Note: If connected incorrectly with the voltage, quickly remove
the test leads from the circuit as to avoid damage to this
tester..
(This tester can afford the voltage <250V DC/AC rms. for the
period of 5 seconds max.)
8
Transistor hFE and LED Test
1. Set the selector switch to the R X 10 range.
FOR Measuring Transistor hFE
2. Take note the type of transistor “PNP” or “NPN” and then insert
the transistor terminals of the Emitter, Base and Collector
separately into the proper holes of the socket on the front panel.
3. Read the approximate hFE Value directly at the hFE scale.
Note: Current 10μA. VCE 2.8V.
When the Base terminal cut, the value of Leak is Iceo for
4.
Transistor.
FOR Measuring LED: Insert the transistor terminals directly into
the “+” and
And then check if the LED under testing is lighting.
Battery Check
1. This meter comes with two separate battery check ranges to test
either DC 1.5V or 9V batteries.
Set the selector switch to the appropriate BATT range to be
2.
used.
3. Connect the BLACK test lead to the “-COM” jack and the RED
test lead to the Red “+” jack.
4.
Connect the Red test lead to the positive end of battery a
Black one to the negative end of the battery to be measured.
5. Take reading on the “BATT” scale and check it good or bad as
per which portion indicated.
(Note: the mark section of “?” shows that the battery may be
starting to decay.)
Note: If connected incorrectly with the voltage, 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.)
“-” holes of the socket on the front pane
l.
nd the
9
Loading...