Prokit's Industries MT-1217 User Manual

MT-1217

3-3/4 Autorange Digital Multimeter

User’s Manual

1st Edition, 2013
©2013 Copyright by Prokit’s Industries Co., Ltd.

Contents

General-------------------------------------------------------------------------1
Open-Package Inspection-------------------------------------------------2
Safety Note -------------------------------------------------------------------2
Instrument Panel& Button Function Description----------------------5
Other Functions---------------------------------------------------------------6
Property-------------------------------------------------------------------------6
Instrument Maintenance---------------------------------------------------16
Fault Elimination-------------------------------------------------------------17

General

This product is equipped with the LCD display of text height
20mm, is a 3 3/4 digital multimeter which has the merits of clear
reading, stable performance and high reliability. It can be used to
measure DC voltage, AC voltage, DC current, AC current,
resistance, capacity, frequency/duty cycle, diode and make
on-and-off test. Meanwhile, it is available for unit symbol display,
automatic/manual range switching, automatic power off and
alarm function. The multimeter has high resolution and precision,
due to its complete functions, high measurement accuracy and
convenient operation,
troubleshooting

ideal for general electrical testing and

1

Open-package Inspection

Open the package box and take out the meter, check carefully
if the following accessories are absent or damaged. If there
is any absence or damage, please contact the distributor
immediately.
Digital multimeter 1 PC
User’s manual 1 copy
Test leads 1 pair
Temperature Probe (K-Thermocouple) 1 PC
Test socket 1 pc

Safety Note

The design of this meter is accordance with IEC1010 clause (the
safety standard issued by International Electro technical
Commission). Prior to the operation of the instrument, please
read the safety considerations before use.

1. When DC voltage above 30V, AC voltage above 25V, current
above 10mA, AC power line with inductive load or power line
during electric fluctuation is measured, please beware of
electric shock.

2. Prior to measurement, check if the measurement function
switch is at the correct position. Check if the test lead is
contacted reliably, connected correctly, and grounded well
and etc. in order to avoid electric shock.

3. Only if the meter is used with the matched test lead, will it
can of the test lead is damaged, it is necessary to replace
with another one of the same model or the same electrical
specification.

4. Don’t use other unconfirmed or disapproved fuse to replace
the fuse inside the meter. Only the same model or same
specification fuse can be replaced. Before the replacement,
the test leads must be removed from the measuring point to
ensure there is no longer any signal at the input terminal.

2

5. Don’t use other unconfirmed or disapproved battery to
replace the battery inside the meter. Only the same model or
same electrical specification battery can be replaced. Before
the replacement, the test lead must be removed from the
measuring point to ensure there is no longer any signal at the
input terminal.

6. When the electrical measurement is made, never let your
body get in touch with the ground directly, and don’t touch
uncovered metal terminal, output port, lead clamp and etc.
where earth potential may exist. Dry clothes, rubber shoes,
rubber cushion and other insulating material are usually used
to keep your body insulated against the ground.

7. Don’t store and use it in the high-temperature, high-humidity,
inflammable and strong magnetic field environment.

8. It may damage to the meter and endanger the operator’s
safety if the voltage value beyond the permitted ultimate
voltage value is measured. The ultimate voltage value
permitted for measurement is marked on the instrument
panel, and never measure the value exceeding the standard.
Don’t input the ultimate value out of regulation in order to
avoid electric shock and the damage to the meter.

9. When the test lead is inserted into the current socket, don’t
measure any voltage for fear that the meter should be
damaged and the operator’s safety be endangered.

10. Don’t try calibrating or repairing the meter. When necessary,
only the qualified professional personnel who have had
special training or gained approval can make it.

11. During measurement, the requirement of measurement
function must be in accordance with LCD display. Please be
sure to disconnect the line of the test lead with the measured
object first and ensure there is no any input signal. It is
forbidden to switch the function/range selection switch during
measurement

3

12. When “ ” is shown on LCD display, please replace
battery immediately to ensure the measurement precision.

13. It is not allowed to insert the test lead into the current
terminal to measure voltage!

14. Please don’t change the circuits of the meter freely for fear
that the meter is damaged and the safety be endangered.

15. Description of Safety Symbols

Warming!

Double

Insulation

Fuse

Low

Battery

Instrument Panel & Function Button Description

1. Instrument model number

2. LCD Display: Display the measured data and unit.

3. Function Button

3.1 Hz/% (F
Cycle): Press this button to
select the frequency or duty
cycle mode. The measurement
mode of V
duty cycle could be selected by
pressing this button in AC
voltage setting

3.2 RANGE: Press this button to
select the voltage/current test

range

requency / Duty

oltage / frequency /

In accordance with the

instruction of European

DCV

ACV

DCA

ACA

Trade Union

4

3.3 HOLD: date hold

3.4 REL △(Relative Value Measurement): The relative value

measurement of Capacity function could be conducted by
pressing this button

3.5 Select(Function Switch): Press this button, the function
could switch between resistance, capacity and
AC/DC current。

3.6 LCD backlight button

4. Knob Switch: It could be used to change the measurement
function and range.

5. Input Terminals

5.1. 10A “+”input terminal.

5.2. mA “+” input, Temperature “+” Input, Capacity and HFE

input terminal

5.3. Voltage, Diode, Resistance, Frequency, Buzzer Input

terminal

5.4. COM: Current, Voltage, Diode, Resistance, Capacity,

Frequency, Buzzer, Temperature “-”, HFE, Input terminal.

Other Functions
Auto Power off

During measurement, the meter will automatically shut down
(enter sleeping mode) to save power if function buttons and knob
switch are not operated in 15 minutes. In auto power off mode,
press any function buttons or rotate the knob switch, the
instrument will get into the auto power on mode (working mode)

Property
General Feature

1-1 Display: LCD
1-2 Max Display: 3999(3 3/4) counts automatic polarity display

and unit display

5

；

1-3 Measuring Method: Dual integral A/D converter
1-4 Sampling Rage: Approx. 3 times / sec.
1-5 Over Range Indication: Display “OL”
1-6 Low Battery Indication: “
1-7 Operation Environment: (0~40)˚C Relative Humidity:<80%
1-8 Storage Environment: (0~50)˚C Relative Humidity:<80%
1-9 Power: a 9V battery (NEDA1604/6F22 or equivalent)
1-10Dimension (size): 182×90×46mm
1-11 Weight: Approx. 320g (not including 9V battery)
1-12 Accessories: User’s Manual (1 pc), color box (1 pc), 10A test

leads (1 pair), K-Thermocouple(1 pc) , test
socket (1 pc).

Technical Feature

2-1. Accuracy: ± (a% × reading + digits),at (23±5)˚C, relative

Humidity <75%. One year calibration guarantee since the
time dispatched from the factory.

2-2. Technical Specification

2-2-1. DCV

A) Turn the knob switch to “
B) The initiate state of the meter is in automatic range status,

which shows “AUTO” symbol

C) Make the test lead contacted to the testing point. The voltage

and polarity of the point where the red pen is contacted will be
displayed on the screen.

” symbol appears;

“ Range

Caution:

1. Don’t measure voltage over 1000V. Otherwise, there is a
danger of meter being damaged.

2. When measuring high voltage, special attention should be
given to personal safety and avoid your body getting in touch
with high voltage circuit.

6

Range Accuracy Resolution
400mV 100uV
4V 1mV
40V 10mV
400V
1000V ±(1.0%+6d) 1V

 Input Impedance: 10MΩ .
 Overload Protection: 1000V DC or AC peak value

2-2-2. ACV

A) Insert black test lead into the hole of “COM” and red test lead

“

into “

B) Rotate function switch to “

the meter is in automatic range status, which shows “AUTO”

symbol
C) press “Range” button can select the AC measurement range
D) Make the test lead contacted to the testing point. The voltage

of the point where the red test lead is contacted will be

displayed on the screen.

Caution:

1. Don’t measure voltages over 750V, otherwise, the meter will

be damaged.

2. When measuring high voltage, special attention should be

given to personal safety and avoid your body getting in touch

with high voltage circuit.

Range Accuracy Resolution
4V 1mV
40V 10mV
400V
750V ±(1.0%+10d) 1V

±(0.5%+4d)

100mV

“ setting , the initial state of

±(0.8%+10d)

100mV

7

 Input Impedance: 10MΩ .
 Overload Protection: 1000V DC or 750 AC peak value.
 Frequency Response: (50~200) Hz
 Display: Average value response (RMS of sine wave).

2-2-3. DCA

A) Insert the black test lead into the “COM” input terminal and

red test lead into the “mA “ input terminal. (Max 400mA), or

“10A “input terminal (Max 10A).
B) Rotate function switch to Current setting. The initial state of

the meter is in automatic range status, which shows “DC”

symbol. Then connect the test lead to the tested circuit in

serial, the tested current value and the current polarity of the

point where the red pen is contacted will be displayed on the

screen simultaneously.

Caution:

1. If “OL” is displayed on LCD, it indicates the tested current

value has exceeded the present range limit, please select

higher range to complete the measurement.

2. The Max input value is 400mA or 10A. (Depending on the

terminal where the red test lead is contacted)

Range Accuracy Resolution
400uA 0.1uA
4000uA 1uA
40 mA 10uA
400mA
4A ±(1.2%+10d) 10mA
10A ±(1.2%+10d) 10mA

 Max measurement voltage drop: Full Range mA is 0.4V, A is

100mV;

 Max input current: 10A (less than 15 seconds);
 Overload Protection: 0.4A/250V resettable fuse, 10A/250V

fuse.

±(1.0%+10d)

100uA

8