Range
Resolution
Accuracy
600μA
0.1μA
6000μA
1μA
60mA
10μA
600mA
100μA
±(1.2% of rdg + 2 digits)
6A
1mA
10A
10mA
±(2.0% of rdg + 3 digits)
Range
Resolution
Accuracy
6V
1mV
60V
10mV
±(1.0% of rdg + 3 digits)
600V
100mV
±(1.5% of rdg + 3 digits)
Range
Resolution
Accuracy
600mV
0.1mV
6V
1mV
60V
10mV
±(0.5% of rdg + 2 digits)
600V
100mV
±(0.8% of rdg + 2 digits)
MT873
Digital Multimeter
Introduction
The MT873 multimeter is a slim sized, portable, robust drop proof digital multimeter. The
MT873 has a 6000 count digit LCD monitor with large 25mm digits that offer clear and
easy reading. The circuitry design is centred on large-scale IC A/D converters in
conjunction with an over-load protection circuit, the meters offers excellent performance
and is ideal for a versatile digital multimeter.
The meters can be used to measure DC & AC voltage, DC & AC current, resistance,
capacitor, frequency, duty cycle, temperature, Non Contact AC Voltage (NCV) detection,
diode test and audible continuity. If the equipment is used in a manner not specified by
the manufacturer, the protection provided by the equipment may be impaired.
This Equipment Conforms to UL STD. 61010-1, 61010-2-030 and 61010-2-033; Certified to
CSA STD. C22.2 NO. 61010-1, 61010-2-030 and 61010-2-033.
1
.
CDS
sensor: The CDS sensor can reaction to the ambient brightness range, then
automatically control the LCD backlight to lighten or go out.
2.
NCV detection area: Non Contact AC Voltage (NCV) detection area.
3.
NCV red light: Non Contact AC Voltage (NCV) detection red light.
4.
NCV green light: Non Contact AC Voltage (NCV) detection green light.
5.
LCD display: 6000 counts digit, full function symbol display.
6.
SELECT
key: This key work on the “ ” range, press the key to c hoose resistance,
.
diode or continuity test, on the voltage or current range, change to DC or AC, on the
°C/°F
range, change to °C or °F test; I f press a
nd hold SELECT key to power on, “Auto
Power Off ” function will be disabled.
7.
RANGE
Key: Press the “
RANGE
” key, the meter enters manual range mode, press it
more than 2 seconds again, return to auto mode.
8.
HOLD
key: Press the “
HOLD
” key to lock display value, and the “
DH
” sign w
ill appear
on the display, press it again to exit.
9.
REL
Key: Press the “
REL
” key, the meter enters relative measuring mode, “
REL
” is
displayed on the LCD and the present reading becomes the reference value and
displayed on the display. Relative measurement REL =measurement value-Reference
value. Press it again to exit.
10.
Hz/%
Key: On “ACV/ACA” or “Hz” range, press the “
Hz/%
” key, you can choose the
Frequency
or
Duty Cycle
measurement.
11.
Rotary Switch
: Use this switch to select functions and ranges.
12.
COM
: COM and Temperature “
-
” Input Jack.
13.
10A
: 10A Input Jack
14.
VΩmA
: V/μAmA/Hz/
Ω /
and Temperature “
+
” Input Jack
15. Meter casing
16. Protective casing
Safety Information
1.
The meter is designed according to IEC-61010 concerning e
lectronic m
easuring
instruments with an over-voltage category 600V (CAT II) or 300V (CAT III) and
pollution 2.
2.
Follow all safety and operating instructions to ensure that the m
eter is u
sed safely and
is kept in good operating condition.
3.
Safety symbols:
Important safety information, refer to the operating manual.
Dangerous voltage may be presence
Double insulation (protection Class II)
Special Cautions for Operation
1.
The meters can be safe only according to standard procedures w
hen used i n conjunction
with the supplied test leads. Please replace damaged test leads with the same
specifications.
2.
To avoid risk of electric shock, do not use the meter if the casing h
as been o
pened.
3.
The range switch should be in the right position before making a m
easurement.
4.
To avoid electric shock and damaging the instrument, the input s ignals must n
ot exceed
the specified limits.
5.
When measuring TV set or switched power, attention should be p
aid to the p
ossible pulses
that may cause damage to the circuitry.
6.
Range switch position must not be changed at random during m
easurement.
7.
Take caution against shock in the course of measuring voltage h
igher than D
C 60V & AC
30V.
8.
Protection fuse should be replaced only with same type and same s pecification.
9.
After using the meter, set function switch to OFF to save battery p
ower.
10. If the meter is not used for a long time, take out battery to avoid d
amage b
y battery
leakage.
General Specifications
1
.
Max Voltage between input terminal and Earth: CAT II 600V or CAT III 300V
2.
Over-range Indication: display “OL” for the significant digit.
3.
Automatic display of negative polarity “
-
”.
4.
Low Battery Indication: “ ” displayed.
.
5.
Max LCD display: 6000 counts digit.
6.
Auto range & Manual range control
7.
Auto Power Off: When measurement exceeds 15 minutes without c hanging t he mode and
pressing key, the meter will switch to standby mode. Press any key to exit standby mode.
When switching the meter back on, press and hold the
SELECT
key to disable auto power
off.
8.
Auto LCD backlight
9.
Fuse protection: 600mA/600V Fast Fuse, 10A/600V Fast Fuse
10. Power supply: 9V 6F22 battery
11. Operating Temp.: 0
to 40
(relative humidity <85%)
°C
°C
12. Storage Temp.: -10
to 50
(relative humidity <85%)
°C
°C
13. Guaranteed precision Temp.: 23±5
(relative humidity <70%)
°C
14. Dimension: 150 x 100 x 36mm
15. Weight: approx. 250g (including battery)
Testing Specifications
Accuracy is specified for a period of year after calibration and at 18
to 28
(64
to 82
)
°C
°C
°F
°F
with relative humidity to 70%.
DC Voltage
* Impedance: 10MΩ, More than 100MΩ on 600mV range
* Overload protection: 600V DC or AC RMS
AC Voltage (True RMS)
* Impedance: 10MΩ
* Overload protection: 600V DC or AC RMS
* Frequency Range: 40 to 400Hz
DC Current
* Overload protection: 600mA/600V Fast Fuse, 10A/600V Fast Fuse,
10A up to 10 seconds
Panel Layout
Resistance
Range
Resolution
Accuracy
600Ω
0.1Ω
±(1.0% of rdg + 3 digits)
6kΩ
1Ω
60kΩ
10Ω
600kΩ
100Ω
6MΩ
1kΩ
±(1.0% of rdg + 2 digits)
60MΩ
10kΩ
±(1.5% of rdg + 3 digits)
Range
Resolution
Accuracy
600μA
0.1μA
6000μA
1μA
60mA
10μA
600mA
100μA
±(1.5% of rdg + 3 digits)
6A
1mA
10A
10mA
±(2.5% of rdg + 5 digits)
AC Current (True RMS)
* Overload protection: 600mA/600V Fast Fuse, 10A/600V Fast Fuse,
10A up to 10 seconds
* Frequency Range: 40 to 400Hz
* Overload protection: 600V DC or AC RMS
1
4
9
10
14
15
16
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3
5
6
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8
11
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