Metravi 23Smkll Operation Manual

DIGITAL MULTIMETER

OPERATION MANUAL
Metravi 23Smkll

1. SUMMARIZE

The instrument is a steady performance, battery-driven digital 4 1/2
digit digital multimete. It uses the LCD with 39.5mm-high figure to make
the reading clear.The function of 5 sec. Backlight displaying and overload
protection make operation more converient.
The instrument has the function of measuring DCV, ACV, DCA,ACA
resistance, capacitance, temperature and frequency, diode, and contin-
uity performance tset. It adops double intergral A/D converter as its core,
it is an excellent tool for labs,factories and radi-technology.

2. SAFETYNOTE

This instrument is designed according to IEC1010 standard(safety
standard issued by IEC),Please read the manual before operation.
1. Do not input a over range value when measuring.
2. Voltage less than 36V is a safety voltage. When measuring voltage
higher than DC 36V, AC 25V check the connection and insulation of
test leads to avoid electric shock.
3. Be sure to keep the test leads off the testing points when switching
function and range.
4. Select correct function and range to avoid fault operation, you may
still be careful to ensure the safety even the meter has all range
protection function.
5. Please do not measuring before battery isn't installed and back cap
is not firm.
6. Please do not input voltage when measuring resistance.
7. Please move the test leads away from test points and turn off the
power before replacing batter fuse.
8. Introduction for safety symbol
Input resistance: All range is 10MΩ.
Overload protection: 250V DC or AC effective value for range 200mV
1000V DC or 750V AC effective value.
B. ACV
Range Resolution
2V
100uV
±(0.8%rdg+25dgt)
1mV
20V
200V
10mV
100mV ±(1.0%rdg+25dgt)
750V
Input impedance: All range is 10M Ω.
Overload protection: 1000V DC or 750V AC effective value.
Frequency response: (40～400)Hz range under 200V;
(40～200)Hz for range 750V.
Displaying: Sine wave rms (Average value response).
C. DCA
Resolution
Range
200uA 0.01uA
±(0.5%rdg+4dgt)
2mA 0.1uA
20mA 1uA
±(0.8%rdg+6dgt)
200mA
10uA
±(2.0%rdg+15dgt)
1mA
20A
Max measurement voltage drop: 200mV
Max input current: 20A (within 10 seconds)
Overload protection: 0.2A/250V resettable fuse , 20A measuring
range 15A/250V time-lag fuse.
D. ACA
Range
Resolution
1uA
20mA
±(1.5%rdg+25dgt)
200mA 10uA
±(2.5%rdg+35dgt)
1mA
20A
1
Accuracy
Overload protection
1000V DC/
750V AC RMS
Accuracy
Overload protection
0.2A/250V MAX
15A MAX
Accuracy
Overload protection
0.2A/250V MAX
15A MAX
3
exists high voltage
GND
dual insulation

3. CHARACTERISTIC

3-1. General

1. Displaying: LCD dispaying.
2. Max,indication: 1999(4 1/2)digits,auto polarity indication.
3. Measuring method: double integral A/D conversion.
4. Sampling rate: approx 3 times/sec.
5. Over-range display: 1 displays in the highest digit.
6. Low battery display: "
7. Working environment:(0～40)℃, relative humidity <80%.
8. Power supply: one 9V battery (NEDA 1604/6F22 or equivalent).
9. Dimension: 190x94.5x39.5mm (length/width/height).
10. Weight: approx .400g (including 9V battery).
11. Accessories: test leads, user manual,temperature probe,holster,
gift box, and 9V battery.

3-2.Technical characeridtic

1
. Accuracy:± a% ( rdg+dgt) environment temperature at (23±5)℃,
x
relative humidity<75%, one year guarantee since production date.
2.Performance:
Measuring DCV, ACV, DCV, ACA, resistance Ω, capactiance C,
frequency f, temperature T, diode/continuity performance testing, with
auto power off, backlight and data hold function.
3. Technical Parameter
A. DC Volt (DCV)
Range
Resolution
200mV
10uV
2V
100uV
±(0.1%rdg+5dgt)
20V
200V
±(0.2%rdg+5dgt)
1000V
100mV
Max measurement voltage drop: 200mV
Max input current: 20A (within 10 seconds)
Overload protection: 0.2A/250V resettable fuse , 20A measuring
range 15A/250V time-lag fuse.
Frequency response: (40 ～200)Hz.
Display: Sine wave RMS (Average value response).
E. Resistance( Ω )
Resolution
Range
200Ω 0.01Ω
2KΩ
0.1Ω
20KΩ 1Ω
10Ω
200KΩ
100Ω
2MΩ
[5.0%(Reading -
10KΩ
200MΩ
1000)+10]
Open circuit: less than 3V
Overload protection: 250V DC or AC effective value.
a. At range 200Ω , short-circuit the test leads to measure the wire
resistance, then subtracts it from the real measurement.
b. At range200MΩ , when the test leads short circuit, LCD display
1.0MΩ.It is normal and doesn't affect the accuracy. Please
deduct the value from the real measurement.
F. Capacitance (F)
Accuracy
Range Resolution
1pF
20nF
±(3.5%rdg+10dgt)
2uF
100pF
±(3.8%rdg+20dgt)
200uF
10nF
Testing frequency: 400Hz
Overload protection: 36V DC or AC effective value.
must refer to manual
low battery
.
"
Accuracy
Overload protection
1000V DC/
750V AC RMS
2
Overload
Accuracy
protection
(0.4%rdg+10dtg)
250V DC/AC
effective
(0.4%rdg+5dtg)
value
Overload protection
36V DC/AC
effective
value
4