Major tech MT873 Gebruiksaanwijzing - Pagina 2
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Capacitance
Range
Accuracy
9.999nF
±(3.0% of rdg + 10 digits)
99.99nF
±(2.5% of rdg + 5 digits)
999.9nF
9.999µF
99.99µF
±(5.0% of rdg + 10 digits)
999.9µF
9.999mF
±(10.0% of rdg + 20 digits)
99.99mF
* Overload protection: 600V DC or AC RMS
Frequency
Range
Accuracy
9.999Hz
99.99Hz
999.9Hz
± (0.1% of rdg + 5 digits)
9.999kHz
99.99kHz
999.9kHz
9.999MHz
* Sensitivity: sine wave 0.6V rms (9.999MHz: 1.5V RMS)
* Overload protection: 600V DC or AC RMS
Duty cycle
0.1%～99.9%: ± ( 2.0% of rdg + 2 digits ), Frequency lower than 10kHz
* Sensitivity: sine wave 0.6V RMS
* Overload protection: 600V DC or AC RMS
Temperature
Accuracy
Range
-20~150°C
°C
150~1000°C
± ( 3% of rdg + 2digits )
-4~302°F
°F
± ( 3% of rdg + 3digits )
302~1832 F °
* NiCr-NiSi Type-K sensor
* Overload protection: 600mA/600V Fast Fuse
Diode and Audible continuity test
Range
Description
Display read approximately
forward voltage of diode
Built-in buzzer sounds if
resistance is less than 50Ω
* Overload protection: 600V DC or AC RMS
Non Contact AC Voltage (NCV) detection
Test voltage range: 90V～1000V AC RMS
The NCV red light and green light will light up alternately together with sound
Operating Instructions
Attention before operation
1.
Check battery. When the battery voltage drops below proper operation r ange, the "
symbol will appear on the LCD display and the battery needs to be replaced.
2.
Pay attention to the "
.
" besides the input jack which shows that the i nput voltage or
current should be within the specified value.
3.
The range switch should be positioned to desired range for measurement b efore
operation.
Measuring DC & AC Voltage
1
.
Connect the black test lead to COM jack and the red to VΩmA jack.
2.
Set the rotary switch at the desired "V
DC voltage, if you want to test AC voltage, push "SELECT" button switch.
3.
Connect test leads across the source or load under measurement.
4.
You can get the voltage reading from LCD. The polarity of the red lead connection will
be indicated along with the DC voltage value.
Note:
1.
"
.
" means you can't input the voltage more than 600V, it's p ossible to s how higher
voltage, but it may damage the inner circuit or cause a shock.
2.
Be cautious against shock when measuring high Voltage.
Measuring DC & AC Current
1.
Connect the black test lead to COM jack and the red to the V ΩmA jack for a maximum
600mA current , for a maximum 6A or 10A current, move the red lead to the 10A jack.
2.
Set the rotary switch at the desired "uA
shows symbol for testing DC current, if you want to test AC current, push "SELECT"
button switch.
3.
Connect test leads in series with the load under measurement.
4.
You can get the amperage reading from LCD. The polarity of the red lead connection
will be indicated along with the DC current value.
Note:
1.
When the value scale to be measured is unknown beforehand, set t he range selector at
the highest position.
2.
When only "OL" is displayed, it indicates over-range situation and the higher range has
to be selected.
3.
"
.
" means the socket mA's maximum current is 600mA and 10A's maximum current is
10A, over 600mA or 10A current can be protected by the fast fuse.
4.
On the 10A range, the measuring time should be less than 10 seconds to prevent
precision from affecting by circuit heating.
Measuring Resistance
1
.
Connect the black test lead to COM jack and the red to VΩmA jack.
2.
Set the rotary switch at the desired "Ω
3.
Connect test leads across the resistance under measurement.
4.
You can get the resistance reading from LCD.
Resolution
1pF
10pF
100pF
1nF
10nF
100nF
1µF
10µF
Resolution
0.001Hz
0.01Hz
0.1Hz
1Hz
10Hz
100Hz
1kHz
Resolution
± ( 3
°C
+ 1digit )
1 °C
± ( 5
°F
+ 2digits )
1°F
Test Condition
Forward DC current
approx. 1.5mA
Reversed DC voltage
approx. 4V
Open circuit voltage
approx. 2V
.
" range position, it shows symbol for testing
.
" & "mA
.
" & "A
.
" range position, it
.
" range position.
Note
: Max. input overload: 600V rms＜10sec
1.
For measuring resistance above 1MΩ, the meter may take a few s econds to stabilize.
2.
When the input is not connected, i.e. at open circuit, the figure ' OL' will be displayed for
the over-range condition.
3.
When checking in-circuit resistance, be sure the circuit under test h as all power removed
and that all capacitors have been discharged fully.
Measuring Capacitance
1.
Connect the black test lead to COM jack and the red to VΩmA
jack.
2.
Set the rotary switch at the desired "Ω
3.
Connect test leads across the capacitance under measurement.
4.
You can get the capacitance reading from LCD.
Note
: Max. input overload: 600V rms＜10sec
1.
Capacitors should be discharged before being tested.
2.
When testing large capacitance, it will take longer time before the f inal value is
measured (For 100uF~99.99mF range, it will take about 10 seconds).
3.
When testing small capacitance (≤1uF), to assure the measurement accuracy, first press
"REL", then go on measuring.
Measuring Frequency & Duty cycle
1.
Connect the black test lead to COM jack and the red to VΩmA jack.
2.
Set the rotary switch at the desired "Hz" range position.
3.
Push "Hz/%" key to choose Frequency or Duty cycle test.
4.
Connect the probe across the source or load under measurement.
5.
You can get the frequency reading from LCD.
Measuring Temperature
1.
Connect the black banana plug of the sensor to COM jack and the r ed banana plug to
the VΩmA jack.
2.
Set the rotary switch at the desired °C/°F range position, push "SELECT" to choose °C
°F or measurement.
3.
Put the sensor probe into the temperature field under measurement.
4.
You can get the temperature reading from LCD.
Note:
1.
The accessory of the meter type contact thermocouple limited temperature is 250°C,
please use special probe for testing higher temperature.
2.
Please don't change the thermocouple at will, otherwise we can't guarantee to measure
accuracy.
3.
Please don't measure voltage in the temperature function.
Diode & Audible continuity Testing
1.
Connect the black test lead to COM jack and the red to VΩmA jack.
2.
Set the rotary switch at the "Ω
or Audible continuity measurement.
3.
On diode range, connect the test leads across the diode under measurement, display
shows the approx. forward bias voltage of this diode.
4.
On Audible continuity range, connect the test leads to two point of circuit, if the
resistance is lower than approx. 50Ω, the buzzer sounds.
Note:
Make sure the power is removed and all capacitors need to be discharged under this
measurement.
Non-Contact AC Voltage detection
1.
Set the rotary switch at the desired "NCV" range position, the NCV green LED light will
light up.
2.
Hold the Meter so that the meter's top is vertically and horizontally centred with the
conductor, when the live voltage ≥ 90V AC rms, the NCV red LED light and green LED
light will light up alternately together with sound.
Note:
1.
Even without LED indication, the voltage may still exist. Do not rely on non-contact
voltage detector to determine the presence of voltage wire. Detection operation may be
subject to socket design, insulation thickness and different type and other factors.
2.
When the meter measures voltage, due to the influence of presence of voltage, the
voltage sensing indicator may also light up.
3.
Keep the meter away from electrical noise sources during the tests, i.e., florescent lights,
dimmable lights, motors, etc.. These sources can trigger Non-Contact AC Voltage
detection function and invalidate the test.
Battery replacement
1.
When the battery voltage drops below proper operation range the "
"
appear on the LCD display and the battery needs to be replaced.
2.
Before replacing the battery, set the selector switch to "OFF" position and remove the
test leads from the terminals. Open the cover of the battery cabinet with a suitable
screwdriver.
3.
Replace the old battery with the same type battery (9V 6F22).
4.
Close the cover of the battery cabinet and fasten the screw.
Fuse replacement
1.
This meter is provided with a 600mA/600V fast fuse to protect the battery test,
temperature test and the current measuring circuits which measure up to 600mA, with a
10A/600V fuse to protect the 10A range.
2.
Ensure the meter is not connected to any external circuit, set the selector switch to
"OFF" position and remove the test leads from the terminals. Open the cover of the
battery cabinet with a suitable screwdriver.
3.
Replace the old fuse with the same type and rating: 6×32mm 600mA/600V fast fuse or
6×32mm 10A/600V fast fuse.
4.
Close the cover of the battery cabinet and fasten the screw.
Maintenance
1.
You must replace the test leads if the insulation is broken and the internal wire exposed.
exposed, use the same test leads with the same specifications same specifications.
2.
Use only moist fabric or small amount of detergent but not chemical solution for
cleaning.
3.
Do not use the meter before the back cover is properly closed and screw secured. Upon
any sign of damage, stop operation immediately and send the meter for maintenance.
4.
Please take out the battery when not using for a long time.
Accessories
1.
Test Leads: electric rating 600V 10A. If the test leads need to be replaced, you must use
a new one which should meet EN 61010-031 standard, rated CATIII 600V, 10A or better.
2.
"K" type thermocouple sensor probe
3.
Operator's Manual
MAJOR TECH
South Africa
www.major-tech.com
.
" range position.
.
" range position, push "SELECT" to choose Diode
.
"symbol will
(PTY) LTD
Australia
www.majortech.com.au