Tenma 72-10420A, 72-7770A User Manual

1
Model: 72-7765A / 72-10420A / 72-7770A
Palm Size Digital Multimeter
2
Please read these instructions carefully before use and retain for future reference.
Check the test leads, probes and case insulation before using. If you nd any
When using the test probes, keep your ngers behind the nger protection ring.
Do not use the meter with the back cover open.
Select the appropriate test range for measurements.
Ensure all inputs are less than the range selected otherwise it may cause electrical shock or meter damage.
Do not change the range selector position during measurements.
Do not apply a voltage over 250V between COM terminal and ground.
Take caution when working voltages are above 60V DC or 30V AC rms.
Do not connect the meter to voltage signals when the range selector is on current, resistance, diode or continuity range.
When measuring current, each single measurement should be shorter than 10 seconds. For current values over 5A, the wait period between each measurement must be longer than 15 minutes.
When a measurement has been completed, disconnect the testing probes from the circuit under test.
Replace the batteries as soon as the low battery indicator appears on the display.
Remove dead batteries from the meter or if it is not going to be used for a long time.
Never mix old and new batteries together, or different types of batteries.
Never dispose of batteries in a re, or attempt to recharge ordinary batteries.
Before replacing the battery, turn off the meter and disconnect all the test probes.
To prolong battery life turn off the meter after use.
IMPORTANT SAFETY INFORMATION
WHAT’S INCLUDED
Digital palm size Multimeter.
Instruction manual.
Test leads.
ELECTRICAL SYMBOLS
AC or DC Low battery
AC Diode
DC Fuse
Ground Continuity sounder
Double insulation
3
FUNCTIONS
1. LCD display
2. Range button (72-7765A) (Press the yellow button to switch between AC and DC
current, or between continuity and diode measurements, indicated by buzzer. In
standby mode, press it to activate the meter and cancel auto power off function.)
3. HOLD button (72-10420A/72-7770A) (Press the yellow button, then the current
displayed data will be held with letter H shown on LCD. Press it again to exit data
hold operation.)
4. Backlight display button
(Press the blue button to turn on
backlight.)
5. Range selector.
6. COM input terminal.
7. 10A input terminal.
8. Other input terminal.
OPERATING PARAMETERS
Operating temperature: 23ºC ± 5ºC.
Relative humidity: <75%.
DC VOLTAGE
Model Range Resolution Accuracy Overload Protection
72-7765A
400mV 0.1mV ± (0.8%+3)
250V AC
4V 1mV
± (0.8%+1)
40V 10mV
250V 100mV
72-10420A
72-7770A
200mV 100μV
± (0.5%+2)
250V DC and AC
2000mV 1mV
20V 10mV
200V 100mV
250V 1V ± (0.8%+2)
Note:
Input impedance is 10MΩ.
4
DC CURRENT
AC VOLTAGE
Model Range Resolution Accuracy Overload Protection
72-7765A
4V 1mV
± (1.2%+3) 250VAC
40V 10mV
250V 100mV
72-10420A
72-7770A
200V 100mV
± (1.2%+10) 250V DC and AC
250V 1V
Notes:
Input impedance: ~ 5MΩ.
Displaying effective value of sine wave (mean value response).
Frequency response: 40 ~ 400Hz.
Note:
At 10A range: every measurement should be <10s, the interval between measurements must be > 15 minutes.
Model Range Resolution Accuracy Overload Protection
72-7765A
400μA 0.1μA
± (1%+2)
400mA/250V fast type
fuse Φ5x20mm
4000μA 1μA
40mA 10μA
± (1.2%+2)
400mA 100μA
4A 1mA
± (1.5%+5)
10A/600V fast type fuse
Φ6x25mm
10A 10mA
72-10420A
72-7770A
2000μA 0.1μA
± (0.5%+2)
200mA, 250V fast type
fuse Φ5x20mm
20mA 1μA
200mA 100μA ± (1.2%+2)
10A, 600V fast type
fuse Φ6x25mm
10A 10mA ± (2%+5)
Loading...
+ 8 hidden pages