Veto DF68D Manual de usuario
User's Guide
Mini Clamp Multimeters
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Mini Clamp Multimeter DF68D
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User's Guide of Mini Clamp Multimeters DF68A/DF68D
CONTENTS
1 Summary.........................................................................13
2 Safety instruction.............................................................13
2-1. Safety signs.............................................................13
2-2. Notes.......................................................................13
3 Feature............................................................................14
3-1. General feature........................................................14
3-2. Technical feature.....................................................15
4 Operating instruction.......................................................19
4-1. AC /DC measurement..............................................19
4-2. DCV measurement..................................................20
4-3. ACV measurement..................................................20
4-4. Resistance measurement........................................20
4-5. Interrupted circuit and diode measurement..............21
4-6. Temperature measurement.....................................21
4-7. Frequency, Duty cycle measurement......................22
4-8. Capacitance measurement......................................22
4-9. Automatic shutdown................................................22
4-10. Back light...............................................................22
5. Maintenance..................................................................23
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User's Guide of Mini Clamp Multimeters DF68A/DF68D
1 SUMMARY
DF68D is 3 3/4 handheld digital clamp multimeter, and has the
ability to measure DC, AC, DCV/ACV, resistance, capacitance,
temperature, frequency, Duty cycle, Diode and interrupted circuit.
And it is suitable for lab, eld measurement, household and large
current measurement.
2 SAFETY INSTRUCTION
This instrument follows the IEC1010-I (EN61010-I) pollution2,
CAT.600V and UL3111-1 safety standards. Please read the manual
carefully before use.
2-1. Safety signs
Cautions! Please refer to the manual before use
Cautions! Electric shock!
Double insulation
Power insufcient
2-2. Notes
2-2-1. please read the manual carefully before use, and operates
the multimeter following the instruction strictly, in order to
avoid damaging the personal safety and the multimeter.
2-2-2. please disconnect the probes and input signal before opening
the outer layer, in order to avoid electric shock or damaging
the multimeter, and keep the multimeter away the water.
2-2-3. please don’t use the multimeter before fixing the layer or
tightening the screw.
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User's Guide of Mini Clamp Multimeters DF68A/DF68D
2-2-4. doesn’t exceed the limited value during measurement.
2-2-5. it is prohibited to connect the voltage in the resistance range
terminals.
2-2-6. please removes the battery if keep the multimeter for a
long time, in case the battery leakage damages the inner
components.
2-2-7. it will cause serious electric shock if the DCV>36V or
ACV>25V.
2-2-8. it should be especially careful when clamping the uninsulated
conductor or maternal lines, to avoid electric shock by
contacting the conductor accidentally.
3 FEATURE
3-1. General feature
3-1-1. Display: LCD display
3-1-2. Maximum display: 3 3/4 (3999 character) automatically
polarity display
3-1-3. over range display: maximum display”OL”
3-1-4. V, Ω, CAP automatic range (some current range is manual
range)
3-1-5. Data hold function
3-1-6. Sampling speed: 3 times/second
3-1-7. low battery display
3-1-8. Manual back light
3-1-9. Continuity Buzzer measurement: <(50±)Ω buzzer ringing
3-1-10. Automatic shutdown (about 30mins)
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User's Guide of Mini Clamp Multimeters DF68A/DF68D
3-1-11. Power: 2X 1.5V AAA battery
3-1-12. Jaw opening size: 28mm, cable 26mm
3-1-13. Multimeter operating current: <2mA (no back light)
3-1-14. Operating environment: 0°C~40°C, Relative humidity: <
70% RH
3-1-15. Storage environment: -10°C~60°C, Relative humidity: <
80% RH
3-1-16. Volume: 185mm*51mm*25mm
3-1-17. Weight: about 160g
3-1-18. Attachment: operating manual:1, probe:1, 1.5V AAA
battery:2
3-2. Technical feature
3-2-1. Function (the multimeter has the function with the sign ”▲”)
DF68D
DCV ▲
ACV ▲
DC ▲
AC ▲
Resistance/interrupted circuit ▲
Capacitance ▲
Temperature ▲
Frequency ▲
3-2-2. Accuracy: ±(a% reading+number), guarantee the accuracy
and the environment temperature (23±5°C); Relative
humidity<70%
3-2-3. Temperature coefcient: 0.1×Specied accuracy/1°C(<18°C
or >28°C)
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User's Guide of Mini Clamp Multimeters DF68A/DF68D
3-2-4. AC
Range Accuracy Resolution
40A ±(3%+5) 10mA
400A 100mA
600A ±(3%+8) 1A
Caution: The current measurement should be done between
0°C and 40°C. At AC stall, it may be display 10 unstable words or
ncorrect reading, and it will not effect the results.
Press and hold the trigger and don't release it suddenly. The clamp
head buit-in Hall element is a sensitive device, except for sensitive
for magnetism, it has different degrees of sensitivity for thermal and
mechanical stress. It will cause reading changing in a short time
when hitting the multimeter.
Overload Protection: maximum input: 600A, and the time <1 min
Frequency response: 50Hz-60Hz
3-2-5. DC
Range Accuracy Resolution
20A ±(2.5%+5) 0.01A
400A ±(2.5%+8) 0.1A
Caution: The current measurement should be done between 0°C
and 40°C. During DC measurement, if the reading is positive, the
current direction is from bottom to top. (the panel is top,and the
bottom cover is bottom)
The clamp head buit-in Hall element is a sensitive device, except
for sensitive for magnetism, it has different degrees of sensitivity for
thermal and mechanical stress. It will cause reading changing in a
short time when hitting the multimeter.
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User's Guide of Mini Clamp Multimeters DF68A/DF68D
3-2-6. ACV
Range Accuracy Resolution
4V
±(1.5%+5)
1mV
40V 10mV
400V 100mV
600V 1V
Input impedance: 10MΩ
Frequency response: 50Hz-400Hz
Overload Protection: 600V DC/AC
3-2-7. DCV
Range Accuracy Resolution
400mV
±(0.8%+3)
100μV
4V 1mV
40V 10mV
400V 100mV
600V ±(1.0%+3) 1V
Input impedance: 10MΩ
Overload Protection: 600V DC/AC
3-2-8. Resistance
Range Accuracy Resolution
400Ω ±(1.2%+3) 0.1Ω
4KΩ
±(1.0%+3)
1Ω
40KΩ 10Ω
400KΩ 100Ω
4MΩ 1KΩ
40MΩ ±(1.5%+3) 10KΩ
Overload Protection: AC250V
Caution: prohibit inputting voltage in this range!!!
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User's Guide of Mini Clamp Multimeters DF68A/DF68D
3-2-9. Capacitance
Range Accuracy Resolution
40.00nF ±(3%+18) 10pF
400.0nF
±(1.0%+3)
100pF
4.000μF 1nF
40.0μF 10nF
100μF 100nF
Overload Protection: AC250V
Caution: prohibit inputting voltage in this range!!!
3-2-10. Temperature
Range Accuracy Resolution
0°C-400°C ±(1.0%+3) 1°C
Caution: prohibit inputting voltage in this range!!!
3-2-11. Diode/ Interrupted circuit
Range Display Test condition
positive PN pressure
drop value
Voltage of open-circuit is
about 1.5V
Interrupted circuit
The resistance of two
tested points is <(50±5)
Ω, and the buzzer is
ringing
Cautions: the buzzer is ringing or not if the resistance is between
50-100Ω, and the buzzer will not ring if it is >100Ω.
Overload Protection: AC250V
Caution: prohibit inputting voltage in this range!!!
3-2-12. Frequency
Range Accuracy Resolution
10Hz ±(0.8%+3) 0.01Hz
100Hz 0.1Hz
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User's Guide of Mini Clamp Multimeters DF68A/DF68D
1KHz
±(0.8%+3)
1Hz
10KHz 10Hz
100KHz 100Hz
1MHz 1KHz
10MHz Only for reference 10KHz
Sensitivity: ≤100KHz: ≥300mV rms
>100KHz: ≥600mV rms
≤1MHz: ≥800mV rms
Overload Protection: AC250V
3-2-13. Duty cycle (Duty%)
Range Accuracy Resolution
0.1%-99.9% Only for reference 0.1%
Overload Protection: AC250V
4 OPERATING INSTRUCTION
4-1. AC /DC measurement
4-1-1. Set the function switch to the ACA /DCA range.
4-1-2. Open the jaw and hold one wire, and in order to obtain the
accurate reading, the wire is suggested to locate to the
middle of the closed jaw.
Caution:
1. Please do not input the current exceeding the limited value,
otherwise the multimeter will be damaged.
2. DC measurement: Pre-set to zero (Press REL button)
On 400/600A stall, use the zeroing button and go into the 400A
fixed range. If measuring the current higher than 400A , it
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