Itm 2708B Operating Instructions

OPERATING INSTRUCTIONS
MODEL 2708B
DIGITAL MULTIMETER
A mA
10A
SAFETY INFORMATION
The following safety information must be observed to ensure maximum personal
safety during the operation at this meter:
Use the meter only as specified in this manual or the protection provided by the
meter might be impaired.
Test the meter on a known voltage before using it to determine if hazardous
voltage is present.
Do not use the meter if the meter or test leads look damaged, or if you suspect
that the meter is not operating properly.
Never ground yourself when taking electrical measurements. Do not touch
exposed metal pipes, outlets, fixtures, etc., which might be at ground potential.
Keep your body isolated from ground by using dry clothing, rubber shoes, rubber
mats, or any approved insulating material.
Turn off power to the circuit under test before cutting, unsoldering, or breaking
the circuit. Small amounts of current can be dangerous.
Use caution when working above 60V dc or 30V ac rms. Such voltages pose a
shock hazard.
When using the probes, keep your fingers behind the finger guards on the
probes.
Measuring voltage which exceeds the limits of the multimeter may damage the
meter and expose the operator to a shock hazard. Always recognize the meter
voltage limits as stated on the front of the meter.
1.800.561.8187
2708B
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SPECIFICATIONS
Display: 3¾ digit liquid crystal display (LCD) with a maximum reading of 3400.
Analog bar graph: 34 segments with measurements 12 times per second.
Polarity: Automatic, positive implied, negative polarity indication.
Overrange: (OL) or (-OL) is displayed.
Zero: Automatic.
Low battery indication: The "
below the operating level.
Measurement rate: 2 times per second, nominal.
Auto power off: Approx. 10 minutes.
Operating environment: 0℃ to 50℃at < 70% relative humidity.
Storage temperature: -20℃ to 60℃, 0 to 80% relative humidity.
Accuracy: Stated accuracy at 23 ℃ ±5℃, < 75% relative humidity.
Temperature Coefficient: 0.1 x (specified accuracy) per ℃. (℃ to 18℃, 28℃ to
50℃).
Altitude: 6561.5 feet (2000m).
Power: Single standard 9-volt battery, NEDA 1604, JIS 006P, IEC 6F22.
Battery life: 150 hours typical with carbon-zinc.
Dimensions: 165mm (H) x78mm (W) x42.5mm (D).
Weight: Approx. 10.0oz.(285g) including holster.
Accessories: One set test leads, one spare fuse, 9V battery (installed), and
Operating Instructions.
DC VOLTS
Ranges: 340mV, 3.4V, 34V, 340V, 1000V
Resolution: 0.1mV
Accuracy: ± ( 1 . 0 % r d g + 2 d g t s )
Input impedance: 340mV: >100MΩ ; 3.4V:10MΩ ; 34V ~1000V:9.1MΩ
Overload protection: 1000VDC or 750VAC rms
AC VOLTS
(TRUE RMS) (50Hz – 1kHz)
Ranges: 3. 4V, 34V, 340V, 750V
Resolution: 1mV
Accuracy: ± ( 2.0% rdg + 8 dgts) 50 ~ 1kHz on 3.4V, 34V ranges
± ( 2.0% rdg + 8 dgts) 50 ~ 500Hz on 340V, 600V ranges
Input impedance: 3.4V: >10MΩ ; 34V ~ 750V:9.1MΩ
Overload protection: 1000VDC or 750VAC rms
CURRENT
Ranges: 340uA, 3400uA, 34mA, 340mA, 10A
Crestfactor:≤3
Resolution: 0.1uA
DC accuracy:
± ( 2.0% rdg + 2 dgts) on 340uA to 340mA ranges
± ( 3.0% rdg + 3 dgts) on 10A range
AC accuracy:
(TRUE RMS) (50Hz ~ 500Hz)
± ( 2.5% rdg + 10 dgts) on 340uA to 340mA ranges
± ( 3.5% rdg + 10 dgts) on 10A range
Voltage burden: 0.2V on 340uA, 34mA, 10A ranges
2V on 3400uA, 340mA ranges
Input protection: 0.5A/500V fast blow ceramic fuse
10A/600V fast blow ceramic fuse
10A Input: 10A for 60 seconds maximum followed
by a 10 minute cooling period
RESISTANCE
Ranges: 340Ω , 3.4kΩ , 34kΩ , 340kΩ , 3.4MΩ , 34MΩ
Resolution: 0.1Ω
Crestfactor:≤3
Accuracy:
±(1.5% rdg + 4 dgts) on 340Ωto 340kΩ ranges
±(2.5% rdg +4 dgts) on 3.4MΩrange
±(5.0% rdg + 5 dgts) on 34MΩrange
Open circuit volts typical: -0.45Vdc (-1.2Vdc on 340Ωrange)
Overload protection: 500VDC or AC rms
DIODE TEST
Test current: 1.0mA (approximate)
Accuracy: ±(3.0% rdg + 3 dgts)
Resolution: 10mV
Audible indication: <0.25V
Open circuit volts: 3.0Vdc typical
Overload protection: 500VDC or AC rms
CONTINUITY
Audible indication: Less than 35Ω
Response time: 500ms
Overload protection: 500VDC or AC rms
OPERATION
Before taking any measurements, read the Safety Information Section. Always
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examine the instrument for damage, contamination (excessive dirt, grease, etc.)
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" is displayed when the battery voltage drops