OPERATING INSTRUCTIONS
MODEL 2707B
DIGITAL MULTIMETER
2707B
V
A A
F
mA
COM
10A
SAFETY INFORMATION
The following safety information must be observedtoensure maximum personal
safetyduring the operationatthismeter:
Use the meteronlyasspecified in this manualor the protection providedbythe
metermightbeimpaired.
Test the meteron a knownvoltage before usingit to determineifhazardous
voltage is present.
Do not use the meter if the meteror test leadslookdamaged, or if you suspect
that themeteris notoperating properly.
Neverground yourselfwhentaking electricalmeasurements. Do nottouch
exposed metal pipes, outlets, fixtures,etc., which might be at groundpotential.
Keepyourbody isolated from groundbyusing dry clothing, rubber shoes,rubber
mats,oranyapproved insulating material.
Turnoff power to the circuit undertestbefore cutting, unsoldering,orbreaking
the circuit.Small amountsofcurrent can be dangerous.
Use cautionwhen workingabove60Vdc or 30V ac rms. Suchvoltages posea
shockhazard.
When Usingtheprobes, keep your fingers behind the finger guardsonthe
probes.
Measuring voltagewhich exceeds the limitsofthemultimeter may damagethe
meterandexpose the operatorto a shock hazard. Alwaysrecognize the meter
voltage limits as statedonthe frontofthemeter.
99 Washington Street
Melrose, MA 02176
Phone 781-665-1400
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com
Back to the BK 2707B Product Info Page
V
VHz
SPECIFICATIONS
Display: 3½ digitliquid crystaldisplay (LCD) with a maximum reading of 1999.
Polarity:Automatic, positiveimplied, negative polarityindication.
Overrange: (OL) or (-OL) is displayed.
Zero:Automatic.
Lowbattery indication:The
belowthe operating level.
Measurement rate: 2.5 timespersecond, nominal.
Operating environment: 0℃ to 50℃at< 70% relative humidity.
Storage temperature: -20℃ to 60℃,0 to 80% relativehumidity.
Accuracy: Statedaccuracyat 23℃±5℃, < 75%relative humidity.
Temperature Coefficient: 0.1 x (specifiedaccuracy)per ℃. (℃ to 18℃, 28℃ to
50℃).
Altitude: 6561.7 feet (2000m).
Power: Single standard 9-volt battery, NEDA1604, JIS 006P, IEC 6F22.
Battery life: 150 hours typicalwith carbon-zinc.
Dimensions: 165mm(H) x78mm(W)x42.5mm (D).
Weight: Approx. 10.0 oz.(285g) including holster.
Accessories: One set test leads,one spare fuse, 9V battery(installed),and
Operating Instructions.
is displayed when the batteryvoltage drops
" "
DC VOLTS
Ranges: 200mV,2V,20V, 200V, 1000V
Resolution: 0.1mV
Accuracy: ± (0.8%rdg+ 1 dgt)
Inputimpedance: 10MΩ
Overload protection: 1000VDCor 750VACrms
600VDC/AC rms 15 seconds on 200mV range
AC VOLTS(TRUERMS)(50Hz - 500Hz)
Ranges: 200mV,2V,20V, 200V, 750V
Resolution: 0.1mV
Accuracy:
±( 1.5% rdg + 8 dgts) on 200mV to 20V ranges
±( 2.0% rdg + 8 dgts) on 200V,750V ranges
Crestfactor: ≤3
Inputimpedance: 10MΩ
Overload protection: 1000VDCor 750VACrms
600VDC/AC rms 15 seconds on 200mV range
CURRENT
DC Ranges: 20mA, 200mA,10A
DC Resolution: 10uA
DC Accuracy:
±( 1.0% rdg + 1 dgt)on20mAto 200mAranges
±( 3.0% rdg + 3 dgts)on 10Arange
DC Input protection: 0.5A/500V fastblowceramic fuse
AC Ranges: 20mA, 200mA,10A(TRUE RMS)(50Hz~ 500Hz)
AC Resolution: 10uA
AC Accuracy:
±( 2.0% rdg + 8dgts)on 20mAto 200mAranges
±( 3.5% rdg+ 8 dgts) on 10Arange
DC Input protection: 0.5A/500V fastblowceramic fuse
10A/600V fast blow ceramicfuse
10AAC & DC Input: 10Afor 60 seconds maximum followed
by a 10 minute coolingperiod
10A/600V fast blow ceramicfuse
RESISTANCE
Ranges: 200Ω, 2kΩ, 200kΩ, 20MΩ, 2000MΩ
Resolution: 0.1Ω
Accuracy:
±( 1.0% rdg + 4 dgts) on 200Ωto 200kΩranges
±( 2.0% rdg + 4 dgts) on 20MΩrange
±[(5.0%rdg - 10 dgts) +10dgts] on 2000MΩrange
Open circuit volts: 0.3Vdc typical,(3.0Vdc on 200Ω,2000MΩranges)
Overload protection: 500VDC or AC rms
CONTINUITY
Audible indication: Less than 100Ω
Response time: 100ms
Overload protection: 500VDC or AC rms
DIODE TEST
Test current: Approx. 1.0mA
Accuracy: ±(1.5% rdg + 3dgts)
Open circuit volts: 3.0Vdc typical
Overload protection: 500VDC or AC rms
CAPACITANCE
Ranges: 2nF,20nF, 200nF, 2uF, 20uF
Resolution: 1PF
Accuracy: ±(4%rdg+ 10 dgts)
Discharge capacitor before connecting
TRANSISTOR hFE
Range: 0 ~ 1000
Base current: 10uAdc approx. (Vdc = 3.0Vdc)
FREQUENCY (Autoranging)
Ranges: 2kHz, 20kHz,200kHz, 2MHz,20MHz
Resolution: 1Hz
Accuracy: ±(0.1% rdg + 3 dgts)
Sensitivity:2.0V RMS min
Minimumpluse width: 25ns
Dutycycle limits: >30% and <70%
Overload protection: 500VDC or AC rms
LOGIC TEST
Threshold:Logic Hi (2.8±0.8V)
LogicLo(0.8±0.5V)
Indication:40 msec beep at logic low
Overload protection: 500VDC or AC rms
OPERATION
Beforetaking any measurements, readtheSafety InformationSection.Always
examine the instrumentfordamage, contamination (excessive dirt, grease,etc.)
and defects. Examine the test leadsforcracked or frayed insulation. If any
abnormal conditionsexist do not attempt to make any measurements.
Input Warning Beeper
The meterhasa beeperthatwarns the user when the test leadis in the current
jack whilethe meteris switched to make a voltagemeasurement.Anothersafety
feature to protect the meter and you.
Data Hold
Press[HOLD] button to lock the readingon display,andrelease it by pressing
the buttonagain.
MAX/MIN
PressMAX/MINonce begin recordingMINandMAX.
PressMAX/MINto selectcurrent readingMIN or MAX.
Hold downfor2 secondstoexitMAX/MIN function.
Voltage Measurements
1.Connect the red test lead to ”VΩ”jack andthe blacktestlead to the ”COM”
jack.
2.SettheFunction/Range switch to the desiredvoltage type (AC or DC) and
range. If magnitude of voltageis not known, setswitch to thehighest range
and reduceuntil a satisfactoryreading is obtained.
3.Connect the test leads to the deviceor circuitbeing measured.
4. For dc, a (-) sign is displayed for negativepolarity; positive polarity is implied.
CurrentMeasurements
1.Connect the red test leadtothe( mAor10A)jack and the black test leadto the
“COM”jack.
2.SettheFunction/Range switch to the DC or AC ranges.
3.Remove power from the circuitunder test and open the normal circuitpath
wherethe measurement is to be taken. Connect the meter in series with the
circuit.
4.Apply power and readthe valuefromthedisplay.
Resistance and Continuity Measurements
1.SettheFunction/Range switch to the desiredresistance rangeorcontinuity
position.
2.Remove power from the equipment under test.
3.Connect the red test lead to the “ VΩ” jackandtheblack test lead to
the ”COM” jack.
4.Touch the probes to the test points.In ohms,thevalue indicatedinthe display
is the measuredvalue of resistance. In continuity test,thebeeper sounds
continuously, if the resistanceislessthan 100Ω.
Note when using 2000MΩ Range
The 2000MΩrangehas a fixed10-count offsetin the reading. When the test
leadsareshorted togetherinthisrange, the meter will display010.This residual
reading must be subtracted fromthereading. For example,whenmeasuring
1100MΩon the 2000MΩrange, the displaywill read 1100,from which the 10
residual is subtractedto obtainthe actual resistance of 1100MΩ.
Diode Tests
1.Connect the red test lead to the “ VΩ” jackandtheblacktest leadto
the ”COM” jack.
2.SettheFunction/Range switch to the““ position.
3.Turn off powerto the circuitunder test.
4.Touch probes to the diode.A forward-voltagedrop is about 0.6V (typical for a
silicondiode).
5.Reverse probes.If the diodeis good, “OL”is displayed. If the diode is shorted,
“000”or another number is displayed.
6. If the diode is open, “OL” is displayed in bothdirections.
Capacitance Measurements
1.SettheFunction/Range switch to the desiredF (capacitance)range.
2.Never apply an externalvoltage to the Cx sockets.
Damagetothemeterrnay result.
3.Insert the capacitordirectly into the Cx sockets.
4.Read the capacitance directly from the display.
Transistor hFE Measurements
1.SettheFunction/Range switch to the desiredhFE range(PNP or NPN type
transistor).
2.Never applyanexternal voltagetothe hFE sockets.
Damageto themetermay result.
3.Plugthetransistor directly into the hFE sockets.The sockets are labeled E, B,
and C for emitter, base, and collector.
4.Read the transistorhFE directly from the display.
Frequency Measurements
1.SettheFunction/Range switch to the ”Hz” position.
2.Connect the red test lead to the “VΩ” jack and the black test lead to the ”COM”
jack.
3.Connect the test leads to the point of measurement and read the frequency
fromthe display.
Logic Measurements
1.SettheFunction/Range switch to the “LOGIC” position.
2.Connect the red test lead to “VΩ” jack and the black test leadto the ”COM”
jack.
3.Connect the red test lead to the test point and the black leadto the common
buss of the logic circuit.
4.A “▲” on the display indicates TTL logic high and a “▼”indicates a TTL logic
low. Both indicators areonwhenthe point of measurement is toggling high
and low.
MAINTENANCE
Removetest leads before changing battery or fuse or
performing any servicing.
WARNING
Battery Replacement
Poweris supplied by a 9 volt battery. (NEDA1604, IEC 6F22).The
on the LCD displaywhen replacementis needed. Toreplace the battery, remove
the threescrews from the back of the meter and lift offthe front case. Remove
the battery from case bottom.
" "
appears
Fuse Replacement
If no currentmeasurementsarepossible. Checkfora blownoverload protection
fuse.Foraccess to fuses, remove the threescrews from the back of the meter
and liftoffthefront case.Replace F1 only with the originaltype 0.5A/500V, fast
actingceramic fuse 6.35x32mm.
Replace F2 onlywith the original type10A/600V, fast acting ceramicfuse,
6.35x25.4mm.
Cleaning
Wipe the casewitha dampclothandmild detergent. Do not use abrasivesor
solvents. Dirt or moisturein the terminals can affect readings.
Safety: Conforms to IEC61010-1 (EN61010-1), CATII 1000V, CATIII600V, Class
II, Pollution degree2 Indooruse.
CATII: Is formeasurementsperformed on circuitsdirectly connectedtothe
low-voltageinstallation.
CAT III: Is for measurements performedinthebuilding installation.
EMC:Conforms to EN61326.
The symbolsused on this instrumentare:
Caution, refer to accompanying documents
Equipment protectedthroughout by Double insulation (Class II)
Alternating current
Directcurrent
Ground
Loading...