Tenma 72-7780 - Technical Specifications; Technical Specifications Overview

2） Placethedevicenearthemeasuredobject.
“‐“symbolindicatestheintensityoftheelectric
field.More“‐“andthehigherthebuzz erfrequency,
thehighertheelectricfieldintensity.
3） Intensityofelectricfield
*"EF":0~50mV
*"‐":50~100mV 
*"‐‐":100~150mV
*"‐‐‐":150~200mV
*"‐‐‐‐":>200mV
. Notes:
TestleadsarenotrequiredforNCVmeasurement.

10. Others
• Thedeviceentersmeasurementstatusin2secondsafterstartup.Restartthe
device,”ErrE”appears.
• Thedeviceautomaticallyshutsdownifthereisnooperationfor15minutes.
Youcanwak eupthedevicebypressinganykey.Todisableautoshutdown,
switchthedialtoOFFposition,longpressSELETEbuttonandturnonthedevice.
 symbolwilldisappearwithonelongbeep.Recovertheauto‐offfunctionby
restartingthedevice.
• Buzzernotification
1)Inputvoltage≥600V(AC/DC),buzzerwillcontinuouslybeepindicatingmeasure
rangeisatlimit
2)Inputcurrent>10A(AC/DC),buzzerwillcontinuouslybeepindicatingmeasure
rangeisatlimit
• Lowpowerwarnings:Voltageofthebattery<2.4V,symbolappears,the
devicecanstillbeused.Ifvoltageislowerthan2.2V,thedevicecannotworkand
thesymboldisappearsafterstartup.
• Thescreenbacklightcannotworkifbatteryvoltagelessthan2.6V.
X. Technicalspecification
Accuracy:±(%ofreading+numericalvalueinleastsignificantdigitslot),1Year
Warranty
Ambienttemperature:23˚C±5˚C(73.4˚F±9˚F)
Ambienthumidity:≤75%RH
1.DCvoltage
Range
Resoluti
on
Accuracy
60.00mV* 0.01mV
±(0.5%+2)
600.0mV** 0.1mV
6.000V 0.001V
±(0.7%+3)
60.00V 0.01V
600.0V 0.1V
600V 1V