Extech Instruments 407780A - Data Recording and Outputs; Preset Recording and Data Clearing

407780A‐EU‐ENv1.34/14
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7. Tosettherecordingfunctiontostartatapresettime;
a) PressandholdtheDATETIMEbuttonfor2secondstoenterthePRESETrecording
start‐timesettingmode,thePrEsymbolwillbedisplayed.
b) Aflashingcursorindicatesthecurrentlyselectedparameter(seconds),usethe
▲▼
buttonstosetthecurrentsecond.
c) PresstheDATETIMEbuttontomovetothenextparameter(minutes)anduse
the▲▼buttonstosetthecurrentminute.
d) Repeatstepc)tosetthecurrenthour,day,month,andyear.
e) PressDATETIMEtostorethestarttime,and
toexitthismode.
f) The ► and ‖symbolswillflashuntilthestarttimehasbeenreached.The► and ‖
symbolswillthenstopflashingandtheRECsymbolwillbeginflashing,indicatingthat
themeasurementsarebeingtakenandthatrecordinghasstarted.
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Clearingstoreddata
1. Pressthe buttontoswitchOFFthemeter.
2. PressandholdtheRECORDERASEbuttonandthenpressthe
buttontoswitchONthe
meter.
3. TheCLrsymbolwillappearonthedisplayindicatingthatthedatahavebeenerased.
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Analogoutputs
Theanalogoutputsprovideanalogsignalsproportionaltothemeasuredvaluesforrecorders
andotherdevices.Theoutputsrequirea3.5mmstereomini‐plug.
ACOutput:
AnACsignalcorrespondingtothefrequency‐weightedsignalisavailableatthisconnector.
Outputvoltage:2Vrms100mVrms(scaleupperlimit)
Outputimpedance:approx.5kΩ
Loadimpedance:≥1MΩ
Theoutputvoltagewhentheinstrumentisincalibrationmode(‐6dBfromscaleupperlimit,
1000Hzsinewave)is0.5Vrms.
DCOutput:
Alevel‐convertedDCsignalgeneratedbyRMSdetectionandlogarithmiccompressionis
availableatthisconnector.Thesignalreflectsthe frequencyandtime
weightingsettingsof the
instrument.
Outputvoltage:10mV0.1mV/dB
Outputimpedance:approx.5kΩ
Loadimpedance:≥1MΩ
Theoutputvoltagewhentheinstrumentisreading94dBisnominally0.94VDC.
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