Benning CM 9-2 - General Information

10/ 2019 BENNING CM 9-2
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
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ON/OFF key,switchestheBENNINGCM9-2on/off(2s),enablesthedis-
play illumination,
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HOLD/MAX-MINbutton,storageoftheindicatedmeasuredvalue,storage
ofthelowestorhighestmeasuredvalues(2s)
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RANGE button, switch-over to automatic/ manual measuring range selec-
tion
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Battery compartment cover, at the rear of the housing
5. General information
5.1 General information on digital current clamp meter
5.1.1 Thedigitaldisplay
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isdesignedasa4digitliquid-crystalindicatorwith
14mmdigitheightwithdecimalpoint.Thehighestvaluedisplayedis
6000.
5.1.2 Incaseofarangeexceedance(overflow),“0L.”isdisplayed.
 Attention:nodisplayorwarningbycompleteoverload.
5.1.3 TheBENNINGCM9-2canbeswitchedon/offbypressing(2s)thekey
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.Afterswitchingon,theremainingbatterycapacityisbrieflydisplayed
in%.Pressthekey
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againtoswitchthedisplayilluminationonoroff.
5.1.4 TheBluetooth
®
key
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hastwofunctions:
- Enables the Bluetooth
®
interfacewiththe“ “symbolbeingshown
ontheLCdisplay
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atthesametime.
 - Pressthekeyforapprox.2secondstoenablethemeasuringpoint
illumination.
5.1.5 TheLPFkey(low-passfilter)
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isusedforenablingvariousfiltersto
suppresshigh-frequencyinterferingsignals:
Low-pass filter (50 Hz to 60 Hz):
 Pressthekey once toenable a low-passfilter (50Hzto 60Hz)with
beingshownontheLCdisplay
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atthesametime.
 The low-pass filter(50 Hz to 60 Hz)) suppresses high-frequency in-
terferingsignals generatedby electricaldevices/installations withfre-
quencyconverters.Thelimitingfrequencyisapprox.200Hz.
Device filter (1 kHz):
 Pressthekeyagaintoenableadevicefilter(1kHz)with being
shownontheLCdisplay
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atthesametime.Thefrequencycharac-
teristics meet therequirements of EN 61557-16(VDE 0413-16) and
canbeusedtomeasureprotectiveconductorcurrentsanddifferential
currentsofelectricaldevices.Thelimitingfrequencyisapprox.1kHz.
5.1.6 TheHOLD key
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hastwofunctions:
 - The measuring result can be stored by pressing the HOLD key
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.The“HOLD”symbolsimultaneouslyappearsonthedisplay
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.
Pressthekeyagaintoswitchthedevicebacktomeasuringmode.
 - Pressingthekeyforapprox.2secondsenablestheMAX/MINfunc-
tionandautomaticallystoresthehighestandthelowestmeasured
value. By pressing the key again, the following values are dis-
played: “MAXMIN” displays the current measured value, “MAX”
displays the highest valuestored and “MIN” displays the lowest
valuestored.Pressthekeyforapprox.2secondstoswitchbackto
normaloperatingmode.
5.1.7 TheRANGE key
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canbeusedtochangeovertotheindividualman-
ualmeasuringranges(6mA,60mA,600mA,6A,60A)andtohide
“AUTO”onthedisplay
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atthesametime.Pressthekeyforapprox.
2secondstoselecttheautomaticrangeselection(“AUTO”isshownon
thedisplay).
5.1.8 ThemeasuringrateoftheBENNINGCM9-2amountsnominallyto5
measurementspersecondforthedigitaldisplay.
5.1.9 The BENNING CM 9-2 switches off automatically after approx. 20
minutes (APO, Auto-Power-Off is activated, if the symbol is
shownonthedisplay
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).ItswitchesonagainwhentheON/OFFkey
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ispressedfor 2 seconds.Automaticswitch-offcanbe deactivated
by pressing the LPF key
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 andby simultaneously switchingon the
BENNINGCM9-2.Thesymbol disappearsfromthedisplay
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.
5.1.10 TheBENNINGCM9-2issuppliedbytwo1.5Vbatteries(IECLR6/AA/
mignon).
5.1.11 Ifthebatteryvoltagedropsbelowthespecifiedoperatingvoltageofthe
BENNING CM 9-2, then a battery symbol appearsinthedisplay
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.
5.1.12 Thebatterylifeisapproximately60hourswithoutusingthemeasuring
point/displayilluminationandtheBluetooth
®
function.(alkalinebattery).
5.1.13 Temperaturecoefficientofthemeasuredvalue:0.1x(statedmeasuring
accuracy)/°C<18°Cor>28°C,relatedtothevalueforthereference
temperatureof23°C
5.1.14 Dimensionsofunit(lengthxwidthxheight)=230x100x46mm.