REED CM-9930 Instruction Manual Download Page 7

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Display Description

Symbols/

Units

Descriptions

 

Appears when selecting DC modes

 

Appears when selecting AC modes

 

Appears when the data hold function is active

 

Appears when the relative function is active

 

Appears when battery voltage is low

 

Appears when the automatic range mode is active

 

Appears when the continuity beeper is active

mV, V

Units for voltage measurements

 

Ω, KΩ, MΩ Units for resistance measurements

 

Appears when the diode function is active

 

Appears when measuring negative DC values

 

Backlight is on

 %

Unit for duty cycle measurements

uA, mA, A

Units for current measurements

Hz, KHz 

Units for frequency measurements

nF, uF

Units for capacitance measurements

 

Appears when operating clamp-on current measurements

Summary of Contents for CM-9930

Page 1: ...reedinstruments www com Model CM 9930 True RMS AC DC Clamp Meter Instruction Manual...

Page 2: ...t 8 Continuity Check 8 Diode Test 8 9 AC Current Measurement Clamp on 9 DC Current Measurement Clamp on 9 AC Current Measurement Direct input 10 DC Current Measurement Direct input 10 Capacitance Meas...

Page 3: ...ways switch the function rotary switch to the OFF position when the instrument is not operation Remove the battery if the instrument will not be used for an extended period of time Even though the ohm...

Page 4: ...ers Specifications Display 15mm 0 6 4 digit LCD max indication 4000 Measurement Range AC DC ohms diode Hz capacitance duty cycle and continuity beeper Polarity Automatic Switching indicates negative p...

Page 5: ...Clamp on 400A 0 1A 2 5d AC DC 2000A 1000V 2000A 1A 2 8d Ohms 400 ohm 0 1 ohm 1 5d AC DC 400V 4K ohm 1 ohm 40K ohm 10 ohm 400K ohm 100 ohm 4M ohm 1K ohm 2 2d 40M ohm 10K ohm 3 5 5d Capacitance 50nF 10p...

Page 6: ...less than the 30MHz only The accuracy of the capacitance ranges are after the zero adjustment see page 11 has been executed Instrument Description 1 Clamp jaws 10 Manual range select button 2 Trigger...

Page 7: ...ars when the automatic range mode is active Appears when the continuity beeper is active mV V Units for voltage measurements K M Units for resistance measurements Appears when the diode function is ac...

Page 8: ...l now automatically select the suitable measurement range While in auto range mode press the range button to hold the range Continuity Check Connect the Black test lead into the COM terminal Connect t...

Page 9: ...r to open the current sensor jaws and clamp it around the measuring conductor only DC Current Measurement Clamp on Move the function rotary switch to the 2000A position and press the function button u...

Page 10: ...value more than 400mA otherwise the protection fuse will break When taking a direct input measurement and the meter shows a value of 0 check if the protection fuse is broken Capacitance Measurement No...

Page 11: ...tton and the displayed value will hold and will appear Press the hold button again to release the data hold function Relative Operation While taking a measurement the meter will store the last measure...

Page 12: ...replace the housing case Battery Replacement Caution Remove test leads before opening the battery cover 1 When the LCD display shows you will need to replace the battery 2 Loosen the screw on the batt...

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