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Summary of Contents for REED CM-9930
- Page 1 CM-9930 Model True RMS AC/DC Clamp Meter Instruction Manual reedinstruments...
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Page 2: Table Of Contents
Table of Contents Safety .................... 3 Features ..................4 Specifications ................4-6 Instrument Description ...............6-7 Operating Instructions ..............8-11 DC/AC Measurements ..............8 Resistance Measurement ............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) ........ -
Page 3: Safety
Safety To ensure safe operation and service of this meter, follow these instructions: • Ensure that the DC 9V battery is connected to its snap terminal with the right polarity and correctly placed in the battery compartment • Place the Red and Black test leads into the proper input terminal before taking any measurements •... -
Page 4: Features
Features • 2 in 1, 2000A clamp meter and digital multimeter • LSI circuit provides high reliability and durability • Overload protection circuit is provided for all ranges • Compact & heavy duty ABS and fireproof plastic case • Installation category III • Pollution degree 2 • Altitude up to 2000 meters 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 polarity Current Sensor: Hall effect sensor Zero adjustment: DC: Push button adjustment Other ranges: Automatic adjustment Over-input: Indication of “1” or “-1” Sampling Time: Approximately 0.35 seconds Operating Temp: 0°C to 50°C (32°F to 122°F) Operating Humidity: Less than 80% RH Max. Jaw Open Size: 60mm (2.36”) diameter Weight: 380g/0.85lb (including battery) -
Page 5: Electrical Specifications
Electrical Specifications Overload Function Range Resolution Accuracy Protection DC/AC 400mV 0.1mV ± (0.5% + 2d) AC/DC 1000V Voltage 0.001V (DC only) ± (1% + 2d) 0.01V 400V 0.1V ± (1.2% + 5d) 1000V DC/AC 400uA 0.1uA ± (1.2% + 5d) AC/DC 500mA Current 4000uA... -
Page 6: Instrument Description
Notes: • True RMS measurement for AC measurements • Input impedance for AC/DC range is 10M ohm • AC frequency response is from 45 to 1KHz • AC specification is tested on sine wave 50/60Hz • Specifications are tested under the environment RF Field Strength less than 3V/M and frequency less than the 30MHz only •... - Page 7 Display Description Symbols/ Descriptions Units 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...
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Page 8: Operating Instructions
Operating Instructions DC/AC Measurements Connect the Black test lead into the COM terminal. Connect the Red test lead into the V terminal. If measuring DC, move the function rotary switch to the V position and press the function button until the display shows . -
Page 9: Ac Current Measurement (Clamp-On)
b) When connected as shown in Fig. 2, a reverse check on the diode is made. If the diode under test is good a 1 will show on the display. If the diode under test is defective, .000 or other numbers will be displayed. -
Page 10: Ac Current Measurement (Direct Input)
AC Current Measurement (Direct input) Connect the Black test lead into the COM terminal. Connect the Red test lead into the uA, mA terminal. If measuring uA (400uA, 4000uA), move the function rotary switch to the uA position and press the function button until the display shows If measuring mA (40mA, 400mA), move the function rotary switch to the mA position and press the function button until the display shows... -
Page 11: Duty Cycle Measurement
Duty Cycle Measurement All the measuring procedures are same as a frequency measurement except press the Hz/% until the display shows %. Zero Adjustment Open the input terminal and the capacitor that is not connected and press the relative button until the display shows a value of zero. Connect the measuring capacitor again and take your measurement. -
Page 12: Fuse And Battery Replacement
Fuse and Battery Replacement Fuse Replacement 1) The meter is provided with one 5 x 20mm 500mA fuse for current (direct input) measurements and current range overload protection purposes 2) When the direct input current range isn’t operating check to see if the fuse is broken 3) To replace the fuse, open the housing case and remove the fuse from the main PC board... - Page 13 Notes __________________________________________ ________________________________________________ ________________________________________________ ________________________________________________ ________________________________________________ ________________________________________________ ________________________________________________ ________________________________________________ ________________________________________________ ________________________________________________ ________________________________________________ ________________________________________________ ________________________________________________ ________________________________________________ ________________________________________________ ________________________________________________ ________________________________________________ ________________________________________________ reedinstruments...
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- Page 16 Notes __________________________________________ ________________________________________________ ________________________________________________ ________________________________________________ ________________________________________________ ________________________________________________ ________________________________________________ ________________________________________________ ________________________________________________ ________________________________________________ ________________________________________________ ________________________________________________ ________________________________________________ ________________________________________________ ________________________________________________ ________________________________________________ For service on this or any other REED product or information on other REED products, contact REED Instruments at info@reedinstruments.com reedinstruments...
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