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Summary of Contents for Clarke CDM 25
- Page 1 DIGITAL MULTIMETER Model No: CDM 25 OPERATING INSTRUCTIONS 0507 CDM25 - Page 1...
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Page 2: Features
Thank you for purchasing this CLARKE compact digital multimeter. This instrument is designed to measure AC and DC voltages, AC and DC current, Resistance, Diode, and to perform continuity checks with accuracy and ease. GUARANTEE This product is guaranteed against faults in manufacture for 12 months from purchase date. -
Page 3: Table Of Contents
SPECIFICATIONS Measuring Method: Dual integration mode Sampling Rate: 2 - 3 times per second Low Battery Indication: BATT displayed on the left of LCD Operating Temperature: 0EC - 40EC, less than 80% RH Dimensions: 70 (W) x 120 (H) x 18 (D) mm Weight Approx: 110g (Incl batteries) Battery:... -
Page 4: Safety Precautions
SAFETY PRECAUTIONS Read this information before using the meter, taking special care regarding any WARNING or IMPORTANT notices. The following safe practices and proper operating procedures should be followed when using any multimeter: • WARNING: TO AVOID ELECTRIC SHOCK, USE CAUTION WHEN WORKING ABOVE 40V DC OR 25V AC RMS. -
Page 5: Description Of Front Panel
DESCRIPTION OF PANEL 1 - Push Button ON/OFF switch 2 - D - H Push Button for data hold function 3 - Rotary Function Switch 4 - Test Leads. Red - positive, Black - negative polarity 5 - 3 ¾ digit LCD from 0 to 9999 counts CDM25 - Page 5... -
Page 6: Operating Instructions
OPERATING INSTRUCTIONS WARNING: Extreme care should be taken when reading high voltages. DO NOT exceed maximum voltage for which the meter is designed. DC VOLTAGE MEASUREMENT 1. Set function switch to V position 2. Set range switch to desired position. If magnitude of voltage is unknown beforehand, set the switch to its highest range and then reduce until satisfactory reading is obtained. -
Page 7: Ac Voltage
AC VOLTAGE MEASUREMENT 1. Set function switch to V position. 2. Set range switch to desired position. Measurement reading can be obtained at 2V and 20V positions, but accuracy is not guaranteed. 3. Connect test leads across load or source under measurement. -
Page 8: Dc Current
DC CURRENT 1. Set function switch to A position 2. Open the circuit to be measured and connect the test leads in series with the load in which current is to be measured. 3. Read current value on display along with polarity of RED test lead. -
Page 9: Resistance Measurement
RESISTANCE MEASUREMENT WARNING: If resistor to be measured is connected to a circuit, ensure all power to the circuit is OFF, and all capacitors are fully discharged before attaching test leads. 1. Set function switch to Ω position. 2. Connect test leads across resistor to be measured, and read resistance value on display. -
Page 10: Diode
DIODE TEST 1. Set function switch to position. 2. Connect the red lead to the anode of the diode to be tested, and the black lead to the cathode. Read the approx. forward voltage drop on the display in mV. If the leads are reversed, “OL”... -
Page 11: Maintenance
MAINTENANCE CAUTION: 1. Make sure test leads are dsconnected from the test drcuit, and range switch is set to OFF before opening the case. 2. Do not operate the instrument unless the back cover is in place and fastened. BATTERY REPLACEMENT 1. - Page 12 Clarke International on one of the following numbers: For Spare Parts and Service, please contact your nearest dealer, or CLARKE International, on one of the following numbers. PARTS & SERVICE TEL: 020 8988 7400 PARTS & SERVICE FAX: 020 8558 3622 e-mail as follows: PARTS: Parts@clarkeinternational.com...
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