DIGITAL MULTIMETER MODEL CDM-45 Part No.4500065 OPERATING INSTRUCTIONS 0404 DIGITAL MULTIMETER MODEL CDM-45 Part No.
GENERAL CHARACTERISTICS Temperature Measurement O Maximum Display :1999 counts (3½ digits) with auto polarity indication and eng. unit. 1. Set the Function switch to C position and the LCD display will show ambient temperature. Measuring Method system. : Dual-Slope integration A-D convertor 2. Insert the ‘K’ type thermocouple into the TEMP socket and contact the object to be maesured with the thermocouple probe. Read the display. Overrange Indication : Figure “1” displayed on the LCD. Max.
Note: 1. If the resistance value being measured exceeds the maximum value of the range selected, an over-range indication will be displayed(“1”). Select a higher range. For resistance of approx. 1 Megohm and above, the meter may take a few seconds to become stable. This is normal for high resistance readings. 2.. When the input is not connected, i.e. an open circuit, the figure’1’ will be displayed for an over-range condition. 3.
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: • Inspect the test leads for insulation damage or exposed metal. Damaged leads should be replaced. • • • • Select the proper function and range tor your measurement. • Electrically disconnect the live, or hot test lead before disconnecting the common test lead.
SPECIFICATIONS OPERATION 1. Check the 9-volt battery by setting the ON-OFF switch to ON, if the battery is weak, a + - sign will appear on the display. If this does not appear on the display, proceed as below. See MAINTENANCE if the battery has to be replaced. 2. The mark, or symbol, next to the test lead jacks, is a warning that the input voltage or current should not exceed the indicated values, to prevent damage to internal circuitry. 3.
DC Current Range 2mA Resistance Accuracy Resolution 1µA ±0.8% of rdg ± 1 digit 20mA Range Accuracy Resolution 200Ω ±0.8% of rdg ± 3 digits 0.1Ω 10µA 2KΩ 1Ω 10Ω 200mA ±1.5% of rdg ± 1 digit 0.1mA 20KΩ 10A ±2% of rdg ± 5 digits 10mA 200KΩ AC Current 1KΩ 20MΩ ± 1% of rdg ± 2 digits 10KΩ 200MΩ ±5% of rdg-10 dig ±10 dig 100KΩ Overload Protection: 220V DC/RMS.
