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Digital Multimeter

AM-1108

USER`S MANUAL

www.tmatlantic.com

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Summary of Contents for AM-1108

Page 1: ...Digital Multimeter AM 1108 USER S MANUAL www tmatlantic com...

Page 2: ...s Chapter 1 Introduction 2 Chapter 2 Getting Acquainted 4 Chapter 3 Making Measurements 13 Chapter 4 Using Memory Communications Features 21 Chapter 5 Changing the Default Settings 23 Chapter 6 Mainte...

Page 3: ...rwise the protective function shall be invalid Do not use the meter if it is damaged Before you use the meter inspect the case Look for cracks or missing plastic Pay particular attention to the insula...

Page 4: ...ug the meter with the circuit when measuring current and do not connect test lead in parallel with any circuit Symbols Symbols used on the meter and in this manual are explained in Table 1 1 Table 1 1...

Page 5: ...ht off The automatic backlight off is preset to 30s If user doesn t turn off backlight within 30s the meter will turn off backlight automatically From the Setup menu see Chapter 5 Changing the Default...

Page 6: ...nating current A frequency Measuring Signal direct and alternating current mA A frequency Public return Jacks of all the measurement Measuring Signal direct voltage direct mV voltage alternating volta...

Page 7: ...A Voltage Measurement TC Measurement Resistance Measurement Diode testing continuity testing RTD testing Capacitance None Direct current measurement Alternating current measurement Direct current meas...

Page 8: ...primary display shows MIN MAX AVG value in cycle while secondary display shows present reading Low battery indicator The indicator in the display notifies you that the batteries are low and should be...

Page 9: ...the arrow right of the bar graph indicates an overload condition 41000 Range display Digits display range in use 11 Time displays In addition it could be used to temperature display as well Unit disp...

Page 10: ...the meter on and press to select the set value in the mode None In measuring mode press to store the present reading as an offset reference subsequent readings show only the relative difference from t...

Page 11: ...average updates occur while the HOLD mode is enabled Auto HOLD Mode A H Warning Auto HOLD mode does not capture unstable or noisy readings Do not use Auto HOLD mode to determine that circuits are wit...

Page 12: ...ng that the reading appears with the highest available precision resolution If AUTO is already on press to enter MANUAL ranging in the present range You can then select the next manual range each time...

Page 13: ...o Ranging will be shut off and fixed the present range before enter max min mode Therefore set the right range before choose this mode To exit this mode press for more than 2 seconds or set the rotary...

Page 14: ...ference in electrical potential between two points The polarity of ac alternating current voltage varies over time while the polarity of direct current voltage is constant over time Ranges available i...

Page 15: ...y display 3 Press again to turn dB off Normally dB is measured as dBm which is a measure of decibels relative to 1 milliwatt The meter assumes a resistance of 600 in making this calculation This resis...

Page 16: ...is over the meter s range Measuring DC mV Voltage See Figure 3 4 1 Set the rotary switch to position and DC mV will be on display 2 Insert the black lead into COM terminal and the red lead to into the...

Page 17: ...4 000K 40 00K 400 0K 4 000M and 40 00M To measure resistance proceed as follows 1 Set the rotary switch to position Default value in this function 2 Insert the black lead into COM terminal and the re...

Page 18: ...The polarity of the black lead and red lead is and respectively Figure3 7 Diode Test In a circuit a similar diode should still indicate a forward bias reading of 0 5 V to 0 8 V however the reverse bi...

Page 19: ...all high voltage capacitors before measuring capacitance Use the dc voltage function to confirm that the capacitor is discharged The meter s capacitance ranges are 50 00nF 500 0nF 5 000 F 50 00 F 100...

Page 20: ...e for the measurement range as shown in Table 3 1 2 When using A jack set the rotary switch on position When using mA A jack set the rotary switch on position if the current is less than 4000 A and po...

Page 21: ...e Figure3 11 DC Current Measurement Figure3 12 AC Current Measurement Measuring Frequency and Duty cycle ratio See Figure3 13 In voltage and current DC mV excluded measurement press to display frequen...

Page 22: ...ber increments by one 3 Press for more than 2S or set the rotary switch to any other position to exit the SAVE mode LOG Mode Proceed as follows 1 Set the starting time and interval time of the real ti...

Page 23: ...e Warning To avoid electric shock disconnect the test leads when the rotary switch is in the MEM position Notice In MEM function each operation could only read or clear the data of one storing part 2...

Page 24: ...Selection Function Factory Default Power off time Set Range 0 to 60min 10min for each change Set zero to cancel auto power off function Use or to increment or decrement digit 10 minutes Backlight tim...

Page 25: ...4 Set the rotary switch on 5 Insert the black lead to COM jack and red lead to A jack 6 Using an ohmmeter check the resistance between the meter tested leads If the resistance is about 0 01 the fuse...

Page 26: ...counterclockwise so that the slot is parallel with the screw picture molded into the case 3 Replace the batteries and reinstall the battery door Secure the door by turning the screws one quarter turn...

Page 27: ...pdates 3 second Analog 41 segments updates 10 second Operating Temperature 5 C to 50 C Storage Temperature 10 C to 55 C Relative Humidity 0 C to 30 C 75 30 C to 40 C 50 Battery Type 4 AAA alkaline bat...

Page 28: ...easuring Impedance 10M Standard Value 100pF Common mode rejection ratio 50Hz or 60Hz 60dB Overvoltage protection 1000V DC Current Measurement Range Frequency Accuracy Remark 400 0 A 0 1 A 0 2 4 4000 A...

Page 29: ...0 1 1 Display updates 3 times second at 10Hz TC Measurement Function Input Range Resolution Accuracy Remark K 200 to 950 1 0 5 2 100 0 5 1 100 By using ITS 90 temperature scale Note The accuracy does...

Page 30: ...operation instruction is regarded as correct Whenever any user finds its mistakes omission etc he or she is requested to contact the manufacturer The present manufacturer is not liable for any accide...

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