Accuracy : ± (0.8% rdg + 1dgt) on all ranges except Ranges : 200mV, 2V, 20V, 200V, 1000V

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1 . SPECIFICATIONS Digital Multimeter Model : 0 Instruction Manual. General Specifications Display : ½ digit liquid crystal display (LCD) with a maximum reading of 999. Polarity : Automatic, (-)negative polarity indication Zero adjustment : Automatic Overrange indication : Highest digit of() or (-) is diplayed at MSD Low battery : is displayed when the battery voltage drops below the operating voltage Measurement rate : measurements per second, nominal. Operating conditions : 0 C to + 0 C at < 7% RH Storage conditions : -0 C to + 0 C, 0-80% RH with battery removed. : specifications at ± C, less than 7% RH. Power Supply : Single, standard 9-volt battery, Eveready or equivalent. Battery life (typical) : 00 hours. Dimensions : 70 x 80 x 8 mm. (approx.) Weight : 0gms including battery (approx.) Accessories : Test leads (pair) x, spare fuse 0.8A/ 0V x, battery (installed) x, instruction manual x & carring case x. Electrical Specifications Accuracies are ± (% reading plus number of digits) at ± C, and humidity of less than 7% RH. RESISTANCE s : 00V, KV, 0KV, 00KV, 000KV, 0MV, 00MV. DC VOLTAGE : ± (0.8% rdg + dgt) on all ranges except s : 00mV, V, 0V, 00V, 000V ± (% rdg + dgt) on 00V : ±(0.%rdg + dgt) on all ranges. ± (% rdg + dgt) on 0MV Resolution : 00μV to V ± (% rdg + 0 dgt) on 00MV Input Impedance : 0MV Resolution : 00mV to 00KV Overload Protection : 00V DC/0VAC for sec. on 00mV Overload Protection : 00V DC/AC range, 00V DC/800V AC on all other Test Voltage : 00V, 00MV :.V MAX. ranges. Other ranges 0.V MAX. AC VOLTAGE (0-00Hz) CONTINUITY BEEPER s : 00mV, V, 0V, 00V, 70V Threshold : 00V approx. : ± (% rdg + dgt) on all ranges except Response Time : 00mS ±(.% rdg + dgt) on 70V h FE Test Resolution : 00μV to V Base DC Current : 0 ma Input Impedance : 0MV V CE :.8 ± 0.V Overload Protection : 00V DC/0VAC for sec. on 00mV range, 00V DC/800V AC on all other : 0 To 000 ranges. Diode Test DC CURRENT Test Current :.0 ± 0.mA s : 00mA, ma, 0mA, 00mA, 0A Test Voltage :.V max. (In 0A range maximum measuring time. OPERATION < 0s with an interval of minutes.). VOLTAGE MEASUREMENT : ± (% rdg + dgt) on all ranges except. Connect red test lead to V-V input terminal and black test lead to ±(% rdg + dgt) on 0A range COM input terminal. Resolution : 00nA to 0mA. Set Function/ switch to desired voltage type (DC or AC) and Voltage Burden : mv except,.v max. on 0A range range. If magnitude of voltage is not known, set switch to the highest Overload Protection : 0.8A/0V FUSED. on all ranges except range and reduce until a satisfactory reading is obtained. A unfused for 0 sec. on 0A range. Turn off power to the device or circuit being tested and discharge all AC CURRENT (0-00Hz) capacitors. s : 00mA, ma, 0mA, 00mA, 0A. Connect test leads to the device or circuit being measured. (In 0A range maximum measuring time. Turn on power to the device or circuit being measured. Voltage value < 0s with an interval of minutes.) will appear on the digital display along with the voltage polarity. : ± (.% rdg + dgt) on all ranges except ±(% rdg + dgt) on 0A range. Turn off power to the device or circuit being tested and discharge all capacitors prior to disconnecting test leads. Resolution : 00nA to 0mA. CURRENT MEASUREMENT Voltage Burden Overload Protection : : mv except,.v max. on 0A range 0.8A/0V FUSED on all ranges except. Connect red test lead to the ma input terminal for current measurements up to 00 milliamperes. Connect black lead to the COM A unfused for 0 sec. on 0A range input terminal. 0 :

2 . Set Function/ switch to desired current type (DC or AC) and range. If magnitude of current is not known, set switch to the highest range and reduce until a satisfactory reading is obtained.. Turn off power to the device or circuit being tested and discharge all capacitors.. Open the circuit in which current is to be measured. Now securely connect test leads in series with the load in which current is to be measured.. Turn on power to the device or circuit being tested.. Read current value on digital display. 7. Turn off all power to the device or circuit being tested and discharge all capacitors. 8. Disconnect test leads from circuit and reconnect circuit that was being tested. 9. For current measurment of 00mA or greater, connect the red test lead to 0 A input terminal & black test lest lead to the COM input terminal. If the resistance being measured is part of a circuit, turn off power to the circuit and discharge all capacitors.. RESISTANCE MEASUREMENTS. Connect red test lead to V-V input terminal and black test lead to COM input terminal.. Set Function/ switch to desired V position. If magnitude of resistance is not known, set the switch to highest range and reduce until a satisfactory reading is obtained.. If the resistance being measured is part of a circuit, turn off power to the circuit and discharge all capacitors.. Connect test leads to the device or circuit being measured. When measuring high resistance, be sure not to contact adjacent points even if insulated, because some insulators have a relatively low insulation resistance, causing the measured resistance to be lower than the actual resistance.. Read resistance value on digital display. If a high resistance value is shunted by a large value of capacitance, allow digits to stabilize. NOTE A. All resistance ranges on the DMM, except the 00V and 00MV range, are low-power ohms. This allows accurate measurements of in-circuit resistance because the test voltage is below that is necessary to activate a diode junction B. The 00MV range has a fixed 0-count off set in its reading. When the test leads are shorted together in this range, the meter will display 00 in the 00MV range. This reading must be subtracted in order to obtain a true measurement. For example, when measuring a resistance of 00MV on the 00MV range, the display will read 0.. DIODE AND TRANSISTOR TEST MEASUREMENTS The special Diode Test Function allows relative measurements of forward voltage drops across diodes and transistor junctions. This function also permits measurement of in-circuit semiconductor junctions... DIODE TESTS. Connect red test lead to V-V input terminal and black test lead to COM input terminal.. Set Function/ switch to the diode test position.. If the semiconductor junction being measured is part of to a circuit, turn off power to the circuit and discharge all capacitors.. Connect test leads to the device.. Read forward voltage drop value on digital display.. If the digital display reads overrange () reverse the lead connections. The placement of the test leads when the forward reading is displayed indicates the orientation of the diode. The red lead is positive and the black lead is negative. if overrange () is displayed with both lead connections, the junction is open. If a low-reading (less than,000) is obtained with both lead connections, the junction is shorted internally or (if junction is measured in a circuit) the junction is shunted by a resistance less than KV. In the latter case the junction must be disconnected from the circuit in order to verify its operation... TRANSISTOR JUNCTION TESTS. Bipolar transistors can be tested in the same manner as diode, junctions formed between the base and emitter and the base and collector of the transistor. Measurement between the collector and emitter also should be made to determine if a short is present.. TRANSISTOR hfe MEASUREMENTS. Transistor must be out of circuit. Set the function/range switch to the hfe position.. Plug the emitter, base and collector leads of the transistor into the correct holes in either the NPN or the PNP transistor test socket, whichever is appropriate for the transistor being checked. Read the hfe (beta, or DC current gain) in the display.. CONTINUITY MEASUREMENTS. Set the selectors switch to the ))) position.. Continuity between probe tips will be indicated by an audible beep when resistance is below 00V.. MAINTENANCE. TROUBLESHOOTING If there appears to be a malfunction during the operation of the meter, the following steps should be performed in order to isolate the cause of the problem:. Check the battery.. Review the operating instructions for possible mistakes in operating procedure.. Inspect and test the Test Probes for a broken or intermittent connection.. Inspect and test the fuse. If it is necessary to replace the fuse, be sure to install one of the proper current rating.. BATTERY AND FUSE REPLACEMENT To prevent electrical shock hazard, turn off the multimeter and any device or circuit under test and disconnect the test leads before removing the battery snap or the rear cover. a. BATTERY REPLACEMENT. Remove the battery cover screw, and slide the battery cover towards the bottom of the meter.. Remove and disconnect the old battery from the meter and replace with a new unit. Wind the excess lead length once around the battery clip. Install the battery and replace the battery cover. CAUTION Failure to turn off the multimeter before installing the battery could result in damage to the instrument and to the battery if the battery is connected incorrectly to the multimeter. b. FUSE REPLACEMENT. Remove the battery cover screw, and slide the battery cover towards the bottom of the meter.. Remove the old fuse and replace with a new fuse rated for 0.8 amps. 0 volts. Use of wrong fuse could result in serious accident. CERTIFICATE OF CALIBRATION We hereby certify that this product has been calibrated and found to be in accordance with the applicable SPECIFICATIONS and MECO STANDARDS. Accuracies of the standard equipment used in this calibration are traceable to the National Standards. MECO METERS PVT. LTD. Plot No. EL-0, MIDC Electronic Zone, TTC Industrial Area, Mahape, Navi Mumbai (INDIA) Tel : , 7700 (Board) Fax : , sales@mecoinst.com Web : SR. NO. : CHECKED BY : DATE : 7 MODEL NO. : 8 0 :

3 AUTORANGING DIGITAL MULTIMETER MODEL : 9A0 FRONT PANEL CONTROLS INSTRUCTION MANUAL. LCD Display. Hold Switch. Switch. Power ON / OFF Switch. Select Switch V/ / / AC-DC / C- F. Function Switch 7. 0A Input Jack 8. μa / ma / Temp (+) Input Jack 9. Common / Temp (-) Input Jack 0. V / V / / Input Jack Getting Acquainted With Your Meter LCD Display Illustration AUTO AC DC M.H mv V ma ma A V kv MV 0 C 0 F Low Battery Indication Auto Mode Alternating Current or Voltage Direct Current or Voltage Digital Display for Reading Diode Measurement Mode Continuity Mode Manual Hold Voltage Measurement Current Measurement Resistance Measurement Centigrade / Fahrenheit Temperature Measurement 7 8 9, 0. SPECIFICATIONS. General Specifications Display / digit liquid crystal display (LCD).0 mm height, max. reading 999 with automatic decimal point selection annunciators of mv, V, μa, ma, A, V, KV, MV,,, AC, DC, 0 C, 0 F, MH, AUTO, Selection Auto & Manual for Voltage, Resistance, μa, ma & A measurement. Polarity Automatic, ( - ) negative polarity indication. Zero adjustment Automatic Over range indication OL is displayd except in 000VDC, 70VAC & 0A AC/DC range. Low battery mark turns on. Sample rate measurement per second. Operating conditions 0 C to + 0 C at > 7% RH (Noncondensing) Storage conditions -0 C to + 0 C, 0-80% RH with battery removed specificaton at 7 ± C and less than 7% RH. Power Supply Two, standard,.v battery. Eveready 0 or equivalent. Battery life (typical) 00 hours Dimensions x 8 x mm (approx.) Weight 7gms including battery (approx.) Accessories Test leads (pair) x, carring case x, battery (installed) x, Instruction Manual x & K type Thermocouple x LCD DISPLAY 9A0 9A0 :

4 . Electrical Specification Accuracies are ± (% reading plus number of digits) at 7 ± C and humidity of less than 7% RH. DC VOLTAGE (Auto & Manual Ranging) s : 00mV, V, 0V, 00V, 000V : ± (0.% rdg + dgt) on 00mV & V ± (0.7% rdg + dgt) on 0V & 00V ± (% of rdg + dgt) on 000V Resolution : 00μV to V Input Impedance : 0MV on all ranges except, > 0MV on 00mV MV on V Overload Protection : 00V DC/0V AC for sec. on 00mV range, 00V DC/800V AC on all other range. AC VOLTAGE (Auto & Manual Ranging) 0-00Hz : 00mV, V, 0V, 00V, 70V (00mv range manual only) : ± (.0% rdg + 8 dgt) on all ranges except, ± (.% rdg + 8 dgt) on 70V Resolution : mv to V Input Impedance : 0MV on all ranges except, MV on V Overload Protection : 00V DC/800V AC on all ranges. DC CURRENT (Auto & Manual Ranging) : 00μA, 000μA, 0mA, 00mA, 0A : ± (.% rdg + dgt) on all ranges Resolution : 00μA to 0mA Burden Voltage : mv max on all ranges except, 70mV max on 0A range. Overload Protection : 0.A / 0V fused on all ranges except, 0A / 00V fused on 0A AC CURRENT (Auto & Manual Ranging) 0-00Hz : 00μA, 000μA, 0mA, 00mA, 0A : ± (.% rdg + dgt) on all ranges Resolution : 00μA to 0mA Burden Voltage : mv max on all ranges except, 70mV max on 0A range. Overload Protection : 0.A / 0V fused on all ranges. 0A / 00V fuse on 0A RESISTANCE (Auto & Manual Ranging) : 00V, KV, 0KV, 00KV, MV, 0MV : ± (0.7% rdg + dgt) on all ranges except ± (.% of rdg + dgt) on MV ± (.% of rdg + dgt) on 0MV Resolution : 0.V to 0KV Test Current : 0.7mA on 00V, 0.mA on KV, 0μA on 0KV, μa on 00KV Overload Protection : 00V DC/AC Continuity Check Threshold Level : 0V Approx. Response Time : m Sec. Approx. Open Circuit Voltage : 0.V Approx. Indication : is displayed on LCD and buzzer sounds at continuity. Diode Test Measurement Current :.0 ± 0. ma Approx. Open Circuit Voltage :.V Approx. Temperature : -0 0 C to 00 0 C - 0 F to F : ± (.0% rdg + dgt) Resolution : 0 C Sensor : K Type Thermocouple. OPERATION MEASUREMENT PROCEDURE SWITCH OPERATION (A) POWER SWITCH POWER switch enables to switch on the power to the meter. (B) V / / / AC - DC / 0 C- 0 F SELECT SWITCH The switch is used for Current,Resistance & Temperature measurement. (a) In current measurement initially DC value is measured & DC is displayed on LCD. To measure AC value press SELECT switch. The display will change from DC to AC. Again switch over to DC press the switch once more. (b) In resistance measurement the switch is used to change over between V / / measurement. (c) In temperature measurement the switch is used to change over 0 C- 0 F measurement. The corrosponding annunciator will be displayed. (C) RANGE SWITCH RANGE switch is used to operate the meter in MANUAL mode. The present range of the meter will be increased by pressing the RANGE switch. To come out of manual mode press RANGE switch for approx seconds. The meter will operate in AUTO mode again and AUTO will be displayed on LCD. (D) HOLD SWITCH When HOLD switch is pressed the present data is locked and MH symbol appears on LCD. When HOLD switch is pressed again, the meter functions normally and MH sign disappears. BUZZER It sounds when operating SELECT switch, HOLD switch and RANGE switch. It sounds for less than threshold level in continuity function. AUTO POWER OFF The meter will be switched off if no Function switch or key is used for approx minutes. To restart press hold key.. VOLTAGE MEASUREMENTS (DC/AC). Connect red test lead to ` V input terminal and black test lead to COM input terminal.. Set the function switch to (DCV or ACV) position.. Connect test lead to the device or circuit being measured.. Turn on power to the device or circuit being measured voltage value will appear on the digital display along with the voltage polarity.. Turn off power to the device or circuit being tested and discharge all capacitors prior to disconnecting test lead.. CURRENT MEASUREMENTS (DC/AC). Switch on the multimeter by pressing POWER switch.. Connect red test lead to the μa / ma input terminal for current measurements up to 00 milliamperes. Connect black test lead to the COM input terminal. For current greater than 00mA, connect red test lead to `A terminal.. Set Function switch to μa, ma & A as per measurement. If the range of current to be measured is not known, start from the higher range ie. `A and change range as required.. Select DC or AC by Pressing SELECT Switch.. Open the circuit in which current is to be measured. Now securely connect test leads in series with the load in which current is to be measured A0 :

5 . Turn on power to the device or circuit being tested. 7. Read current value on digital display. 8. Turn off all power to the device or circuit being tested and discharge all capacitors. 9. Disconnect test leads from circuit & reconnect circuit that was being tested.. RESISTANCE MEASUREMENTS. Switch on the multimeter by pressing POWER switch.. Connect red test lead to V input terminal and black test lead to COM input terminal.. Set the Function Switch to V position.. If the resistance being measured is part of a circuit, turn off power to the circuit and discharge all capacitors.. Connect test leads to the device or circuit being measured. When measuring high resistance, be sure not to contact adjacent points even if insulated, because some insulators have a relatively low insulation resistance, causing the measured resistance to be lower than the actual resistance. Read resistance value on digital display. If a high resistance value is shunted by large value of capacitance, allow digits to stabilize. NOTE : While measuring high resistance value more than one megohms, the digital reading is liable to receive the influence of noise, or of some insulators that have a relatively low insulation resistance. Therefore to make accurate measurements guard-shield is recommended. Black test leads is connected to the negative side.. DIODE & CONTINUITY. Switch on the meter by pressing POWER switch.. Set FUNCTION switch to V position.. A. Diode Check. Press SELECT switch once, will be displayed.. Connect black test lead to the cathode side and red test lead to the anode side of the semiconductor. Display reading is forward voltage.. Connect the test leads in reverse of above. If the display reading is same as when the leads are open, the semiconductor is good, otherwise it is defective. Note : This test is influenced by the other devices connected to the diode. Hence isolate it before testing.. B. Continuity. Press SELECT switch once will be displayed.. Insert black test lead into COM terminal and red test lead to V Terminal.. Remove power from the circuit being tested and discharge all capacitors.. Connect the test leads to the circuit being measured. If resistance value is lower than 0V, buzzer sounds. Note : Continuity test is to check continuity of the circuit. If precise data of resistance is needed, use V function.. TEMPERATURE MEASUREMENT. Switch on the multimeter by pressing POWER switch.. Set function switch to TEMP position.. Connect Red probe of K type thermocouple to ma / ma / TEMP ( + ) terminal and Black probe to COM / TEMP ( - ) terminal.. Touch the end of temperature probe to the area or serface of the object whose temperature is to be measured. The display reading is in 0 C.. Press SELECT switch to measure reading in 0 F scale. 9 0 IMPORTANT To avoid heat damage to the meter, keep it away from sources of very high temperature. The life of the temperature probe is also reduced when subjected to very high temperatures. ( Operating is 0 to 00 C ). MAINTENANCE WARNING: Remove test leads before changing batteries or fuse or performing any servicing. Never operate instrument unless bottom cover is closed.. TROUBLESHOOTING If there appears to be a malfunction during the operation of the meter, the following steps should be performed in order to isolate the cause of the problem:. Check the battery.. Review the operating instructions for possible mistakes in operating procedure.. Inspect and test the Test Probes for a broken or intermittent connection.. Inspect and test the fuse. If it is necessary to replace the fuse, be sure to install one of the proper current rating.. BATTERY AND FUSE REPLACEMENT To prevent electrical shock hazard, turn off the multimeter and any device or circuit under test and disconnect the test leads before removing the bottom cover. Digram A 9A0 :

6 A. BATTERY REPLACEMENT (Refer Diagram `A ) sign in display indicates LOW BATTERY. There are about 0 hours of operation left after first appears. Open the bottom cover and replace with two fresh.v Eveready type 0 or equivalent batterys, observing polarity as marked. Incorrect polarity will cause display to remain blank. To prolong battery life, Switch OFF the POWER when not making measurement. B. FUSE REPLACEMENT (Refer Diagram A ) If no current measurements is possible, check for blown overload protection fuse. Open the bottom cover to the locate the fuse. Replace only with original type of fuse.. PRECAUTIONS. Observe all safety rules while making measurements. CAUTION should be exercised when making measurements since dangerous voltages can be present in normally safe circuit or areas.. Although this instrument is electronically and fuse protected against overloads, care should be taken to avoid excessive and repeated overloads when possible.. It is normal for this instrument digits to wander when on the mv range, since the DC input impedance is a very high. This high input impedance is needed when making accurate low voltage measurements.. If this instrument is NOT going to be operated for an extended period, remove the batteries since damage can result from leakage.. SAFETY RULES WARNING An electrical shock causing 0 miliamps of current to pass through the heart will stop most human heartbeats. Voltage as low as Volts DC or AC rms should be considered dangerous and hazardous since it can produce a fatal current under certain conditions. Higher voltage are even more dangerous. Observe the following safety precautions.. Do not exceed the following input ratings. Personal injury or damage to the instrument may result. DC VOLTS V (DC + AC peak) AC VOLTS... 70V rms OHMS... 0V rms ma... 00mA (fuse protected) 0A... 0A (fuse protected) COM... Do not float more than 000 volts from earth ground.. Always check to make sure test lead plugs are fully inserted into input terminals and the function / range selector switch is set to the proper position.. Never use the multimeter unless the bottom cover is closed.. Remove test leads before replacing battery or fuses, and before performing any servicing on the multimeter.. Turn off equipment while making test connections in high voltage circuits. Discharge high-voltage capacitors after removing power.. For the safest voltage or current measurements in high voltage equipment, do not touch equipment, meter, or test leads while power is applied. 7. If possible, familiarize yourself with the equipment being tested and the location of its high voltage points. However, remember that high voltage may appear at unexpected points in defective equipment. Use an insulated floor material or floor mat to stand on and an insulated work bench surface; make certain such surfaces are not damp or wet. CERTIFICATE OF CALIBRATION We hereby certify that this product has been calibrated and found to be in accordance with the applicable SPECIFICATIONS and MECO STANDARDS. Accuracies of the standard equipment used in this calibration are traceable to the National Standards. MECO METERS PVT. LTD. Plot No. EL-0, MIDC Electronic Zone, TTC Industrial Area, Mahape, Navi Mumbai (INDIA) Tel : , 7700 (Board) Fax : , sales@mecoinst.com Web : SR. NO CHECKED BY DATE MODEL NO : : : : 9A0 :

7 FRONT PANEL CONTROLS AUTORANGING DIGITAL MULTIMETER MODEL : 80AUTO INSTRUCTION MANUAL. LCD Display. REL Switch. Switch. Power ON / OFF Switch. V / / / / AC-DC Select Switch. Hold Switch 7. Hz / Duty Switch 8. Function Switch 9. 0A Input Jack 0. μa / ma / Temp+ Input Jack. Common / Temp- / C- Input Jack. V / V / / / C+ Input Jack Getting Acquainted With Your Meter LCD Display Illustration. SPECIFICATIONS Digital Display for Reading. General Specifications Display 999 counts liquid crystal display (LCD) DC Direct Current or Voltage.0mm height, max. reading 999, AC Alternating Current or automatic decimal points selection and Voltage annunciators of mv, V, μa, ma, A, V, KV, MV, AC, DC,, AUTO,, KHz, MHz,, AUTO Auto Mode nf, μf, H, O C, % Manual Zero in Capacitance Selection Auto & Manual for DC, AC Voltage, Measurement Resistance, μa, ma & A measurement H Data Hold Auto only for Frequency, capacitance, Temperature measurement 7 Low Battery Indication Polarity Automatic, (-) negative polarity indication 8 Diode Measurement Mode Zero adjustment Automatic for all ranges except 9 Continuity Mode capacitance (manual zero) 0 kmv Resistance Measurement Over range indication OL is displayed except in 000V DC, 70V AC and 0A AC/DC range kmhz Frequency Measurement Low battery mark turns on nmf Capacitance Measurement Sample rate measurement per second mv Voltage Measurement Operating conditions 0 C to +0 C, 0-7% RH mma Current Measurement (Noncondensing) Storage conditions -0 C to +0 C, 0-80% RH with O C Temperature Measurement battery removed % Duty Cycle Measurement specification at 7 ± C and less than 7% RH Power Supply Two Standard.V battery % H 0 C Eveready type 0 or equivalent Battery life (typical) 00 hours 0 Dimensions x 8 x mm (approx.), Weight 7gms including battery (approx.), Accessories Test leads (pair) x, carring case x, battery (installed) x, Instructional LCD DISPLAY 80AUTO manual x & K Type Thermocouple x 80AUTO :

8 . Electrical Specification Accuracies are ± (% reading + number of digits) at 7 ± C and humidity of less than 7% RH DC VOLTAGE (Auto & Manual Ranging) : 00mV, V, 0V, 00V, 000V : ± (0.% rdg + dgt) on 00mV & V ± (0.7% rdg + dgt) on 0V & 00V ± (.0% rdg + dgt) on 000V Resolution : 0.mV tov Input Impedance : 0MV on all ranges Overload Protection : 00V DC / 0V AC for sec. on 00mV, 00V DC / 800V AC on all ranges AC VOLTAGE (Auto & Manual Ranging) 0-00Hz : V, 0V, 00V, 70V : ± (.0% rdg + dgt) on all ranges except, ± (.% rdg + 8 dgt) on 70V Resolution : mv to V Input Impedance : 0MV on all ranges Overload Protection : 00V DC / 800V AC on all ranges DC CURRENT (Auto & Manual Ranging) : 00μA, 000μA, 0mA, 00mA, A, 0A : ± (.% rdg + dgt) Resolution : 0.μA to 0.0A Burden Voltage : < 0.7V on 00mA < 0.V on 0A Overload Protection : 0.A / 0V fuse on 00mA 0A / 00V fuse on 0A AC CURRENT (Auto & Manual Ranging) 0-00Hz : 00μA, 000μA, 0mA, 00mA, A, 0A : ± (.% rdg + dgt) Resolution : 0.μA to 0.0A Burden Voltage : < 0.7V on 00mA < 0.V on 0A Overload Protection : 0.A / 0V fuse on 00mA 0A / 00V fuse on 0A RESISTANCE (Auto & Manual Ranging) : 00V, KV, 0KV, 00KV, MV, 0MV, : ± (0.7% rdg + dgt) on all ranges except ± (.% rdg + dgt) on MV, ± (.% rdg + dgt) on 0MV Resolution : 0.V to 0.0MV Test Current : Approx 0.7mA on 00V, 0.mA on KV, 0μA on 0KV, μa on 00KV Overload Protection : 00V DC/AC FREQUENCY (Auto Ranging) : 9.999Hz, 99.99Hz, 999.9Hz, 9.999kHz, 99.99kHz, 999.9kHz, 9.999MHz : ± (0.% rdg + dgt) % DUTY CYCLE (Auto Ranging) : 0.% to 99.9% : ± (0.% rdg + dgt) Resolution : 0.% CAPACITANCE (Auto Ranging) : 0nF, 00nF, μf, 0μF, 00μF : ± (.0% rdg + 0 dgt) Resolution : pf to 0.0nF TEMPERATURE : -0 O C ~ 00 O C : ± (.0% rdg + dgt) Resolution : O C Sensor : K Type Thermocouple CONTINUITY CHECK b) In resistance measuement this switch is used to change over Threshold Level : 70V Approx. between V,,, measurement. The corresponding annunciator Response Time : m Sec. Approx. will be displayed on LCD. Open Circuit Voltage : 0.V Approx. (E) HOLD SWITCH Indication : is displayed on LCD and buzzer When HOLD switch is pressed, the present data is locked and symbol sounds at continuity i H Iappears on LCD. When HOLD switch is pressed again the meter DIODE TEST functions normally & sign disappears. Measurement Current :.0 ± 0. ma Approx. Open Circuit Voltage :.V Approx. (F) HZ / DUTY SWITCH Press this key to toggle between frequency & duty cycle measurement.. OPERATION BUZZER It sounds when operating SELECT Switch, REL / Switch, MEASUREMENT PROCEDURE Switch, Hold Switch & Hz / Duty Switch. SWITCH OPERATION It sounds for less than threshold level in continuity function. (A) POWER SWITCH AUTO POWER OFF POWER switch enables to switch on the power to the meter. By default, the meter is in auto power off mode. In this mode, the meter (B) REL / SWITCH will be switched off after minutes, if no range change is done. If this Press (REL / ) switch to enter the Relative mode. The annunciator mode is not required, press the select key along with power on key. The turns on. The display reading is stored as a referance value and the auto power off mode will be turned off. display becomes zero. The switch is functional in capacitance range only.. VOLTAGE MEASUREMENTS (DC/AC) (C) RANGE SWITCH. Switch on the multimeter by pressing POWER switch.. Connect red test lead to V input terminal & black test lead to RANGE switch is used to operate the meter in MANUAL mode. COM input terminal. The present range of the meter will be increased by pressing the RANGE switch. To come out of manual mode, press the RANGE switch. Set the Function Switch to V position. for approx seconds. The meter will operate in AUTO mode again. Select DC or AC by pressing SELECT switch. and AUTO will be displayed on LCD.. Connect test lead to the device or circuit being measured. (D) SELECT SWITCH. Turn on power to the device or circuit being measured. Voltage value will appear on the digital display along with the voltage The switch is used for voltage, current & resistance measurement. polarity. a) In voltage and current measurement, initially DC value is measured and DC is displayed on LCD. To measure AC value, the SELECT 7. Turn off power to the device or circuit being tested and discharge switch has to be pressed once. The display will change from DC to all capacitors prior to disconnecting test lead. AC. To again switch over to DC, press the switch once more AUTO :

9 . CURRENT MEASUREMENTS (DC/AC). Switch on the multimeter by pressing POWER switch.. Connect red test lead to the μa / ma input terminal for current measurements up to 00 milliamperes. Connect black test lead to the COM input terminal.. For current measurement of 00mA or greater, connect the red test lead to 0A input terminal & black test lead to the COM input terminal. Set function switch to A position.. Set Function Switch to μa for μa measurement ma for ma measurement and A for A measurement. Do not keep the Meter in the circuit for more than seconds when the function switch is on A range.. Select DC or AC by Pressing SELECT Switch.. Open the circuit in which current is to be measured. Now securely connect test leads in series with the load in which current is to be measured. 7. Turn on power to the device or circuit being tested. 8. Read current value on digital display. 9. Turn off all power to the device or circuit being tested and discharge all capacitors. 0. Disconnect test leads from circuit & reconnect circuit that was being tested.. RESISTANCE MEASUREMENTS. Switch on the multimeter by pressing POWER switch.. Connect red test lead to V input terminal and black test lead to COM input terminal.. Set the Function Switch to V position.. If the resistance being measured is part of a circuit, turn off power to the circuit and discharge all capacitors.. Connect test leads to the device or circuit being measured. When measuring high resistance, be sure not to contact adjacent points even if insulated, because some insulators have a relatively low insulation resistance, causing the measured resistance to be lower than the actual resistance. 9. Read resistance value on digital display. If a high resistance value is shunted by large value of capacitance, allow digits to stabilize. NOTE : While measuring high resistance value more than one megohms, the digital reading is liable to receive the influence of noise, or of some insulators that have a relatively low insulation resistance. Therefore to make accurate measurements guard-shield is recommended. Black test leads is connected to the negative side.. DIODE, CONTINUITY & CAPACITANCE MEASUREMENT. Switch on the meter by pressing POWER switch.. Set Function Switch to V position.. A. Diode Check. Press SELECT switch once, will be displayed.. Connect black test lead to the cathode side and red test lead to the anode side of the semiconductor. Display reading is forward voltage.. Connect the test leads in reverse of above. If the display reading is same as when the leads are open, the semiconductor is good, otherwise it is defective. Note : This test is influenced by the other devices connected to the diode. Hence isolate it before testing.. B. Continuity. Press SELECT swtich once will be displayed.. Insert red test lead to V terminal & black test lead to COM terminal.. Remove power from the circuit being tested and discharge all capacitors.. Connect the test leads to the circuit being measured. If resistance value is lower than 70V, buzzer sounds. Note : Continuity test is to check continuity of the circuit. If precise data of resistance is needed, use V function.. C. Capacitance Measurement. Press SELECT swtich once will be displayed.. By Pressing REL / Switch, get Zero display. Connect red test lead to C+ terminal & black test lead to C- terminal. 0. Discharge the capacitor before measuring. Connect the capacitor to the test lead for accurate measurements of low value capacitors. Connect the capacitor directly to the input terminals of the meter. Observe polarity while measureing polarised capacitors. Read capacitors value directly on the LCD.. FREQUENCY & DUTY CYCLE MEASUREMENTS Fig. Fig. There are positions for Frequency & Duty cycle measurements. a) Hz position ( Not for LINE Frequency measurement ) b) ~V position ( For LINE Frequency measurement ).a) Hz position ( Not for LINE Frequency measurement ) [Fig.] Sensitivity : 0.8V (0Hz to 00kHz) V ~ 0V (above 00kHz) Frequency : Hz to MHz Duty Cycle :.% to 99.9% Over Voltage Protect : 00V DC or AC Peak ) Switch on the multimeter by pressing Power switch. ) Connect test leads to VV & common terminal. ) Set rotary switch to Hz position. ) Select Frequency or Duty cycle by pressing Hz / Duty key. ) Connect the test leads across the source or load under measurement..b) ~V position ( For LINE Frequency measurement ) [Fig.] Sensitivity : V Frequency : 0 Hz to 00 Hz. Duty Cycle :.% to 99.9% Over Voltage Protect : 000V DC or AC Peak ) Switch on the multimeter by pressing Power switch. ) Connect test leads to VV & common terminal. ) Set rotary switch to ~V position. ) Select Frequency or Duty cycle by pressing Hz / Duty key. ) Connect the test leads across the source or load under measurement.. TEMPERATURE MEASUREMENT. Switch on the multimeter by pressing POWER switch.. Set function switch to TEMP position.. Connect Red probe of K type thermocouple to ma / ma / TEMP ( + ) terminal and Black probe to COM / TEMP ( - ) terminal.. Touch the end of temperature probe to the area or surface of the object whose temperature is to be measured. The display reading is in 0 C. Digram A 80AUTO :

10 IMPORTANT To avoid heat damage to the meter, keep it away from sources of very high temperature. The life of the temperature probe is also reduced when subjected to very high temperatures. ( Operating is 0 to 00 C ). MAINTENANCE WARNING: Remove test leads before changing batteries or fuse or performing any servicing. Never operate instrument unless bottom cover is closed.. TROUBLESHOOTING If there appears to be a malfunction during the operation of the meter, the following steps should be performed in order to isolate the cause of the problem:. Check the battery.. Review the operating instructions for possible mistakes in operating procedure.. Inspect and test the Test Probes for a broken or intermittent connection.. Inspect and test both the fuses. If it is necessary to replace the fuse, be sure to install one of the proper current rating.. BATTERY AND FUSE REPLACEMENT (Refer Diagram A ) To prevent electrical shock hazard, turn off the multimeter and any device or circuit under test and disconnect the test leads before removing the bottom cover. A. BATTERY REPLACEMENT sign in display indicates LOW BATTERY. There are about 0 hours of operation left after first appears. Open the bottom cover and replace with two fresh.v Eveready type 0 or equivalent battery, observing polarity as marked. Incorrect polarity will cause display to remain blank. To prolong battery life, Switch OFF the POWER when not making measurement. B. FUSE REPLACEMENT If no current measurement is possible, check for blown overload protection fuses. Open the bottom cover to the locate the fuse. Replace only with original type of fuse.. PRECAUTIONS. Observe all safety rules while making measurements. CAUTION should be exercised when making measurements since dangerous voltages can be present in normally safe circuit or areas.. Although this instrument is electronically and fuse protected against overloads, care should be taken to avoid excessive and repeated overloads when possible.. It is normal for this instrument digits to wander when on the mv range, since the DC input impedance is a very high. This high input impedance is needed when making accurate low voltage measurements.. If this instrument is NOT going to be operated for an extended period, remove the battery since damage can result from leakage.. SAFETY RULES WARNING An electrical shock causing 0 miliamps of current to pass through the heart will stop most human heartbeats. Voltage as low as Volts DC or AC rms should be considered dangerous and hazardous since it can produce a fatal current under certain conditions. Higher voltage are even more dangerous. Observe the following safety precautions.. Do not exceed the following input ratings. Personal injury or damage to the instrument may result. DC VOLTS V (DC + AC peak) AC VOLTS... 70V rms OHMS... 0V rms ma... 00mA (fuse protected) 0A... 0A (fuse protected) COM... Do not float more than 000 volts from earth ground.. Always check to make sure test lead plugs are fully inserted into input terminals and the function / range selector switch is set to the proper position.. Never use the multimeter unless the bottom cover is closed.. Remove test leads before replacing battery or fuses, and before performing any servicing on the multimeter.. Turn off equipment while making test connections in high voltage circuits. Discharge high-voltage capacitors after removing power.. For the safest voltage or current measurements in high voltage equipment, do not touch equipment, meter, or test leads while power is applied. 7. If possible, familiarize yourself with the equipment being tested and the location of its high voltage points. However, remember that high voltage may appear at unexpected points in defective equipment. Use an insulated floor material or floor mat to stand on and an insulated work bench surface; make certain such surfaces are not damp or wet. Certificate of Calibration We hereby certify that this product has been calibrated and found to be in accordance with the applicable SPECIFICATIONS and STANDARDS. Accuracies of the standard equipment used in this calibration are traceable to the National Standards. MECO METERS PVT. LTD. Plot No. EL-0, MIDC Electronic Zone, TTC Industrial Area, Mahape, Navi Mumbai (INDIA) Tel : , 7700 (Board) Fax : , sales@mecoinst.com Web : SR. NO. : CHECKED BY : DATE : MODEL NO. : 80AUTO :