Instruction Manual for MAS830LH MAS830H Series Digital Multimeter
Contents
1. Instruction Manual for MAS830LH MAS830H MAS830BH MAS838H Series Digital Multimeter i BACK LIGHT heoo OFF 6004 v _ AAA AL ALAA AR n m CATION at 0 0 CE o CU ff Joane com _ Vama MAS830L 7 edi DIGITAL MULTIMETER Introduction The instrument of this series is a small hand held 3 1 2 digital multimeter featuring stable highly reliable and anti drop performance It is provided with a LCD display of 15 mm height for clear reading The circuit design takes LSI double integral A D converter as its core under the protection of an overload protection circuit making it a superior and handy instrument It can be used to measure DC and AC voltage DC current resistance diodes transistors temperature and for in circuit continuity test Measurement features of the types of this series Fent res MAS830LH MAS830H MAS830BH MAS838H Alternating Voltage measurement V Direct Voltage measurement V Direct current measurement A Resistance measurement Q Diode measurement gt Temperature measurement C On off measurement Data hold Backlight 1 Display 3 1 2 digital 15 mm height 7 sections LCD display 2 BACKLIGHT Press the BACKLIGHT button to turn on the backlights which will last 5 seconds to turn it on again hit the button as needed 3 Function and range2. age pay special attention to avoid an electric shock Direct current measurement 1 Place the black probe into the COM jack for current to be measured not exceeding 200mA put the red one into the V Q mA jack For current to be measured between 200mA and 10A insert the red probe into the 10A jack 2 Set the function range switch to the desired A range and connect the probe in series with the load to be measured The current value and the polarity connected to the red probe will be shown on the display Notice If you do not know the measured voltage range in advance set the function range switch to the maximum range and then gradually turn to smaller ranges until satisfactory resolution If the display shows 1 this indicates an overrange measurement and the switch should be set to a higher range The symbol Z beside the probe indicates the maximum input current is 200mA or 10A depending on the inserted jack Overcurrent will blow the fuse Alternating voltage measurement 1 Place the red probe into the VOQmA jack and the black one into the COM jack 2 Turn the switch to V and connect the probe to the power supply or load to be measured Note Refer to point 1 2 3 and 4 for direct current voltage measurement Resistance measurement 1 Place the black probe into the COM jack and the red one into the V Q Hz jack 2 Turn the switch to the COM jack and connect the probe to the re
3. erature 10 C to 50 C Low voltage indication on the display Appearance dimension 138mmx69mmx31mm Weight 170g Direct current voltage measurement 200mV 100nV 0 5 of reading 3 digits 0 5 of reading 3 digits 40 5 of reading 3 digits 200V 100mV 0 5 of reading 3 digits 600V 0 8 of reading 5 digits Overload protection 200mV range 250V dc or rms the rest ranges 600V dc or rms Direct current measurement 20nA 0 01pA 1 of reading 3 digits 200A 0 1nA 1 of reading 3 digits 1 of reading 3 digits 1 5 of reading 5 digits 3 of reading 10 digits Overload protection F1 200mA 250V Fuse F2 10A 250V MAS838H no 20pA position Alternating voltage measurement 200V 100mV 1 2 of reading 10 digits 600V 1 2 of reading 10 digits Overload protection 600V dc or rms Frequency range 40Hz to 400Hz Display Average effective value of sinusoid Resistor Range Resolution Accuracy 2009 0 10 0 8 of reading 5 digits 2kQ 10 0 8 of reading 2 digits 20kQ 10Q 0 8 of reading 2 digits 200kQ 100Q 0 8 of reading 2 digits 2MQ 1kQ 1 0 of reading 5 digits Maximum open circuit voltage 3 2V Overload protection 250V DC or RMS Diode and circuit on off measurement Range Description e When the on resistance is smaller than 70 30 Q the built in buzzer will beep Displays the approxi
4. mate diode positive voltage Overload protection 250V DC or RMS AC Temperature measurement Range Resolution Measurement Accuracy 20 C to 0 C 10 Range 2 digits 1 C 0 C to 400 C 1 0 Range 3 digits 400 C to 2 0 Range 1000 C Instructions Notices before operation 1 Plug the instrument in check the 9V battery if it is low the symbol E will display requiring battery replacement otherwise follow the steps below 2 The A besides the probe jack indicates that the input voltage or current should not exceed the specified limits to protect the internal circuit 3 Before measurement turn the function range switch to the desired range Direct voltage measurement 1 Insert the red probe into the VQmA jack and the black one into the COM jack 2 Turn the function range switch to the range of V and connect the probe to the power supply or load to be measured The polarity touched by the red probe will be on the display Notice If you do not know the measured voltage range in advance set the function range switch to the maximum range and then gradually turn to smaller ranges until satisfactory resolution If the display shows 1 this indicates an overrange measurement and the switch should be set to a higher range Do not input a voltage of more than 600V it is capable of indicating a higher voltage but with the risk of damaging the inside circuit When taking the measurement of high volt
5. scharge all capacitors Be careful when taking measurement of voltage higher than 60V DC 30V AC Remember to keep your fingers behind the hand shield of the probe When measuring a TV set or switch power supply watch for pulse in the circuit that may damage the multimeter Before measuring any transistor make sure the probe is not connected to any circuit being measured Before taking the measurement of voltage with the probe make sure there is no electronic element connected to the test socket of the transistor Maintenance Before removing the rear cover disconnect the probe from the circuit to be measured To protect the internal circuit replace the fuse with one of the same specification F1 250mA 250V F2 10A 250V Don t use the instrument until the rear cover is placed back and the screws are tightened Clean the housing of instrument only with a wet rag dripped with little detergent but never chemical solution In case of any abnormality stop using it and sent it for maintenance Technical data Accuracy of reading 5 digits one year warranty Ambient temperature 18 Cto 28 C Ambient humidity 80 General features Maximum voltage between input and the ground CAT IT 600V Fuse F1 250mA 250V F2 10A 250V Power 9V battery NEDA 1604 or 6F22 Maximum display value 1999 Over range indication p Polarity display for negative polarity Operating temperature 0 C to 40 C Storage temp
6. sistor being measured and read the results on the display Notice If the resistor being measured is greater than the maximum value of the selected range the display will show 1 requiring the selection of a higher range It normally takes a few seconds for the reading to get stable when measuring a resistor larger than 1 MQ In default of input for instance open circuit the display shows 1 When measuring an online resistor de energized the circuit being measured and discharge all capacitors P Diode measurement Insert the black probe into the COM socket and the red one into the V Q mA then the red probe will be of positive polarity Turn the switch to the range and connect the red probe to the positive pole of the diode being measured and the black one to the negative pole read the approximate forward voltage drop of the diode on the display Circuit On Off measurement Insert the black probe into the COM jack and the red one into the V Q mA jack Turn the switch to the position and connect the probes in parallel with two points of the circuit being measured If the resistance between the two points is less than 100Q the built in buzzer will beep to indicate the continuity between the two points Temperature measurement Turn the switch to the C position and insert the black probe of the thermocouple sensor into COM jack and the red one into the V Q mA jack lace the operating terminals temperature meas
7. switch Select different functions and range 4 VOmA Jack 5 COM jack 6 10A Jack 7 Data hold button Press the HOLD button The LCD will hold the last reading measured and display the El symbol When the button is released the instrument will return to normal ITY Y Mv y y yt fev Be wy J0ADC_ COM VQmA MAS830L Safety Information MAS830L MAS830 MAS830B and MAS838 Digital Multimeters are designed based on IEC61010 600V CAT II and pollution degree 2 To ensure the safe and accurate use please read the instruction manual carefully Safety Signs Important safety information Read the manual High voltage with danger Ground Double Insulation Class Il safety equipment Fuse must be replaced as per the specification herein The instrument can only be used in conjunction with the probe for the compliance with safety standards If the probe needs replacing due to damage the replacement must be of the same type or the same electrical specifications Do not exceed the input limits specified for each range When the instrument is measuring do not touch the input terminal not in use When a measurement range is uncertain turn the function range switch to the maximum range position Before turning the function range switch make sure the probe is open with the circuit being measured Before on line resistance measurement turn off all power and di
8. urement terminals onto or inside the object being measured and directly read the temperature value in C on the display v When the switch is turned to the C position and the sensor is in an open circuit the display shows room temperature Replacement of battery and fuse Take out the two screws of the rear cover to remove the housing The specification of the fuse is F1 250mA 250V F210A 250V The replacement should be of the same specification The battery for this multimeter is 9V NEDA 1604 or 6F22 The replacement should be of the same specification Don t put the instrument into use until the rear cover is screwed after replacing battery or fuse A Warning To avoid electric shock make sure the probes are disconnected from the measured circuit before removing the rear cover Make sure the rear cover is tightly screwed before using the instrument Under normal conditions it is unnecessary to replace the fuse Don t replace it until the probes are unplugged and the power is shut down
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