Table of Contents
Related Manuals for Mastech MS8239A
Summary of Contents for Mastech MS8239A
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Page 1: Digital Multimeter
MS8239A Digital Multimeter User's Manual MS8239A DIGITAL MULTIMETER Auto Power Off 600V CAT III IEC61010-1 HOLD 200m 10A BATT. 1.5V 200k 200m 600V MAX 10A/ 500V 200mA/250V... -
Page 2: Table Of Contents
CONTENTS CONTENTS Overview..........1 General Specifications.......11 Safety Indicators......1 Accuracy Indicators......12 Safe Working Habits......2 DC Voltage..........13 AC Voltage..........13 Electric Symbols.......4 Resistance Measurement.....14 Meter Instructions......5 Diode..........14 Meter Appearance......5 Continuity Measurement.......14 Display..........5 DC Current..........15 Measuring Operation......7 Battery Test.........15 Data Hold ..........7 Maintenance........15 DC/AC Voltage Measurement.....7 General Maintenance......16 DC Current Measurement ....8... -
Page 3: Overview
“safety information” and “warning and procedures: related notes” carefully before using the meter. The MS8239A is a small hand-held, safe and reliable • Check the case before using the meter. Don't use the 3.5” digital multimeter with stable performance and meter with damaged case. -
Page 4: Electric Symbols
• When connecting circuits, connect the common test Electric Symbols line first, then connect the charged test line. When Important safety information disconnecting circuits, disconnect the charged test line first, then disconnect the common test line. Before measuring resistance, continuity, and diodes, AC (Alternating Current) first turn off power and discharge all high voltage capacitors. -
Page 5: Meter Instructions
(4) Positive input jack of 10A (connected with the red test probe). (5) All the common input jacks for measuring MS8239A (connected with the black test probe). (6) Positive input jack of voltage, resistance, mA current, diode, continuity and battery test (connected with the red test probe). -
Page 6: Measuring Operation
Measuring Operation DC Current Measurement: Data Hold Turn off the power to the circuit to be tested. Discharge all the high voltage capacitors on the The data hold function can keep the current readings circuit to be tested. on the display. To enter and exit reading maintenance Rotate the function selection switch to the mode: appropriate DC current position. -
Page 7: Resistance Measurement
Note • When there is no input (for example, open circuit), Before measuring current, first check the meter's the display will show “1”, which means that the fuse. When measuring, use correct input end and measured value is out of range. function. -
Page 8: Battery Test
• Environmental temperature and humidity: 0~40°C, Connect the black and red test probe to cathode <80% RH (do not use meter when temperature <10°C). and anode of the diode to be tested, respectively. • Storage temperature and humidity: -10~60°C and The meter will display the diode's forward bias <70% RH (remove the battery). -
Page 9: Dc Voltage
DC Voltage Resistance Measuring range Accuracy Resolution Measuring range Accuracy Resolution 200mV 0.1mV 200Ω 0.1Ω 0.001V 2kΩ 0.001kΩ ±(0.5% of reading +3 digits) 0.01V ±(0.8% of reading +5 digits) 20kΩ 0.01kΩ 200V 0.1V 200kΩ 0.1kΩ ±(0.8% of reading +3 digits) 600V 2MΩ... -
Page 10: Battery Test
Direct Current General Maintenance Warning Measuring range Accuracy Resolution To avoid injury or damage to the meter, don't wet 20mA 0.01mA ±(1.0% of reading +5 digits) the inner parts of the meter. Before opening the 200mA 0.1mA case or battery cover, remove the connecting cable between the test probe and the input signal. -
Page 11: Replace Fuse
Please follow these steps to replace battery: Turn off the power to the meter. Remove all test probes from the input jacks. Loosen screws on the battery cover with screwdriver. Remove the battery cover. Remove old batteries. Replace with two new AAA batteries, placing the positive and negative ends in their correct positions.
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