MS8238A
User's Manual
Digital Multimeter
600V
CAT II
250
Page 1: ...MS8238A User s Manual Digital Multimeter 600V CAT II MS8238A 250 ...
Page 2: ...us situations Caution is required when measuring close to the mete s safety limits Never exceed the protection limit values indicated in the specifications for each range of measurement 2 3 Electrical Symbols 3 3 Description and Usage 4 3 1 Front Panel 4 3 2 Display 5 3 3 Using the Meter 6 4 Specifications 10 4 1 General Specifications 10 4 2 Technical Specifications 11 5 Maintenance 14 5 1 Genera...
Page 3: ...rrect DC voltage readings check the circuit for AC voltage first then put the meter in the appropriate DC voltage range Turn off circuit power and check fused before connect the leads when measuring current Turn circuit power on after making connection Never use the meter unless the back cover is in place and fastened securely When the low battery indicator is displayed replace the battery The acc...
Page 4: ...0A input jack 5 Common jack 6 Input jack all functions except current greater than 200mA 7 Non contact voltage NCV button 8 Non contact voltage NCV indicator 8 1 2 7 3 4 5 6 3 2 Display 1 Low battery indicator 2 Data hold 3 Measurement display 4 Polarity indicator 5 Diode cycle 2 3 1 4 MS8238A 250 5 ...
Page 5: ... display it means the measurement has exceeded the current range Move the rotary switch to a higher range Warning Do not measure voltages higher than 600V DC or AC rms to perevent damage to the meter or personal injury 3 3 4 AC DC current measurement Turn off power to the circuit Allow all capacitors to discharge Set the rotary switch to the appropriate AC or DC current range Depending on the curr...
Page 6: ...es sec Display 3 digit LCD display Overload Indication Display shows OL Low Battery Indication 4 2 Technical Specifications Accuracy of reading digits at 18 C 28 C with a relative humidity of 80 guaranteed for a period of one year 4 2 3 Resistance Resolution Accuracy 200Ω 2kΩ 0 1kΩ 0 001kΩ 0 1Ω 0 01kΩ 0 001MΩ 20kΩ 200kΩ 2MΩ Measuring range 0 8 of reading 4 digits Overload protection 250V DC or AC ...
Page 7: ...e red test lead to the input jack and the black lead to the COM jack Connect the leads to the circuit under test If the measured resistance is less than 50Ω the buzzer will sound Warning To prevent injury or damage to the meter turn off power to circuit and discharge all capacitiors fully before making resistance measurements 3 3 7 Diode test Turn off power to the circuit Allow all capacitors to d...
Page 8: ...ack F10A H 250V fuse Max input current mA jack 200mA AC rms 10A jack 10A AC rms When measuring current exceeding 2A do not measure for longer than 2 minutes continuously Wait 10 minutes to continue measurement 4 2 8 Battery Test Resolution Accuracy 12V 0 01V 0 01V 9V Position 0 8 of reading 7 digits 0 8 of reading 7digits 1 5V 0 001V 3 0 of reading 5digits Overload protection F250mA H 250V fuse 4 ...
Page 9: ...determination of a lack of voltage present in a conductor Detection could be impaired by socket design insulation etc When measuring voltage through input jacks NCV indicator may light up due to induced voltage External environmental interference could cause false NCV indications 1 Under normal conditions it is unnecessary to replace the fuse Don t replace it until the probes are unplugged and the...
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