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Mastech MS8040 Скачать руководство пользователя страница 38

BENCH MODEL MULTIMETER

Open the tools cover on the top cover, and open the fuse cover in the tool case.

Remove the blown fuse, replace with fuse of the same size and rating. Make sure the new fuse is centered in the fuse

holder.

Replace the blown fuse with same ratings. The A input terminal is protected by a F10A/250V fast blow ceramic fuse,

Φ6×32mm. The mA input terminal is protected by a F300mA/250V fast blow fuse, Φ5×20mm..

Fuse rarely need replacement and blow almost always as a result of the operator’s error.

Never use the bench multimeter unless the fuse cover is in place and fastened fully.

Note: 

To avoid electrical shock, disconnect the test leads and any input signals before replacing the fuses. Replace only with

same type of fuses. The 

A 

input terminal is protected by a F10A/250V fast blow ceramic fuse. The 

mA 

input terminal is

protected by a F300mA/250V fast blow fuse.

Replacing the Power Fuse

Use the following procedure to examine or replace the power fuses:

1. Turn the power switch to off, and remove the power cable from live power source.

2. Disconnect test leads from any live source, turn the rotary switch to off, and remove the test leads from the input terminals.

3. Replace the power fuse from the supply power inlet with fuse. Replace the blown fuse with same ratings.

4. The power fuse: 100mA / 250V, Fast, Φ5×20mm.

Note:

 To avoid electrical shock, disconnect power cable from live power source , and remove the test leads and any input 

signals before replacing the power fuses. Replace only with same type of fuses.

35

Содержание MS8040

Страница 1: ...ifications 3 Front Panel 3 Rear Panel 7 LCD Display Description 9 Function Descriptions 10 Chapter 3 Operation Manual 11 Understanding AC Zero Input Behavior of True RMS Meters 11 DC AC TRMS Voltage 11 DCmV ACmV 13 Ohm Continuity DIODE 14 Capacitance Measurement 15 Logic Frequency Duty cycle Measurement 16 Clamp Measurement 17 I ...

Страница 2: ...ative Measurement 24 Max Min Value 25 Data Hold 25 Low Passed Filter 25 Peak Value 26 RS232 Interface 26 Auto Power Off 26 Chapter 4 Specification 27 General Specification 27 Range and Accuracy 27 Chapter 5 Maintenance 33 Introduction 33 Replacing the Fuse 33 Replacing the Power Fuse 34 Replacing the Battery 34 Chapter 6 Accessories 35 II ...

Страница 3: ...BENCH MODEL MULTIMETER III ...

Страница 4: ...wet environments Inspect the Meter before using it Do not use the Meter if it appears damaged Inspect the test leads before use Do not use them if insulation is damaged or metal is exposed Check the test leads for continuity Replace damaged test leads before using the Meter Verify the Meter s operation by measuring a known voltage before and after using it Do not use the Meter if it operates abnor...

Страница 5: ...nnections connect the common test lead before connecting the live test lead When disconnecting disconnect the live test lead before disconnecting the common test lead Disconnect circuit power and discharge all high voltage capacitors before testing resistance continuity diodes or capacitance Before measuring current check the Meter s fuses and turn OFF power to the circuit before connecting the Me...

Страница 6: ... Frequency and Duty Measurement Capacity Range from 0 01nF to 220mF AC TRMS Peak Max Min value Measurement Function Max Min Relative Measurement Function Low Passed Filter Function RS 232 Optical Isolation Interface PC Software for Display Data Record and Data Analysis Power Supply Methods 220V 110V AC 50 60Hz 9V 6F22 Battery 1 5 6 AA Battery Temperature Measurement Clamp Measurement Front Panel F...

Страница 7: ...Replacing the Power Fuse Front Panel Features 1 VΩHz Terminal Input positive terminal for all measurement except current measurement connected with red test leads 2 COM Terminal 4 ...

Страница 8: ...als in case caused damage 6 Display Screen 7 Button Button Description Name Description FUNC Function toggling Back Light Wake up press this button can wake the meter in auto power off mode RANGE Toggle to manual mode in autorange mode increase range in manual mode toggle to autorange mode when pressing longer than 1 S in manual mode Hz Under frequency measurement toggle from frequency to duty HOL...

Страница 9: ...r function most of noise above 1KHz will decay greatly RELΔ LCD panel displays relative value PC LINK LCD panel displays RS232 the meter communicates with PC software FUNC button description Rotary Position Input Signal DCV ACV DCmV ACmV DCA ACA TEMP DCμA ACμA DCmA ACmA DCA ACA 6 ...

Страница 10: ...uency X X X Duty X X X X Temperature X X Note 1 In Capacitance Measureing mode when MAX MIN or REL function is activated the data sent to PC software is the actual value Note 2 When PEAK function is activated the data sent to PC software is invalid Note 3 meaning the function can be selected X menaing the function is invalid Rear Panel Rear panel as blow 7 ...

Страница 11: ...Replacing the Power Fuse 1 Battery Cover Replace 9V 6F22 or 1 5 6 AA battery 2 Supply Power Inlet with Fuse Houses Fuse 0 1A 250V 3 Power Switch 4 RS232 Socket 8 ...

Страница 12: ...BENCH MODEL MULTIMETER LCD Display Description 1 Bargraph Display Zone 2 Digital Display Zone 9 ...

Страница 13: ...selected DC Direct Current AC Alternating Current Hold status is selected Diode test is selected Continuity test is selected RS232 Communication with PC terminal is selected P MIN Reading is minimum peak value P MAX Reading is maximum peak value REL Relative readings function is selected MIN Reading is minimum value MAX Reading is maximum value 10 ...

Страница 14: ...ed Relative measurement Show the difference between actual value and the relative base Display Value Actual Value Relative Value Max Min Show the minimum or maximum value recorded and the present measurement Low passed filter Most of noise above 1KHz will decay greatly So obtain more stable and accurate readings on low frequency response Peak hold Hold Max and Min peak value RS232 Interface Chapte...

Страница 15: ...ects the appropriate range in the autorange mode The function and measurement are displayed 5 By pressing the RANGE button it is possible to select range manually While displaying OL during manual range measurement it is necessary to select a larger range When OL displaying under the maximum range it indicates the voltage exceeding 1000V so it is necessary to remove both the red and black test lea...

Страница 16: ...anel displays DC press FUNC button when measuring AC mV and LCD display AC 2 Connect red test lead with VΩHz terminal and black test lead with COM terminal 3 Connect test leads to test circuit 4 The function and measurement are displayed 5 While displaying OL during measurement it is necessary to remove both the red and black test leads from the 13 ...

Страница 17: ...ely Notes In case of probe hanging in the air the voltage inducted by the testing line may cause unstable readings on the display screen but that will not affect the accuracy of measurement Note Do not measuring the voltage exceed the 220mV voltage 14 ...

Страница 18: ...f the ohm continuity or diode 4 Connect test leads to test circuit 5 The function and measurement are displayed 6 The beeper emits a continuous tone if the input is approximately below 30Ω Under diode test The forward voltage of the semiconductor junction is measured Note In case of performing resistance or continuity test on circuit board it is necessary firstly to turn off the power of the circu...

Страница 19: ...display F 2 Connect red test lead with VΩHz terminal and black test lead with COM terminal 3 Connect test leads to measure capacitance 4 The function and measurement are displayed Notes 1 Discharge the capacitance before measuring 2 Do not to perform capacitance measurement on a circuit board on which there are other parallel devices for that may cause a very large error 16 ...

Страница 20: ... 90 To perform the measurement 1 Turn rotary switch to Hz position LCD panel displays Hz 2 Connect red test lead with VΩHz terminal and black test lead with COM terminal 3 Connect test leads to measuring circuit 4 Pressing Hz button to toggle between frequency and duty cycle measurement 5 The function and measurement are displayed 17 ...

Страница 21: ...OM terminal 3 Connect test leads to clamp adapter s output terminal 4 The Meter selects the appropriate range in the autorange mode The function and measurement are displayed 5 By pressing the RANGE button it is possible to select range manually While displaying OL during manual range measurement it is necessary to select a larger range When OL displaying under the maximum range it indicates the v...

Страница 22: ...erature from 30 to 1300 To perform the measurement 1 Turn rotary switch to TEMP position LCD panel default displays ambient temperature 2 Connect Multi Function socket IN terminal with VΩHz terminal Connect Multi Function socket COM terminal with COM terminal 3 Connect K type thermocouple to Multi Function socket input terminal Clamp adapter adapter 19 ...

Страница 23: ...t from 0 01μA 2200μA To perform the measurement 1 Turn rotary switch to position LCD panel displays DC press FUNC button when measuring AC Current and LCD display AC 2 Connect red test lead with μA m A terminal and black test lead with COM terminal 3 Turn off the power of the measured circuit connect the red and black probes to the measured circuit in serial way and then turn on the power of the m...

Страница 24: ...ressing the RANGE button it is possible to select range manually While displaying OL during manual range measurement it is necessary to select a larger range When OL displaying under the maximum range it indicates the voltage exceeding 2200μA so it is necessary to remove both the red and black test leads from the circuit immediately 21 ...

Страница 25: ...n when measuring AC Current and LCD display AC 2 Connect red test lead with μA m A terminal and black test lead with COM terminal 3 Turn off the power of the measured circuit connect the red and black probes to the measured circuit in serial way and then turn on the power of the measured circuit 4 The Meter selects the appropriate range in the autorange mode The function and measurement are displa...

Страница 26: ...the circuit immediately DC A AC A measurement The Meter is capable of measuring current from 0 1mA 10A To perform the measurement 1 Turn rotary switch to position LCD panel displays DC press FUNC button when measuring AC Current and LCD display AC 2 Connect red test lead with A terminal and black test lead with COM terminal 3 Turn off the power of the measured circuit connect the red and black pro...

Страница 27: ...ment in case of measured value being AC or including AC elements it is possible to measure and display the frequency on the display zone by pressing Hz key However it has a certain requirements for the amplitude of alternating signal and the meter has varied requirements for signal amplitude when it is in different ranges for information of which please refer to below 2 Press Hz key again to measu...

Страница 28: ...ELΔagain to exit relative measurement Changes of measurement value may be found in relative measurement which also can be used for the small resistance measurements for example when performing resistance measurement connect the red test lead and the black test lead in short press the REL key to record the values of resistance resistance of both the red and black lines and after that performing res...

Страница 29: ...er than one second Data Hold Pressing HOLD button to activate hold mode LCD panel display HOLD hold mode makes the meter stop updating the LCD pressing HOLD button again will exit hold mode Low Passed Filter The meter provides a 3 order low pass filter to reduce the influence of high frequency noise above 1KHz 3dB This LPF feature is available in all ACV measuring mode Pressing LPF button to activ...

Страница 30: ...ss peak button longer than 1S the meter exits peak mode RS232 Interface Connecting RS232 terminal and PC USB socket with RS232 cable in accessories and press PCLINK Button then the meter communicate with PC software LCD display RS232 PC can record print the data from the meter by running PC software correspondingly Press PCLINK button again the meter terminate the communication with PC and don t d...

Страница 31: ...A terminal 0 1A 250V line power fuse Optical Isolution RS232C Interface Operating Temperature 18 28 relative humidity 80 Storage Temperature 20 60 relative humidity 80 Temperature Coefficient 0 05 Specified Accuracy per 18 or 28 Dimensions 238mm W 230mm L 83mm H Weight Approx 1 5kg without power cord Range and Accuracy The below listed accuracies under different ranges refer to those which are gua...

Страница 32: ...5 30 200V 10mV 0 5 30 1 5 30 2 5 30 750V 0 1V 0 5 30 1 5 30 1KHz Unspecified Note Above accuracies can be guaranteed within 20 100 of the full range DC Voltage Accuracy Range Resolution Accuracy 200mV 0 01mV 0 05 6 2V 0 1mV 0 05 6 20V 1mV 0 05 6 200V 10mV 0 05 6 1000V 0 1V 0 05 6 Note Above accuracies can be guaranteed within the full range AC Current Accuracy Range Resolutio Accuracy 29 ...

Страница 33: ... 8 30 1 0 30 1 2 30 20mA 1μA 0 8 30 1 0 30 1 2 30 200mA 10μA 0 8 30 1 0 30 1 2 30 10A 1mA 1 0 30 1 5 30 2 30 Note Above accuracies can be gurranteed within 20 90 of the full range DC Current Accuracy Range Resolution Accuracy 200μA 0 01μA 0 15 15 2000μA 0 1μA 0 15 15 20mA 1μA 0 15 15 200mA 10μA 0 15 15 30 ...

Страница 34: ...s 1 Above accuracies can be guaranteed within the full range 2 Accuracy for diode and continuity are unspecified In Continuity Test Mode the bluzzer will beeper if the measure value lower than 20Ω may or not beep if the measure value between 20Ωand 50 Ω not beep when the measure value higher than 50Ω Capacitance Accuracy Range Resolution Accuracy 20nF 0 01nF 1 2 30 200nF 0 1nF 1 2 30 2μF 1nF 1 2 3...

Страница 35: ...ithin the full range Above specification from 20nF to 2uF ranges are specified under REL mode The reading is calibrated to zero by relative function when input is floating Logic Frequency Frequency Range Signal Accuracy 20Hz 220MHz Vpp 3V square wave 0 06 10 Linear Frequency Input Range AC Sensitivity TRMS sine wave 5Hz 10KHz 10KHz 100KHz 200mV 5mV 10mV 2V 50mV 100mV 20V 500mV 1000mV 200V 5V 10V 3...

Страница 36: ...0μA 50μA Note1 Unspecified 20mA 50μA Note 1 Unspecified 200mA 5mA Note 1 Unspecified 10A 500mA Note1 Unspecified Note 1 Freqency response 50Hz 10KHz Duty Duty Scale Accuracy 5 95 10 ClAMP Range Resolution Accuracy DC 220A 0 01A 0 1 10 DC 2200A 0 1A 0 1 10 AC 220A 50 60Hz 0 01A 1 30 AC 2200A 50 60Hz 0 1A 1 30 Temperature Range Resolution Accuracy 33 ...

Страница 37: ...epairs or servicing not covered in this manual should only be performed by qualified personnel Replacing the Fuse Use the following procedure to examine or replace the multimeter of fuses Turn the power switch to off and remove the power cable from live power source Disconnect test leads from any live source turn the rotary switch to off and remove the test leads from the input terminals 34 ...

Страница 38: ... input signals before replacing the fuses Replace only with same type of fuses The A input terminal is protected by a F10A 250V fast blow ceramic fuse The mA input terminal is protected by a F300mA 250V fast blow fuse Replacing the Power Fuse Use the following procedure to examine or replace the power fuses 1 Turn the power switch to off and remove the power cable from live power source 2 Disconne...

Страница 39: ...ted battery and replace with a new equivalent 9 voltge battery Two types of batteries are used in the bench multimeter one of is a NEDA 1604 6F22 006P type one piece or equivalent 9 voltge battery other of is IEC LR6 AM3 AA 1 5V 6 pieces Never use the bench multimeter unless the battery cover is in place and fastened fully Note To avoid electrical shock disconnect power leads from live power sourc...

Страница 40: ...BENCH MODEL MULTIMETER RS232C Cable 3415 1 K Type Thermocouple 1 Multi Function Socket 1 CD ROM 1 37 ...

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