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- 10 - 

capacitors. Remove the  meter and restore the circuit to normal operation. Pull out the test lead from “mA” 

terminal. 

 

Press SELECT 

Primary display 

Secondary display 
Press 2nd VIEW 

DCmA 

DCmA 

 

ACmA 

ACmA 

 

DCmA+ ACmA 

DCmA+ ACmA 

ACmA 

AcmA+Hz 

ACmA 

Hz 

 

4.5 AC/DC Current Measurement (ACA, DCA) 

The measurement of AC/DC current has four modes: DCA, ACA, DCA+ACA, and ACA +Hz 

 

Set the function key to “A

” position. 

 

Press SELECT button to select measurement mode. 

 

According  to  poetical  demands,  press  REL

,  MAX/MIN  and  2nd  VIEW  buttons  to  have  relative 

measuring or record. 

 

The  meter  is  in  auto  range  mode  and  will  automatically  select  a  most  suitable  range.  To  select  a  range 

manually  for  the  measurement,  press  RANGE  button  to  select  a  proper  range.  There  are  two  ranges  to 

choose from: 8.0000A/20.000A 

 

Connect the black test lead to “COM” terminal and the read 

test lead to “20A” terminal. 

 

Other operations apply the same as explained in section 4.4 

 

Press SELECT 

Primary display  Secondary display 

Press 2nd VIEW 

DCA 

DCA 

 

ACA 

ACA 

 

DCA+ACA 

(DC+AC)A 

ACA 

ACA+Hz 

ACA 

Hz 

 

4.6 Resistance Measurement (Ω) 

WANRNING: To avoid damage to the meter or the testing equipments disconnect circuit power and 

discharge all high voltage capacitors before measuring resistance. Use the DC function to confirm that the 

capacitor is discharged. 

 

NOTE: In measuring low resistance, the resistance of the test leads may cause an error of 0.1Ω~0.5Ω in the test 

results. To avoid this error, first short the test leads, next press REL

 button. The primary display will be null and 

the  secondary  display  displays  the  resistance  of  test  lead. 

Measure  the  to-be  tested  resistance  and  the  result  will  be 

displayed on the primary display. 

 

The  measurement  of  resistance  has  three  modes:  normal, 

continuity  and  Hi  resistance.  Press  SELECT  button  to  choose 

from these modes. 

Normal mode 

 

Set the function key to “Ω” position 

 

According  to  practical  demands,  press  REL

,  MAX/MIN 

and  2nd  VIEW  buttons  to  have  relative  measuring  or 

Содержание MT8145

Страница 1: ...Benchtop Instrument 80000 Counts 4 7 8 Bench Digital Multimeter Operation Manual...

Страница 2: ...s read this operation manual carefully before using this meter and follow the following safety guidelines Before use check and make sure that the instrument s plastic chassis the test leads and the in...

Страница 3: ...2 2 PANEL INSTRUCTIONS Fig 2 1 Front panel Fig 2 2 Rear Panel...

Страница 4: ...s TIMER key to start the secondary display for counting time Press TIMER key again to turn off the counting time display When the secondary display is display counting time press key SELECT to enter B...

Страница 5: ...ppears on the LCD display The relative measuring function measures the difference between the testing value and the reference value The current readings on the secondary display are used as a relative...

Страница 6: ...C DC AC DC AC voltage or current 10 PH PH Peak Hold Peak Hold 11 A H Auto Hold 12 AVG Average reading 13 Auto Auto mode 14 APO Auto power off sign 15 RS232 Communication on annunciation 16 MAX MIN MAX...

Страница 7: ...alue on the primary display and on the secondary display c If the measuring value is between and upper and lower limit the LCD displays the measuring value on the primary display and on the secondary...

Страница 8: ...lly will automatically exit the HOLD or MAX MIN mode 3 Enter or exit mauran range mode Press RANGE button to select manual range mode Then every press on the RANGE button the meter steps to a higher r...

Страница 9: ...choose from 8 0000V 80 000V 750 00V Connect the black test lead to COM terminal and the read test lead to V Hz terminal Touch the test leads to the test points and read the display on both the primary...

Страница 10: ...mpt an in circuit current measurement when the fuse is blown or when the voltage between open circuit and the ground is 1000V To avoid damage to the meter check the meter s fuse before proceeding Befo...

Страница 11: ...rations apply the same as explained in section 4 4 Press SELECT Primary display Secondary display Press 2nd VIEW DCA DCA ACA ACA DCA ACA DC AC A ACA ACA Hz ACA Hz 4 6 Resistance Measurement WANRNING T...

Страница 12: ...ance Use the DC function to confirm that the capacitor is discharged NOTE Some capacitors have polarities In measuring polarities capacitors touch the red test lead to the positive polarity and the bl...

Страница 13: ...nd read the display Measurement mode Primary display Secondary display Press 2nd VIEW Hz Hz kHz MHz High frequency mode Hi Hz In Hi Hz mode the frequency testing range is 8MHz 1000MHz divided into fou...

Страница 14: ...Read the display 4 10 Diode and Continuity Check WANRNING To avoid damage to the meter or the testing equipments disconnect circuit power and discharge all high voltage capacitors before measuring Us...

Страница 15: ...software which allows easy connections to PC for PC control Software operating environment Windos9x NT 2000 XP Software version V1 0 5 1 Installation Plug the CD disk into the CD drive Start up the se...

Страница 16: ...es you an easier view 5 11 Push Button Panel Basically the functions of the buttons on this panel are the same as the buttons on the multimeter Double click on the function buttons is in the same way...

Страница 17: ...m part of the panel indicate the current status of the data recorder Battery indicates the power supply status of the multimeter If power supply is in good status it will display Battery High Otherwis...

Страница 18: ...20A 1mA Table 4 ACA True RMS Range Resolution Accuracy Remarks 80mA 1 A 50Hz 5kHz 0 2 rdg 10 Fuse F750Ma 250v F13A 250V Voltage drop 800mV Max input current 20A up to15 seconds 800mA 10 A 8A 0 1mA 50H...

Страница 19: ...nd ground 1000V RMS Continuity beeper Approx 3kHz Display dual display 80000 update 4 times Sec Bar graph 23 segments update 40 times Sec Electromagnetic compatibility For all ranges and functions exc...

Страница 20: ...ter 7 1 Fuse replacement NOTE Please select fuse of the same specification to replace it Power fuse 200mA 250V located in input power socket Fuse for measuring current 800mA 250V located in the curren...

Страница 21: ...oes not work properly take actions as described in this manual to check out if the meter is defective or not Once defective or malfunctioning is confirmed please contact your local distributor or the...

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