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Copyright

©

 2005 LT. All rights reserved. 

16

„

 

Echo 

 
With ECHO ON, the meter echoes (returns) all the characters whatever it 
receives. To enable the Echo as follows: 
 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Figure- 9 ECHO Setup 

 

„

 

Print

 

only 

 
If the remote interface of the meter is under Print-only mode, the meter will print 
out the measured data when the measuring cycle is completed. The meter will 
auto send the newest data to a host continuously. The meter doesn’t accept any 
commands from the host under Print-Only enabled. The remote indicator of the 
meter will be flashed during operation as Print-only ON. To enable the print-only 
as follows: 
 

 
 
 
 
 
 
 
 
 
 
 
 
 
 

 

Figure- 10 Print-only Setup

Summary of Contents for MD-6520

Page 1: ...MANUAL DE INSTRU ES DO MULT METRO DIGITAL MODELO MD 6520 vers o em Ingl s Leia atentamente as instru es contidas neste manual antes de iniciar o uso do instrumento...

Page 2: ...T 11 POWER ON OPTION 12 HOW TO ENTER SETUP MODE 12 FACTORY DEFAULT 12 BAUD RATE 14 PARITY CHECK 15 DATA BIT 15 ECHO 16 PRINT ONLY 16 PERCENTAGE SCALE FOR 4 20MA OR 0 20MA MEASURING 17 MINIMUM FREQUENC...

Page 3: ...ZERO 36 DECIBEL DISPLAY 37 PEAK HOLD 39 REMOTE COMMUNICATION 41 MULTI DISPLAY MULTIMETER 43 SELECTION BY HZ BUTTON 43 SELECTION BY DUAL BUTTON 45 SHIFT FUNCTION BY BLUE BUTTON 47 HOW TO OPERATE 49 AC...

Page 4: ...ION 72 ENVIRONMENTAL CONDITION 72 WARM UP 72 RECOMMENDED TEST EQUIPMENT 73 SPECIFICATIONS 74 GENERAL SPECIFICATION 74 ELECTRICAL SPECIFICATIONS 76 MAINTENANCE 82 SERVICE 82 BATTERY REPLACEMENT 83 HOW...

Page 5: ...rchasing place immediately A WARNING identifies conditions and actions that may cause hazard s to the user a CAUTION identifies conditions and actions that may damage this Device Following Table 1 exp...

Page 6: ...d leads Disconnect the power and discharge all high voltage capacitors before testing in the resistance continuity and diode function Be cautions when working above 70V DC or 33VRMS and 46 7V peak suc...

Page 7: ...ect combined function for V 2 Press the Dual button momentarily to set frequency measuring on secondary display 3 Connect the INPUT terminals by test leads to the source to be tested Figure 1 Dual dis...

Page 8: ...urement z Battery capacity indication z Brightness LED backlight z Resistance measurement up to 50M z Conductance measurement from 0 01nS 100G 50nS z Capacitance measurement up to 100mF z The scale re...

Page 9: ...w Battery Relative Mode Remote control Dynamic Recording Secondary display units Primary Display units Auto Range Data Hold Manual Trigger Diode Audible continuity Alternating Direct Current 0 20 0 20...

Page 10: ...urning the rotary switch Table 2 Rotary Switch position Position Function 1 2 V 3 V 4 mV 5 Resistance Continuity nS 6 7 TEMP 8 A 9 mA A 10 OFF Figure 3 Rotary Switch for selecting function WARNING Be...

Page 11: ...mit specification ROTARY SWITCH FUNCTION INPUT TERMINAL OVERLOAD PROTECTION V V COM 1000 V R M S V mV 1000V for the circuits 0 3A short circuit Diode Capacitance Temperature A A mA COM 440mA 1000V 30k...

Page 12: ...Re start peak or recording mode Press and hold for more than 1 sec to see battery capacity Press to toggle backlit ON OFF Hz Select Hz and Pulse width tests on Primary display Press and hold for more...

Page 13: ...trigger The sign of will be indicated z Press this button momentarily again to trigger another data hold The sign of TRIG will be flashed before finished or updated measurement z Press this button fo...

Page 14: ...ntarily to change measuring range and re start the PEAK and PEAK measurements after setting the peak mode 6 DUAL Dual Display Combination z Press this button momentarily to select different combinatio...

Page 15: ...The hang belt provides two ways to hang up the meter as follows 1 Hang on the meter to a nail or hook 2 Hang on the meter to the pipe by open button and then fix the belt to pipe Follow below steps to...

Page 16: ...turned off User can configure related parameters on setup mode by following procedures 1 Press LEFT or RIGHT button to select which menu item to be set 2 Press UP or DOWN button to change the paramet...

Page 17: ...F means to disable beep Temperature n1 C Four combinations can be selected 1 C only 2 C F can be selected 3 F only 4 F C can be selected Refresh Hold OFF OFF means Data Hold Manual Trigger set 100 100...

Page 18: ...2005 LT All rights reserved 14 Baud Rate The baud rate is selected for remote control It can be set to 2400 4800 9600 or 19200 Hz To select your request as follows Figure 6 Baud rate setup for remote...

Page 19: ...to none even or odd bit To select the parity as follows Figure 7 Parity Check setup for remote control Data Bit The data bit is selected for remote control It can be set to 8 or 7 bits The stop bit is...

Page 20: ...of the meter is under Print only mode the meter will print out the measured data when the measuring cycle is completed The meter will auto send the newest data to a host continuously The meter doesn...

Page 21: ...0 20mA measuring To set the DC current measuring display with scale readout Set 4 20mA or 0 20mA for proportional to 0 100 The 25 scale readout represents DC 8mA at 4 20mA and DC 5mA at 0 20mA To set...

Page 22: ...ing To set minimum measurement frequency will influence the measuring rate for frequency duty cycle and pulse width measurement Normally the measuring rate defined at general specification is based on...

Page 23: ...9 Beep Frequency The driving frequency can be set for 2400 1200 600 or 300 Hz The beeper can be set to OFF as you want kept silent during operation to select a tone you like according to follows Figur...

Page 24: ...ius only C on primary display 2 Celsius Fahrenheit C F display can be switched by pushing DUAL button 3 Fahrenheit only F on primary display 4 Fahrenheit Celsius F C display can be switched by pushing...

Page 25: ...igger by key BUS trigger by remote control Set OFF for Data Hold Manual Trigger and set 100 1000 variation counts to enable Refresh Hold The variation of measuring value exceed the setting of variatio...

Page 26: ...be disabled To enable this test accompanies with other functions will slight reduce the display updated rate You can know environment temperature with main parameter measurement as enabled environment...

Page 27: ...ion is changed c Dynamic recording is set d 1 ms peak hold is set e Auto power off has been disabled by Setup mode You can turn the rotary switch to the OFF position then turn on again to activate the...

Page 28: ...4 Backlit Display The timer can be set to 1 99 seconds 0FF means to disable turning off backlit automatically The backlight will be turned off automatically after a setting period To set the period as...

Page 29: ...Copyright 2005 LT All rights reserved 25 Decibel Types The Decibel test can be selected for dBV or dBm To toggle the types as follows Figure 19 Decibel Types...

Page 30: ...05 LT All rights reserved 26 Reference impedance for dBm The reference impedance can be set from 1 to 9999 the default value is 600 To set the reference impedance as follows Figure 20 Reference Impeda...

Page 31: ...reserved 27 Reset to Default Push SAVE button for more than one second to reset the optional value to factory default The setup mode will be set to Baud Rate menu item automatically after finished res...

Page 32: ...quency duty cycle and pulse width is indicated on primary display for voltage or current measurement the bar graph is presented for voltage or current value When 4 20mA scale or 0 20mA scale is indica...

Page 33: ...g voltage is exceeded alerting voltage of 1010 0V For your safety please be aware of this alert INPUT WARNING The meter sounds alerting beep when the test lead inserted to A terminal but rotary switch...

Page 34: ...the terminal detected a voltage level more than 3 5V and the rotary switch didn t set to position The meter sounds alerting beep and primary display indicates and flashes CH Err until the lead removed...

Page 35: ...ng figure Figure 24 Capacity check of battery The primary display will indicate existing battery capacity and the battery level is flashing The bar graph is indicated the capacity by percentage for pr...

Page 36: ...nuous mode non data hold or trigger mode The present value is stored to memories of maximum minimum and average also the MAX MIN AVG sign will be lit 2 Press MAX MIN button for more than 1 second to e...

Page 37: ...Copyright 2005 LT All rights reserved 33 Figure 25 Display of Dynamic Recording...

Page 38: ...e 26 Data Hold Operation Press HOLD button for more than one second to exit this mode TRIGGER HOLD Press HOLD button to freeze the displayed value and enter the manual trigger mode and the sign of wil...

Page 39: ...as the operations of Data hold Press HOLD button to enter Refresh Hold mode The present value will be held and the sign of will be lit It will be ready to hold new measuring value once the variation...

Page 40: ...RO The relative function subtracts a stored value from the present measurement and displays the result 1 Press REL button momentarily to set the relative mode This sets the display to zero and stores...

Page 41: ...SHIFT button momentarily to toggle the dBm display on the primary display on AC voltage measurement The bar graph will be indicated AC voltage The dBm display can be selected by push DUAL button Only...

Page 42: ...n one second as dB selected The formula is according to voltage measurement as below Push SHIFT button momentarily to toggle the dBV display on the primary display on AC voltage measurement The bar gr...

Page 43: ...AK button for more than 1 second to toggle peak hold mode ON OFF 2 Press HOLD MAX MIN button momentarily to show peak or peak value after setting the peak mode The display shows MAX to indicate the PE...

Page 44: ...Copyright 2005 LT All rights reserved 40 Figure 32 Peak Hold Display...

Page 45: ...with another file on this CD ROM Please refer to An optional accessory includes an optical USB RS232 cable and a CD ROM for PC application software Please refer following procedures if you want to co...

Page 46: ...metime you may press snap deeply and pull the cable to cause the cover to be moved out as following picture To assemble the cover as contrary direction you moved out Be sure the text side on the cover...

Page 47: ...display on the primary display The bar graph still used to display voltage or current value Press this button again to step through Frequency Duty cycle and pulse width tests This allows simultaneousl...

Page 48: ...Copyright 2005 LT All rights reserved 44 Figure 34 Selecting by Hz button...

Page 49: ...lank or Ambient Temperature V DCV Hz DC coupling dBm or dBV DCV DCV Blank or Ambient Temperature mV DCmV Hz DC coupling dBm or dBV DCmV DCmV ACmV DCmV Blank or Ambient Temperature mV ACm V Hz AC coupl...

Page 50: ...reserved 46 Function Primary display Secondary display A ACA Hz AC coupling ACA DCA ACA Blank or Ambient Temperature Temperature Celsius C Ambient Temperature Fahrenheit F Ambient Temperature Figure...

Page 51: ...tion by Blue Button Function Primary display V ACV dBm or dBV V DCV mV DCmV ACmV Continuity nS CX Temperature CX Environment Temperature Compensation 0 C No ETC A DC A AC A mA DCmA ACmA 0 20 or 4 20 A...

Page 52: ...Copyright 2005 LT All rights reserved 48 Figure 37 Shift mA function by Blue button...

Page 53: ...ount of heat in a resistance as the measured voltage This meter features TRUE RMS readings which are accurate for sine waves and other waveforms with no dc offset such as square waves triangle waves a...

Page 54: ...Copyright 2005 LT All rights reserved 50 Figure 38 Line power Voltage measurement...

Page 55: ...erved 51 DC VOLTAGE MEASUREMENT 1 Set the rotary switch to V 2 Connect the Red and black test leads to V and input terminals 3 Touch the probes to the test points and read the display Figure 39 Check...

Page 56: ...ghts reserved 52 A Measurement 1 Set the rotary switch to A 2 Connect the Red and black test leads to A and input terminals 3 Touch the probes to series connect to the test points and read the display...

Page 57: ...s reserved 53 mA Measurement 1 Set the rotary switch to mA A 2 Connect the Red and black test leads to mA and input terminals 3 Touch the probes to series connect to the test points and read the displ...

Page 58: ...asurement It will optimize the best resolution automatically as below table The RANGE button and bar graph is used for ranging 50mA and 500mA The scale for 4 20mA or 0 20mA is set two ranges as follow...

Page 59: ...ry switch to mA A 2 Connect the Red and black test leads to A and input terminals The meter set to the A measurement automatically when plugged test lead to A terminals 3 Touch the probes to series co...

Page 60: ...momentarily to select Audible continuity Conductance and Resistance measurements The continuity range is set to 0 500 00 While testing continuity the beeper will sound if the resistance falls below 10...

Page 61: ...0 5 0000 k 100 50 000 k 1 k 500 00 k 10 k 5 0000 M 100 k 50 000 M 1 M 1 Set the rotary switch to 2 Connect the red black test leads to and input terminals respectively 3 Touch the probes to resistor o...

Page 62: ...Copyright 2005 LT All rights reserved 58 Figure 45 Resistance measurement...

Page 63: ...tance correspond to extremely high resistance the nS range lets you easy calculate and determine the resistance of components up to 100 G 1 nS 1 000 M 1G 1 Set the rotary switch to 2 Connect the red b...

Page 64: ...Copyright 2005 LT All rights reserved 60 Figure 46 Conductance measurement...

Page 65: ...the positive anode side of the diode and the black lead to the negative side cathode side with band or bands The meter can display diode voltage drops to approximately 2 1 V A typical voltage drop is...

Page 66: ...Copyright 2005 LT All rights reserved 62 Figure 47 Forward Bias of Diode Measurement...

Page 67: ...Copyright 2005 LT All rights reserved 63 Figure 48 Reverse Bias of Diode Measurement...

Page 68: ...curacy of small value capacitors press REL with the test leads open to subtract the residual capacitance of the meter and leads Measuring tip For measuring the capacitor more than 10000 F it suggested...

Page 69: ...Copyright 2005 LT All rights reserved 65 Figure 49 Capacitance measurement...

Page 70: ...Assume number 1 2 and 3 for a TO 92 transistor as following Figure Figure 50 TO 92 Transistor 4 Touch pin 1 by red probe and pin 2 by Black probe If the measuring is OL reverse the probes If the measu...

Page 71: ...6749V 0 6723V EBC PNP 0 6723V 0 6749V CEB PNP Base Pin 1 PIN Probe 1 2 1 3 Pole 123 Vbe Vbc NPN PNP Red Black 0 6749V 0 6723V BEC NPN 0 6723V 0 6749V BCE NPN Black Red 0 6749V 0 6723V BEC PNP 0 6723V...

Page 72: ...1 and pin 2 by red and black probes to get the value Then reverse the probes If the two measuring value is 1k You can assume both pins would be Drain and Source poles The residual pin 3 is Gate pole...

Page 73: ...or this N channel switch Figure 53 N Channel JFET 9 If the RDS increased as the V GS is positive voltage this JFET will be P channel You can set DC power supply voltage output from 0 000V to 15 000V a...

Page 74: ...e operating environment for 1 hour at least z If you want to have quick operation please use the 0 C compensation to see the temperature variation of the thermocouple sensor The 0 C compensation will...

Page 75: ...Copyright 2005 LT All rights reserved 71 Figure 55 Surface temperature measurement...

Page 76: ...ear to ensure that the original designed performance and specifications The meter is designed with closed case calibration capability It shalls calibrate and verify by remote software with appropriate...

Page 77: ...d Source Operating Range Accuracy Required Recommended Equipment DC Voltage Calibrator Range 0 to 1000VDC 0 002 Fluke 5520A or equivalent AC Voltage Calibrator Range 0 to 1000V 100kHz 0 03 Fluke 5520A...

Page 78: ...ring glitch easily z The scale readout for 4 20mA and 0 20mA measurement z Battery capacity indication z Backlit display for easy reading in the dark z Min Max Average Data Hold with Manual or Auto Tr...

Page 79: ...approx The new Ni MH 170mA batteries have been fully charged 80 hours for DC voltage measurement approx Based on new alkaline 9V 545mAH Battery Charging time 135 minutes approx at the environment of...

Page 80: ...he accuracy could be 0 05 5 always use relative function to zero thermal effect short test leads before measuring the signal AC mV V TRUE RMS From 5 to 100 of range Range Resolution Accuracy 30 45 Hz...

Page 81: ...ula is according to voltage measurement and specified reference impedance Its accuracy is depended on the accuracy of voltage measurement and an additional calculation error of 0 3dB should be added 2...

Page 82: ...r two times of measuring time you applied 2 10A continuous and the additional of 0 5 to specified accuracy as measure the signal greater than 10A 20A for 30 seconds maximum After measured current for...

Page 83: ...racy of 500 and 5k is specified after Relative function which is used to substrate the test lead resistance and the thermal effect 4 For the range of 50M the RH is specified for 60 5 The accuracy is s...

Page 84: ...sec Notes 1 Overload protection 1000V R M S for the circuits 0 3A short circuit 2 With film capacitor or better use Relative mode to zero residual 3 Maximum display counts for each range is 11000 coun...

Page 85: ...0 6V 50V 2 5V 5V 5V 6V 500V 25V No Spec 50V No Spec 1000V 50V No Spec 300V No Spec The accuracy for duty cycle and pulse width is based a 5V square wave input to the DC 5V range For AC coupling the du...

Page 86: ...battery and charge or replace battery No beeper tone Check setup mode whether the beeper has been set to OFF Then select the driving frequency you want Failed on current measuring Check Fuse No charg...

Page 87: ...ly as the sign of low battery is displayed and flashing If your meter has specified rechargeable battery inside please go to how to charge battery Following procedures for battery replacement 1 Remove...

Page 88: ...n the battery cover form LOCK to OPEN position by counterclockwise LOCK OPEN OPEN 3 Slide pull down the battery cover See below figure 4 Then take up the cover 5 Replace the specified battery 6 Revers...

Page 89: ...Turn rotary switch to the position Plug power cord to DC adapter 3 Plug the Red banana terminal of DC adapter to and the Black banana terminal of DC adapter to terminals respectively The DC adaptor c...

Page 90: ...o remind you whether to charge battery or not If you want to charge battery just one touch by pushing button to start charging procedures It is suggested never charge the battery as the battery voltag...

Page 91: ...ttery inside 2 Failed battery Figure 59 Error message If such error message occurred check whether the battery is specified one We have done best recognition as possible as we can to prevent wrong bat...

Page 92: ...d will be indicated on secondary display as the charging cycle has been finished The trickle charging current still be provided to keep the battery capacity The signs of and will be cycling display to...

Page 93: ...Copyright 2005 LT All rights reserved 89 Figure 62 Battery charging procedures...

Page 94: ...in following figure 5 Remove the defective fuse by gently prying one end of the fuse loose and sliding the fuse out of the fuse bracket 6 Install a new fuse of the same size and rating Make sure the n...

Page 95: ...nstrument since it may leak into the cabinet and cause damage Do not use chemicals containing benzine benzene toluene xylene acetone or similar solvents to clean the instrument After cleaning make sur...

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