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26

meaning the DC electronic load is waiting for test initiation    or remainingin the suspended mode 

respectively. Please retrigger it so ttesting continues onward.     

After each test is completed, the lower right corner of the VFD display will show either

 PASS

 or 

FAIL

. 

If failure occurs, the buzzer will sound. At this point, initiate the next trigger or press any key to free the load 

from the    pass or fail indication 

              Once the automated test is finished, press the 

▲

 and 

▼

 keys to initiate a manually operated test 

mode. With each key press of the 

▲

 or the 

▼

 keys one time, the DC electronic load will resume the test of 

the previous step or the next step in the sequence. Users can observe the actual state of every step. When 

the ON/OFF key is pressed or a trigger is initiated, the DC electronic load will automatically exit from the 

manuallyoperated test mode and return to the automatic test mode again.

 

4.3 Input Control 

4.3.1 Short Circuit Operation (SHORT) 

        The  DC  Electronic 

Load can simulate a short circuit at the input end by turning the load on with 

full-scale  current.  The  short  circuit  function  can  be  toggled  on/off  at  the  front  panel  by  pressing  the

 

Shift+9(Short)  keys

. 

Short  circuit  operation  does  not  influence  the  current  value  set.  When  the  short 

circuit operation is in 

OFF

 state, the Load will return to its original setting state. 

 

      The  actual  current  value  that  the  load  consumes  in  short  circuit  operation  depends  on  the  active 

working mode and current range of the load.. In CC, CW and CR modes, the maximum short-circuit current 

value  is  1.2  times  the  current  range.  In  CV  mode,  short-circuit  operation  is  identical  to  setting  constant 

voltage to 0V.   

4.3.2 Input On/Off Operation 

When the load input state is 

ON

, pressing the 

On/Off

 key will change the input state to 

OFF

. Now top 

right corner of the VFD display shows 

OFF

. When the load input state is 

OFF

, pressing the 

On/Off

 key will 

change  the  input  state  to 

ON 

state.  Now  the  upper  right  corner  of  the  two  line  display  shows 

SHORT 

indicating the current working state.   

4.4 Electronic Load Operation Range   

      The  DC 

Electronic load operatesin the following range of Rated Current, Rated voltage and Rated 

Power. Please refer to the Diagram 4-13 and Diagram 4-14.   

                                     

 

Diagram 4-13 Electronic Load Power Range 

I

 

V

 

Power Range 

I

 

V

 

 

株式会社ロイノス

Содержание M97 series

Страница 1: ...USER S Guide Programmable DC Electronic Load Model M9711 M9712 M9712B M9712C M9712B30...

Страница 2: ...ii...

Страница 3: ...de 13 4 1 2 Constant Resistance Operation Mode CR 14 4 1 2 1 Setting up a Standard Constant Resistance Mode 15 4 1 2 2 Loading and Unloading Constant Resistance Mode 15 4 1 2 3 Shifting from Constant...

Страница 4: ...tion OV 27 4 5 2 Over Current Protection OC 27 4 5 3 Over Power Protection OW 28 4 5 4 Input Polarity Reversed 28 4 5 5 Over Heat Protection OH 28 4 6 Remote Measurement Function 28 4 7 Battery Testin...

Страница 5: ...lications FEATURES Six high speed operation modes CC CR CV CW CC CV CR CV Over current over voltage over power over heating and polarity reversal protection High luminance vacuum fluorescent display V...

Страница 6: ...1mA 0 1mA 1mA 0 1mA Resolution 0 60A 0 6A 0 15A 0 3A 0 30A 0 3A 0 30A 0 3A Range CC Mode 0 150V 0 500V 0 150V 0 150V Voltage 0 60A 0 15A 0 30A 0 30A Current 300W 300W 300W 150W Power Input Raitng M97...

Страница 7: ...ion 1mV 10mV V Measurement Accuracy 0 015 0 03 FS 0 015 0 05FS Current 0 3A 0 30A Resolution 0 01mA 0 1mA I Measurement Accuracy 0 05 0 08 FS 0 08 0 08 FS Watt 100W 300W Resolution 1mW 10mW W Measurem...

Страница 8: ...4 2 2 DC Electronic Load Dimensional Line Drawings...

Страница 9: ...x The electronic load powers up and the VFD panel displays the firmware revision level EPROM ERROR EEPROM damage or lost data at last power off session 2 Wait for 1s after turning the DC electronic lo...

Страница 10: ...T0 3A 250V M9712C T0 5A 250V T0 3A 250V M9712B30 T0 5A 250V T0 3A 250V 4 Replace the Fuse Open the plastic cover on the rear panel of the DC electronic load with a flat screwdriver See table 3 1 and f...

Страница 11: ...DC electronic load BNC Out connector for 0 full range current that corresponds to 0 10V output An Oscilloscope can be connected here to view dynamic waveforms Remote Measurement terminals and trigger...

Страница 12: ...s the menu choices CONFIG SYSTEM SET LIST AUTO TEST SHORTCUT AND EXIT Select the menu items by pressing the and cursor keys and then press the Enter key to open the menu item you chose Or press the Es...

Страница 13: ...n high range Otherwise it is in low range MAX VOLTAGE SET Setting the maximum Voltage If the maximum voltage set is higher than 20V the load is in high range Otherwise it is in low range MAX POWER SET...

Страница 14: ...MODE Qualification testing mode TEST CURRENT Test Current TEST VOLTAGE Test Voltage TEST POWER Test Power TEST RESI Test Resistance DELAY TIME Test delay time between 0 2 25 5S INPUT xxxx Input the p...

Страница 15: ...nstant Current Mode Press the I SET key and the VFD display will show STANDARD CURR xxxxxxxxA the present constant current value Press the numeric keys and decimal point key to enter the constant curr...

Страница 16: ...e level When the voltage of the power supply under test begins to decrease to the OFFSET unloading value the load will again automatically adjust itself to the open circuit state If the ONSET loading...

Страница 17: ...the soft start CCmode When the VFD display shows Rising TM xxxxxxxxvmS indicating the current rise time usethe numeric keys and decimal point key to enter the current rise time desired Follow by pres...

Страница 18: ...en successfully set into the desired CC value by displaying Unreg means the load could not adjust itself to the selected CC value Check that the unit under test has been connected correctly and powere...

Страница 19: ...sers want to adjustorfine tune the accuracy simply push in on the rotary encoder knob Each click the encoder is rotated movesthe cursor left or right on the VFD screen 4 1 2 2 Loading and Unloading Co...

Страница 20: ...upper right corner of the VFD display will show either CR CV or Unreg CR CV means the load has been successfully set with the selected constant resistance value Unreg means the DC Load could not acce...

Страница 21: ...the VFD display shows the constant voltage value that has been set Should a blinking cursor show up under one of the digits it will require additional tweaking If users wish to adjust the accuracy pu...

Страница 22: ...he DC Load will be in the softstart constant voltage mode If the input state is OFF then the upper right corner of the VFD display will sayOFF Press the On Off key to change the input state to ON Now...

Страница 23: ...maximum output current is within the specified range of the DC Load or at an undercurrent threshold In order to fine tune the constant power value rotate the encoder knob to adjust the value desired...

Страница 24: ...operation enables the DC electronic load to periodically switch between two pre set load levels This function can be used to test the transient characteristics of the LED driver being tested Dynamic t...

Страница 25: ...RISING TM xxxxxxxxmS it indicates the current rise time set from value A to value B Use the numeric and decimal point keys to enter the rise time desired and press the Enter key to confirm Next the D...

Страница 26: ...e triangular wave might function as a square wave there are 0 100 different accuracy steps scaled according to the different rising and falling times set 4 2 5 3 Trapezoidal Wave When set in the Conti...

Страница 27: ...first step and press Enter to confirm When the display shows STEP 1 TM xxxxx mS it indicates the current duration of the first step Press the numeric keys to input the current duration desiredin the f...

Страница 28: ...ess Enter Note step lengths should be a round number between1 50 3 At STEP 1 xxxxx MODE use the and keys to select from the following six working modes then press Enter Working Mode Promp Messages Exp...

Страница 29: ...ys to get to MENU AUTO TEST and press Enter Scroll the and keys to get to SETUP AUTO TEST and press Enter The DC electronic load will be in automatic test trigger output mode There are 4 types of trig...

Страница 30: ...d on with full scale current The short circuit function can be toggled on off at the front panel by pressing the Shift 9 Short keys Short circuit operation does not influence the current value set Whe...

Страница 31: ...M9712 DC electronic load is 150V When any value beyond 150V is input the load will default back to 150V Besides the maximum voltage value input is closely related tovoltage resolution If the maximum...

Страница 32: ...put wattage of the M9712 DC electronic load is 300W When any value beyond 300W is input the load will default back to 300W 4 5 4 Input Polarity Reversed If the DC electronic load has its input polarit...

Страница 33: ...e load is near to zero point and does not change in conjunction with the signal please check that the wire mode matches the parameters of the remote measurement function Please refer to the picture 4...

Страница 34: ...battery being on the threshold value set or at the margin of an insecure state and will stop testing automatically When the load is in test mode you can see the battery s voltage battery discharge cur...

Страница 35: ...3 5 9600 0 004s M97 series programmable DC electronic loads are equipped with two way asynchronous communication with 1 bit fixed as the start bit 8 data bits and 1 stop bit It supports Non parity ch...

Страница 36: ...otocol all the hexidecimal data and the floating point number are fixed in the High Byte and the unfixed data length fields are in the Low Byte In addition the output value of a force single coil must...

Страница 37: ...01 04 CRC Error Check 2 Example The following example reads the load input state ISTATE of the Coil of the slave device as address 0x01 From table 4 8 7 1 below we know that the ISTATE address is 0x0...

Страница 38: ...Query 0x01 0x05 0x05 0x00 0xFF 0x00 0x8C 0xF6 The Correponding Response 0x01 0x05 0x05 0x00 0xFF 0x00 0x8C 0xF6 3 Read Holding Registers 0x03 Read Holding Registers Example Query Field Name Byte leng...

Страница 39: ...ers 2 N CRC Error Check 2 Preset Multiple Registers Example in an Illogical Response Field Name Byte length Example Value Slave Address 1 1 200 Function Code 1 0x90 Abnormal Code 1 01 04 CRC Error Che...

Страница 40: ...escription CMD 0x0A00 1 W R Command Register lower 8 bits logical high 8 bits illogical IFIX 0x0A01 2 W R Constant current register double type UFIX 0x0A03 2 W R Constant voltage register double type...

Страница 41: ...W R LIST serial number register u16 type SERATEST 0x0A33 1 W R Automatic Test serial number register u16 type IMAX 0x0A34 2 W R Current maximum register double type UMAX 0x0A36 2 W R Voltage maximum r...

Страница 42: ...ol Operation Operation Register Value Description Force Single Coil PC1 1 mandatory Table 2 Cancelling remote control operation Operation Register Value Description Force Single Coil PC1 0 mandatory T...

Страница 43: ...IX Double Optional Preset Multi Registers CMD 2 mandatory Table 10 CW mode operation Operation Register Value Description Preset Multi Registers PFIX Double Optional Preset Multi Registers CMD 3 manda...

Страница 44: ...mandatory Table 15 CV loading and unloading mode Operation Register Value Description Preset Multi Registers UFIX Double Optional Preset Multi Registers UCVONSET Double Optional Preset Multi Registers...

Страница 45: ...ister Value Description Preset Multi Registers RFIX Double Optional Preset Multi Registers UCRCV Double Optional Preset Multi Registers CMD 35 Must select Table 20 Battery test mode Operation Register...

Страница 46: ...X Double Optional Force Single Coil REMOTE 0xFF00 0x0000 Optional Preset Multi Registers CMD 41 mandatory 4 9 Remote operation 4 9 1 M 131 or M 133 Communication Cable The DB9 interface connector on t...

Страница 47: ...te operation mode please insure that the baudrate and communication port address of the DC electronic load are the same as that in the PC s softwareor the communication will fail You can change the ba...

Страница 48: ...voltage level so the pin outs of the voltage level shift cable M 131 or M 133 must be set up to match the PC before connecting the DB9 interface with the serial interface on PC M 131 Voltage Level Shi...

Страница 49: ...stry standard RS 232 interface cable between the M97XX and a regular PC will not facilitate communication between the devices The dongle on the M 133 provides the necessary switiching to enable proper...

Страница 50: ...always beware of electric shock hazard Don t use the equipment without regard for personal safety Certification and Warranty M97 Series Electrical Loads are warranted to meet its published technical s...

Страница 51: ...47 Disclaimer Manufacturer reserves the right to make specification s changes to product s and its accompanying documentation at any time and without previous notification to it s customers...

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