USER MANUAL
Contents
1. 121 and USB IT E122 interface LPS 305B TC Chapter 1 Quick Start 1 1 The front panel and rear panel description 1 1 1 Front panel Figure 1 1 1 VFD display 2 Rotary knob 3 Power Switch Local and Shift keys 4 Numerical and Esc keys 5 Function keys 6 Cursor position keys Output terminals USER MANUAL B LPS 305B TC 1 1 2 Rear panel i cc CAT LL HI ES Y Re TTI 9 Figure 1 2 1 Ventilation holes 2 TTL connector port 3 110V 220V AC Power selection switch 4 AC power inlet and Fuse compartment Note The TTL connector port is not the same as a RS232 interface Please do not connect directly to RS232 port on PCs to avoid damage to the unit This connector port can only be used with B K Precision Taiwan s optional interfaces LPS 305B TC 1 1 3 Dimension The dimension of LPS305B TC is as shown in the figure below ZII jS esaet Unit millimeter mm Figure 1 3 1 2 Preliminary Check The following steps will help you verify that the power supply is ready for use 1 2 1 Check the list of supplied items Verify that you have received the following items with your power supply If anything is missing please contact B K Precision Taiwan 1 Power cord 2 User manual 3 lest report 1 2 2 Connect the power cord and turn on the power supply After power up the instrument will automatically per2. Within warranty period the user should be responsible and cover respective expense to transport the troubled or damaged product to B K Precision Taiwan Inc or the place which B K Precision Taiwan Inc specify B K Precision Taiwan Inc will bear the expense in delivering the fixed product back to user User shall cover for any transporting insurance from the insurance company alone lf the product is returned from countries for maintenance other than the original country the customer should pay for the round trip freight duties and all associated fees USER MANUAL i LPS 305B TC Notice The contents of this manual are subject to change without notice Introduction B K Precision LPS 305B TC offers three clean reliable outputs for general purpose applications It delivers 0 30 5V on two outputs and 0 5 5V on one output Each output can be operated independently and can be connected in series or parallel to produce larger voltage or current required Excellent stability high precision and high resolution up to 10mV 1mA are features that make LPS305B TC ideal for R amp D schools and production lines The main features are as follows Programmable triple outputs Simultaneous display of triple output voltage and current Low ripple low noise 27 store memory and recall function VFD display 1 2 2U compact size Digital encoder knob and keypads function Key Output on off control LVP OVP and OTP protection Optional RS232
3. USER MANUAL Triple Output Programmable DC Power Supply Model LPS 305B TC Ver1 0 MAR 2013 LPS 305B TC LPS 305B TC SEIRI OF UA HO NT c 3 SA RES KAMBO ESHA NDA 3 CERTIFICATIONAND OUALITYASSURA Nna 4 is Ms 4 2 a Gp er E EET TEE 5 Sara TAF Ta eee TS 6 1 1 THE FRONT PANEL AND REAR PANEL DESCRIPTION ii 6 FTG eie ives 6 leke near DO PR 7 UASI DIMENS ON IA FRI Y RR RT AANT 8 ie PRE MINA CHEC de Er MR 8 1 24 Check the listo supplied TIGITIS AE 8 Te lr OWE ONDO C ING Cr ce cu liceale 8 Wi OV Ol B Tell TOS ST w RYN NYFFRYN EN FN DR HF RR FY EN Y FF FWYN 8 CULO UL VC RIC AOI YN Y NY ON YF AD YU DA AFU 10 1 2 5 Irthe power supply does nob Turn ea 11 120 HOW TO place ITO TU SQ reino tend USE ee oO te in cad e Un ue E 11 1 2 7 How to adjust the carrying 12 CHAPTER 2 SPECIFICATION Leoluca lesi 13 ZA ezsise TM C 13 2 2 OUBPEEMENTAbAOHARAOTERISTIOS Mea d mne esu utet Rua a du tad E POT M LIE 14 CHAPTERS FRONTERANELOPER ATIO Ni allea 15 3 1 FRONT PANEL OPERATION OVERVIEW biella lalla 15 3 2 PANEL DESCRIPTION lilla A Y a tm Duct 16 9 VPD DESCRIPTION ettam eta n tum o 17 SA MENU DESCRIPTION i TN TT 17 0 S PANEGOPERZI Lele 17 0 5 lChanpel Operaibi celle 17 39 2 clelia 18 iOS DCL VO
4. front panel operation is disabled and only Meter and Local buttons are enabled If the power supply is in remote mode pressing the o Local Key allows you to revert to manual mode The output of power supply can be enabled disabled from the front panel by pressing the key When you turn on the output the VFD will display the state and voltage current of each channel CC represents constant current mode and CV represents constant voltage mode When output is in OFF mode the VFD will have no indicators of CC or CV mode The VFD displays operation states and error information m the power supply is in remote mode When front panel keys are locked key will be lit For more details please refer to 3 3 VFD Description The knob can be used for modifying parameters at Set mode or selection in menu operation When Ose Cleset Recall Meter or COn Off keys are lit they are selected for setting Pressing Shift and CRecalD Save will flicker and you may enter a number to specify memory location When V SET I SET keys are lit the following conditions will enable the cursor position to flash 1 Pressing V SET I SET buttons again 2 Adjusting the knob 3 Pressing arrow keys Note If there is no operation on the front panel within 5 seconds the cursor position will 15 LPS 305B TC cease to flash automatically You can also disable the cursor by pressing the ESC key 3 2 Panel D
5. 3 Connection diagram for Off states Ser Series mode This function configures the connection of CH1 and CH2 to serial mode in menu operation To select series mode press Shift to access the Menu and use the AV keys to enter the COUP subpage Use 4 P io select SEr and press to confirm The VFD wil display SEr SUCC followed by the display below after 2 seconds USER MANUAL LPS 305B TC under Output Off state and in Meter selected mode To exit menu selection simply press 0 00V Ser Figure 3 4 Figure 3 5 Wiring diagram for Series mode Par Parallel mode This function configures the connection of CH1 and CH2 to parallel model To set parallel mode press Shift to access the Menu and use the A V keys to enter the COUP subpage Use 4 P io select PAr and press to confirm The VFD wil display PArA SUCC followed by the display below after 2 seconds under Output Off state and in Meter mode To exit menu selection simply press 23 LPS 305B TC 0 00 0 00V cenni Figure 3 6 Figure 3 7 Wiring diagram for Parallel mode Default settings for Series and Parallel connection After selecting series function CH1 and will be set to default values automatically OV and 3 1A The same applies to selecting parallel function default values are and 6 2A Limit voltage for Series and Parallel connection If limit volt
6. C lt 0 5 30mV lt 0 2 15mA lt 0 2 30MmV lt 0 2 25 27 sets 214 55mm W x 88 2mm H 354 6mm D Table 2 1 13 7 4 kg LPS 305B TC 2 2 Supplemental Characteristics Recommended Calibration Interval 1 year AC Input Ratings selectable via switch on the rear panel Option 01 220V AC 10 47 to 63 Hz Option 02 110V AC 10 47 to 63 Hz Max input power Model LPS305B TC Table 2 2 Cooling Fan cooled Operating Temperature 0 to 40 C for max rated output Storage temperature 20 to 70 C Environmental conditions Indoor use only max humidity 80 no condensation USER MANUAL LPS 305B TC Chapter 3 Front Panel Operation So far we have covered the quick start chapter which briefly introduced the front panel operation and how to check basic voltage and current functionality This chapter describes in detail how to operate the instrument manually via the front panel keys 3 1 Front panel Operation Overview The power supply is shipped from the factory ready for front panel operation Set mode At power on the power supply will automatically enter the Set mode and the instrument can be controlled via the front panel keys and knob THE VFD will display the set voltage and current The power supply enters remote mode as soon as a valid remote command is received via the communication connector in the rear Switching to remote mode does not impact the supply s output parameters In remote mode
7. replace at its option defective product or component parts under normal operation B K Precision Taiwan Inc does not take the repair free responsibility to any one of the following situations and will charge repair fee in accordance with the maintaining situation 1 2 3 4 5 6 7 8 9 The product is not sold directly by B K Precision Taiwan Inc s formally authorized distributor Because the irresistible calamity or force majeure which may attribute to the user who has not followed the User Manual to operate or caused by user s fault such as malfunction or damage made from improper operation or others User dismantles repairs repacks the product or installs additional accessories without B K Precision Taiwan Inc s permission or authorization which cause trouble or damage of the product User incorrectly or improperly repairs the product User uses his or her own software or interface Unauthorized modification or improper usage of the product User operates assembles or repairs the product in environments and locations outside the allowable ambient environment and location User uses his or her own equipment or installs his or her own circuitry causing damages The instrument s model number or serial number has been modified erased removed or made illegible 10 Damages caused by accidents including but not limited to lightning strike water damage fire abusive use negligence etc
8. 305B TC 1 2 7 How to adjust the carrying handle To adjust the position grasp the handle by the sides and pull outwards to rotate the handle Once you have reached the desired position push the handles in There are three possible configurations as shown below Benchtop Configurations Hand Carry Configuration Figure 1 12 USER MANUAL LPS 305B TC Chapter 2 Specification 2 1 Specifications Parameters Output Ratings 0 C 40 C Load Regulation of output offset Line Regulation of output offset Programming Resolution Readback Resolution Programming Accuracy Within 12 months 25 C 5 C of output offset Readback accuracy 25 5 C of output offset Ripple and Noise Temperature Coefficient 0 C 40 C of output offset Readback Temperature Coefficient of output offset Series Accuracy Parallel Accuracy Weight Voltage Current Voltage Current Voltage Current Voltage Current Voltage Current Voltage Current Voltage Current Normal Mode Voltage Normal Mode Current Voltage Current Voltage Current Voltage Current Voltage Current Save Recall LPS305B TC 0 30 5Vx2 0 5 5Vx1 0 2 0 lt 0 02 4mV lt 0 2 3mA lt 0 01 3mV lt 0 2 3mA 10mV 1mA 10mV 1mA lt 0 06 20mV lt 0 2 10 lt 0 06 20mV lt 0 2 10 lt 1mVrms 5mVp p lt 6mArms 250ppm C 250ppm C 250ppm C 250ppm
9. LVP value 19 LPS 305B TC 3 5 7 Key lock function Press Shift ENED Lock to lock the front panel keys At this point CEnteM key will stay lit Using this function will disable all keys except 000 4 P arrow keys and o Local key Note Pressing the keys will allow you to control the output state of the channels without the use of a Shift key Pressing 4 P arrow keys and Local key will allow you to switch between channels 3 5 8 Protections Over Temperature Protection OTP If the internal temperature of the power supply exceeds 85 C the instrument will protect itself by automatically turning the power OFF When this happens you will hear a buzz sound with the following VFD display OVER HEAT Figure 3 2 Over Voltage Protection OVP OVP may be triggered at the event of an internal error wrong operation or excessive external voltage Once over voltage is detected the user will hear a buzz sound and the output will be turned off automatically At this point the VFD will display OVP in the voltage value position and at current value position The OVP value is 0 1V higher than the existing LVP value set 3 6 Menu Item Descriptions Press Shift CES Menu to enter menu operation Menu Items OUt Set output states OFF Sets output to Off at power on LASI Remember the output state before the last power off rP bEEP Set key sound OFF Disable key
10. NIG anali ae si HD Tn 18 ILE a QN NN Lm 19 3 9 Recall Operation leale 19 3 5 6 IMI voltatde Protection EVE a a RR dydd Cd gd iter tas det ette curb ete Dott iS de ae 19 TUNCTION E A n 20 Te NOD Sau cn aD IM I M M d M 20 9 o MENUITEM DESCRIPTIONS cecidit tutus Ru elica asi 20 4 1 COMMUNICATION BETWEEN POWER SUPPLY AND eene nenne ener entren nnns eerte 27 4 1 1 121 communication module RS232 to TTL i 27 4 1 2 122 communication module USB to TTL i 27 4 2 COMMUNICATION BETWEEN POWER SUPPLY AND YY LE LILI ELLI LLEIAF LLALL LLALL ELLYLL ELLYLL LLID FFF nno 28 USER MANUAL 2 LPS 305B TC Safety Information Please review the following safety precautions before operating our instrument General information Please do not install replacement parts in the instrument or perform any unauthorized modification Please send the instrument to B K Precision Taiwan s maintenance department for maintenance and for ensuring its security features Please refer to the manual for specific information on warnings or precautions to avoid personal injury or instrument damage The instrument does not have parts that the users can replace or perform maintenance by themselves If maintenance service is required please contact our company s trained service personnel Security regulation To prevent electric shock a non authorized personnel
11. ONIC TEST INSTRUMENTS PRECISION TAIWAN INC Addr 3F No 250 Sec 3 Beishen Road ShenKeng Dist New Taipei City 22204 Taiwan Tel 886 2 77416699 Fax 886 2 77416686 http www bkprecision com tw e mail bktaiwan bkprecision com tw
12. age of CH1 and CH2 are set as 20V 25V before series or parallel connection The voltage range will be 45V sum of the two channels after connect in series The voltage range will be 20V min value of the two channels after connect in parallel TRAC sync output setting This track function sets CH1 and CH2 in synchronous mode You may first set a proportion to which you want CH2 to track CH1 When change is being made to one of the parameters voltage current of CH1 the same parameter of CH2 will change accordingly in proportion For example set voltage current of CH1 and CH2 as follows CH1 4V 1A CH2 8V 2A Press Shift to access the Menu and press V to select trAC the VFD will USER MANUAL a LPS 305B TC display as follows trAC OFF ON Figure 3 8 Select ON by pressing gt key followed by and the VFD will display tr AC SUCC After two seconds later the system will automatically exit the Menu When output is off and in Meter status VFD will display 0 00V 0 00V TRA TRA A Figure 3 9 In setting status if voltage of CH1 is set as 2V voltage of CH2 will automatically sync to 4V in proportion To turn off the track function simply set the TRAC function under menu to OFF status Note If either the voltage current of CH1 CH2 is set to zero before turning on the track function the voltage current synchronization of CH2 to CH1 will be ignored To verify that you have properly selected t
13. e up to a total of 27 different setups COUP This parameter configures the connection mode of CH1 and CH2 The possible setups in the menu include OFF SEr Series and PAr Parallel LPS 305B TC only supports Series Parallel mode for CH1 and CH2 in menu operation When the mode has been selected the VFD will display SEr or PAr under CH2 At these modes the user only needs to set the total voltage and current on one channel the power supply can distribute the voltage and current to the two channels automatically 21 LPS 305B TC Note When configuring for series or parallel mode the user must wire the terminals externally to match the configuration See Figure 3 5 and 3 7 The power supply does not automatically connect the appropriate terminals internally based on the configuration selected Note After configuring the instrument for series or parallel operation the output state of CH1 and CH2 will automatically be set to OFF and the voltage value will be OV Therefore the user would have to set the parameter again after reconfiguration Additionally Save and Recall functions will be disabled However the voltage current and output states of CH3 will not be affected by the Series or Parallel mode selection Off This setting turns off series or parallel operations for CH1 and CH2 Press to confirm this selection the VFD will display OFF SUCC Below you may find the connection diagram for Off state Figure 3
14. escription Shift l CH On Off Local Save O CRecat Meter d P Power Lock O V LVP Menu Figure 3 1 0 9 Numerical keys With Shift key keys 1 3 can be used to control the output state of each of the 3 channels Note In key Lock mode this function is disabled Jump out of the current setting or menu item Shift Modifier key Local Switch to Local operation mode from Remote mode or switch to different channels Power on off the power supply V set yp oet the voltage or Shift V SET to set LVP value Menu Set the current or Shift I SET to enter Menu operation Recal lt Save Save or recall setup in memory locations Switch the display between Set value and Actual value Enter Lock Confirm the selection or setting Shift Enter to Lock the front keys On Off Control the output state of each channel Hight Left arrow key move the cursor or scroll through the menu items Up down arrow key increase or decrease the setting value Shift 1 Turn on the output of corresponding channel regardless of USER MANUAL a LPS 305B TC Shift 2 Shift 3 whether you are in Menu operation or Meter mode Table 3 1 3 3 VFD Description CC Constant current mode CV Constant voltage mode Remote control operation Indicates that shift button has been pressed Indicates the channel currently selected Serial connection mode Paral
15. form a self test routine In the event that there is no response when you turn on the power supply refer to 1 2 5 for additional information 1 2 3 System self test USER MANUAL i LPS 305B TC After power on the front panel display with automatically perform a self test and the following should be displayed Figure 1 4 Followed by Y 10 00V 11 00V 3 00V 0 000A 0 000A 0 000 Figure 1 5 The first row is the output voltage for channels 1 3 and the second row is the output current of each channel pointing at CH1 means that you can set the current and voltage value of Channel 1 To switch to other channels press the Local key In case the self test routine is not successful you may see one of the following VFD displays If EEPROM is damaged the following will be displayed EEP Err Figure 1 6 If the last operation data which should be stored in the EEPROM is lost you will see Syst Lost Figure 1 7 During channel scan the following will be displayed Scan Chan Figure 1 8 When checkout for one channel failed you will see Scan Chan Chan Lost Figure 1 9 When the calibration data of one or more channels is lost you will see LPS 305B TC Scan Chan Cal Lost Figure 1 10 If the factory calibration data of one or more channels is lost you will see Scan Chan Fact Lost Figure 1 11 1 2 4 Output verification The following procedures verify that the power supply outputs the correct
16. he track function you may check if Figure 3 9 displays under Meter on status and output is turned off When track function is not turned on letters trA will not appear in display Note The track function is bound by the LVP Limit Voltage Protection value set by the user Power Supply Information To display information of your DC Power Supply press Shift i keys and the following information will appear on your display Press 4 keys to navigate through the pages 1 Model and Software Version INFO LPS 3056 1 XX 25 LPS 305B TC 2 Serial Number information INFO SN XXXX XXXX XXXX 3 Calibration Date INFO XXXX XX XX 4 Calibration Time INFO 2 XX XX XX USER MANUAL 20 LPS 305B TC Chapter 4 Communication between Power Supply and PC 4 1 Communication module introduction The DB9 connector Figure 4 1 in the rear panel of the power supply provides a TTL level signal It can be connected to a standard PC interface via 121 RS232 to TTL or IT E122 USB to TTL isolated communication module This chapter describes what connection is needed to control the output of the power supply via the computer Figure 4 1 Note Please do not connect your computer to LPS 305B TC with standard 9 Pin RS232 cable it may cause damage to the power supply 4 1 1 121 communication module RS232 to TTL The DB9 interface connector on the rear panel of LPS 305B TC power supply provides a TTL vo
17. is strictly prohibited to open the instrument Additionally use in life support systems or any other device with security requirements is strictly prohibited We are not liable for any direct or indirect financial damage or profit loss that might occur when using the instrument Safety symbols and terms Warning This product should only be used as intended Users must be trained in electrical safety procedures and proper use of the instrument Users must be protected from electric shock and contact with hazardous live circuits Please observe the following precautions before using this product to avoid any instrument damage Notes It reminds the user of some operating procedures practices conditions and other matters that may result in instrument damage or data loss D Connect it to safety earth ground using the wire recommended in the user manual The symbol on an instrument indicates that the user should refer to the operating instructions located in the manual High voltage danger LPS 305B TC Certification and Quality Assurance LPS 305B TC programmable DC power supply fully meets all of the technical specification in the manual Warranty B K Precision Taiwan Inc warrants to the original purchaser that its products and component parts thereof will be free from defects in workmanship and materials for a period of one year from the date of purchase During this year B K Precision Taiwan will without charge repair or
18. lel connection mode trAC Tracking mode Table 3 2 Explanation of annunciators on the display co v SEr Ud 3 4 Menu Description Press Shift Eset Menu to enter menu operation The flashing parameter indicates the current selected setup Use the lt gt keys to change the setup and AV keys to scroll through the menu items Press key to enter the selected menu function Press to jump out of the Menu Note Both pressing and V keys allow you to access the next menu item however pressing key saves the selected setup while pressing V key does not 3 5 Panel Operation 3 5 1 Channel operation When Oset or Cleset key is lit press Local key to switch between the three 17 LPS 305B TC channels 3 5 2 Output On Off setting Pressing key toggles the output state of all 3 channels of the power supply If the output state is ON pressing this key will turn the output state to Off If the output state is Off pressing the key will turn the output state to On To control channels individually press Shift Shift O Shift corresponding to each channel Shift controls the output state of the first channel e Shift 2 controls the output state of the second channel O Shift controls the output state of the third channel When the power supply is in remote mode you can set the output state by sending SCPI command OUTPut ON OFF The On Off operatio
19. ltage level interface Use the communication module IT E121 along with a standard RS232 straight through cable to connect DB9 interface connector of the power supply to the 5232 interface connector of the PC IT E121 communication module Power supply Connect to DB9 connector of Power Supply PC Connect to RS232 Port of PC Figure 4 2 4 1 2 IT E122 communication module USB to TTL The DB9 interface connector on the rear panel of LPS 305B TC power supply provides a TTL voltage level interface Use 122 communication module along with a standard USB straight through cable one end is B connector and the other end is A connector to connect 27 LPS 305B TC DB9 interface connector of power supply to the USB interface connector of PC IT E122 communication cable PC Connect to USB Port of PC Power supply Connect to DB9 connector of Power Supply Figure 4 3 4 2 Communication between Power Supply and PC Using 121 or IT E122 you may connect the DB9 interface connector of LPS 305B TC to RS232 or USB interface connector of PC for remote control Before putting the instrument into remote operation please make sure that the baud rate on the power supply and PC side are identical otherwise communication would not be possible Baud rate 4800 9600 38400 can be selected under Menu USER MANUAL ae LPS 305B TC BK ae RA GAIA i ELECTR
20. n does not affect other parameters Note The key controls the output state of all 3 channels simultaneously If you want to control the output state of each channel press ONShift 0 0 keys individually 3 5 3 Set Voltage There are three ways to change the voltage value Method 1 Press 9 Local to select channel press C V set then enter a numerical value followed by C Enter Method 2 Press C V set then press 4 keys to move the cursor position and adjust the voltage value using the knob Press g or to exit Method 3 Press CV set gt then press 4 keys to move the cursor position and adjust the voltage value using AV keys Press 6 or to exit Note When output is at off state and is at on state the rotary knob and AV keys cannot be used to adjust the voltage and current USER MANUAL Bs LPS 305B TC 3 5 4 Set Current There are three ways to change the current value Method 1 press o Local to select channel press Cleset D then enter a numerical value followed by Method 2 Press C set_ then press lt gt keys to move the cursor position and adjust the current value using the knob Press g to exit Method 3 Press C set_ then press lt gt keys to move the cursor position and adjust the current value using AV Press 69 io exit 3 5 5 Save and Recall Operation You can store up to 27 different setups in memory locations 1 through 27 They are divided into three groups each group con
21. sound ON Enable key sound bAUd Set baud rate Baud rate 4800 9 6 _ _ Baud rate 9600 Baud rate 38400 G Select memory group for Save function oave to group1 USER MANUAL a LPS 305B TC Save to group2 Save to group3 Configure ouput mode between CH1 and CH2 Channel 1 and 2 outputs independently Configure for series operation Configure for parallel operation Set the tracking mode for CH1 and CH2 trAC Disable tracking function Enable tracking function Table 3 3 Out This item sets the output On Off state at power up If you select Last the power supply will save the output state prior to the last power off and revert to that state at power up If you select Off the output state is always Off when the power supply is turned on The recommended setting is Off Beep This item enables or disables the beep key sound When enabled you will also hear two beep sounds when the output switches between CV and CC mode BAUD This item configures the baud rate for serial communication Possible values are 4800 9600 and 38400 When operating the power supply in remote mode make sure that you configure identical baud rate settings for the power supply and the computer Grp This parameter sets the memory groups for Save Recall operation The non volatile memory location is divided to three groups Grp1 Grp2 and Grp3 Each group can save nine different setups The user can sav
22. taining nine different setups Each setup consists of a voltage value current value and a maximum output voltage value Press DShift Becalb Save followed by a number key to save the current operating state to non volatile memory Press Recall number keys 1 to 9 to recall operating state assigned to this location You can also use the SCPI command SAV RCL to save and recall When Save operation is done there will be a corresponding display to indicate successful or failed operation For Recall operation display will only show failed operation Note The power supply doesn t support Save Recall operation when in Series Parallel or Tracking mode If you use Save Recall function during Series Parallel or Tracking mode VFD will display INV OPEr invalid operation reminding the user of wrong input If parameters recalled do not exist the current value position on VFD will display and then resume to previous display after 2 seconds 3 9 6 Limit Voltage Protection LVP Limit voltage protection is the maximum voltage value set by the user for each channel Press Local button to select the channel then press Shift SES LVP and the VFD will display LVP with flashing values beneath it You can use number keys arrow keys and the knob to enter the LVP value Press g to exit the operation After setting a LVP value whenever user sets a voltage value above the LVP the instrument will automatically jump to the
23. urrent value wait until the instrument is in METER mode then make sure that the displayed current value actual output value is the same USER MANUAL a LPS 305B TC as the set value 12 Make sure that the current can be adjusted from 0 to the full rated value 13 Disable the output and then remove the test lead 14 Check the other two channels by the same method 1 2 5 If the power supply does not turn on Use the following steps to help resolve the problems you might encounter when turning on the instrument 1 Verify that there is AC power applied to the power supply Verify that the power cord is firmly plugged into the power receptacle on the rear panel of the power supply Make sure the power outlet you are using is working properly and verify that the power supply is turned on 2 Verify the power line voltage setting Make sure the voltage selector switch is set according to the present line voltage 110VAC or 220VAC Change the voltage setting if it s not correct 3 Verify that the correct power line fuse is installed If the fuse is damaged please replace it according to the table below Fuse 3 15A 220V AC LPS 305B TC Fuse 6 30A 110V AC Table 1 1 1 2 6 How to replace the fuse Open the small plastic cover below the power supply s input socket on the rear panel with a screwdriver you should see the fuse already in it Please replace using a fuse according to the specification shown in the table above LPS
24. voltage and current levels and properly responds to entries from the front panel Voltage Output Check The following steps verify basic voltage functions without load 1 Press Power key to turn on the power supply 2 Press key to enable the output Note When key is not lit the power supply is in SET mode which means that the VFD displays the set values for voltage and current When the key is lit then the power supply is in METER mode the actual voltage and current will be displayed on the VFD 3 Check that the front panel voltmeter properly responds to numerical key entries Enter a different voltage value and wait a few seconds until the METER mode activates Verify that the actual output value voltage is identical to the set value Also verify that the displayed current value is close to OA 4 Make sure that the voltage can be adjusted from zero to the maximum rated value 5 Check the other two channels by the same method Current Output Check The following steps verify the basic current functions by shorting the power supply s output 6 Press Power key to turn on the power supply 7 Press to disable the output ensure that the output is OFF as shown in Figure 1 5 8 Connect the and output terminals of channel 1 with a short insulated test lead Use a wire size sufficient to handle the maximum current 9 Adjust the voltage value to 3V 10 Press to enable the output 11 Adjust the current Enter a different c
Download Pdf Manuals
Related Search