B&K Precision 1785B-1788 Power Supply User manual
Contents
1. Connect it to safety earth ground using the wire recommended in the user manual 7 The symbol on an instrument indicates that the user should refer to the operating instructions located in the manual VN High voltage danger Certification and Warranty Certification We certify that this product met its published specifications at time of shipment from the factory Introduction The 1785B 1788 Series power supplies are high performance single output programmable DC power supplies with communication interface The combination of bench top and system features in these power supplies provides versatile solutions for your design and test requirements Convenient bench top features Nice appearance small size and light weight VFD display Soft Rubber numeric keypad e Adjustable amp constant voltage outputs Adjustable amp constant current outputs Output on off High accuracy and high resolution Excellent load and line regulation Low ripple and noise Limit voltage protection Over current temperature protection Sixteen operating states storage May be used in series or parallel modes with additional power supplies The Front Panel at a Glance OANA PED A RO O OO I Jia NANNI 10 digits VFD display Status information for operating mode and working status Power switch Number keys Function keys UP DOWN and ENTER key Output terminals Function keys2. Instruction Manual Version September 2 2009 Model 1785B 1786B 1787B amp 1788 Programmable DC Power Supplies Content COMENDO a a a 2 QUICK RETETCN CS usalo 3 ADOUE VOUT sai 3 Genelalinfomalloisecesla liana 3 Protection from electric SROCK cirillico 3 DEMHON OTUSO nAn E DS RR A OR A S 3 Certification and Warranty i 4 CENMCANON Ss Send di 4 NO QUE O a E RS Nap near NEG Satan SEE ENED Ett OR eEE MEA Ren PERE EOE Ror 4 ine FrOAt Panelat a Giancola ara 5 FUNCUON KEYS COSCO ONS cs assista DOS DE 5 Menu deSCNPHON sa SRS ee 0 O ESG a OSSO SD 6 DIS play annunci ONS di 6 Ene Rear ie anelzat ai Glance assa a Gaia OS Gs ap 7 SAILS MOU CICS LER satana 8 1 Prenminaly GHECK OUT sorena a a coa a a tats eens 8 T2 O Vie US also do 5 ER Mp RR RR NR RD RR RR RR RR RR RR RR 9 1 2 1 vollage QUIPUEGNECKOUF asa E TERETANE 9 1 22 Current Qutput Checkout cassa cisbs lalla lei 9 1 3 If the Power Supply Does Not Turn ON cccccccesseccesseecesssecessseccesseecesseeeesssecessseeeesaees 10 1 4 To Adjust the Carrying Handle sessao sath Snes cues sata SS Ud AS ca aoeaaIR 10 KOTORA CK MOUNT Re INSTRUMENTA iG eariaseeeelnamearaeraseoceeas 11 Chapter 2 SPeCIMCaMONS erene SS A NNA 12 EI OPECINCAION S in a E E ae Unstne enere nner 12 2 2 Supplemental Characteristics simao ela 13 Chapters Fronr panel OperrlioN rrorro Do a 15 3 1 Frontpanel Operation Over VEW secre Dus ariana acetic tactile Dae liana 15 3 2
3. starting on page 16 3 1 Front panel Operation Overview The following section describes an overview of the front panel keys before operating your power supply 1 The power supply is shipped from the factory configured in the front panel operation mode At power on the power supply is automatically set to operate in the froni panel operation mode When in this mode the front panel keys can be used 2 When the power supply is in remote operation mode you cannot use the front panel A change between front panel and remote operation modes will not result in any change in the output parameters You can change the froni panel and remote operation modes by computer 3 The power supply is in Meter mode when it is powered on and the VFD will display the actual voltage and current output value And in this mode if any non functional key is pressed the power supply will changed to Set mode and the VFD will display the adjusted voltage and current value In Set mode the set voltage value will flash you can press A and W keys to adjust the voltage value In Set mode the power supply will turn back to Meter mode if there is no any key is pressed for 3 seconds 4 The output of the power supply can be enabled or disabled from the front panel by pressing key When the output is on the ON annunciator will turn off 5 The VFD display shows the present operating status of the power supply with annunciators For example the power supply is operating
4. supply You should also make sure that the power source you plugged the power supply into is energized Then verify that the power supply is turned on 2 Verify the power line voltage setting The line voltage is set to the proper value for your country 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 was damaged please see the table below to replace the fuse for your power supply Model Fuse Description 1785B Fuse 2 5A T 250V for 220VAC 1786B 1787B Fuse 5A T 250V for 110VAC 1788 Fuse 3 15A T 250V for 220VAC 1 4 To Adjust the Carrying Handle To adjust the position grasp the handle by the sides and pull outward Then rotate the handle to the desired position QOGDG0 DADA Bench top viewing positions Carrying position 10 1 5 To Rack Mount the Instrument You can mount the power supply in a standard 19 inch rack cabinet using the IT E151 rack mount kit Note Remove the carrying handle and the two plastic ears before rack mounting the instrument To remove the handle grasp the handle by sides and pull outwards and rotate it to a special position to let the arrow on the handle and the arrow on the plastic ears be in opposite directions then pull the handle outward After removing the handle you can use a screwdriver to remove the two plastic ears To rack mount a single instrument order rack mount kit IT E151 RE
5. Constant Voltage OPEIALION a asa A DS UE US GE DC 15 3 3 CONSIAREGUIFERLOPereloni anelli 16 3 4 Savng and Recalling Operation lata ao 16 ZSME Operates aa o o O Blend ounak 16 Chapter 4 Remote Operation Mode ii 19 4 1 I ET91Communicalon cable seriale 19 4 2 GOMMUNICIUONSEHANO re ae 19 43 Frame TM aleune il a E E 20 PACKT SUC UTO E E E O a E TETS 20 AE DA KO Kaen eo a E E E N A N 21 2 AC OmmuUNICANONprOLoco eni 23 Chapter S PV 17S5B 1 786 SOMA rar E E NRE ANNER 29 Oe NDOT ON a EAN T E R TAA 29 5 2 OVO te tm EIS LOLA TIO oca E 29 9 9 FUNCIONS OLE VEZ SBT AOS ira cetera leale 29 5 3 COnfigure thne sysiehia ridera 31 GAS GUI Kong gt PORRE RESI 31 5 3 3 Setting Vollage and CUrrent daria 32 0 04 GONG TeSt FUNCION arl aa 34 BeBe DAVE and ODE rental 34 5 3 6 Present Voltage Current Chart i 34 53 Ghart Desceriplon bdiidildicloaiolia a amen un eeaea en 35 Quick Reference About your safety Pease review the following safety precautions before operating our equipment General information The following safety precautions should be observed before using this product and any associated instrumentations Although some instruments and accessories would be used with non hazardous voltages there are situations where hazardous conditions may be present This product is intended for use by qualified personnel who recognize shock hazards and are familiar with the safety pre
6. adequate cabinet ground connection 1 2 Output Checkout The following procedures check to ensure that the power supply develops its rated outpuis and properly responds to operation from the front panel 1 2 1 Voltage Output Checkout The following steps verify basic voltage functions without load 1 Turn on the power supply 2 Enable the outputs keyto let the ON annunciator and the CV annunciator turn on to light f the voltage value flash then the power supply is in Set mode Set mode means that the VFD display shows the setting output voltage and current Or the power supply is in Meter mode Meter mode means that the VFD display shows the actual output voltage and current and the Meter annunciator is lit 3 Check that the front panel voltmeter properly responds to number keys Set some different voltage values then wait till the Meter mode to check if the VFD displayed voltage value is the same as the set voltage value and to check if the VFD displayed current value is nearly zero 4 Ensure that the voltage can be adjusted from zero to the full rated value 1 2 2 Current Output Checkout The following steps check basic current functions with a short across the power supply s output 1 Turn on the power supply 2 Disable the output Press Out on off key to ensure that the output is disabled The OFF annunciator is turned on 3 Connect a short across and output terminals with an insulate
7. at all Itis a good programming practice to set all unused bytes to 0x00 The checksum number is the arithmetic sum of each of the bytes modulo 256 Status packets When you send a command that does not cause the power supply to send requested information back to you you will receive a status packet back The structure of a status packet is Byte O Byte 1 Byte 2 Byte 3 Byte 4 to 24 Byte 25 The meaning of the return status byte is defined below Checksum incorrect Parameter incorrect Unrecognized command Invalid command Command was successful Description 1 Start bit is OxAA occupies a byte 2 Address range is 0x00 to OxFE occupies a byte 3 Command occupies a byte a 0x20 Setting the remote control mode b 0x21 Setting the output ON OFF state c 0x22 Setting the maximum output voltage d 0x23 Setting the output voltage e 0x24 Setting the output current f 0x25 Setting the communication address g 0x26 Reading the present current voltage maximum voltage setup voltage current and operation states of the power supply h 0x27 Enter the calibration mode 0x28 Reading the calibration mode state j 0x29 Calibrate voltage value k 0x2A Sending the actual output voltage to calibration program 0x2B Calibrate current value 21 0x2C Sending the actual output current to calibration program 0x2D Save the calibration data to EEPROM 0x2E S
8. connector on the rear panel of power supply is TTL voltage level you can use the communication cable IT E131 to connect the DB9 interface connector of the power supply and the RS 232 interface connector of computer for the communication Computer side TTILS gt RS232 Cable IT E131 PS side IT E131 communication cable p i IT IT E131 ISOLATED L RS23de gt ISOLATIO p TTL SV i 859666668889942311 CE Ss Note It will not work if you connect the DB9 interface connector of the power supply to the RS232 interface connector of computer directly by a standard RS232 cable Please use IT E131 to connect them 4 2 Communication setting Before using the remote operation mode please make sure that the baud rate and communication address in power supply are the same as in the computer software otherwise the communication will fail you can change the baud rate and communication address from the front panel or from computer 1 Address the range is from 0 to 254 default setting is 0 2 Baud rate 4800 9600 19200 and 38400 are selectable default setting is 4800 3 Databit 8 bit 4 Stop bit 1 5 Parity None 19 Sto PARITY NONE ee 8 Data Bits 4 3 Frame format Packet structure The power supply is programmed using packets of bytes A packet always contains 26 bytes either going to or coming from the instrument The basic programming rule is You send a 26 byte packet to the in
9. in CV mode and then the CV annunciator will turn on If the power supply is remotely controlled the Rmt annunciator will also turn on See Display Annunciators 3 2 Constant Voltage Operation The constant voltage range is from OV to the maximum voltage value of each model It is very easy for 15 you to set the constant voltage output You have 2 solutions to set the constant voltage value Solution 1 Step1 Power on the Power Supply Step2 Press the A and W keys to change the value Solution 2 Step1 Power on the instrument Step2 Press key Step3 Use the numeric keys 0 to 9 or A and V keys to change the voltage value Step4 Press to confirm the value 3 3 Constant Current Operation The constant current output range is from OA to the maximum current value of each type It is very easy for you to set the constant current output Step1 Power on the Power Supply Step2 Press Set key Step3 Use the numeric keys 0 to 9 or use A and W keys to change the current value Step4 Press key to confirm the value 3 4 Saving and Recalling Operation You can store up to 16 different output states in storage register locations 1 to 16 Each output state includes Constant voltage value Constant current value and Maximum output voltage value When shipped from factory storage locations 1 through 16 are empty You can recall the saved settings by Recall function Step1 After you setting an output
10. in the range of Min Amps to Max Amps then the EUT will pass the test the Pass window will appear NE 4 If there is a Real Amps beyond the range in any step the EUT will not pass the test Current Auto Test Recorder Name GONG 8 Manu Naming O Auto Naming a 0 l Clear Actual Value 5 3 5 Save and Open Q sve To save the program settings quickly settings voltage sweep settings and GO NG settings as PAR file To open the PAR file for reloading the program settings quickly settings voltage q a sweep settings and GO NG settings 5 3 6 Present Voltage Current Chart Double click the voltage chart the voltage chart will be enlarged and will display as more details em EE EE te i ue be er nr Pm data dica i ao ma ee el r hi an z m n 3940 3960 3380 4000 4020 4040 o Double click the current chart the current chart will be enlarged and will display with more details 34 0 5 3 7 Chart Description The voltage and current chart can help you to analyze voltage and current changes more easily We take the voltage chart as the example to let you know how to use it The chart window is as follows GOnTETItR O Click here and move to zoom Title Max Min Mean Current 1 2 1 2 1 2 in out axes or scroll axes aee DEE IES Fasce a Bassa a o set the Y Axes Span o set the X Axes Span Ed Vertical marker qua Horizontal marker XY Value marker E Limi
11. lt oO Command 0x25 The new address 5 to 25 byte 26 byte 7 Reading the present current voltage maximum voltage setup voltage current and the states of power supply 0x26 1 byte 2 byte TT ST bri o byte 7 byte Byte 1 of present output voltage 8 byte Byte 2 of present output voltage 9 byte Byte 3 of present output voltage 10 byte Power supply s state 11 byte To set the low byte of current value 12 byte To set the high byte of current value 13 byte Byte 0 of the maximum voltage value 14 byte Byte 1 of the maximum voltage value 15 byte Byte 2 of the maximum voltage value 16 byte Byte 3 of the maximum voltage value 17 byte Byte 0 of output voltage value 18 byte Byte 1 of output voltage value 19 byte Byte 2 of output voltage value 20 byte Byte 3 of output voltage value 21 to 25 byte 26 byte D N D gt Q zR eR t D 4 byte Ff Note 1 We use 4 bytes to represent the maximum voltage value as follows 2 We use 1 byte to represent power supply s state Each bit is defined as follows From higher bit to lower bit E eee 0 bit The output state 0 is OFF 1 is ON 1 bit Over heat protection 0 is normal 1 is abnormal 2 3 bit The output mode 1 is CV mode 2 is CC mode 3 is Unreg mode 4 5 6 bit The fan speed 0 is stop 5 is the maximum fan speed 7 bit Operation state 0 is front panel operation mode 1 is remote con
12. P1 220VAC 10 47 to 63 Hz Option OP2 110 VAC 10 47 to 63 Hz Maximum input power 350VA Cooling Fan cooled 13 Operating Temperature 32 to 104 F 0 to 40 C for full rated output Storage Temperature 68 to 158 F 20 to 70 C for storage environment Environmental Conditions Designed for indoor use in an installation category II pollution degree 2 environment Designed to operate at maximum relative humidity of 95 and at altitudes of up to 2000 meters Weight 12 3Lbs 14 8Lbs 14 8Lbs 14 8Lbs 5 6Kg 6 7Kg 6 7Kg 6 7Kg GW 14Lbs 16 5Lbs 16 5Lbs 16 5Lbs l 6 4Kg 7 5Kg 7 5Kg 7 5Kg Dimensions WxHxD 10 x 4 16 x 15 255 7mm x 105 7mm x 382 7mm 0000 Godo OOOO 0000 56 HII 10000 4299015 Unit mm 14 Chapter 3 Front panel Operation So far you have learned how to install your power supply and do quick start During the quick start you were briefly introduced to operating from the front panel as you learned how to check basic voltage and current functions This chapter describes in detail the use of the front panel keys and shows how they are used to accomplish power supply operation This chapter is divided into the following sections Front Panel Operation Overview on page 14 Constant Voltage Operation on page 15 Constant Current Operation on page 15 Storing and Recalling Operating States on page 15 MENU operation
13. R EEE Li 0000 00 000 0000 0001 To rack mount two instruments side by side order rack mount kit IT E151 you 11 needn t to use the front cover panel Dimension unit mm Chapter 2 Specifications 2 1 Specifications V V V Output Ratings o 5 0 C 40 C Current EA 3 A 0 6 A or Se 0 rated current lt 3 A lt 0 01 3 mV Voltage Load Regulation rated current lt 10 A lt 0 02 5 mV of output offset 001 3 Line Regulation Voltage lt 0 01 3 mV of output offset Current lt 0 1 2 MA Programming Voltage 10 mV Resolution 12 Do ET a 10 mV lt 20 V Voltage Readback Resolution 100 mV 220 V Current 10 mA Voltage lt 0 05 10 mV Accuracy 12months OD 25 C 5C of output offset Current lt 0 2 10 mA ai lt 0 05 15 mV lt 20 V lt 0 05 120 Readback Accuracy oltage 12months mV 220 V 25 C 5 C of output offset lt 01 15 MA Voltage lt 0 5 mVrms 3 mVp Ripple 20Hz 20MHz Current 5 mArms emperature Voltage lt 0 02 5 mV Coefficient 0 C 40 C of output offset lt 0 1 5 mA lt 0 02 15 mV lt 20 V lt 0 02 120 Voltage mV 220 V Coefficient of output offset lt 0 1 15 mA 2 2 Supplemental Characteristics State Storage Memory Sixteen 16 user configurable stored states Recommended Calibration Interval 1 year AC Input Ratings selectable via switch on the rear panel Option O
14. am tools a0 a Fr AppendLine Insert Line DeleteLine will appear on the So tm am t window Click the tools to program the steps AppendLine peetetine Double click on each value to change them from key board as Print you desired Also you can change the time unit hour minute second by clicking on Sec After programming you can select a run mode for your program Run mode includes Once Repeat and Custom Click Run button to send the program settings to the power supply The power supply s output will respond to the program RunTimes O Single Repeat O Custom Click Stop button to stop sending the program settings to the power supply The power supply state will return to the state before the program running 33 5 3 4 GO NG Test Function QuickSet Program ERA EEE GO NG is an auto test function to test if the EUT equipment Ster Setting MaxtA _ tn A Delays Beta under test can meet the specification To use this function 20 1 10 0 90 1 00 follow up the steps below 2 1300 1 10 0 90 1 00 1 Right click on the window the edit tools Append a line Insert E cc a line Delete a line Delete Select etc will appear on the rire window Use the edit tools to edit the test steps Print 2 To set the Voltage Max Amps Min Amps and Delay time according to the specifications of the EUT 3 Click the Run button to start the test If the Real Amps of all steps are
15. cautions required to avoid possible injury Read and follow all installation operation and maintenance information carefully before using the product Refer to this manual for complete product specifications If the product is used in a manner not specified the protection provided by the product may be impaired Before performing any maintenance disconnect the line cord and all test cables Protection from electric shock Operators of this instrument must be protected from electric shock at all times The responsible body must ensure that operators are prevented access and or insulated from every connection point In some cases connections must be exposed to potential human contact Product operators in these circumstances must be trained to protect themselves from the risk of electric shock If the circuit is capable of operating at or above 1000 volts no conductive part of the circuit may be exposed Definition of users Responsible body is the individual or group responsible for the use and maintenance of equipment is operated within its specifications and operating limits and for ensuring that operators are adequately trained Operators use the product for its intended function They must be trained in electrical safety procedures and proper use of the instrument They must be protected from electric shock and contact with hazardous live circuits Service is only to be performed by qualified service personnel Safety symbols and terms
16. change the value Also you can use mouse wheel Page Up Down keys and arrow keys f from the keyboard to change the current value more slightly The setup value will be displayed on the second line indicator Note Before you set the current and voltage value from the computer please change the operation mode to PC Control mode by pressing aE button 2 Quickly setting QuickSet Program GO NG Hotkey e 002 00A 20 Modify Voltage Current 5 004 008 6 004 2 00A r 001 70A o DC AO 80A 3 0070 304 10 001 004 Self Control Hot Key Right click each Hotkey Button it will display as Modify Voltage Current Click Modify Voltage Current it will display as follows change the voltage current value as you desired then click OK button to confirm Hotkey sx x 32 VoltageSweep perme NN Voltage Sweep To set voltage sweep For example StartValue 1V Stop Value 12V Voltage Step 0 5V Forme jr VottageStep_ 0 5 TimeDelay 2s When you click the Run button the voltage _ will change according to the voltage sweep setup value Delay P 5 display as follows then you can click Stop button to stop the voltage sweep lt lt ps k 3 Program setting QuickSet AutoTest TestProgram Min Time Is 300mSec Step Voltge v Current Times 1 1 00 0 50 1 00 E sno na Program Right click on the Program area the progr
17. d test lead Use a wire size sufficient to handle the maximum current Warning To satisfy safety requirements load wires must be heavy enough not to overheat when carrying the maximum short circuit output current of the power supply If there is more than one load then any pair of load wires must be capable of safety carrying the full rated current of the power supply 4 Enable the output key to ensure that the output is enabled The OFF annunciator is turned off 5 Adjust the voltage value to 1 0 volt Adjust the voltage to 1 0 volt to ensure the power supply is in CC operation mode The CC annunciator will turn on 6 Adjust the current value Set some different voltage values then wait till the Meter mode to check if the VFD displayed current value is the same as the set voltage value and to check if the VFD displayed voltage value is nearly zero 7 Ensure that the current can be adjusted from zero to the full rated value 8 Turn off the power supply and remove the short wire from the output terminals 1 3 If the Power Supply Does Not Turn On Use the following steps to help solve problems you might encounter when turning on the instrument If you need more help refer to chapter 6 for instructions on returning the instrument to the supplier for service 1 Verify that there is AC power to the power supply First verify that the power cord is firmly plugged into the power receptacle on the rear panel of the power
18. description Set the output voltage value Set the current value Save the present settings to a specified register location 1 16 Recall a saved settings from location 1 through 16 Recall Menu function to set related parameters of the power supply Output ON OFF to enable disable the output uton 0 Menu description gt MAX VOLT Set the maximum output voltage value Menu gt INIT OUT Initiate the output state to ON or not gt INIT VOL Initiate the output voltage to 0 volt or not vo vo vo DIAZ iii i any key e rr ere RATE o Yv icati o yv o y gt ADDR Set the communication address gt KEY LOCK Set the password for function keys gt EXIT Display annunciators output is off mode mode IS Not used The instrument IT E131 IT E132 IT E133 state The only active key is the Local KEY Shift Notused Error The instrument has error __ o nemaje pe state state password The Rear Panel at a Glance man Al e Na mm i LISA LTS AZ TA t DS gt ma Cooling window DB9 interface connector 110V 220V selector Fuse Power socket Chapter 1 Quick Start One of the first things you will want to do with your power supply is to become acquainted with the front panel The exercises in this chapter prepare the power supply for use and help you get familiar with some of its front panel operations Thi
19. ed for future use Good programming practice is to set these bytes to 0x00 Some commands require two byte and four byte integers to represent parameter settings These integers are stored in the command packet in little endian format Little endian is a byte ordering format in which bytes with lower addresses have lower significance We will refer to the individual bytes as follows For a two byte integer the least significant byte will be called the low byte and the most significant byte will be called the high byte For a four byte integer we will use the following notation Least significant two bytes least significant byte Least significant two bytes most significant byte Most significant two bytes least significant byte Most significant two bytes most significant byte 22 As an example for the integer 0x23A749F5 we d have 1 byte 0xF5 Lower low byte 2 byte 0x49 Lower high byte 3 byte OxA7 Higher low byte 4 byte 0x23 Higher high byte 4 4 Communication protocol 1 Setting the remote control mode 0x20 3 byte Command 0x20 4 byte Operation mode 0 represent front panel operation mode 1 represent remote operation mode 5 to 25 byte Note You cannot control the power supply from the front panel when the power supply is in calibration mode 2 Setting the output state ON OFF 0x21 3 byte Command 0x21 4 byte Output state 0 is OFF 1 is ON So 25 bye 26 byte 3 Setting t
20. er supply will initiate the output to OFF state when the power supply is powered on If you select OFF the output will remain the same state as last time you turned off the power supply Note Default selection is ON and the output state is always OFF state MB Initiating the Output Voltage gt INIT VOLT This instruction can set the initial output voltage If you select ON the power supply will initiate the output voltage to OVolt when the power supply is powered on If you select OFF the output voltage will remain as the same volts as the last time you turned off the power supply Note Default setting is ON and the output voltage is 0 volt E Setting the Key Sound gt KEY SOUND This instruction can switch on off the buzzing sound when you press any key If you select ON the buzzer will sound when any key was pressed If you select OFF the buzzer will not sound when the keys were pressed Note Default setting is ON the buzzer will sound when you press any key E Setting the Baud Rate gt BAUDRATE This instruction can change the communication baud rate for the power supply the baud rate 17 range is 4800 9600 19200 or 38400 Before the communication you must make sure that there is same baud rate between the power supply and the computer Note Default baud rate is 4800 m Setting Address gt ADDRESS This instruction can set the communication address for each power supply The address range is from 0 to 30 Be
21. eserve 25 byte 20 byt 16 Reading calibration information 0x2F Start bit OxAA Address 0x00 0xFE Command OF 4 to 23 byte Calibration information ASCII code 2a bye 25 byte System reserve 17 Reading product s model series number and version information 0x31 Start bit OxAA Address 0x00 OxFE Sannin Ot Note For example the serial number is 000045 the product model is 1785B and software version is V2 03 then the returned data is as follows AA 00 31 36 38 31 31 oo os o2 zz zz zz zz zz zz zz zz zz zz xx xx xx xx xx 57 18 Restore the factory default calibration data 0x32 Start bit OxAA Command Oa 4 to 25 byte 26 byte 19 Enable the local key 0x37 Start bit COXA Address 0x00 0xFE 3 byte Command 0x37 Enable disable local re O is disable tis enable 5 to 25 byte to 25 5 to 25 byte SYSTEM reserve reserve 26 byte Check sum code 28 Note The local keys on the front panel are not allowed to use when the power supply is in remote mode If the local key was enabled user can press the numeric key 7 to change the remote mode to front panel operation mode and all local keys will work 20 The return information of command operation in power supply 0x12 Start bit OxAA Address 0x00 OxFE Command Oxi2 4 byte Command checkout result 5 to 25 byte 25 byte N
22. etting calibration information 0x2F Reading calibration information 0x31 Reading products model series number and version information 0x32 Restoring the factory default calibration data 0x37 Enable the local key 0x12 The return information of command operation in power supply Tn OGD oo 3 Note You must change the power supply to remote control mode first then you can control the power supply output by computer The command for remote control is 0x20 If you want to calibrate the power supply set the calibration information If you want to set the product serial number you must set the calibration protection mode to OFF state first The command for calibration protection is 0x27 When the power supply is in calibration mode changes for the output state of power supply are not allowed 4 4 to 25 bytes are information content 5 26 byte is check sum the sum of the former 25 bytes Command Details In the following sections we abbreviate the details of the commands Since the first three bytes of a command are i the constant OxAA ii the instrument address and iii the command we will not show those for each command In addition the 26th byte the checksum will also not be shown The table includes a column for Byte offset This is the zero based index of the byte in the packet Note the offset numbers are in decimal A table entry of Reserved means the data are currently unused or reserv
23. fore the communication you must make sure that there is same address between the power supply and the computer Note Default address is 0 When the power supply receives a frame instruction from computer the LINK indicator will light on it means that the power supply started to communicate with computer If the power supply hasn t received the signal from computer for 3 seconds the LINK indicator will be turned off and it means that the power supply can not communicate with computer Hm Setting password for function keys gt KEY LOCK This instruction can set a password 1 through 4 digits to lock the function keys operation After setting the password all the function keys on the front panel will be locked except the OUT on off key You must enter the correct password to unlock them then you can continue to do the function key operation If you don t want to lock the function keys please don t press any number key when you enter the gt KEY LOCK instruction just press ENTER key to unlock it Note When shipped from factory there is no password and function keys are unlocked The start bit of your desired password shouldn t be 0 18 Chapter 4 Remote Operation Mode The DB9 interface connector on the rear panel of the power supply can be transferred to RS 232 interface the following information will tell you how to use the computer to control the output of the power supply 4 1 IT E131 Communication cable The DB9 interface
24. he maximum output voltage 0x22 Start bit OxAA Address 0x00 0xFE 23 Command 0x21 4 byte The lowest byte of voltage upper limit 1 represents 1 mV 5 byte The lower byte of voltage upper limit 6 byte The higher byte of voltage upper limit 7 byte The highest byte of voltage upper limit 8 to 25 byte 26 byte Note Suppose you want to set the maximum voltage to 16 23 V Since 1 represents 1mV therefore 16 23 V translates to 16 230 in decimal With 4 bytes in Hex that would be 0x0003F 66 Since the bytes are ordered in little endian format 0x66 would be the 3 byte 0x3F the 4 byte 0x00 as 5 byte and 0x00 as the 6 byte 4 Setting the output voltage 0x23 Start bit OxAA_ Address 0x00 0xFE 8 to 25 byte Systemreserve ess s 5 Setting the output current 0x24 Siart bi KAR Address 0 00 0xFE Command 0x24 4 byte To set the low byte of current value 1 represents 1 mA To set the high byte of current value a to 26 byte 20 byte Note Suppose you want to set the maximum current to 3 12 A Since 1 represents 1 mA 3 12 A translates to 3 120 in decimal With 2 bytes in Hex that would be 0x0C30 Since the bytes are ordered in little endian format 0x30 would be the 4 byte and 0x0C as 5 byte 6 Setting the communication address 0x25 24 v Start bit OXAA The current address of power supplv 0x00 0xFE Command 0x25 lt
25. l the status bar will display as follows Power Type 6831 DO Power Supply Communication Successtul Model number Ly Communication status 1 Model number it will display the real part number of the field power supply which detected by the computer 6811 6812 6821 6822 6823 2 Communication status Communication successful Communication waiting if Communication waiting appears here for more than 10 seconds you need to check if there is any connection failure between computer and power supply After confirming the effective connection then re configure the baud rate address comport etc to make sure the same baud rate and address between power supply and computer 31 5 3 3 Setting Voltage and current 1 Setting voltage current by rotary knob Present value 16 5 el Ua 4 3 DE ff i 24 8 Setup Value 10 204 E a You can use the an 230 House wheel Arrow or Page Up Down key to change the setup value Present Value ao 29 Setup Value I MI i Pd a You can use the O 0 31 or Page Up Down key to change the setup value TI Mouse wheel Arrow Use mouse to click on the rotary knob and move mouse to change the value You also can use mouse wheel or Page Up Down keys and arrow keys f gt from the keyboard to change the voltage value more slightly The setup value will be displayed on the second line indicator Use mouse to click on the rotary knob and move mouse to
26. ote When the power supply receives a frame command it will check the frame command if the check sum is correct then it will return to 0x80 if there is any error on setting parameter or over parameter then it will return to OxA0 if the command wasn t executed then it will return to 0xBO if the command isn t effective then it will return to OxCO Or otherwise it will return to 0x80 Chapter 5 PV1785B 1788 Software 5 1 Introduction Software PV1785B 1788 is control software for IT1785B 1788 series programmable power supply It can work with all single output power supply models Please make sure that you purchased communication cable and use it to connect the power supply and computer before the communicating This software can accomplish all the functions of the power supply such as setting constant voltage setting constant current max voltage etc Also you can make quickly settings or make a program for the output voltage and current by the computer In addition PV1785B 1788 offer a GO NG test function for automatic factory testing It brings you much convenience when you use the power supply 5 2 System Installation 1 Requirements for the computer Pentium Ill or Pentium IV processor based personal computer Windows 98 2000 XP or Windows NT4 0 2 Insert the CD Rom which supplied with the instrument to the CD driver and install the software step by step according to the instructions 5 3 Functions of PV 1785B 1788 Start the
27. p K Precision Corp B amp K Precision Corp 22820 Savi Ranch Parkway Yorba Linda CA 92887 www bkprecision com 714 921 9095 Include with the returned instrument your complete return shipping address contact name phone number and description of problem LIMITED ONE YEAR WARRANTY B amp K Precision Corp warrants to the original purchaser that its products and the component parts thereof will be free from defects in workmanship and materials for a period of one year from date of purchase B amp K Precision Corp will without charge repair or replace at its option defective product or component parts Returned product must be accompanied by proof of the purchase date in the form of a sales receipt To obtain warranty coverage in the U S A this product must be registered by completing a warranty registration form on our website www bkprecision com within fifteen 15 days of purchase Exclusions This warranty does not apply in the event of misuse or abuse of the product or as a result of unauthorized alterations or repairs The warranty is void if the serial number is altered defaced or removed B amp K Precision Corp shall not be liable for any consequential damages including without limitation damages resulting from loss of use Some states do not allow limitations of incidental or consequential damages So the above limitation or exclusion may not apply to you This warranty gives you specific rights and you may have other righ
28. rent value the setup value and measurement value will be displayed To make a program of voltage and current values for the power supply or to set the output value quickly Using the rotary knob to set the voltage value the setup value and present value will be displayed in the 2 indicators O 000 30 5 3 1Configure the system The first step for communication is to configure the system click Configure button com the windows will display as follows 1 Comm to set the communication port baud rate and address 2 Max voltage to set a maximum voltage value in the voltage range For example the voltage range of IT6822 is 0 32V then you can set a maximum voltage at 24V 3 Voltage Current step to set the step size of Arrow key page up down key and Mouse wheel When you set the value by clicking the knob you can use the arrow keys t page up down keys or mouse wheel Has voltage 13 007 Reload last system parameter Play sound for test pass a to adjust the value more slightly Play sound for test fail 4 Reload last parameter if you select it then it will reload the parameter settings of last time you close this software Note When you set the communication port please make sure that the baud rate and address of the computer are the same as the power supply 5 3 2 Status bar Status bar will give you the communication information When the communication is successfu
29. s chapter is intended for both the experienced and the inexperienced user because it calls attention to certain checks that should be made prior to operation 1 1 Preliminary Checkout The following steps help you verify that the power supply is ready for use 1 Check the list of supplied items Verify that you have received the following items with your power supply If anything is missing contact your nearest Sales Office O One power cord for your location O This User s Manual O Communication cable 2 Connect the power cord and turn on the power supply When you turn on the power supply the front panel display will light up briefly while the power supply performs its power on self test All tte VFD annunciators will light up at once To review the display with all annunciators you can check if there is any stroke loss on any annunciator If there isn t any response when you power on the power supply please see Section 1 5 on page 10 for some service information If the EEPROM was damaged or the latest operation data in EEPROM was lost the VFD will display as follows RR EEPROM If the calibration data in EEPROM was lost the VFD will display as follows RROR CAL Warning Your power supply is equipped with a 3 wire grounding type power cord the third conductor being the ground The power supply is grounded only when the power line cord is plugged into an appropriate receptacle Do not operate your power supply without
30. software PV1785B 1788 the windows is as follows 29 null E Aaqa Va ue Program AutaTest DE llotKey i 3 00 1 50A 0 004 0 0CA Stlup value 4 8 14 3 Ee 2 001 504 0 000 004 3 00 Vv se Nie SED C Died 6 000 104 0 00 0 00A he whel Arrow ct Page NAS aber 6 001 504 22 00V0 504 e SERENE VYullaguSweup iJ t 25 _ 76 Setup Value StopValue f 2 v 61 640 x VoltageStep 0 5 y Z x Ncte Ycu can use Mouse co 101 wheal arrow ct Daze up dovm key ta chong the Delay S 0 valia 20 40 6 80 100 E FC Control Output Gn Local Enable mi mu OT a CC mm Px Fanel Conto Output Gif _ Local Disable gal Unros Em TX All control options mustbelar PC Cortrol modd 6831 DCPower Supply 00 De D Configure the software operation environments 2 Voltage chart it can show you a chart of the voltage 3 Current chart it can show you a chart of the current 4 To set the remote mode of power supply 5 To set the output state ON OFF 6 To enable the local numeric key it means that if you select Enable on this button when the power supply is under remote control mode you can press numeric key to change the control mode to front panel control mode Annunciators display Status bar it can show you the power supply model communication status and operation status To set current value use the rotary knob to set the cur
31. state CV value CC value and Maximum voltage press Save key Step2 Use the numeric keys 0 to 9 or A and W keys to select the memory location the range is 1 to 16 which you want to store in Steps Press Enter to confirm the memory location Step4 Press Recall key Step5 Use numeric keys 0 to 9 or A and WY keys to select the states which you want to recall Step6 Press Enter key to confirm Then the saved settings will come on Note 1 If the function keys were locked by password you need to enter the correct password after you press function keys V set I set Save Recall and Menu then you can do the settings 2 If you want to cancel a function operation V set I set Save Recall or Menu just press Eso key to exit 16 m Set Maximum voltage gt MAX VOLT Please be well known that the Max voltage value should be in the range of each type of Power supply Step1 Press key Step2 Select gt MAX VOLT by using A and V key Step3 Press key Step4 Change the voltage value by using numeric keys 0 to 9 or Aand Y key Step5 Press key Note After you setting the maximum voltage value the output voltage setup should be in the range from 0 volt to maximum voltage The default maximum voltage is the full voltage range of its model m Initiating the Output state gt INIT OUT This instruction can initiate the output state when the power supply is powered on If you select ON the pow
32. strument You then read a 26 byte packet back from the power supply to either e Get the status of your submitted packet or e Get the data you requested The following are conventions we will follow in this chapter 1 Hexadecimal integers will be represented by the prefix Ox 2 Numbers are in base 10 number system unless otherwise indicated 3 Byte numbering is zero based meaning numbering starts with 0 The structure of each 26 byte packet is Byte 0 Byte 1 Byte 2 Byte 3 to 24 Byte 25 Command s data Checksum Thus the first byte of any command packet or returned packet is always OxAA Address must be a byte that is between 0x00 and OxFE Setting of the address is optional It is not required to communicate with the instrument The address can be set from the front panel and is stored in non volatile memory This feature is useful when communicating via USB and connecting several instruments e g via a USB hub In this scenario Windows assigns a virtual COM port to each device which is unknown prior to establishing communications with the instrument could be different each time In this case the user can correlate each virtual COM port randomly assigned by Windows with a user defined address Command is a byte that identifies which power supply command is used 20 The area for the command s data contains parameter information for the command or the data that is requested via a previous command Some commands have no data
33. t range between the minimum value and maximum value dd Scroll axes mode Tel Zoom in out axes mode Zoom out A Zoom in Save the chart as a BMP file Clear all data b Resume tracking Auto scale Print the chart SI Zoom rectangle 35 SERVICE INFORMATION Warranty Service Please go the support and service section on our website www bkprecision com to obtain a RMA Return the product in the original packaging with proof of purchase to the address below Clearly state on the RMA the performance problem and return any leads probes connectors and accessories that you are using with the device Non Warranty Service Please go the support and service section on our website www bkprecision com to obtain a RMA Return the product in the original packaging to the address below Clearly state on the RMA the performance problem and return any leads probes connectors and accessories that you are using with the device Customers not on an open account must include payment in the form of a money order or credit card For the most current repair charges please refer to the service and support section on our website Return all merchandise to B amp K Precision Corp with pre paid shipping The flat rate repair charge for Non Warranty Service does not include return shipping Return shipping to locations in North America is included for Warranty Service For overnight shipments and non North American shipping fees please contact B am
34. trol mode 3 The frame format is the same as above 8 Entering the calibration mode 0x27 Calibration password 0x28 Calibration password 0x01 Trio 25 bye 26 byte Note We use a byte to represent calibration protection state each bit is defined as follows from higher bit to lower bit EGEO eee 0 bit Protection state 0 is to disable protection 1 is to enable the protection 9 Reading the calibration state 0x28 yt Calibration protection state 10 Calibrating the voltage value 0x29 Start it OxAA Address 0x00 OxFE Command 0x29 Calibrated voltage points point 1 3 5 to 25 byte 26 byte Note To calibrate the 3 points of voltage sequentially 26 11 Sending the present output voltage to calibration program 0x2A Command Ox2A The byte O of present voltage value 12 Calibrate the current value 0x2B Start bit OxAA Note To calibrate the 2 points of the current value sequentially 13 Sending the actual output current to calibration program 0x2C Start bit OxAA Sanita O 2 byte 3 byte byte 5 byte SI to 25 byte 26 byte 14 Save the calibration data to EEPROM 0x2D 1 byte 2 byte Address 0x00 OxFE 3 byte Command 0x2D a0 26 byte 26 bis 15 Setting calibration information 0x2E Start bit OxAA Address 0x00 0xFE Command 0x2E 27 4 to 23 byte Calibration information ASIC code System reserve 24 byte System r
35. ts which vary from state to state B amp K Precision Corp 22820 Savi Ranch Parkway Yorba Linda CA 92887 www bkprecision com 714 921 9095 36 22820 Savi Ranch Parkway Yorba Linda CA 92887 www bkprecision com 2008 B amp K Precision Corp Printed in China v090209 37
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