B&K Precision 1685B 1687B 1688B Switching DC Power Supplies
Contents
1. Return value 030201450 OK Indicates voltage reading is 3 02 V and current reading is 1 45 A Power supply is in CV mode Input command GETM CR Return value 015015 025025 035035 OK Indicates preset 1 voltage and current is 1 5 V and 1 5 A preset 2 voltage and current is 2 5 V and 2 5 A preset 3 voltage and current is 3 5 Vand3 5A Input command RUNMO CR Return value OK CR Sets voltage and current using values from memory location 1 Command code amp Return value Input command SOUT lt output gt CR Return value OK CR Input command SOVP lt voltage gt CR Return value OK CR Input command SOCP lt current gt CR Return value OK CR Input command GOVP CR Return value voltage CR OK CR Output On Off control lt output gt 0 1 0 ON 1 OFF Set upper voltage limit of power supply lt voltage gt 000 XXX Set upper current limit of power supply lt current gt 000 XXX Get upper voltage limit of power supply voltage 000 XXX 29 Input command SOUT1 CR Return value OK CR Switches output OFF Input command SOVP151 CR Return value OK CR Sets upper voltage limit to 15 1 V Input command SOCP108 CR Return value OK CR Sets upper current limit to 10 8 A Input command GOVP CR Return value OK Indicates upper voltage limit is set to 15 2 V Command code amp Return value Input comm2. PC Software General Functions and Display 21 5 2 2 External Timed Program External Timed Program is completely controlled by the PC The PC counts the step time and changes the specified voltage and current levels of the power supply z Rating 60V SA Description Voltage 12 0v dl Current 5 004 dl ec A RL V O DH y A 5004 ka XS Table Name Untitle z Table Description OUTPUT o o Running Cycle 0 Description Lola External Timed Program Internal Preset Memory Data Log Setting Step Voltage Current Minute Second Dutput On 1 05 0 2 00 00 10 2 10 0 2 00 00 10 3 15 0 2 00 00 10 4 0 0 0 00 00 00 5 0 0 0 00 00 00 6 0 0 0 00 00 00 7 0 0 0 00 o0 00 8 0 0 0 00 00 00 9 0 0 0 00 00 00 10 0 0 0 00 00 oo 11 0 0 0 00 00 00 12 0 0 0 00 00 oo 13 0 0 0 00 00 00 14 0 0 0 00 00 00 15 0 0 0 00 00 00 16 0 0 0 00 00 00 17 0 0 0 00 00 00 18 0 0 0 00 00 DO Run Clear Table Max 60 54 MaxC 6 804 Now Sampling 35 UYL DD UCL 6 84 Ver 0 6 Figure 8 External Timed Program External Timed Program Procedure 1 Select External Timed Program tab to switch to the External Timed Program function 2 Enter voltage current and time parameters for number of steps needed in timed program Maximum of 20 steps can be entered 3 Specify desired number of running cycles Up to 999 running cycles can be entered Enter 0 for continuous cycle
3. To save the table enter Table Name in box and click Save Table icon Data of different groups of presets can be classified stored exported to a csv file printed or retrieved for use at any time 7 To delete all data in the table click the Clear Table button 23 5 2 4 DataLog The Data Log window can be used to view present or stored output dat a All parameters at the bottom of the window can be changed via direct entry from the PC and confirmed by pressing Enter or selecting the values from the drop down menu z Rating 60V 5A Co CE fae Description External Timed Program Internal Preset Memory Data Log Setting Voltage 10 0y d Current 2 004 dl V SETTING AE Y const 00 O E H A coo 4 Eb R OUTPUT o o xs Log Name Untitle y Log Description V Mm oy AV Max 20V y CMin 0 04 y CMax 2 04 lw Min jow Zi Vw Max 50W y T Min Jos Z T Len 1805 v Description Max 60 54 MaxC 6 804 Now Sampling 35 UVL 60 54 UCL 6 84 Ver 0 6 Figure 10 Data Log Window Parameters in Data Log V Min Minimum voltage level V Max Maximum voltage level C Min Minimum current level C Max Maximum current level W Min Minimum power level in watts W Max Maximum power level in watts T Min Time minimum T Len Time length 24 To save a data log enter Log Name in box and click the Save Log icon After saving the log c
4. aaae a ea E a A aTa 34 Certification t oii cds 36 Service Information cn nnnn cnn nn cnn nnanna cnn 37 Limited Two Year Warranty ii 38 2 Introduction B amp K Precision models 1685B 1687B and 1688B are laboratory grade switching mode DC power supplies with high current output in a small form factor and lightweight package The 1685B Series provides various configurations of output voltage and current and make setting voltage and current levels fast and precise through its dual action coarse fine rotary encoder control knobs In addition to its constant voltage CV and constant current CC modes the high efficiency DC power supply offers a unique solution with its preset and analog remote control modes Save up to three different presets of voltage and current values for quick recall The analog remote control function allows the output power voltage and current to be adjusted without touching the front panel of the power supply These features make the 1685B Series suitable for a wide range of applications including production testing telecommunications R amp D service and university labs Features e Automatic CV CC crossover operation e Lightweight and compact e Rotary encoder control for precise voltage and current setting e Save up to 3 user defined voltage and current presets for quick recall e PC software for remote control and external timed programming e Analog remote control function e USB interface
5. and replacing components Under certain conditions even with the power cable removed dangerous voltages may exist To avoid injuries always disconnect power and discharge circuits before touching them DO NOT SERVICE OR ADJUST ALONE Do not attempt any internal service or adjustment unless another person capable of rendering first aid and resuscitation is present DO NOT SUBSTITUTE PARTS OR MODIFY THE INSTRUMENT Do not install substitute parts or perform any unauthorized modifications to this instrument Return the instrument to B amp K Precision for service and repair to ensure that safety features are maintained WARNINGS AND CAUTIONS WARNING and CAUTION statements such as the following examples denote a hazard and appear throughout this manual Follow all instructions contained in these statements A WARNING statement calls attention to an operating procedure practice or condition which if not followed correctly could result in injury or death to personnel A CAUTION statement calls attention to an operating procedure practice or condition which if not followed correctly could result in damage to or destruction of parts or the entire product WARNING WARNING CAUTION CAUTION Do not alter the ground connection Without the protective ground connection all accessible conductive parts including control knobs can render an electric shock The power jack and mating plug of the power cable meet IEC safe
6. 4 Torun the timed program click the Run button 5 To save the table enter Table Name in box and click the Save Table icon The timed program table data can be classified stored exported to a csv file deleted printed or retrieved for use at any time 6 To delete all data in the table click the Clear Table button 22 5 2 3 Internal Preset Memory The Internal Preset Memory tab allows you to define the power supply s presets remotely EZ Rating 60V SA Description Extemal Timed Program Internal Preset Memory Data Log Setting A Select Preset Voltage Current Voltage 10 0Y d Current 2 004 dl Ze 1 10 0 2 00 C 2 15 0 2 50 O 3 v SETTING e 3 20 0 3 00 V const 00 gaue 26 B 6 ui OUTPUT o o HG SS Table Name Untitle Table Description Set Read Fro PS Clear Table Description Max 60 5 MaxC 6 804 Now Sampling 35 UVL 60 5 UCL 6 84 Ver 0 6 Figure 9 Internal Preset Memory Internal Preset Memory Procedure 1 Select Internal Preset Memory tab to switch to the Internal Preset Memory function 2 Enter in desired Voltage and Current values for Presets 1 2 and 3 3 Click Set to select and save Presets 4 To get power supply s currently stored presets click the Read from PS button 5 Retrieved data will be shown in red if they exceed the present preset upper voltage and current limit value 6
7. BK EFCIMA NJ ree ViVi WEED 1685B 1687B 1688B Switching DC Power Supply INSTRUCTION MANUAL 1 Safety Summary The following safety precautions apply to both operating and maintenance personnel and must be observed during all phases of operation service and repair of this instrument Before applying power follow the installation instructions and become familiar with the operating instructions for this instrument GROUND THE INSTRUMENT To minimize shock hazard the instrument chassis and cabinet must be connected to an electrical ground This instrument is grounded through the ground conductor of the supplied three conductor ac power cable The power cable must be plugged into an approved three conductor electrical outlet Do not alter the ground connection Without the protective ground connection all accessible conductive parts including control knobs can render an electric shock The power jack and mating plug of the power cable meet IEC safety standards DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE Do not operate the instrument in the presence of flammable gases or fumes Operation of any electrical instrument in such an environment constitutes a definite safety hazard KEEP AWAY FROM LIVE CIRCUITS Instrument covers must not be removed by operating personnel Component replacement and internal adjustments must be made by qualified maintenance personnel Disconnect the power cord before removing the instrument covers
8. age and current steps External Timed Programming Max 99 min 59 sec step time Max 999 running cycles Operating Temperature 32 F to 104 F 0 C to 40 C lt 80 R H Dimensions WxHxD 7 9 x 3 5 x 8 2 200 x 90 x 208 mm Weight 5 2 lbs 2 4 kg Power cord instruction manual application software Supplied Accessories PE CD USB cable remote control connector Note All specifications apply to the unit after a temperature stabilization time of 15 minutes over an ambient temperature range of 23 C 5 C Specifications are subject to change without notice To ensure the most current version of this manual please download the latest version here http www bkprecision com search 1685B For current up to date product information please visit www bkprecision com 35 8 Certification CE Compliant CE Declaration of Conformity The power supply meets the requirements of 2006 95 EC Low Voltage Directive and 2004 108 EC Electromagnetic Compatibility Directive Low Voltage Directive EN60950 1 EN 61010 1 EMC Directive EN 55011 EN 55022 EN 55024 EN61000 3 2 EN61000 3 3 EN61000 6 1 36 9 Service Information Warranty Service Please go to the support and service section on our website at www bkprecision com to obtain an RMA Return the product in the original packaging with proof of purchase to the address below Clearly state on the RMA the performance pr
9. an be retrieved by selecting it in the Log Name drop down menu Data logs can be classified stored exported to a csv file printed or retrieved for use at any time THE TIME FRAME CONCEPT OF DATA LOG The data logging function starts when the software begins to run When T Min is set to 0 seconds it means the data is in real time and the length of time lapsed is on the left hand side of the Time Minimum T Len is the length of time lapsed starting from the Time Minimum Both parameters are adjustable so that any time period of the log can be displayed for analysis In the figure below T Min is set to 10 seconds and T length to 120 seconds The display shows the output data starting at 0 seconds ago and ending at the 130 second mark o o 1305 Mai 60 54 Mast 6 804 Now Sampling 35 UVL 606v UCL 6 84 Verg 0 6 Time Minimum Time Length Figure 11 Time Minimum and Time Length 25 5 2 5 Settings Use this tab to configure your settings Rating 60V 5A robe a Description External Timed Program Internal Preset Memory Data Log Setting Voltage 10 0 ell Current 2 004 el V SETTING COMM Port Com3 e 0 3 Y const 00 O E y A 200 A Data Log Sampling Time 35 Y E W Voltage Upper Limit UVL Setting 60 54 hi OUTPUT o o Current Upper Limit UCL Setting 6 84 Default OK Description Max 60 5Y Maat 6 804 Now Sampling 35 UVL 60 54 UCL 6 84 Ver 0 6 F
10. and Get upper current Input command GOCP CR limit of power supply GOCP CR Return value current 000 XXX Return value current CR OK CR OK Indicates maximum current limit issetto5 2A Input command Get power supply Input command GMAX CR maximum voltage and GMAX CR current values Return value Return value voltage current CR lt voltage gt 000 XXX 180200 CR OK CR lt current gt 000 XXX OK CR Indicates maximum voltage is 18 0 V and maximum current is 20 0A 30 6 Faults and Troubleshooting 6 1 OVP Overvoltage Protection This unit has a built in tracking overvoltage protection feature In the event of the output voltage becoming greater than the set value see specified range from Specifications section protection will be triggered and the output power will be cut off OVP warning will appear as shown below REAR CONTROL Figure 13 Overvoltage Protection To reset the warning switch off the unit and remove all connected devices Switch the unit back on again and it should resume normal operation If the problem persists please contact B amp K Precision 6 2 OTP Overtemperature Protection There is a thermo sensor inside the unit to monitor and prevent the unit from getting too hot When OTP is triggered there is no output and the following warning will appear on the LED display 31 REAR CONTROL Figure 14 Overtemperature Protection When you get this wa
11. ase 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 rights 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 38 Page intentionally left blank BK ESCIMAJ MAIDA 22820 Savi Ranch Parkway Yorba Linda CA 92887 www bkprecision com 2012 B amp K Precision Corp Printed in Hong Kong v032212
12. e Front panel auxiliary output e Overvoltage overtemperature and overload protection 3 Controls and Indicators 3 1 Front Panel VOLTAGE CURRENT REAR PUSH FINE COARSE PUSH FINE COARSE Figure 1 Front Panel 1 LED panel meter display with CV CC indicator 2 Rear Control Indicator lights up when using Preset Remote Control Set mode 3 Output Voltage Control Knob control main and auxiliary output voltage 4 Output Current Control Knob control main and auxiliary output current limit 5 Power ON OFF Switch 6 Auxiliary Output Terminal max 5 A Note Please see Section 4 1 4 for more details on using both main and auxiliary output terminals together 3 2 7 8 9 10 11 12 13 Rear Panel Remote Control Figure 2 Rear Panel Main Output Terminal max 5 A for 1685B 10 A for 1687B 20 A for 1688B Note Please see Section 4 1 4 for more details on using both main and auxiliary output terminals together Mode Selection Switch Normal Preset Remote Control Set Modes Recall Preset Selection Switch Analog Remote Control Terminal Cooling Fan Air Intake Grille AC Input Plug and Fuse Compartment USB Port for PC remote control 4 Operating Instructions Safety Precautions e This power supply is for indoor use only e Do not expose the power supply to sun high humidity or dusty environments e Never remove the metal cover of t
13. ge gt Return value voltage gt lt preset 2 000 XXX OK CR current gt lt preset 3 lt preset X current gt voltage gt lt preset 3 000 XXX Sets preset 1 voltage and current current gt CR to 1 1 V and 2 2 A preset 2 voltage and current to 3 3 V and Return value 4 4 A and preset 3 voltage and OK CR current to 5 5 V and 6 6 A Input command Get voltage and Input command GETS CR current setting values GETS CR from power supply Return value Return value voltage current CR voltage 000 XXX 025051 OK CR current 000 XXX OK Indicates voltage setting is 2 5 V and current setting is 5 1 A Command code amp Return value Input command GETDI CR Return value voltage current stat us CR OK CR Input command GETM CR Return value preset 1 voltage preset 1 current CR preset 2 voltage preset 2 current CR preset 3 voltage preset 3 current CR OK CR Input command RUNM lt memory gt CR Return value OK CR Get display voltage current and status reading from power supply voltage 0000 XXXX current 0000 XXXX status 0 1 O CV 1 CC Get preset memory values lt preset 1 2 3 voltage gt 000 XXX lt preset 1 2 3 current gt 000 XXX Set voltage and current using values saved in preset memory locations lt memory gt 0 1 2 O preset 1 values 1 preset 2 values 2 preset 3 values 28 Input command GETDI CR
14. he 5 kQ variable resistor for current adjustment 7 Switch off the power supply 5 1 3 Enable and Disable the Output This remote output on off control can be activated in any of the modes By default Pin 5 is open and output is on 20 Shorting Pin 5 to Pin 4 ground will turn the output off When output is off the CV and CC LED will flash The current output voltage and current setting will show on the panel meter You can also adjust the output by voltage and current control knob to your desired value when output is off 5 2 PC Interface Control Note The power supply must be in Normal Mode for PC interface control 5 2 1 General Functions and Display The remote control PC software will display all output voltage current and power readings Power supply voltage and current values can be set in two different ways Values can either be entered via keyboard or set by clicking on the displayed voltage and current setting left click to increase value right click to decrease value The output status is also shown and can also be clicked to set the power supply output ON or OFF Set Voltage and Current Set Voltage and Current Clickto set Voltage 120V of Current 5 004 e Output voltage pu voltag SETTING reading g g 4 V const 20 Output current q L A SODA reading Output power be IS w in watts Output ON OFF status WA Click to set output ON or OFF OUTPUT o o Figure 7
15. he power supply while AC power is connected e Never touch the unit when your hands are wet e Never block the ventilation slots and cooling fan air intake window e Never attempt to repair the power supply Incorrect re assembly may result in a risk of electric shock or fire e Never use the power supply for a load requiring higher current than the designed value Otherwise it may damage the power supply e Place the power supply on a flat surface with sufficient clearance and dry dust free surroundings for ventilation This series has three models with different output voltage and current ranges Make sure you have purchased the correct one Model Number Output Voltage Range Total Rated Current 1687B 1 36V 0 10A 1688B 1 18V 0 20A Table 1 Model Table 4 1 Using the Power Supply 4 1 1 Connection To connect the equipment to the power supply follow the steps below 1 Check the rating label of the power supply and confirm that it complies with your AC mains voltage 2 Connect the power supply to the AC mains using the provided power cord and make sure the Mode Selection Switch is in the Normal position 3 Hook up the red terminal to the positive polarity input of the equipment and the black terminal to the negative polarity input of the equipment 4 Switch on the power supply first The panel meter and green CV indicator should light up again 5 Switch on the equipment The panel meter and green CV i
16. igure 12 Settings Configuration Data Log Sampling Time You can select your desired data log sampling time from 1 second and up Voltage Upper Limit UVL Setting You can set your output voltage upper limit value to safeguard your low voltage applications Current Upper Limit UCL Setting You can set your output current upper limit value to safeguard your low current applications 5 2 6 Command Set Note In order to use remote commands please make sure to use the following communication settings Baud rate 9600 Data bits 8 Parity none Stop bits 1 If you are using HyperTerminal make sure to check your ASCII setup to not append line feeds 26 Command line format COMMAND lt parameter1 gt lt parameter2 gt CR Current value will have one decimal place for models 1687B and 1688B and two decimal places for Model 1685B Command code amp Return value Input command Set voltage level Input command VOLT lt voltage gt CR lt voltage gt 000 XXX VOLTO10 CR Return value Return value OK CR OK CR Sets voltage level to 1 0 V Input command Set current level Input command CURR lt current gt CR lt current gt 000 XXX CURRO25 CR Return value Return value OK CR OK CR Sets current level to 2 5 A Input command Set power supply Input command PROM lt preset 1 preset memory values PROM011022033044055066 voltage gt lt preset 1 current gt lt preset 2 lt preset X volta
17. ndicator should still remain green 6 When an operation is finished switch off the equipment first and then switch off the power supply 4 1 2 Self Test Sequence The power supply will perform a series of self checks when it is switched on The table below shows the self test sequence Front Panel Display To show software version 10 Segment check C V indicator check C C indicator check I I 4 REAR and C C V Rear control indicator N x CONTROL n check Return to C V Start power supply checks Overvoltage protection check Overload protection check Front Panel Display Overtemperature protection check Output off remote control mode Table 2 Self Test Sequence The LED and other indicators on the front panel will be turned on When the cooling fan is being checked a loud fan noise can be heard After the self checks the CV V and A LED indicators are lit up displaying voltage and 0 0 current To find out about the set CC current level just turn the current control knob one click in either direction The current display returns to 0 0 after a few seconds 4 1 3 Control Knobs The rotary encoder control knobs have fine and coarse tuning with clicking movement Push the knobs to toggle between coarse and fine tuning You will notice the subtle change in brightness of LED Adjust the knobs to your desired values through coarse and fine tuning The display will resume its normal b
18. oblem and return any leads probes connectors and accessories that you are using with the device Non Warranty Service Please go to the support and service section on our website atwww bkprecision com to obtain an 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 amp 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 37 10 Limited Two 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 two years from date of purch
19. positive polarity of first external voltage source and pin 4 to negative polarity of first external voltage source 3 Connect pin 3 to positive polarity of second external voltage source and pin 4 to negative polarity of second external voltage source 4 Turn the remote control ON OFF switch to ON position 18 5 Switchon the power supply 6 Checkthe output voltage range of the power supply by varying the external voltage source for voltage adjustment from O to 5 V 7 Short circuit the main output with an 8AWG gauge wire and check the display for CC setting by varying the external voltage source for current adjustment from O to 5 V 8 Switch off the power supply 5 1 2 Using Two 5 kO Variable Resistors 1 Make sure the load is disconnected and the power supply is OFF 2 Prepare two 5 kQ variable resistors and connect wires from pins 1 2 3 and 4 as shown in Figure 7 PIN 1 5V Internal DC PIN 3 Icc adjust PIN 4 GROUND Figure 6 Variable 5 kQ Resistors Setup 19 FUNCTIONS REMARKS e e N A PIN Ti 8 Table 5 Remote Connector Plug Pin Assignment for Variable Resistors 3 Turn the remote control ON OFF switch to ON position 4 Switch on the power supply 5 Check the output voltage range of the power supply by varying the 5 kQ variable resistor for voltage adjustment 6 Short circuit the main output with 8AWG gauge wire and check the display for CC setting by varying t
20. r plug a Remove the black portion of the remote control connector plug by removing the screw as shown in Figure 3 D N Remove the screw Rotate the pin plug Remove the pin plug Figure 3 Remote Control Connector b Solder 5 wires 22AWG to pins 1 2 3 4 and 5 of pin plug Refer to Figure A for pin numbers 16 Figure 4 Pin Numbers c Make sure the load is disconnected and the power supply is OFF d Plug the remote connector plug into the analog remote control terminal of the power supply e Secure the remote connector plug to the terminal socket by screwing in the connector ring Figure 5 Connector ring Figure 5 Connector Ring Then you can choose one of the following two methods to use the analog remote control feature 1 Using two external variable DC voltage sources or 2 using two 5 kO variable resistors 17 5 1 1 Using Two External Variable DC Voltage Sources PIN FUNCTIONS REMARKS El Output OFF Short to Ground Table 4 Remote Connector Plug Pin Assignment for External Variable Voltage Sources A variable external DC voltage source of 0 5 V is fed into the analog remote control terminal to adjust the output voltage level of both Main and Auxiliary output WARNING Do not input higher than 5 V otherwise the overvoltage protection OVP will be triggered 1 Make sure the load is disconnected and the power supply is OFF 2 Connect pin 2 to
21. rent control modes for the power supply e Normal e Preset e Set e Remote Control To select a mode slide the Mode Selection Switch on the rear of the unit 13 Note The power supply is factory preset to Normal Mode with maximum current level 4 2 1 Normal Mode This is the factory preset mode and the power supply output voltage and current are controlled by the dual action dial knobs Push the knobs to toggle the coarse and fine tuning You will notice the subtle change in brightness of LED Adjust the knobs to your desired values through coarse and fine tuning To check the preset current level turn the Current Knob lightly in any direction The display will resume its normal brightness after a few seconds to confirm your adjustment 4 2 2 Preset Mode In this mode the Rear Control light is ON to indicate panel voltage and current controls are deactivated There are three presets P1 P2 P3 on the Recall Selection Switch The factory preset values are shown in Table 3 The user can also set custom output voltage and current using Set Mode Please refer to Section 4 2 3 for details Model 1685B 55 V P3 Model 1687B 25 V Maximum Model 1688B 15 V Table 3 Default Presets 14 4 2 3 Set Mode First enter Set Mode by pushing Mode Selection Switch to Set position To define the preset output P1 P2 P3 Select the Recall Switch to the position you want to set P1 P2 or P3 Adjust the fron
22. rightness after a few seconds to confirm your adjustment 12 4 1 4 Using Both Main and Auxiliary Outputs The power supply has a main output in the rear and an auxiliary output in the front that can be used separately or together The main and auxiliary output both share the same voltage and current control knobs and will output the same voltage and current up to the maximum output ratings of the power supply and terminals When using both the main and auxiliary outputs together the power supply will automatically total the currents supplied to both terminals up to the current limit of the power supply and show the total current on the display For example setting the voltage and current outputs for model 1688B 1 18 V 0 20 A to 18 V and 20 A would output 18 V at both main and auxiliary terminals and allow you to draw up to a total of 20 A between the two terminals If there is a 5 A load at the auxiliary terminal the most current you can draw from the main output is 15 A If the power supply reaches its set current limit at any time the power supply will go into CC mode and the loads together will draw up to the total value of the current limit Distribution of current between the main and auxiliary terminals will vary depending on the loads Note 1685B Total rated current Aux Main is 5 A 1687B Total rated current Aux Main is 10 A 1688B Total rated current Aux Main is 20 A 4 2 Control Modes There are four diffe
23. rning switch off the unit and remove all loading Check your load and output settings and allow the unit to cool down for at least 30 minutes Check if any of the ventilation is blocked and make sure there is enough clearance around the power supply Listen carefully for the fan noise from the cooling fan when you turn on the unit again If you cannot hear this routine self test fan noise upon power on the fan has failed and the power supply should not be used In this case please contact B amp K Precision 6 3 OLP Overload Protection Normally the overload protection is sustained by the CC constant current mode When the CC mode fails and goes undetected it may cause serious damage to your device under test The OLP is to minimize the extent of damage to your loads as power supplies will fail at some point in time Switch off your power supply as soon as you see this warning as shown in Figure 15 32 REAR CONTROL Figure 15 Overload Protection To reset this warning switch off the unit and remove all connected devices Switch the unit back on again and double check with caution If the problem persists please contact B amp K Precision 6 4 Fuse Replacement If the fuse blows the CV or CC indicators will not light and the power supply will not operate The fuse should not normally open unless a problem has developed in the unit Try to determine and correct the cause of the blown fuse then replace only with a fuse of the co
24. rrect rating as listed below The fuse is located on the rear panel see Figure 2 Pull fuse compartment out with a flathead screwdriver and replace fuse in holder Line Voltage Fuse Type 100 240 VAC 6 A 250 V 20mm standard glass tube fast blow Table 6 Fuse Table 33 7 Specifications Load 10 90 Rated Voltage lt 100 mA Line 90 132 VAC 170 264 VAC Variation Ripple amp Noise Ripple Noise Voltage lt peak peak SC Meter Type amp Accuracy 3 Digit LED Display 0 2 3 counts 3 Digit LED Display 0 2 3 counts Input Voltage 100 240 VAC 50 60 Hz A NE 3 7 A 100 VAC 4 6 A 100 VAC 4 6 A 100 VAC H 1 7 A 230 VAC 2 1A 230VAC 2 1A 230 VAC Efficienc 82 100 VAC 82 100 VAC 81 100 VAC Yy 86 230 VAC 86 230 VAC 85 230 VAC Switching Frequency 100 120 kHz 34 O P 1 5 V set O P 1 5 V set voltage 2 V voltage 2 V O P 1 5 V set Tracking Overvoltage O P 5 20 V set O P 5 20 V set voltage 2 V Protection voltage 3 V voltage 3 V O P 5 18 V set O P 20 60 V set O P 20 36 V set voltage 3 V voltage 4 V voltage 4 V Transient Response Time 50 100 Load Power Factor Correction gt 0 95 at optimal load Cooling Method Thermostatically controlled fan from zero to full speed Overvoltage Overtemperature Overload 3 User Defined Voltage and Current Presets Analog Special Features Remote Control 1 5 ms Max 20 volt
25. t panel voltage control knob to set your desired voltage value Adjust the front panel current control knob to set your desired current limit value Repeat the procedure for remaining presets P1 P2 or P3 if desired Move Mode Selection Switch from Set to Preset position to confirm your settings To reset the unit back to factory settings Turn OFF the power supply Push and hold both front panel voltage and current control knobs at the same time Turn ON the power supply Release front panel voltage and current control knobs All the set values in the presets will be saved even after the power supply has been turned off Always check output voltage of Presets before connecting to load To check the preset values move Mode Selection Switch to Preset position Move the Recall Switch to P1 P2 or P3 The voltage and current settings of corresponding presets P1 P2 or P3 will be shown on the panel meters 15 4 2 4 Analog Remote Control Mode Select this mode to control the output voltage and current via remote control connector Please refer to Section 5 1 for more details 5 Remote Control There are two methods to remotely control voltage and current Note Both methods require the remote control connector plug to be set up in order for analog remote control mode to be functional otherwise the unit will be in CC mode all the time 5 1 Analog Remote Control Set up the provided remote connecto
26. ty standards To avoid electrical shock hazard disconnect power cord before removing covers Refer servicing to qualified personnel Before connecting the line cord to the AC mains check the rear panel AC line voltage indicator Applying a line voltage other than the indicated voltage can destroy the AC line fuses For continued fire protection replace fuses only with those of the specified voltage and current ratings This product uses components which can be damaged by electro static discharge ESD To avoid damage be sure to follow proper procedures for handling storing and transporting parts and subassemblies which contain ESD sensitive components SAFETY SYMBOLS A Certification This symbol on an instrument indicates that the user should refer to the operating instructions located in the manual We certify that this product met its published specifications at time of shipment from the factory Compliance Statements Disposal of Old Electrical amp Electronic Equipment Applicable in the European Union and other European countries with separate collection systems This product is subject to Directive 2002 96 EC of the European Parliament and the Council of the European Union on waste electrical and electronic equipment WEEE and in jurisdictions adopting that Directive is marked as being put on the market after August 13 2005 and should not be disposed of as a al unsorted municipal waste Please utilize yo
27. ur local WEEE collection facilities in the disposition of this product and otherwise observe all applicable requirements Contents T Safety eege ELLA ne ELA LIE 1 2 INTO UC Nit ti A A tte 6 3 Controls andIndicators i 7 3 1 Front EE 7 3 2 Rear Panelin aia a a E 8 4 Operating Instructions niir aa e a a a aia 9 4 1 Using the Power Supply 10 4 1 1 ele et 10 4 1 2 Self Test Sequence nr AI 10 4 1 3 TER le 12 4 1 4 Using Both Main and Auxiliary OUtputs 13 4 2 Control Modes ii 13 4 2 1 Normal Mode 14 4 2 2 Preset MOd amp sca lia di dra 14 4 2 3 ET EE 15 4 2 4 Analog Remote Control Mode i 16 5 Remote Control lia lalla aaa 16 5 1 Analog Remote Control 16 5 1 1 Using Two External Variable DC Voltage Sources 18 6 10 5 1 2 Using Two 5 kQ Variable RESIStOrs 19 5 1 3 Enable and Disable the Output 20 5 2 PC Interface Controle ciare alia le aaa 21 5 2 1 General Functions and Display 21 5 2 2 External Timed Program 22 5 2 3 Internal Preset Memor 23 5 2 4 Data CoB uil lane ee 24 5 2 5 Settings alia i vated detected ae eebe 26 5 2 6 Command EK 26 Faults and Troubleshooting ii 31 6 1 OVP Overvoltage Protection iii 31 6 2 OTP Overtemperature Protection 31 6 3 OLP Overload Protection 32 6 4 Fuse Replacement isn tse ov al ie ae alal 33 o dennie
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