Model: 8600, 8601, 8602 Programmable DC Electronic Loads USER MANUAL
Safety Summary The following safety precautions apply to both operating and maintenance personnel and must be followed during all phases of operation, service, and repair of this instrument. Before applying power to this instrument: Read and understand the safety and operational information in this manual. Apply all the listed safety precautions. Verify that the voltage selector at the line power cord input is set to the correct line voltage.
Category IV (CAT IV): Measurement instruments whose measurement inputs are meant to be connected to the primary power entering a building or other outdoor wiring. Do not use this instrument in an electrical environment with a higher category rating than what is specified in this manual for this instrument. You must ensure that each accessory you use with this instrument has a category rating equal to or higher than the instrument's category rating to maintain the instrument's category rating.
Do not operate in an explosive or flammable atmosphere Do not operate the instrument in the presence of flammable gases or vapors, fumes, or finelydivided particulates. The instrument is designed to be used in office-type indoor environments. Do not operate the instrument In the presence of noxious, corrosive, or flammable fumes, gases, vapors, chemicals, or finely-divided particulates. In relative humidity conditions outside the instrument's specifications.
cord, remove the instrument from service, label it as not to be operated, and return the instrument to B&K Precision for repair. Notify B&K Precision of the nature of any contamination of the instrument. Clean the instrument only as instructed Do not clean the instrument, its switches, or its terminals with contact cleaners, abrasives, lubricants, solvents, acids/bases, or other such chemicals. Clean the instrument only with a clean dry lint-free cloth or as instructed in this manual.
Hazardous voltages may be present in unexpected locations in circuitry being tested when a fault condition in the circuit exists. Fuse replacement Fuse replacement must be done by qualified service-trained maintenance personnel who are aware of the instrument's fuse requirements and safe replacement procedures. Disconnect the instrument from the power line before replacing fuses.
Use correctly sized wires To connect the load to the power supply, use a wire diameter large enough to handle the maximum continuous output short-circuit current of the power supply without the wire overheating. For continued safe use of the instrument Do not place heavy objects on the instrument. Do not obstruct cooling air flow to the instrument. Do not place a hot soldering iron on the instrument. Do not pull the instrument with the power cord, connected probe, or connected test lead.
Compliance Statements Disposal of Old Electrical & 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 unsorted municipal waste.
CE Declaration of Conformity The instrument meets the requirements of 2006/95/EC Low Voltage Directive and 2004/108/EC Electromagnetic Compatibility Directive with the following standards.
Safety Symbols CAUTION indicates a hazardous situation which, if not avoided, could result in minor or moderate injury. WARNING indicates a hazardous situation which, if not avoided, could result in death or serious injury. Chassis (earth ground) symbol. On (Power) Off (Power) On (Power). This is the In position of the power switch when instrument is ON. Off (Power). This is the Out position of the power switch when instrument is OFF.
Table of Contents Safety Summary ...................................................................................................i Compliance Statements ............................................................................................................. vii CE Declaration of Conformity.................................................................................................... viii 1 General Information ....................................................................................
Constant Current (CC) Mode ................................................................................................. 18 Constant Voltage (CV) Mode ................................................................................................. 20 Constant Resistance (CR) Mode ............................................................................................ 22 Constant Power (CW) Mode ..................................................................................................
OPP Test Function .................................................................................................................. 72 3.10 4 Key Lock......................................................................................................................... 75 Remote Operation ...................................................................................... 76 4.1 Interface Connection.....................................................................................................
1 General Information 1.1 Product Overview The 8600 Series DC Electronic Loads are versatile instruments used for static and dynamic testing of DC power supplies, batteries, DC-to-DC converters, and battery chargers. Other applications include fuel-cell and photovoltaic cell test. The DC load can be used in one of the following operation modes: constant voltage (CV), constant current (CC), constant resistance (CR), or constant power (CW).
1.2 Package Contents Please inspect the instrument mechanically and electrically upon receiving it. Unpack all items from the shipping carton, and check for any obvious signs of physical damage that may have occurred during transportation. Report any damage to the shipping agent immediately. Save the original packing carton for possible future reshipment.
Figure 1 – Front and Side View 3
Figure 2 - Rear View 4
1.4 Rackmount Installation The instrument can be installed in a standard 19 inch rack. The optional rackmount kit IT-E151 is required. Below is an image of a model installed with the IT-E151 rackmount kit. This rackmount kit will allow up to two models installed side by side, as shown below.
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1.7 Display Overview OFF CC CV CR CW Rmt * Shift Addr SRQ Error 80.000V CC = 85.
Rear Indicates external analog control is enabled. Auto Indicates voltage auto range is enabled.
2 Getting Started Before connecting and powering up the instrument, please review and go through the instructions in this chapter. 2.1 Input Power and Fuse Requirements Input Power The load has a selectable AC input that accepts line voltage input within: Voltage: 115 V (+/-10%) or 230 V (+/- 10 %) Frequency: 47 Hz – 63 Hz Use the line voltage selector switch in the back to switch between 110 V and 220 V operation.
Disconnect all cables including the power cord from the instrument when changing the instrument's line voltage. After changing the line voltage setting, ensure the instrument has fuses of the proper ratings and types for the selected line voltage before applying line power. Fuse Requirements An AC input fuse is necessary when powering the instrument. Below is a table of the fuse required for all models operating with either 110 VAC or 220 VAC input.
Fuse box slit Fuse box Check/Remove Fuse Figure 7 - Fuse Box 2.2 Input Connections The main DC input terminal is a screw type binding post terminal located in the front panel. To loosen, turn the terminal cap counter-clock wise. Note: The screws on the terminals can be completely removed to allow for ring type adapters (must be greater than 6mm in diameter). Due to the high current rating of the DC load, proper wire sizes are necessary for safe connectivity and to prevent wires from overheating.
2.3 Preliminary Check Complete the following steps to verify that the load is ready for use. 1. Verify AC Input Voltage Verify and check to make sure proper AC voltages are available to power the instrument. The AC voltage range must meet the acceptable specification as explained in “2.1 Input Power and Fuse Requirements”. Check to verify that the unit is configured to operate at the AC input voltage level of the power source. If not, it will damage the unit and void its warranty. 2.
Table 2 - Self-test Messages Error Message on Display EEPROM FAILURE Config Data Lost Calibration Data Lost FactoryCal.Data Lost MainframeInitialize Lost Description The internal EEPROM is corrupted or damaged. The last operation data within the EEPROM is lost. Calibration data within the EEPROM is lost. Factory calibration data is lost. The system settings within the EEPROM is lost. If any of these errors occur, please contact B&K Precision.
Check Model and Firmware Version The model and firmware version can be verified by using the *IDN? query remote command. It can also be found from the front panel: 1. Press and press . 2. The display will show the following: 0.000V 8600 0.000A Ver : 1.29 – 1.36 3. The model is shown above as 8600, and the firmware version is shown as 1.29-1.36. 4. Press once to return to the normal display.
3 Front Panel Operation 3.1 Menu Options Most settings and parameters can be configured from the built-in menu systems of the instrument. There are two main menus: System and Config. System Menu To access the system menu, press then . The system menu will have the following options: Initialize Power-On Buzzer Knob Trigger Memory Displ (Display) Communication Protocol Reset load settings to factory default values. Configure power-on state. Enable/Disable key sound.
How to Navigate the Menu Before using the instrument, it is important to be familiarized with its menu structure and learn how to view or change settings and parameters. Follow the steps below to guide you in selecting menu options. 1. Follow the instructions above to access the System or Config menu. 2. The selected item will be blinking. Use selections. and 3. When the desired menu section is blinking, press 4. Below is the display when SYSTEM is selected.
3.2 Configure Operation Modes (CC/CV/CR/CW) The electronic load can work in the following modes: 1) 2) 3) 4) Constant current (CC) operation mode Constant voltage (CV) operation mode Constant resistance (CR) operation mode Constant power (CW) operation mode Constant Current (CC) Mode In this mode, the electronic load will sink a current in accordance with the programmed value regardless of the input voltage.
The setup parameters are: Range, High (Voltage limit), Low (Voltage limit), and Rise/Fall time. Use the value. Press key to select each parameter, and use the numeric keypad to change the to confirm the change. Range Use the numeric keypad to change the range. This value will also act as a limit to how much current the load can be configured to. The adjustable ranges vary depending on the model. See specifications for details.
Current slew rate is defined as the change in current over time. A programmable slew rate allows a controlled transition from one load setting to another. The actual transition time is defined as the time for the input to change from 10% to 90%, or 90% to 10% of the programmed current values. The graph below illustrates slew rate measurements. Figure 8 - Slew Rate Measurement Between the 10% and 90% region, the slew rate can be measured by observing the steepest slope portion.
Configure CV Parameters There are several parameters that should be set up prior to operating in CV mode. Press so that it lights up, then press setup menu will be shown: and to access Setup for CV mode. The Constant Voltage R ange =60.00 0 V The setup parameters are: Range, High (Current limit), and Low (Current limit). Use the key to select each parameter, and use the numeric keypad to change the value. Press to confirm the change. Range Use the numeric keypad to change the range.
Note: This parameter is used for Automatic Test Function ONLY. Low This parameter refers to the current low limit for the automatic test mode. During automatic test mode, the DUT must be operating below the configured value for the test to PASS upon completion. If the DUT operates above the configured value, the test will FAIL upon completion. Note: This parameter is used for Automatic Test Function ONLY.
The setup parameters are: Range, High (Voltage limit), and Low (Voltage limit). Use the key to select each parameter, and use the numeric keypad to change the value. Press to confirm the change. Range Use the numeric keypad to change the range. This value will also act as a limit to how much resistance the load can be configured to. The adjustable ranges vary depending on the model. See specifications for details. High This parameter refers to the voltage high limit for the automatic test mode.
Configure CW Parameters There are several parameters that should be set up prior to operating in CW mode. Press so that it lights up, then press setup menu will be shown: and to access Setup for CW mode. The Constant Power R ange =250.0 0 W The setup parameters are: Range, High (Voltage limit), and Low (Voltage limit). Use the keys to select each parameter, and use the numeric keypad to change the value. Press to confirm the change. Range Use the numeric keypad to change the range.
This parameter refers to the voltage low limit for the automatic test mode. During automatic test mode, the DUT must be operating below the configured value for the test to PASS upon completion. If the DUT operates above the configured value, the test will FAIL upon completion. Note: This parameter is used for Automatic Test Function ONLY. Setting CC, CV, CR, CW Mode Follow the steps below to configure the mode and enable the load. 1. Press / / / (for CC/CV/CR/CW mode) so that it lights up. 2.
Note: Restoring the instrument to factory default will change all current instrument settings and parameters back to their default values. 1. From the SYSTEM menu, select Initialize and press . 2. The following screen will display. Select Yes to restore default settings, or No to cancel. INITIALIZE SYSTEM? NO Y ES The following table lists some of the factory default settings.
Configure Power-On State The initial Power-On state of the load can be configured by following the steps below: 1. From the SYSTEM menu, select Power-On and press . 2. There are two options: Rst(Def) – Factory Default. Sav0 – Settings before last power up. Recalls the settings saved to “0” memory location. 3. Select the settings you want during power up, and press 4. To exit the menu at any time, press to save changes. twice. Load On Knob This setting controls the behavior of the knob. 1.
panel, through a remote command via remote interface or through the external trigger input in the rear panel. Follow the steps below to configure the trigger mode: 1. From the SYSTEM menu, browse and select Trigger and press . 2. Here are the options: Manual(Def) – Manual trigger. Front panel trigger button is used to send a trigger (press and to send trigger). External – External trigger. Trigger can be sent by connecting the Trig input and the ground input together in the rear panel.
The instrument can save up to 100 instrument settings in non-volatile memory. Memory is allocated in 10 different storage groups (group 0 to 9), and each group has 10 memory locations to store settings (0 to 9). These memory locations are referenced by numbers 1 – 100. When saving an instrument setting, numbers 1 to 100 can be selected.
Select Storage Group 1. From the SYSTEM menu, browse and select Memory and press screen will appear. . The following MEMORY Group = 0 2. Use the current adjust knob or the numeric keypad to enter the storage group. Select between 0 – 9. Press to save selection. 3. To exit the menu at any time, press twice. NOTE: The storage group setting also affects the automatic test function of the load. Refer to “Automatic Test Function” for more details. Save Settings 1.
3. Use the current adjust knob or the numeric keypad to enter the memory location in which to store current instrument settings. Select between 0 – 100. Press save to the selection location. to NOTE: The “0” memory location is reserved for storing instrument settings last configured before power-off and is used only for power-on state configuration only. Recall Settings 1. First, consider the memory locations you want to recall from.
1. From the SYSTEM menu, browse and select Displ and press screen will appear. . The following DISPLAY ON TIMER On Off (de f au lt ) 2. Select On to enable the timer, and Off (default) to disable. Press 3. Press to confirm. twice to exit the menu. The timer will now be displayed like the following: 12.000A 80.000V 0.0 0 W 0.0 000 S CC = 1.00 0A 4. When input is enabled (ON), the timer will start counting the time.
From the SYSTEM menu, browse and select Communication and press screen will appear. . The following COMMUNICATION R S232 USBT MC GPIB RS-232 Follow the steps below to configure the instrument for RS-232 operation: 1. Select RS-232 and press to set to RS-232 for remote communication. The following display will be shown: RS232 48 00 , 8 , N , 1 , NON E 2. 4800 is the baud rate; 8 is the data bits; N is the parity; 1 is the stop bit; Addr… is for address. 3.
5. All serial settings must match with the settings configured on the PC in order for communication to link successfully. USBTMC A USB Type A to Type B cable (i.e. USB printer cable) is required to connect the USB port in the rear panel to a PC. Follow the steps below to setup the load for remote communication. 1. From the SYSTEM menu, browse and select Communication and press . 2. Select USBTMC and press to set USBTMC for remote communication. 3. Install the USB driver.
3.4 CONFIG Menu All setup procedures and settings explained in this section can be accessed from the CONFIG menu. To access this menu, press and . The following screen will show: CONFIG MENU V on P rote ct Me asu re CR_ LED Von Operation The Von voltage value can be set to control the voltage turn on state for the electronic load. When the input voltage exceeds the Von voltage value, the electronic load’s input state turns on.
Figure 9 - The Load's Operating Range with Von Latch set to ON When Von Latch is OFF, the electronic load will begin sinking current if the input voltage exceeds the Von voltage. When the input voltage drops below the Von voltage value, the electronic load will still continue sinking current and the input remains on.
Figure 10 - Von Latch OFF The Load's Operating Range with Von Latch set to OFF To set the Von modes, from the CONFIG menu, select Von and press be displayed: . The following will VON LATCH On O ff Use the and keys to select between On or Off and press confirm selection. Afterwards, you will be prompted to enter the voltage point of Von. Use the numeric keypad or rotary knob to change this value.
Configure Protection Settings The electronic load has the following protection functions: Overvoltage protection (OVP), overcurrent protection (OCP), overpower protection (OPP), overtemperature protection (OTP), and local and remote reverse voltage protection (LRV/RRV). The instrument will act appropriately once any of the above protections are active. You can press any button on the front panel to restore the protection function.
5. It will then prompt to enter a value for Delay. This is the protection trip delay, which is the amount of time to delay from when the input has reached the limit before triggering OCP. Use the numeric keypad or rotary knob to enter a value, then press confirm change. The valid range is 0 – 60 seconds. to NOTE: Software OCP will disable the input if the input current has reached or exceeded the protection limits.
Software OPP - Users can set the electronic load’s software OPP value with the following steps. 1. Go to CONFIG menu and select Protect. Then press 2. Select P-limit and press . . 3. To enable software OPP, select On and press . The default is Off. 4. If enabled (ON), the load will prompt to enter a value for Point. Use the numeric keypad or rotary knob to enter the OPP power limit value, then press . The valid range depends on the model of the load. 5. It will then prompt to enter a value for Delay.
Overtemperature Protection (OTP) There is an overtemperature protection circuit, which will turn off the input if the internal temperature exceeds safe limits. When the electronic load’s internal circuit temperature is over 85C, the load will enable OTP. Input will automatically be turned off and the VFD will display OTP. At the same time the OT and PS bits in the status register will be set and remain until they are reset.
Configure Timed Input The load has a built-in timer function that can be configured to allow enabling (ON) the main input for a specified amount of time. To configure this time, follow the steps below: 1. Go to CONFIG menu and select Protect. Then press 2. Select Time and press . . 3. To enable timed input, select On and press . The default is Off. 4. It will then prompt to enter a value for Delay.
3. To enable voltage auto range, select On and press press . To disable, select Off and to confirm the change. Measuring Rise and Fall Time The instrument can measure the rise or fall time from a specified start and stop voltage level of the measured input. This feature requires the display timer to be enabled first. To enable timer, please follow the instructions in the “Display Input On Timer” section of “3.3 SYSTEM Menu”. To setup this measurement, follow the steps below: 1.
CR LED Function CR LED is a function that allows the instrument to simulate the loading behavior of typical LEDs, which can be used for testing LED drivers. When the function is enabled, the load allows the user to configure the LED’s operating resistance and forward voltage along with the voltage range (same as CR operation). Below illustrates the V-I characteristics curve of a typical LED.
5. Use the numeric keypad or rotary knob to enter the values for Range, Voltage High, Voltage Low, and Vd. Vd will be the forward voltage of the LED you want to simulate. This option will only appear after CR_LED has been enabled from the CONFIG menu. 6. While in CR mode, use the numeric keypad or rotary knob to enter a value for Rd, the resistance. 7. Now that both Vd and Rd are configured, turn ON the input by pressing .
7. To enable remote sense, go to CONFIG menu and select Remote-Sense and press . 8. Select On to enable or Off to disable remote sense. The default is Off. 9. Once it is turned on, the Sense annunciator will appear at the top of the display. Sense 12.000A 80.000V 0.0 0 W 60000 .0S CC = 1 .000 A The electric potential on the positive terminal of Sense+ connector must be higher than the negative terminal.
4. Connect the external analog control pins from the rear panel of the instrument to your voltage control source as shown below: Rear Panel Terminals External Voltage Source 0 – 10 V Figure 13 - Analog Control Setup 5. Set the instrument to CC mode and enable the input to begin controlling with the external voltage source. Do not connect more than 30 V into the external program terminal pins or damages may occur.
Disable (OFF) input: Disconnect the short between the two pins. Note: The external analog control does not have to be turned ON from the menu for these pins to function as intended. To avoid accidentally turning ON the load’s input, keep these pins opened with nothing connected when external On/Off control is not used or needed. Voltage Fault Indicator The terminal pin labeled VF in the rear panel outputs a 5 VDC signal under normal operations.
3.6 Transient Operation Transient operation enables the module to periodically switch between two load levels, as might be required for testing power supplies or other DC sources. There are three different transient testing modes: continuous, pulse, and toggle. Continuous Generates a respective pulse stream that toggles between two load levels. Pulse Generates a load change that returns to its original state after some time period.
Figure 14 - Continuous Transient Operation Current Waveform Pulse In this mode, the electronic load generates a transient pulse of programmable width when pulse transient operation is in effect. In pulse mode, you can set A/B level, the pulse width, and A/B slew rate. The electronic load will automatically switch to A level after maintaining A width time. Then it will switch to B level. The electronic load will not switch to A level again until the instrument receives a trigger signal.
Figure 16 - Toggle Transient Operation To enable and setup transient mode, follow the steps below: 1. First, select the load’s mode of operation, which will determine which type of transient operation will be configured. Press or to select between CC, CV, CW, or CR mode. Verify the selection by the backlight behind its corresponding button, which will be lit when selected. 2. From the front panel, press and then . The following display will show: TRANSITION On O ff 3.
TRANSITION Con tin uous Pul se To g gl e 4. Select the transient mode Continuous, Pulse, or Toggle. Press . 5. For CC mode, the following display will show. For all other modes, skip to step 9. TRANSITION Hi gh -R ate Lo w -R ate 6. Select either High-Rate or Low-Rate. These options configure the settable slew rate range. If High-Rate is selected, users can adjust the slew rate of the transient in the A/us range. If Low-Rate is selected, users can adjust the same in A/ms range.
11. The load will return to the Transient menu. Press to return to the normal display. The Trig annunciator will appear and the display will look like below. Trig 12.000A 80.000V 0.0 0 W 0 0000.0 S 1 TRA N 12. Depending on the selected Trigger Source from within the SYSTEM menu, the operation may start immediately. 13. To run the transient operation, first press to enable the input. Then, send a trigger to start the operation. If Trigger Source is set to Manual, press and then to send a trigger.
3.7 List Operation List mode lets you generate complex sequences of input changes with rapid, precise timing. This is useful when running test sequences with a minimum amount of overhead. The parameters of List operation include the name, number of steps (2-84), step width time (20us-3600s), and every steps’ set value and slew rate. The list file can be saved in non-volatile memory where it can be quickly recalled. Users can edit up to 7 groups of List files in CC mode only.
Configure List Follow the steps below to configure list operation: 1. From the front panel, press and then . The following display will show: LIST On R e cal l 2. Select Edit and press Edi t . The following display will show: EDIT LIST Hi gh -R ate Lo w -R ate 3. Select either High-Rate or Low-Rate. These options configure the settable slew rate range. If High-Rate is selected, users can adjust the slew rate of the transient in the A/us range.
EDIT LIST S te p 001 Le v el = 0.0000 A 7. Press and it will prompt to enter the slew rate of the step. If High-Rate was selected earlier, units will be in A/us. Otherwise, it will be in A/ms. EDIT LIST S te p 001 8. Press Rat e = 0.0001 A/us and it will prompt to enter the step with. Valid range is 20 us – 3600 s. Enter a value and then press to continue. EDIT LIST S te p 001 Wid th = 0.0000 2S 9. The load will prompt to enter parameters for the next step.
Run List To run a list, follow the steps below: 1. From the List menu, select Recall and press . The load will prompt for the memory location of the list to recall. Enter between 1 – 7 and press 2. Then, select On and press selection will become Off. 3. Press to recall. . The Trig annunciator will appear, and the On to go back to the normal display, which will then look like the following: Trig 12.000A 80.000V 0.0 0 W 0 0000.0 S 0 L IST 1 4.
6. To disable list operation, first press . Select Off and press list operation is disabled. to disable the input and then press and to confirm. The Trig annunciator will disappear when 3.8 Battery Test Function The load has a built-in battery test function that uses CC mode and calculates the battery capacity using a fixed current load. The test’s stop conditions can be specified by the following: Stop Voltage: Set a cut-off voltage level. When this level is reached, the test will end.
6. Lastly, it will prompt to enter the Stop Timer. Use the numeric keypad or rotary knob to enter a time value in seconds. Then press 7. The display will then show the following: to finish the setup. OFF CC 0.000A 10.000V 0.0 0 W 8. To start the battery test, press 0. 0S 0.000 Ah once. The input will automatically be enabled (ON) with the button’s backlight lit. The timer on the display will run continuously and Ah measurement will update through time.
the Automatic Test sequence, prior to running the automated test. Please see the Configure CC Parameters, Configure CV Parameters, Configure CR Parameters, and/or Configure CW Parameters configuration sections to set these parameters. Configuring Instrument Settings The automatic test runs a program that uses the settings stored into the internal EEPROM memory.
PROGRAM 9 Sequence 1 2 3 4 5 6 7 8 9 10 Save Group 81 82 83 84 85 86 87 88 89 90 PROGRAM 10 Sequence 1 2 3 4 5 6 7 8 9 10 Save Group 91 92 93 94 95 96 97 98 99 100 Example: In Program 1, sequence 1 correlates to instrument settings stored in memory location 1. In Program 5, sequence 5 correlates to instrument settings stored in memory location 45. In Program 8, sequence 10 correlates to instrument settings stored in memory location 80.
CC 1A 1 CV 3V 2 CW 0.5 W 3 CR 2Ω 4 CC 3.8 A 5 CC 0.5 A 6 CV 2.8 V 7 Refer to section “Save/Recall Instrument Settings” in section “3.3 SYSTEM Menu” for details on saving settings into internal memory. Note: If the program requires more than 10 sequences, each program can be linked (chained) to another program after it has completed. 1. Setup the program parameters. From the front panel press the PROGRAM menu. It will look like the display below: and then to access PROGRAM R un R e cal l 2.
indicating that they are active and will be run as part of the test program. In this example, the display will look like below: EDIT PROGRAM A c tive S eque nc e = 09 876Y YYYY To deactivate, press the corresponding number with the numeric keypad again. The sequence number on the display will change back from Y to the actual sequence number. 3. Press to continue. The next parameter to configure will be the Pause Sequence. This allows the test program to pause after running any selected sequence.
EDIT PROGRAM S ho rt S equen ce = □□□□□□4Y2Y 5. Press to continue. The display will show the following: EDIT PROGRAM S EQ 01 On Time = 0.0 S SEQ01 will be shown if sequence 1 is activated. Otherwise, it will display SEQXX where XX is the first sequence number in the program that is activated (starts from 1-9 and then 0). The load is prompting to enter the On Time for the sequence number in seconds. This is the length of time in which to run the sequence with input enabled (ON). Valid range is 0.
0 ≤ Tpf ≤ (Ton+ T off) Tpf = P/F Delay Time Ton = On Time Toff = Off Time Use the numeric keypad or rotary knob to enter a value. Then press . 8. If there are more than one active sequence, the load will repeat the prompts to configure the On Time, Off Time, and P/F Delay Time. Follow steps 7 – 9 for each sequence. 9.
numeric keypad or rotary knob. Then press to confirm and save all settings to the selected program number. The display will not return to the PROGRAM menu. Configuring Recall and Run Program The following is a procedure to recall and run a saved test program. Recall a Program 1. Press and then 2. Select Recall and press to enter the Program menu. . The display will be shown as below: RECALL PROGRAM R e call P rogram Fi le = 1 3.
OFF CC 0.000A 10.000V P R G01 ST OP PRG01 from this display indicates which program has been loaded to run. Depending on which program is recalled, it will show PRG01-PRG10. STOP indicates the program is not running. 4. Now, press once to start running the program. The display will change to: OFF CC 0.000A 10.000V P R G01 -01 on p ass -01 next to PRG01 indicates the current running sequence number within the selected program number. on indicates the input state is enabled for the selected sequence.
OFF CC 0.000A 10.000V P R G01 -01 o ff key p ass At this point, the program is in a pause state. To continue the test, press once. Note: At any time while the program is in the running state, if you wish to re-test a sequence or test a previous sequence, press the key. Each press will go back up one sequence and run the test again starting from that sequence. You can also skip to the next sequence in the test by pressing .
If there is a failure, fail will be indicated in place of pass. At this point, you can press to view which sequences were tested and passed/failed. It will be indicated like the following: OFF CC 0.000A 10.000V P R G01 : □□□□□□4 Y2Y p ass Y indicates the tested sequence(s) that passed/failed. If a sequence has been skipped in the test, its sequence number will be indicated instead of a Y. 7. To stop a running program at any time, press automatic test function, press normal display. once.
Start Current Max Trip Current This is the starting current value when OCP test begins. The settable range of this value is limited by Current Range. This is the size of the step current as the test runs from the Start Current to End Current. The test will only run through in steps if the measured input voltage is greater than the OCP Voltage. Otherwise, the test will end after running the Start Current for the amount of time specified in Step Delay.
4. Follow the same steps for Current Range. The value must be within the maximum input limits of the load. Press to continue. 5. Set the Start Current. The value must be less than Current Range. Press continue. 6. Do the same for Step Current and End Current. Press continue. 7. Enter a value for OCP Voltage and press 8. Finally, enter a value for Max Trip Current, and then Min Trip Current. Press after each settings to continue. The load will prompt to Save OCP File.
OFF CC 0.000A 10.000V 0.0 0W 0. 0000 A St op 3. Press to start the test. When the test is running, Run will be indicated in place of Stop. When the test ends, either Pass or Fault will appear next to Stop. 4. To stop the test at any time, press . OPP Test Function The load has a built-in OPP test function that can be used to automate testing for OPP conditions. The load can save up to 5 OPP test programs into internal memory, which can be recalled and run.
Delay. Step Delay Max Trip Power This is the delay time to hold each power step in the test. This determines how fast or slow to run through the test. This is the ending power value before OPP test ends. The test will only run through in steps from Start Power to the End Power if input voltage is greater than the OPP Voltage. This value is a limit that is used to test for OPP conditions.
6. Follow the same steps for Step Power and End Power. Press after each settings to continue. 7. 8. Enter a value for OPP Voltage and press to continue. Enter a value for Max Trip Power, and then Min Trip Power. Press 9. after each settings to continue. The load will prompt to Save OPP File. Select a number between 1 and 5. Then press to save all settings to the selected location.
OFF CC 0.000A 10.000V 0.0 0W 0. 00W Stop 3. Press to start the test. When the test is running, Run will be indicated in place of Stop. When the test ends, either Pass or Fault will appear next to Stop. 4. To stop the test at any time, press 3.10 . Key Lock The front panel keys can be locked to prevent unwanted changes to output settings and instrument configurations. Follow the steps below to enable/disable key lock. 1. Press and then .
4 Remote Operation 4.1 Interface Connection RS-232 For RS-232 connectivity, refer to the diagram below for pinout information. The RS-232 is labeled in the rear panel and it is a female DB-9 interface. 5 4 9 3 8 2 7 1 6 Table 6 - RS232 Pin Outs PIN 1 2 3 4 5 6 7 8 9 Description Transmit Data Receive Data GND CTS RTS - A straight pin-to-pin DB9 female to DB9 male serial cable is required for using the RS-232 interface. Do not use a null modem or crossover DB9 serial cable.
GPIB The load can be configured with a GPIB address from 0 – 31. To communicate via GPIB, connect a GPIB cable to the GPIB interface on the rear panel, as illustrated below. USBTMC The device is SR1, RL1, and DT1 enabled. It can receive the following request: REN_CONTROL, GO_TO_LOCAL, LOCAL_LOCKOUT. When it receives MsgID = TRIGGER USBTMC command, it will transmit TRIGGER command to the function layer. 4.2 Remote Commands The instrument supports some SCPI commands and some instrument specific commands.
5 Troubleshooting Guide Below are some frequently asked questions and answers. Please check if any apply to your instrument before contacting B&K Precision. General Q: I cannot power up the instrument. Check that the power cord is securely connected to the AC input and there is live power from your electrical AC outlet. Verify that the AC power coming from the mains have the correct voltage. The load can accept a specific range of AC input voltages. Refer to section “2.1”.
If the instrument is damaged, appears to be damaged, or if any liquid, chemical, or other material gets on or inside the instrument, remove the instrument's power cord, remove the instrument from service, label it as not to be operated, and return the instrument to B&K Precision for repair. Notify B&K Precision of the nature of any contamination of the instrument.
6 Specifications 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.
Models 8600 8601 8602 Transient Mode (CC mode) T1 & T2 1 20 µs – 3600 s / Resolution: 10 µs Accuracy 5 µs + 100 ppm Low Rate 0.001-2.5 A/ms 0.001-1 A/ms Slew 2 Rate High Rate 0.001-2.5 A/µs 0.001-1 A/µs Accuracy within 40 % of programmed value Measurement Readback Voltage Low 0 – 18 V 0 – 18 V 0 – 50 V Range High 0 – 120 V 0 – 120 V 0 – 500 V Low 0.1 mV Resolution High 1 mV Accuracy ±(0.025 %+0.025 % FS) Readback Current Low 0–3A 0–6A 0–3A Range High 0 – 30 A 0 – 60 A 0 – 15 A Low 0.01 mA 0.1 mA 0.
Notes: 1) Fast pulse trains with large transitions may not be achievable. 2) The slew rate specifications are not warranted but are descriptions of typical performance. The actual transition time is defined as the time for the input to change from 10% to 90%, or vice versa, of the programmed current values. In case of very large load changes, e.g. from no load to full load, the actual transition time will be larger than the expected time.
Dimensions and weight Dimensions (W x H x D) (excludes Model front and rear rubber bezels and side handle) Weight 8600 218 x 90 x 387 mm 4.5 kg 8601 218 x 90 x 387 mm 4.5 kg 8602 218 x 90 x 387 mm 4.5 kg Environmental Conditions: This instrument is designed for indoor use and operated with maximum relative humidity of ≤ 95%. The internal cooling fan speed is temperature controlled.
7 Calibration It is recommended that the instrument be returned to B&K Precision for service and periodic calibration to ensure the instrument is performing within its specifications. B&K Precision recommends calibrating the instrument once per year.
Index AC input, 10 Automatic Test, 59 Constant Current, 18 Constant Power, 23 Constant Resistance, 22 Constant Voltage, 20 Firmware Version, 15 Fuse, 11 Key Lock, 75 Line voltage input, 10 List mode, 54 Menu, 16 Remote sense, 45 Restore Factory Default, 25 RMT, 32 Self-test, 13 Short, 48 System Menu, 16 Transient operation, 49 Trigger Source, 27 Von Latch, 35 85
SERVICE INFORMATION Warranty Service: Please go to the support and service section on our website at 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 to the support and service section on our website at www.bkprecision.com to obtain a RMA #.
LIMITED THREE-YEAR WARRANTY B&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 three years from date of purchase. B&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.
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