INSTRUCTION MANUAL Model 8540 Model 8540 60V/30A/150W DC Electronic Load
WARNING Safety Regulations To avoid electrical shock, do not open the cabinet. Refer servicing to qualified personnel only. To avoid injuries, always disconnect power, discharge circuits, and remove external voltage sources before touching components. KEEP AWAY FROM LIVE CIRCUITS. We cannot accept responsibility for any direct or indirect financial damage or loss of profit that might occur when using the electronic load. The instrument chassis and cover must be connected to an electrical ground.
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.
Initial Check Unpacking the instrument This instrument was carefully inspected before shipment. Upon receipt, inspect the instrument for damage that might have occurred in transit. If any sign of damage is found, notify your B&K Precision distributor. Check the list of supplied items Verify that you have received the following items with your power supply. If anything is missing, contact your authorized B&K Precision distributor.
About the 8540 The B&K Precision 8540 DC electronic load (60V/30A/150W) can sink DC current in constant current, constant voltage, and constant resistance modes. Measured values have 10 mV and 1 mA resolution. Shorts can be simulated. Storage is provided for up to *40 groups, with 4 instrument setups per group. The instrument is easy to use and will find many uses for testing DC power supplies, batteries, and DC to DC converters.
Panel layout Setup indicator Voltage display indicator Voltage or preset current, voltage or resistance value Step B + memory B Step A + memory A Step C + memory C Step D + memory D CC mode indicator Recall indicator CV mode indicator Short indicator CR mode indicator 30A mode selector indicator Shift indicator Current or power value Power display indicator Input off indicator Current display indicator Memory save (shift) Recall (shift) Left arrow + memory A Right arrow + memory B Function setup (s
Quick Start Set the line voltage selector on the back panel to your local line voltage (110 VAC or 220 VAC). Change the fuse to the correct fuse according to the table under “Initial Check” section. Confirm that both changes are correct BEFORE connecting the power cord to the DC load and a wall power socket. Turn on the power to the DC load by flipping the power switch to “I” position. Set value Constant Current Mode Press the D Mode 8540 key to turn on the 150W DC Electronic Load CC LED.
Input on/off The load can be toggled on and off by pressing the On/Off key. The programmed setting is not affected. The OFF LED will be lit when the load is off. Change the displayed values The electronic load usually displays the actual voltage and current values. Press the C View key to display the preset voltage, current or resistance value and the actual power. Press the fC View key again to return to the current/voltage display.
Key sound (bEEP) 8540 150W DC Electronic Load Set Recall CC V Short CV W 30A CR A OFF Shift Set Recall CC V Short CV W 30A CR A OFF Shift Set Recall CC V Short CV W 30A CR A OFF Shift C View Press again to turn the key sound ON or OFF (bEEP). Use the rotary knob to make your selection. A B C Set address (Add) Press C View twice to skip the address menu and advance to the next menu.
Store Operation To save the load’s settings to a register (internal memory), press the Shift and A (Save) keys. The A B C D LEDs will blink together. Press the A or B or C View or D Mode keys to save the settings to non volatile memory. Pressing A will store to A location. B to B location. C to C location. D to D location. Hence, users can save up to four settings in each group. Note you may do this for any of the 40 different groups assigned in the previous paragraph (Choose Storage Group).
LIST mode (for firmware version 1.60 or above only) LIST mode is an added feature applicable for newer firmware versions of 8540, specifically version 1.60 or above. This feature allows users to program a list of sequence steps that may be useful in some automated test applications or Go/No Go type of testing. This feature can only be used when the load is booted into this mode.
Setup List Parameters Below is an example with step by step instructions on setting up a sequence using list modes. Step 1 – Select step number to program If not already, boot the instrument into LIST mode by holding the B key while switching on the power button. Press Shift , then C View to enter the LIST menu for programming LIST parameters. The display will look like the one on the right. If you want to program from the first step, leave it shown on the bottom display as 0.
Step 3 – Select step value Select the data value you want programmed for the selected step. If you enter 0.000, this denotes the end of the sequence and it will stop on this step. The maximum value will depend on the type selected in previous step. See programmable range on the right for reference. In this example, we will enter 1.000 A. Press to go and configure View the nextCparameter. 8540 150W DC Electronic Load A B C D Recall CC V Short CV W 30A CR A OFF Shift Programmable Range: 0.
Step 5 – Select upper limit of input voltage 8540 150W DC Electronic Load Set Recall CC Short CV V This parameter is used to limit testing or test setups that must stay within a A C B D CR 30A customized range of values. Change W this value to the upper bound limit for A OFF Shift the input voltage. If voltage exceeds this limit while the sequence is running this step, it will stop and show an error condition. See “Error Condition” section for details. In this Programmable Range: 0.00 – 60.
Step 7 – Select upper limit of input current 8540 150W DC Electronic Load Set Recall CC Short CV Recall CC V This parameter is used to limit testing or test setups that must stay within a A C B D CR 30A customized range of values. Change W this value to the upper bound limit for A OFF Shift the input current. If current exceeds this limit while the sequence is running this step, it will stop and show an error condition. See “Error Condition” section for details. In this Programmable Range: 0.
Step 9 – Repeat step configurations Repeat steps 1-8, except in step one, select step number as an increment to the next step. Create a sequence of 5 steps with the following parameters: Steps Type 1 2 3 4 CV CR CC CC Data Value Delay Time 2.000 V 10.00 Ω 2.000 A 0.000 A 5s 5s 5s 5s Upper Voltage Limit Lower Voltage Limit Upper Current Limit Lower Current Limit 60.00 V 60.00 V 60.00 V 60.00 V 0.00 V 0.00 V 0.00 V 0.00 V 30.00 A 30.00 A 30.00 A 30.00 A 0.00 A 0.00 A 0.00 A 0.
Run Programmed Sequence After programming and saving the sequence(s), you can start running those sequences by doing the following (Only 25 steps can be run at one time): - Press - Press - Press - Press A B C D key to run programmed steps 0 to 24. key to run programmed steps 25 to 49. View key to run programmed steps 50 to 74. Mode key to run programmed steps 75 to 99. When sequence is running, a beep sound will occur whenever it jumps to the next step.
Knob incremental values The following table shows the incremental changes in the set value when the knob is turned corresponding to which “cursor” LED is lit. Cursor position A B C D Voltage Increment 10 V Current Increment Range Increment 0-3 A 1A 0-30 A 10 A 0-3 A 0.1 A 0-30 A 1A 0-3 A 0.01 A 0-30 A 0.1 A 0-3 A 0.001 A 0-30 A 0.01 A 1V 0.1 V 0.01 V Resistance Increment Range Increment 0.1-10 Ω 1Ω 10-99 Ω 10 Ω 100-999 Ω 100 Ω 1000-4000 Ω 1000 Ω 0.1-10 Ω 0.
Specifications Parameter Input rating ( 0 - 40 Ԩ) Load Regulation CV Mode Regulation CC Mode Regulation CR Mode Regulation Current Measurement Voltage Measurement Power Measurement 8540 Voltage 0 – 60 V Current 1 mA – 30 A Power 150 W Range Accuracy Resolution 0-10 V ±(0.05%+0.1%FS) 1 mV 0-60 V ±(0.05%+0.1%FS) 10 mV 0-3 A ±(0.1%+0.1%FS) 1 mA 0-30 A ±(0.1%+0.15%FS) 10 mA 0.1-60 V ±(0.05%+0.1%FS) 10 mV 0-3 A ±(0.1%+0.1%FS) 1 mA 0-30 A ±(0.1%+0.15%FS) 10 mA 0.
Warranty Service Information Warranty Service: Please go the service and support 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 service and support section on our website www.bkprecision.com to obtain a RMA #.
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