BK Precision 8500 User Manual
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BK Precision 8500 User Manual

8500 series dc electronic loads
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USER MANUAL
8500 SERIES DC ELECTRONIC LOADS
Models 8500, 8502, 8510, 8512, 8514, 8518, 8520,
8522, 8524 & 8526
GlobalTestSupply
www.
.com
Find Quality Products Online at:
sales@GlobalTestSupply.com

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  • Page 1 USER MANUAL 8500 SERIES DC ELECTRONIC LOADS Models 8500, 8502, 8510, 8512, 8514, 8518, 8520, 8522, 8524 & 8526 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...

  • Page 2: Safety

    Do not proceed beyond a CAUTION sign until the indicated conditions are fully understood and met. 8500 DC Load Series Version: 042616 Page 2 of 76 GlobalTestSupply www.

  • Page 3: Table Of Contents

    Pulse transient operation......................36 Toggled transient operation......................37 Toggle between two test values....................38 Lists (dynamic condition)........................38 Test files............................40 Triggering............................42 8500 DC Load Series Version: 042616 Page 3 of 76 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
  • Page 4 Error messages during power-up......................71 Keypad unlock procedure (Keypad was accidentally locked)............71 Frequency Asked Questions......................72 Appendix: Service and warranty information..................74 Index..............................75 8500 DC Load Series Version: 042616 Page 4 of 76 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...

  • Page 5: Notation

    Shift key. Annunciator, value, or message shown on the vacuum fluorescent display. CONFIG Menu item Default menu item 8500 DC Load Series Version: 042616 Page 5 of 76 GlobalTestSupply www. .com Find Quality Products Online at:...

  • Page 6: Quick Reference

    5. Test report Optional accessories are: rack mount kit IT-E151 (available for models 8500, 8502, 8510, 8512, 8514, 8518) Overview of instrument The DC Load is a two terminal device that can be connected to DC sources. Here, a DC source is a voltage that is always positive on the DC Load's + terminal referenced to the - terminal.

  • Page 7: Typical Tasks

    Front panel The following picture is the front panel for the 8510 DC Load. All models have the same front panel, only the terminal section will vary based on the model. 8500 DC Load Series Version: 042616 Page 7 of 76 GlobalTestSupply www.
  • Page 8 Input terminals. Depending on the model, you will have different types and numbers of input terminals. Models 8500/8502 come with one plus and one minus terminal Models 8510/8512 come with two positive and two negative terminals however each terminal is able to sink the maximum current supported by the instrument.

  • Page 9: Standard Display

    Store the DC Load state in non-volatile memory. You may Shift + Store store 25 different states. Recall the DC Load state from non-volatile memory. You Shift + Recall may recall 25 different states. 8500 DC Load Series Version: 042616 Page 9 of 76 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...

  • Page 10: Rear Panel

    9-Pin serial port interface connector. NOTE: This port's terminals utilize 5 volt TTL logic signals. Do NOT connect an RS-232 cable with standard RS-232 voltages on the cables connectors. Doing so may damage the instrument and is 8500 DC Load Series Version: 042616 Page 10 of 76 GlobalTestSupply www.

  • Page 11: Power Requirements

    Constant resistance mode. PROT Not used. TRAN Transient operation is enabled. LIST List mode is initiated or running. SENSE Remote sensing is on. 8500 DC Load Series Version: 042616 Page 11 of 76 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...

  • Page 12: Menus

    Pressing a number key does not recall a setup. RANGE SELECT Change the precision of displayed values. Allows the user to select the instrument's range, giving better voltage and/or current resolution. Press Shift + △ 8500 DC Load Series Version: 042616 Page 12 of 76 GlobalTestSupply www.
  • Page 13 MAX POWER SET Set the maximum allowed power. Exceeding this value will cause the load to shut off. This value also becomes the maximum power you can set. 8500 DC Load Series Version: 042616 Page 13 of 76 GlobalTestSupply www.
  • Page 14 2 X 500 STEPS 1 X 1000 STEPS EXIT Return to prior menu level. LOAD ON TIMER Enable a timed load. TIMER STATE 8500 DC Load Series Version: 042616 Page 14 of 76 GlobalTestSupply www. .com Find Quality Products Online at:...
  • Page 15 Set the time period from 1 to 60000 s for the load to be TIMER SET EXIT Return to prior menu level. EXIT Return to standard display. 8500 DC Load Series Version: 042616 Page 15 of 76 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...

  • Page 16: Specifications

    Specifications Models 8500 & 8502 (300 W) Parameter 8500 8502 Voltage 0 – 120 V 0 – 500 V Input rating Current 0 – 30 A 0 – 15 A Power 300 W 8500/8502 common characteristics Parameter Range Accuracy Resolution...

  • Page 17: Environmental Conditions

    NOTE: Specifications and information are subject to change without notice. Environmental Conditions This instrument is intended for indoor use in a pollution degree 2 environment. Operating environmental limits are as follows: 8500 DC Load Series Version: 042616 Page 17 of 76 GlobalTestSupply www.

  • Page 18: Internal Resistances

    ≤ 30 8524 ≤ 6.5 8526 ≤ 15 Operational power curve The DC load's output follows a power curve illustrated below: 8500 DC Load Series Version: 042616 Page 18 of 76 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...

  • Page 19: Low Voltage Characteristics

    Note the gap between the operating region and the current axis for lower voltages. More detail is described in the following section. Low Voltage Characteristics The following graphs show the voltage/current relationships for low voltages: 8500 DC Load Series Version: 042616 Page 19 of 76 GlobalTestSupply www.

  • Page 20: Slew Rate

    Slew rate 8500 DC Load Series Version: 042616 Page 20 of 76 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
  • Page 21 The provided table below indicates measured slew rates based on the maximum range of current transition of the models are capable of. For example, model 8500's slew rate would be measured with current transition from 0 A to 30 A.
  • Page 22 0.5A / S 8512 1A/ S 8514 8518 1A/ S 1A/ S 8520 1A/ S 8522 1A/ S 8524 1A/ S 8526 8500 DC Load Series Version: 042616 Page 22 of 76 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...

  • Page 23: Glossary

    Manually toggle the instrument between its set mode and an infinite impedance state. P-set Configure the instrument for constant power mode. Power Power switch to turn the instrument on and off. 8500 DC Load Series Version: 042616 Page 23 of 76 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
  • Page 24 Trigger The key that causes an immediate trigger. V-set Configure the instrument for constant voltage mode. Vacuum fluorescent display, the technology used for the instrument's display. 8500 DC Load Series Version: 042616 Page 24 of 76 GlobalTestSupply www. .com Find Quality Products Online at:...

  • Page 25: Installation

    CAUTION Do not block the fan exhaust at the rear of the load. Outline Drawings All dimensions are in millimeters (mm). Models: 8500& 8502 8500 DC Load Series Version: 042616 Page 25 of 76 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
  • Page 26 Models 8510, 8512, 8514 & 8518 Models 8520, 8522 8500 DC Load Series Version: 042616 Page 26 of 76 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
  • Page 27 Models 8524 & 8526 Unit (mm) 8500 DC Load Series Version: 042616 Page 27 of 76 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...

  • Page 28: Bench Operation

    490W×357H×539D Bench operation The 8500 DC Load is provided with a carrying handle. The following pictures demonstrate various ways to use the handle. The handle may be removed if desired. A rack mounting kit (IT-E151) is also available for models 8500, 8502, 8510, 8512, 8514, and 8518.

  • Page 29: First Turn-On Checkout

    DC Load. Press the keys to see the power that is being consumed by the load. 8500 DC Load Series Version: 042616 Page 29 of 76 GlobalTestSupply www.

  • Page 30: Operational Introduction

    10 Ω for 1 second and 20 Ω for 3 seconds. Similar to the transient condition, but capable of emulating more complex time- Dynamic dependent loads. The dynamic condition uses lists to specify the time- dependent behavior. 8500 DC Load Series Version: 042616 Page 30 of 76 GlobalTestSupply www.

  • Page 31: Power-On State

    Shift + Menu :CONFIG Enter :INITIAL CONFIG ▽ :INPUT RECALL ▽ :POWER-ON RECALL Enter :OFF <DEFAULT> ▽ Enter :POWER-ON RECALL :CONFIG 8500 DC Load Series Version: 042616 Page 31 of 76 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...

  • Page 32: Constant Current Mode

    To operate the DC Load in CV mode in a transient condition, see the Transient operation section. To operate the DC Load in CV mode in a dynamic condition, see the Lists section. Constant power mode 8500 DC Load Series Version: 042616 Page 32 of 76 GlobalTestSupply www.

  • Page 33: Constant Resistance Mode

    The DC Load can be set to allow timed operation. When you turn the load on, it stays on for the specified time, then turns itself off. To set up timed operation, use the following keystrokes: 8500 DC Load Series Version: 042616 Page 33 of 76 GlobalTestSupply www.

  • Page 34: Changing Display Resolution

    Input to turn Off, provided the current limit is reached. This does not affect the programmed settings and the DC load will restore the previously programmed values once the Short condition is removed. Battery test 8500 DC Load Series Version: 042616 Page 34 of 76 GlobalTestSupply www.

  • Page 35: Transient Operation

    Continuous Transient Operation Note that this transient behavior works with any of the operation modes CC, CV, CW, or CR. Here are the keystrokes used to setup this continuous transient condition: 8500 DC Load Series Version: 042616 Page 35 of 76 GlobalTestSupply www.

  • Page 36: Pulse Transient Operation

    Enters the 5 A value, then displays WIDTH A = X.XMS. You're being prompted for the duration of the 5 A load. In the pulse mode of operation, 8500 DC Load Series Version: 042616 Page 36 of 76 GlobalTestSupply www.

  • Page 37: Toggled Transient Operation

    You are being prompted for the first current value. Press the 5 key for 5 A. Enter Enters the 5 A value, then displays WIDTH A = X.XMS. You're being 8500 DC Load Series Version: 042616 Page 37 of 76 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...

  • Page 38: Toggle Between Two Test Values

    CC list step can be configured as 1.234 A. To illustrate the use of a list, we'll create a list that runs the following constant current profile on a power supply: 8500 DC Load Series Version: 042616 Page 38 of 76 GlobalTestSupply www.
  • Page 39 "file" (i.e., block of EEPROM) to store this list to. Choose a number via the keypad or the knob. You can choose any number between 1-8. Enter :EDIT LIST FILE 8500 DC Load Series Version: 042616 Page 39 of 76 GlobalTestSupply www.

  • Page 40: Test Files

    Enter. Enter READBACK V We're being prompted for what parameter to read back and check. We want voltage, so we press Enter. 8500 DC Load Series Version: 042616 Page 40 of 76 GlobalTestSupply www.
  • Page 41 Shift Trigger This starts the test. You'll see the values sequentially displayed. Then you'll either see PASS or FAULT. You can press Shift Trigger again for 8500 DC Load Series Version: 042616 Page 41 of 76 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...

  • Page 42: Triggering

    SYSTEM SET:VOLTAGE OFF SET 0.0 V. As before, the load will turn on only when the voltage exceeds 1.0 V, but once it is "triggered" on, it will now stay on, even if the voltage drops to zero. 8500 DC Load Series Version: 042616...

  • Page 43: Passwords

    When operating in CR, CC or CW mode, the load current will be limited by a current limit value set by the user. The maximum current limit value is equal to the maximum rated current for each model. 8500 DC Load Series Version: 042616...

  • Page 44: Over Power Protection

    Enter :REMOTE SENSE and annunciator shows Sense. Esc Esc Exit from the menu. The following diagram shows the remote sensing terminals on the back of the instrument: 8500 DC Load Series Version: 042616 Page 44 of 76 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...

  • Page 45: Saving And Recalling Settings

    Note that this will overwrite all values currently set in the instrument. If you try to recall a register with no data in it, you will get a NO EEPROM DATA error message. 8500 DC Load Series Version: 042616 Page 45 of 76 GlobalTestSupply www.

  • Page 46: Remote Operation

    26 byte packet back from the DC Load to either Get the status of your submitted packet, or ● Get the data you requested. ● 8500 DC Load Series Version: 042616 Page 46 of 76 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...

  • Page 47: Status Packets

    Even for commands that request for data to be read back, if the command is incorrect, the status packet will also be received with one of the above status bytes. 8500 DC Load Series Version: 042616 Page 47 of 76 GlobalTestSupply www.
  • Page 48 = 38400 sp = serial.Serial(port, baudrate) # Open a serial connection # Construct a set to remote command = chr(0xaa) + chr(0x00) + chr(0x20) # First three bytes 8500 DC Load Series Version: 042616 Page 48 of 76 GlobalTestSupply www.
  • Page 49 The fourth byte is , which means the command completed 0x80 successfully. On the DC load, you should see the annunciator turned on immediately after running the script. 8500 DC Load Series Version: 042616 Page 49 of 76 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...

  • Page 50: Chapter Organization

    0x23 Read the maximum voltage allowed Maximum parameter 0x24 Set the maximum current allowed values 0x25 Read the maximum current allowed 0x26 Set the maximum power allowed 8500 DC Load Series Version: 042616 Page 50 of 76 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
  • Page 51 0x45 Read one of the step's power and time values 0x46 Set one of the step's resistance and time values 0x47 Read one of the step's resistance and time values 0x48 Set the list file name 8500 DC Load Series Version: 042616 Page 51 of 76 GlobalTestSupply www.
  • Page 52 0x66 Store the calibration data to EEPROM 0x67 Set calibration information 0x68 Read calibration information 0x69 Restore the factory default calibration data Product information 0x6A Get product's model, serial number, and firmware version 8500 DC Load Series Version: 042616 Page 52 of 76 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...

  • Page 53: Command Details

    4-24 Reserved Below is a table of all possible status byte values and their corresponding indication. 0x90 Checksum incorrect 0xA0 Parameter incorrect 8500 DC Load Series Version: 042616 Page 53 of 76 GlobalTestSupply www. .com Find Quality Products Online at:...
  • Page 54 Lower low byte of maximum voltage. 1 represents 1 mV. Lower high byte of maximum voltage. Upper low byte of maximum voltage. Upper high byte of maximum voltage. 8500 DC Load Series Version: 042616 Page 54 of 76 GlobalTestSupply www.
  • Page 55 213.45W translates to 213,450 in decimal. With 4 bytes in Hex, that would be 0x000341CA. Since the bytes are ordered in little-endian format, 0xCA would be the 3 byte, 0x41 the4 byte, 0x03 as 5 8500 DC Load Series Version: 042616 Page 55 of 76 GlobalTestSupply www.
  • Page 56 Lower high byte of current. Upper low byte of current. Upper high byte of current. 7-24 Reserved 0x2B Read CC mode current 8500 DC Load Series Version: 042616 Page 56 of 76 GlobalTestSupply www. .com Find Quality Products Online at:...
  • Page 57 Upper high byte of power. 7-24 Reserved 0x2F Read CW mode power Byte offset Meaning Lower low byte of power. 1 represents 1 mW. 8500 DC Load Series Version: 042616 Page 57 of 76 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
  • Page 58 13 to 14 Time for B current in units of 0.1 ms. Little-endian 2 byte number. Transient operation: 0 is CONTINUOUS 1 is PULSE 2 is TOGGLED 16-24 Reserved 0x33 Read CC mode transient parameters 8500 DC Load Series Version: 042616 Page 58 of 76 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
  • Page 59 Transient operation: 0 is CONTINUOUS 1 is PULSE 2 is TOGGLED 16-24 Reserved 0x36 Set CW mode transient power and timing 8500 DC Load Series Version: 042616 Page 59 of 76 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
  • Page 60 13 to 14 Time for B resistance in units of 0.1 ms. Little-endian 2 byte number. Transient operation: 0 is CONTINUOUS 1 is PULSE 2 is TOGGLED 16-24 Reserved 0x39 Read CR mode transient parameters 8500 DC Load Series Version: 042616 Page 60 of 76 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
  • Page 61 Meaning How lists repeat: 0 is ONCE 1 is REPEAT 4-24 Reserved 0x3D Read how lists repeat (ONCE or REPEAT) 8500 DC Load Series Version: 042616 Page 61 of 76 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
  • Page 62 3 to 4 2 byte little-endian integer specifying which step number in the list 5 to 8 4 byte little-endian integer specifying the voltage in units of 1 mV 8500 DC Load Series Version: 042616 Page 62 of 76 GlobalTestSupply www.
  • Page 63 9 to 10 2 byte little-endian integer specifying the step timing in units of 0.1 ms 11-24 Reserved 0x47 Read one of the step's resistance and time values 8500 DC Load Series Version: 042616 Page 63 of 76 GlobalTestSupply www.
  • Page 64 2 means 2 files of 500 list steps 4 means 4 files of 250 list steps 8 means 8 files of 120 list steps 4-24 Reserved 0x4C Save the list file 8500 DC Load Series Version: 042616 Page 64 of 76 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
  • Page 65 2 byte little-endian integer specifying the time in units of 1 second 5-24 Reserved 0x52 Disable/enable timer for LOAD ON Byte offset Meaning 0 is disable timer 1 is enable timer 8500 DC Load Series Version: 042616 Page 65 of 76 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
  • Page 66 Byte offset Meaning 0 means remote sensing is disabled 1 means remote sensing is enabled 4-24 Reserved 0x58 Select trigger source 8500 DC Load Series Version: 042616 Page 66 of 76 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
  • Page 67 0x5D Select FIXED/SHORT/TRAN/LIST/BATTERY function Byte offset Meaning Function: 0 means FIXED 1 means SHORT 2 means TRANSIENT 3 means LIST 4 means BATTERY 8500 DC Load Series Version: 042616 Page 67 of 76 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
  • Page 68 Remote sensing mode (1 means enabled) LOAD ON timer is enabled Reserved The demand state register's bit meanings are: Meaning Reversed voltage is at instrument's terminals (1 means yes) 8500 DC Load Series Version: 042616 Page 68 of 76 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
  • Page 69 Note: the bar code information is to be interpreted as ASCII data. Byte offset Meaning 3 to 5 Identity 6 to 7 7 to 9 Version 10 to 11 Year 12-24 Reserved 8500 DC Load Series Version: 042616 Page 69 of 76 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...

  • Page 70: Serial Number And Firmware Version

    Instrument's capabilities SN: XXX-XXX-XXX Serial number VER: X.XX Firmware version Press the Esc key to return to normal operation of the instrument. 8500 DC Load Series Version: 042616 Page 70 of 76 GlobalTestSupply www. .com Find Quality Products Online at:...

  • Page 71: In Case Of Trouble

    If you accidentally locked the keyboard, follow this procedure to unlock: The procedure below shows how to unlock a model 8500 using “8512” as the unlock key. 1) Press Shift + Menu. You will see PASSWORD: displayed on the screen. Enter 8512, then press the Enter key.

  • Page 72: Frequency Asked Questions

    Q: My load is rated for 30 A, but I cannot seem to adjust the current beyond 15 A. A: The 8500 series has a user configurable input limit protection that can be set from the front panel. To verify and edit these settings, press Shift + 0 to access the menu, then use the arrow keys or rotary knob to select SYSTEM SET menu.
  • Page 73 Shift + Down arrow to enable 0.1 mA resolution. Once set, go back to the PV8500 GUI soft panel and change the switch from Panel Control to PC control. 8500 DC Load Series Version: 042616 Page 73 of 76 GlobalTestSupply www.

  • Page 74: Appendix: Service And Warranty Information

    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. 8500 DC Load Series Version: 042616 Page 74 of 76 GlobalTestSupply www.

  • Page 75: Index

    I-set..............21 Transient mode..........21 List..........11, 13p., 21, 36 Trigger..........11pp., 22, 39 Local............11, 21 V-set..............22 △.................32 Menu............8, 12, 21 ▽.................21 Menu system.............10 Mode..............21 8500 DC Load Series Version: 042616 Page 75 of 76 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...

  • Page 76: Version: 042616

    22820 Savi Ranch Parkway Yorba Linda CA, 92887 Printed in China 8500 DC Load Series Version: 042616 Page 76 of 76 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...

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