B&K Precision 866C Manual do Utilizador Página 1

USER MANUAL8500 SERIES DC ELECTRONIC LOADSModels 8500, 8502, 8510, 8512, 8514, 8518, 8520, 8522, 8524 & 8526

Shift + Menu Enter the instrument's menu system.Shift + Short Turn short circuit on or off.Shift + Tran Start or stop transient condition.Shift +

not covered by warranty.4Line voltage selection switch (110 VAC or 220 VAC)Display annunciatorsAnnunciator MeaningOFF The load is off.UNREG The input

Lvl Menu item Function2 INITIAL CONFIG Return instrument to factory default settings.2 POWER-ON RECALL Power on state of instrument.3 ON Remembers sta

Lvl Menu item Function2 BAUDRATE SET Set the serial bus connection speed.348003 96003 192003 384002 COMM. PARITY SET Serial connection parity.3NONE3 E

Lvl Menu item Function4 REPEAT List is repeatedly executed after the trigger is received.3 VOLTAGE LIST4 ONCE List is executed once per trigger.4 REPE

SpecificationsModels 8500 & 8502 (300 W)Parameter 8500 8502Input rating Voltage 0 to 120 V 0 to 500 V Current 1 mA to 30 A 1 mA to 15 A

Models 8520/8522/8524/8526 (2400W & 5000W)Parameter 8520 8522 8524 8526Input rating Voltage 0 – 120 V 0 – 500 V 0 – 60 V 0 – 500 VCurrent 0 – 240

Parameter SpecificationHumidity ≤ 95% relative humidity, non-condensingAltitude ≤ 2000 mAC Line voltage220 AV±10%，47～63 Hz110 AV±10%，47～63 HzOperating

The curved portion is where the dissipated power is at the rated power of the instrument (and is actually a hyperbolic shape). When you use the menu

Slew rateThe slew rate for each DC load varies from model to model. The variations are also dependent on the different regions measured for each indi

SafetyThe following general safety precautions must be observed during all phases of operation of this instrument. Failure to comply with these precau

As a reference, below is a table of slew rates for their respective models:Model Slew rate85000.5A / S85020.5A / S85101A/ S85120.5A / S85141A/ S8

Glossary△ Up arrow key. Used to scroll through the menu or cause the temporary display of the alternate standard display.▽ Down arrow key. Used to s

R-set Configure the instrument for constant resistance mode.Recall Recall instrument state from non-volatile memory.Remote sensing Allows the instrume

InstallationInspectionItems you should have receivedWhen you open the box containing the instrument, you should find the following items:1. The DC Loa

Models 8510, 8512, 8514 & 8518Models 8520, 85228500 DC Load Series Version: November 4, 2008 Page 24 of 76

Models 8524 & 8526Unit (mm)8500 DC Load Series Version: November 4, 2008 Page 25 of 76

Model number Dimensions in mm Mass in kg8500 215W×88H×355D 5.28502 215W×88H×355D 5.28510 429W×88H×355D 148512 429W×88H×355D 148514 429W×88H×355D 14851

First turn-on checkoutCAUTIONEnsure that the line voltage selector switch on the back panel is set to match your line voltage. Failure to do so could

watt.Press the R-set button (you may have to press it twice). Set the resistance to 100 Ω. Press the On/Off key. Verify that the current is approx

Power-on stateThe default power-on instrument state is to not remember the instrument mode settings before the last power-down. If you wish to have t

Table of ContentsSafety...

Key DisplayI-set If you press this key after powering up and there is no currently-stored constant current value, you'll be prompted for the desi

Key Displaypower level. If there was a power value already stored, it will be momentarily displayed and the instrument will be in CW mode. If you wi

Key DisplayEnter :TIMER STATEEnter Use arrow keys to set to :ON.▽ :TIMER SETEnter TIMER=XXXXXS Enter desired time interval. Valid values are 1 to 60

the battery) in ampere*hours (A*hrs) of the battery is calculated and displayed. To run a battery test, follow these steps:Key presses DisplayI-set,

Keys DisplayShift + S-Tran LEVEL A= X.XXXA You are being prompted for the first current value. Press the 5 key for 5 A.Enter Enters the 5 A value, th

Keys Displaycurrent value. Press the 1 and 0 keys to enter 10 A.Enter Enters the 10 A value, then displays WIDTH B = X.XMS. You're being promp

Keys DisplayEnter Displays LEVEL B= X.XXXA. You are being prompted for the second current value. Press the 1 and 0 keys to enter 10 A.Enter Enters t

Current, A Duration, ms Between times3 1000 0 and 10 800 1 and 22 500 2 and 30 300 3 and 46 500 4 and 5This list has 5 steps, located at the transitio

modes, mode parameters, and durations. They are useful for executing a set of tests on a device, then displaying whether the tests passed or failed.

Keys Display2.5 Enter SHORT OFF We select short on and then press Enter. Enter▽ READBACK A We want to readback the current, so we press Enter.Enter

Triggering...39

Trigger Type Explanationfront panel keys.EXTERNAL An external trigger is a TTL high signal applied to the Trigger connection on the back panel. This

front panel using the I-set, V-set, P-set, or R-set keys.To set these protection values, use the following keystrokes:Keys DisplayShift + Menu :CONFIG

reversed polarity. If a reverse voltage condition is detected, the buzzer will sound and REVERSE VOLTAGE will be displayed on screen.Over Temperature

Example: A power supply is connected to the DC load with 72.5 cm of 20-gauge solid copper wires. The constant current i set to 5 A. The power supply

Remote operationCommunication cablesThe DC Load has a DB9 connector on the rear panel that allows remote communication.WARNINGDo not connect the DC Lo

This COM port can then be accessed as if it were a regular RS-232 port.The LEDs in the adapter will blink when information is being sent through the a

The checksum number is the arithmetic sum of each of the bytes modulo 256.Status packetsWhen you send a command that does not cause the DC Load to sen

print " ", s = "%02x" % ord(bytes[i]) if s == "00": s = chr(250)*2 print s,

Here are the printed results when the above script is ran:Set to remote command: aa ·· 20 01 ·· ·· ·· ·· ·· ·· ·· ·· ·· ·· ·· ·· ·· ·· ·

example programs. The Summary of commands section is a list of the commands, but without details. The Command details section explains how to use ea

NotationI-set Represents a key on the front panel. Note that some of these may be accessed in combination with the Shift key.OFF Annunciator, value,

Command Group Byte ActionList operations0x3A Select the list operation (CC/CV/CW/CR)0x3B Read the list operation (CC/CV/CW/CR)0x3C Set how lists repea

Command Group Byte Action0x5C Recall DC Load's settingsFunction0x5D Select FIXED/SHORT/TRAN/LIST/BATTERY function0x5E Get function type (FIXED/SH

Least significant two bytes, most significant byte Lower high byteMost significant two bytes, least significant byte Higher low byteMost significant t

Byte offsetMeaning4 Lower high byte of maximum voltage.5 Upper low byte of maximum voltage.6 Upper high byte of maximum voltage.7-24 ReservedExample:

Byte offsetMeaning5 Upper low byte of maximum current.6 Upper high byte of maximum current.7-24 Reserved0x26 Set the maximum power allowedByte offse

Byte offsetMeaning3 Mode:0 is CC1 is CV2 is CW3 is CR4-24 Reserved0x2A Set CC mode current Byte offsetMeaning3 Lower low byte of current. 1 represe

Byte offsetMeaning4 Lower high byte of voltage.5 Upper low byte of voltage.6 Upper high byte of voltage.7-24 Reserved0x2E Set CW mode powerByte offs

Byte offsetMeaning5 Upper low byte of resistance.6 Upper high byte of resistance.7-24 Reserved0x32 Set CC mode transient current and timing Byte off

Byte offsetMeaning0 is CONTINUOUS1 is PULSE2 is TOGGLED16-24 Reserved0x35 Read CV mode transient parametersByte offsetMeaning3 to 6 Value A of volta

Byte offsetMeaning15 Transient operation:0 is CONTINUOUS1 is PULSE2 is TOGGLED16-24 Reserved0x38 Set CR mode transient resistance and timingByte off

Quick referenceModel numbers covered by this documentThe B&K Precision DC Loads covered by this manual are:● 8500● 8502● 8510● 8512● 8514● 8518●

Byte offsetMeaning3 is constant resistance (CR)4-24 Reserved0x3B Read the list operation (CC/CV/CW/CR)Byte offsetMeaning3 List operation mode:0 is c

0x40 Set one of the step's current and time valuesByte offsetMeaning3 to 4 2 byte little-endian integer specifying which step number in the lis

0x45 Set one of the step's power and time valuesByte offsetMeaning3 to 4 2 byte little-endian integer specifying which step number in the list5

Byte offsetMeaning3 Partition scheme:1 means 1 file of 1000 list steps2 means 2 files of 500 list steps4 means 4 files of 250 list steps8 means 8 file

Byte offsetMeaning7-24 Reserved0x50 Set timer value of for LOAD ONByte offsetMeaning3 to 4 2 byte little-endian integer specifying the time in units

Byte offsetMeaning1 means to enable the Local key on the front panel4-24 Reserved0x56 Enable/disable remote sensingByte offsetMeaning3 0 means to di

Byte offsetMeaning3 Storage register, a number between 1 and 25 inclusive4-24 Reserved0x5C Recall DC Load's settingsByte offsetMeaning3 Storage

The operation state register's bit meanings are:Bit Meaning0 Calculate the new demarcation coefficient1 Waiting for a trigger signal2 Remote cont

Byte offsetMeaning3 Calibration protection state:Bit 0: value of 0 means the calibration state is not protectedBit 0: value of 1 means the calibrati

The stored calibration data will be used the next time the DC Load is power cycled.0x67 Set calibration informationByte offsetMeaning3 to 22 ASCII i

whose resistance doesn't change as a function of current or voltage).The DC Load can present dynamically changing loads to the DC source with mil

Byte offsetMeaning12-24 Reserved8500 DC Load Series Version: November 4, 2008 Page 70 of 76

Serial number and firmware versionTo find out the serial number and firmware version of the DC load, turn the instrument on. While the SYSTEM SELFTES

In case of troubleInstrument won't turn onIf the instrument won't turn on when the POWER switch is pressed in, please ensure the power cord

Enter again. Now the password is cleared. Press Esc to exit the menu To unlock the other DC load models, use the following unlock keys:Model number

Appendix: Service and warranty information SERVICE INFORMATION Warranty Service: Please go to the service and support section on our website www.bkp

IndexAlphabetical IndexBattery...21Battery test...

22820 Savi Ranch Parkway Yorba Linda CA, 92831Printed in China8500 DC Load Series Version: November 4, 2008 Page 76 of 76

6123 4 5Button Function(s)116-character display shows voltage and current measurements.2Rotary knob. Turn to adjust a setting value. Press in to to

Standard displayThe standard display for the instrument is the voltage and current at the instrument's terminals. You may press the △ or ▽ keys