Bk-precision 8500-8526 - Manual Manual do Utilizador

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)*For models 8524 and 8526, the line voltage switch is not usable and does

Annunciator MeaningLIMIT Not used.ERROR An error has occurred.LINKThe instrument is communicating with an IT-E131 or IT-E132 communications adapter.

Lvl Menu item Functionbetter voltage and/or current resolution. Press Shift + △or Shift + ▽ to toggle resolutions.3OFFCurrent and voltage measurement

Lvl Menu item Functionthe maximum power you can set.2 MAX VOLTAGE SETSet the maximum allowed voltage. Exceeding this value will cause the load to shu

Lvl Menu item Function2 TIMER STATE3 ONWhen the load timer is enabled by this menu element, the load is turned on when the On/Off key is pressed. Aft

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 ratingVoltage 0 – 120 V 0 – 500 V 0 – 60 V 0 – 500 VCurrent 0 – 240

Parameter SpecificationHumidity ≤ 95% relative humidity, non-condensingAltitude ≤ 2000 mAC Input *220 ACV ± 10%，47～63 Hz 110 ACV ± 10%，47～63 HzOperati

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

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

Slew rate8500 DC Load Series Version: 030614 Page 20 of 77

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

Model Slew rate85000.5A /  S85020.5A /  S85101A/  S85120.5A /  S85141A/  S85181A/  S85201A/  S85221A/  S85241A/  S85261A/  S8500 DC Load Ser

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: 030614 Page 26 of 77

Models 8524 & 8526Unit (mm)8500 DC Load Series Version: 030614 Page 27 of 77

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

Table of ContentsSafety...

Press the V-set button (you may have to press it twice). Note the load is turned off. Set the power supply to 10V and the supply's current to a

Examples of the three conditions of operation are illustrated in the following diagram:Power-on stateThe default power-on instrument state is to not r

Key DisplayEsc Standard voltage/current displayConstant current modeIn constant current mode, the DC load will sink a constant current, regardless of

In constant power mode, the DC load will cause a constant power to be dissipated in the load. To set up the DC Load to operate in constant power mode

Key DisplayShift + Menu :CONFIG△ △ :LOAD ON TIMEREnter :TIMER STATEEnter Use arrow keys to set to :ON.▽ :TIMER SETEnter TIMER=XXXXXS Enter desired t

The battery test feature measures the time it takes for a battery voltage to drop to a specified value while drawing a constant current from the batte

Keys DisplayI-set Standard display of voltage and current (or, you'll be asked to enter a current value).Shift + S-Tran LEVEL A= X.XXXA You are

Keys Displaythis width is ignored, so enter any convenient value.Enter Displays LEVEL B= X.XXXA. You are being prompted for the second current value.

Keys Displayprompted for the duration of the 5 A load. In the toggled mode of operation, this width is ignored, so enter any convenient value.Enter D

Trigger10 2 3 4 5List count=1 List count=2List sequenceThis list is characterized by the following current/duration pairsCurrent, A Duration, ms Betwe

Voltage threshold operation...42Passwords..

Keys DisplayEsc Esc Standard displayFirst, press the On/Off key. The load will sink the current that is stored as the CC mode parameter (set it to 0

Keys DisplayEnter MIN 1= 5.80V We want the minimum voltage read back to be at least 4.4 V.4.4 Enter MAX 1= 6.15V The maximum value we'll allow

Keys Displayanother test run or press Esc to return to the normal display.Esc Return to the normal display.TriggeringTriggering is used with the trans

Shift + AShift + BShift + ShortShift + TranShift + TriggerOn/OffTo remove the password, enter the menu CONFIG:KEY LOCK SET and do not press any number

flashing current value.Over Power protection If the input power exceeds the power limit in the normal operation mode, the DC load will enter the over

The following shows a wiring diagram for remote sensing:Example: A power supply is connected to the DC load with 72.5 cm of 20-gauge solid copper wir

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

if i % 10 == 0 and i != 0: print print header, if i % 5 == 0: print " ", s = "%0

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,

You can download a complete python program along with detailed documentation from our website at www.bkprecision.comHere are the printed results when

Chapter organizationThe remainder of this chapter contains a reference on the syntax of DC Load commands and some example programs. The Summary of co

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

Most significant two bytes, least significant byte Higher low byteMost significant two bytes, most significant byte Higher high byteAs an example, for

ByteoffsetMeaning5 Upper low byte of maximum voltage.6 Upper high byte of maximum voltage.7-24 ReservedExample: Suppose you want to set the maximum vo

ByteoffsetMeaning5 Upper low byte of maximum current.6 Upper high byte of maximum current.7-24 Reserved0x26 Set the maximum power allowedByteoffsetM

ByteoffsetMeaning3 Mode:0 is CC1 is CV2 is CW3 is CR4-24 Reserved0x2A Set CC mode current ByteoffsetMeaning3 Lower low byte of current. 1 represent

ByteoffsetMeaning4 Lower high byte of voltage.5 Upper low byte of voltage.6 Upper high byte of voltage.7-24 Reserved0x2E Set CW mode powerByteoffset

ByteoffsetMeaning5 Upper low byte of resistance.6 Upper high byte of resistance.7-24 Reserved0x32 Set CC mode transient current and timing Byteoffse

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

ByteoffsetMeaning0 is CONTINUOUS1 is PULSE2 is TOGGLED16-24 Reserved0x35 Read CV mode transient parametersByteoffsetMeaning3 to 6 Value A of voltage

ByteoffsetMeaning15 Transient operation:0 is CONTINUOUS1 is PULSE2 is TOGGLED16-24 Reserved0x38 Set CR mode transient resistance and timingByteoffse

ByteoffsetMeaning3 is constant resistance (CR)4-24 Reserved0x3B Read the list operation (CC/CV/CW/CR)ByteoffsetMeaning3 List operation mode:0 is con

0x40 Set one of the step's current and time valuesByteoffsetMeaning3 to 4 2 byte little-endian integer specifying which step number in the list

0x45 Read one of the step's power and time valuesByteoffsetMeaning3 to 4 2 byte little-endian integer specifying which step number in the list5

ByteoffsetMeaning3 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 files

ByteoffsetMeaning7-24 Reserved0x50 Set timer value of for LOAD ONByteoffsetMeaning3 to 4 2 byte little-endian integer specifying the time in units o

ByteoffsetMeaning1 means to enable the Local key on the front panel4-24 Reserved0x56 Enable/disable remote sensingByteoffsetMeaning3 0 means to disa

ByteoffsetMeaning3 Storage register, a number between 1 and 25 inclusive4-24 Reserved0x5C Recall DC Load's settingsByteoffsetMeaning3 Storage r

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

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

ByteoffsetMeaning3 to 5 Identity6 to 7 Sub7 to 9 Version10 to 11 Year12-24 Reserved8500 DC Load Series Version: 030614 Page 70 of

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

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

Q: I have configured my load and turned on the input, but nothing seems to be sinking. The current shows 0.00 A as if nothing is happening.A: There

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, 92887Printed in China8500 DC Load Series Version: 030614 Page 77 of 77

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