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Gossen MetraWatt K852A, Руководство по эксплуатации

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Gossen Metrawatt GmbH

2

Functions and Features

2.1

Front Panel Operation („Local“) and Remote Control Operation

SPL Series electronic load can be controlled via the keypad and knobs in the front panel, or by remote controller via remote interface. If 
it is needed to control the load via the front panel, the load has to stay in local control status. Local (front panel) control is in effect 
immediately after power is applied. The REM indicator is turned on, and remote control goes into effect as soon as the load receives a 
SYSTem:REMote command via RS232, USB or GPIB interface. 
Under remote control status, all operations on front panel keypad and knobs become invalid (except 

 key and 

 

key ). All 

operations on electronic load are controlled by remote controller. The electronic load will return to local control and REM remote control 
indicator is turned off after receiving the return command (SYSTem:LOCal). 

Alternatively, you can return the electronic load to local control by pressing 

 

key and 

 

key. 

Details of local operation are covered in Chapter 4 „Local Operation“ and fundamentals of remote programming are given in Chapter 5 
„Remote Programming Operation“. 

Complete SCPI programming details are given in the SCPI Programming Guide for SPL Loads.

2.2

Programmable Functions

•

CC (constant current) Mode: CCL, CCH 

•

CV (constant voltage) Mode: CV 

•

CR (constant resistance) Mode: CRL, CRM, CRH 

•

CP (constant power) Mode: CPV, CPC 

•

Transient Operation: Tran 

•

List Operation: LIST  

•

Battery Discharge Operation: BATTERY 

•

Short Circuit Operation (Short) 

2.3

Basic Test Functions

There are four basic test functions: 

•

Constant current (CC), 

•

Constant voltage (CV), 

•

Constant resistance (CR),

•

Constant power (CP).

The operating mode and the associated parameters can be set via front panel or remote command. The load will remain in current 
mode until the mode is changed. If the mode is changed when the load’s input is in ON status, the load will be turned off for around 
5 milliseconds automatically. 

The setting values for electronic load become effective immediately when the load is turned on. If the input set value exceeds the 
allowed range, it will be automatically limited at maximum value or minimum value.

Содержание K852A

Страница 1: ...Operating Instructions KONSTANTER SPL Series Programmable DC Electronic Load 3 349 702 03 3 12 20 ...

Страница 2: ... 2 Environment Installation Location 30 3 3 Power On Self Test 30 3 4 Connections on the Rear Panel 31 3 5 Connections on the Front Panel 32 3 6 Wiring 32 4 Local Operation 33 4 1 Local Control 33 4 2 Main Operation on the Front Panel 33 4 3 Connecting to the Power Supply 33 4 4 Turning the Input On Off 33 4 5 Basic Operation 33 4 5 1 CC Mode 34 4 5 2 CV Mode 35 4 5 3 CR Mode 36 4 5 4 CP Mode 37 4...

Страница 3: ...oviders Connecting the Power Cable 1 Examine the voltage selector switch on the back of the device in order to assure that the selected voltage coincides with available mains power If this is not the case observe the note printed on the device s mains inlet plug and make sure that the correct fuse is utilized 2 The on off switch in the device s front panel must be switched off before the power sup...

Страница 4: ...ed current Perfect protection assures high reliability in the most complicated test environments Innovative design of CPV and CPC modes effectively improves the practicability of CP mode Circuit improvement greatly enhances the dynamic response of CR mode and widens the application scope of that mode High speed transient operation with separate setting options for high and low level rise and fall ...

Страница 5: ...eys are printed in blue To use the secondary function please press key first then press the relevant key 1 LCD 2 Function key 3 Power switch 4 External trigger input terminal 5 Remote sense terminal 6 Input bindiing ports 7 Knob 8 Entry keys Secondary function keys 9 LED displays remote and fault status 10 Function selector switch key 11 Left Right key 12 Up Down keys display selector switch key 1...

Страница 6: ... sequence Trigger key Clear ProtClear key to quit the selected menu Menu key for main menu Tran key for transient operation Set key for operating mode Parameter Input on off key Enter key represented as Enter in the manual Left cursor key represented as in the manual Right cursor key represented as in the manual Up cursor key represented as in the manual Down cursor key represented as in the manua...

Страница 7: ...ode Current fall rate Trig Function Tran List Trigger function selection Transient test Sequence test list Knob On Off Enable disable knob function On Off Key Sound On Off Enable disable key sound On Off Interface RS232 USB GPIB Remote interface selection RS232 USB GPIB RS232 interface Baud rate 2400 4800 9600 19200 38400 Baud rate setting 2400 4800 9600 19200 38400 Parity Check None Even Odd Pari...

Страница 8: ...E CPC POWR 0 000W Constant power current source mode Immediate power level Function Description Example LevelL Transient low level 1 000 A LevelH Transient high level 2 000 A TimeL Time for transient low level 600 00 ms TimeH Time for transient high level 600 00 ms TimeR Time for transient rising edge 0 01 ms TimeF Time for transient falling edge 0 01 ms MODE Continuous Cont Pulse Puls Toggle Togg...

Страница 9: ...s of the load ON OFF CV Mode The first line shows measured voltage and current levels The second line shows voltage setpoint CV mode and input status of the load ON OFF CR Mode The first line shows measured voltage and current levels The second line shows resistance level CR mode CRL indicates constant resistance low range CRM indicates constant resistance medium range and CRH indicates constant r...

Страница 10: ...shows measured voltage and current levels The second line shows setpoint level transient operation mode t stands for transient and input status of the load ON OFF List Operation The first line shows measured voltage and current levels The second line shows setpoint sequence operation mode L indicates list test and input status of the load ON OFF Battery Discharge Operation The first line shows mea...

Страница 11: ...line shows setting value and power level Protection Status If the protection function has been activated LCD will display corresponding protection status Example The display of reverse voltage protection status is shown as below Protection status includes overcurrent OC overvoltage OV overpower OP over temperature OT load protection PT and reverse voltage RV 1 8 Remote Programming The commands are...

Страница 12: ...ing key and key Details of local operation are covered in Chapter 4 Local Operation and fundamentals of remote programming are given in Chapter 5 Remote Programming Operation Complete SCPI programming details are given in the SCPI Programming Guide for SPL Loads 2 2 Programmable Functions CC constant current Mode CCL CCH CV constant voltage Mode CV CR constant resistance Mode CRL CRM CRH CP consta...

Страница 13: ...ue in CC mode which can be programmed via mode selection and parameter setting menu or via remote command CURRent NRf The immediate current level can also be modified directly with cursor keys and the knob 2 3 1 3 Triggered Current Level The triggered current level refers to the preset current value which can become immediate current level automatically when a trigger is received If the CC mode an...

Страница 14: ...and the knob in CV mode 2 3 2 3 Triggered Voltage Level The triggered voltage level refers to the preset voltage value which can become immediate voltage level automatically when a trigger is received If the CV mode and the input are enabled the input will be updated immediately when a trigger occurs If the CV mode is not active this voltage level will have no effect on the input until the CV mode...

Страница 15: ...ll change to the maximum level 2 0000 Ω for CRL 2 3 3 2 Immediate Resistance Level The immediate resistance level refers to the resistance setpoint value in CR mode which can be set via mode selection and parameter setting menu or via remote command RESistance NRf The immediate resistance level can also be modified directly with the keys and the knob in CR mode 2 3 3 3 Triggered Resistance Transit...

Страница 16: ... test a part of the cur rent voltage curve to know whether the two curves constant power curve and current voltage curve intersect Therefore when the set power is larger than the actual power the external power supply will not be short circuited by the load for the insufficient power When the load detects that the power of the external power supply is insufficient it will try to find constant powe...

Страница 17: ...rating mode that needs transient test Attention In transient operation the operating mode cannot be changed Attention In transient test the Von point and current limit should be taken into consideration which may cause the shut down of the input thus interrupting the transient test 2 4 1 Continuous Transient Operation In continuous operation the load periodically switches between high low levels T...

Страница 18: ... TRANsient HTIMe NRf TRANsient RTIMe NRf TRANsient FTIMe NRf TRANsient MODE PULSe Low level time TimeL has no influence on pulsed transient mode In order to get a pulse an explicit trigger is required The trigger can be an external trigger signal received via the TRIG input on the front panel pressing the key and key via GPIB function GET or via the common command TRG or the subsystem com mand TRI...

Страница 19: ... and remains at 10A for 500 μs Then after 200 μs duration of falling edge the current returns to the transient low level 5A Figure 2 7 Pulsed transient operation LevelL 5 000A LevelH 10 000A TimeH 0 50ms TimeR 0 10ms TimeF 0 10ms Mode Puls SCPI Command Description TRIG SOUR EXT Selects the external trigger input TRAN ON Enables transient operation TRAN LLEV 5 Sets transient current low level to 5 ...

Страница 20: ...command TRIG For example assume that the CCH range is active and the input is in OFF status then the transient parameters should be set as fol lows Press the key to enter into transient operation Press the key to open transient operation menu Set the following parameters in transient operation menu Then press the key to turn on the input Alternatively set the parameters via remote command Get the ...

Страница 21: ...or via remote command The load provides convenient list editing functions When the user is operating input edit sequence step it is easy to check the previous and subsequent steps and it is allowed to edit insert and delete immediately which simplifies the list input operation effectively The set value of each step will be automatically saved when exiting from step edit menu and the other list par...

Страница 22: ... The short circuit operation can be enabled and disabled by setting in the main menu or via the remote command INPut SHORt ON OFF The other set values will not be changed when the short circuit operation is enabled The short circuit value depends on the present operating mode of the load and the short circuit value for each model is shown as follows Example for SPL 400 40 CCL Short Circuit Current...

Страница 23: ...ce with the preset transient parameters when the toggled transient operation is active Triggering a list test Enable the present list test when the list operation is active Three triggering methods are available for remote control GPIB GET signal the TRG and TRIGger commands The external trigger input terminal and key key on the front panel of the load can be used to trigger as well The load has t...

Страница 24: ...nput voltage reaches or exceeds the Von Point Von Latch is used to latch the active status of the load If the Von Latch function is enabled once the input voltage reaches Von Point the input will be turned on and stay in ON sta tus regardless of the changes from the external input voltage even though the input voltage is less than the Von point Please see Fig ure 2 11 if the Von Latch function is ...

Страница 25: ...he current rise rate is 0 1 A μs and the current setpoint is 20 A then the current rise rate is shown as below when the input is turned on see Figure 2 14 Figure 2 14 Current Rise Rate Note The Current Rise Rate can be effective only in CCH and CCL and the actual rise rate is one tenth of the setpoint in CCL 2 9 5 Current Fall Rate The Current Fall Rate is used to set the current fall rate in CC m...

Страница 26: ...ote control Function Effect Default using the example of SPL 400 40 Input Input status Off Mode Operation mode CCH Current level Immediate current level 0 A Current rise rate Current rise rate 4 A μs Current fall rate Current fall rate 4 A μs Current Hlevel Transient current high level 0 A Current Llevel Transient current low level 0 A Current protection level Current limit 40 A Current protection...

Страница 27: ...oltage protection will be enabled and the input is turned off with OV displayed mean while the OV and VF status register bits are set and will remain set until they are reset and the overvoltage condition is removed 2 14 3 Overcurrent The electronic load allows the user to define a current protection limit When the defined current limit is exceeded the overcurrent timer starts timing and the displ...

Страница 28: ...our load must be installed in a location that allows sufficient space at the sides and rear of the load for adequate air circulation The fans cool the load by drawing in air through the sides and exhausting it out from the back The rubber bumpers must be removed for rack mounting 3 3 Power On Self Test A power on self test can inspect the basic operations of the load to assure you that the load is...

Страница 29: ...r programming to realize the communication with the load GPIB Interface The load provides a GPIB interface and you can set its address to any value between 0 and 30 in MENU When multiple GPIB devices are connected each device on the GPIB interface must have a unique address that is not be used by the devices on other interfaces The address is set to 05 when the load is shipped from the factory USB...

Страница 30: ...ically so there is no need to modify the parameter settings or change the hardware wiring when using remote sensing External Trigger Input Terminal The external trigger input terminal on the front panel is a BNC connector in which the middle part is the input and the outer casing is the input It receives 5 V TTL compatible falling edge trigger signals 3 6 Wiring Sense Connections As the influence ...

Страница 31: ...ient operation Pulsed transient operation Toggled transient operation List operation Battery discharge operation Saving and recalling parameters Clear protection settings Error messages Triggered operation Main menu 4 3 Connecting to the Power Supply Connect the positive pole of the power supply to the INPUT terminal and connect the negative pole of the power supply to the INPUT terminal If the in...

Страница 32: ...6 Use the and key to check the power value MODE CCH Sets the mode CURR 5 12 Sets the current value INPUT ON Turns on the load Procedure Operation Description Display 1 Press the key to enter into the mode selection and parameter setting menu MODE CCH CURR 5 120A 2 Use Entry keys or use the knob together with the keys to input the current value to 5 8 MODE CCH CURR 5 800A 3 Press the Enter key to c...

Страница 33: ...d parameter setting menu 0 000V 0 000A 50 000V CV OFF 5 Press the key to turn on the load 0 000V 0 000A 50 000V CV ON 6 Check the present power value with the and keys 0 000V 0 000A 50 000V 0 000W MODE CV Sets the mode VOLT 50 Sets the voltage value INPUT ON Turns on the load Procedure Operation Description Display 1 Press the key to enter into the mode selection and parameter setting menu MODE CV...

Страница 34: ...ES 1 5000Ω 4 Press the Enter key to confirm and exit the mode selection and parameter setting menu 0 000V 0 000A 1 5000Ω CRL OFF 5 Press the key to turn on the load 0 000V 0 000A 1 5000Ω CRL ON 6 Check the present power value with and 0 000V 0 000A 1 5000Ω 0 000W MODE CRL Sets the mode RES 1 5 Sets the resistance value INPUT ON Turns on the load Procedure Operation Description Display 1 Press the ...

Страница 35: ... key to confirm and exit the mode selection and parameter setting menu 0 000V 0 000A 100 00W CPV OFF 5 Press the key to turn on the load 0 000V 0 000A 100 00W CPV ON 6 Check the present power value with and 0 000V 0 000A 100 00W 0 000W MODE CPV Sets the mode POW 100 Sets the power value INPUT ON Turns on the load Procedure Operation Description Display 1 Press key to enter into the mode selection ...

Страница 36: ...r into main menu and select Short short circuit item with the key Short On Off 2 Use the key or knob to set On and press the Enter key to confirm Short On Off 3 Press the key to exit the main menu The display shows s to indicate in the basic test mode 0 000V 0 000A 0 000V sCV OFF 4 Press the key to enter into the mode selection and parameter setting menu use and keys to select one basic operating ...

Страница 37: ...el time TimeL to 400 ms and the load is in continuous transient operation The operating procedures are shown as below Procedure Description Display 1 Press the key to enter into the mode selection and parameter setting menu use keys to select CV mode press the Enter key to confirm and exit the mode selection and parameter setting menu 0 000V 0 000A 0 000V CV OFF 2 Press the Tran key to enter into ...

Страница 38: ...0 000V 0 000A 0 000A CCH OFF 2 Press the Tran key to enter into transient operation The display shows t to indicate in CCH status 0 000V 0 000A 0 500A tCCH 3 Press the key to enter into the transient operation menu LevelL 0 500A LevelH 1 000A 4 Use Entry keys or use the knob together with keys to set LevelL to 1 and press the Enter key to confirm LevelL 1 000A LevelH 1 000A 5 Use Entry keys or use...

Страница 39: ...d Trig One trigger occurs Procedure Description Display 1 Press the key to enter into the mode selection and parameter setting menu use the keys to select CRH mode press the Enter key to confirm and exit the mode selection and parameter setting menu 0 000V 0 000A 20 000Ω CRH OFF 2 Press the Tran key to enter into transient operation The display shows t to indicate in CRH status 0 000V 0 000A 2000 ...

Страница 40: ... it is needed to modify one step use and keys to select this step The setting operations for this step are the same as decribed under item 8 10 If it is needed to add one step to the last step use the key to select the new step The setting operations for this new step are the same as decribed under item 9 11 If it is needed to insert one step above an edited step use and keys to select this edited...

Страница 41: ...o confirm Clear Data Yes No 10 Use the key or knob to select Yes and press the Enter key to confirm The data is cleared and step edit screen appears 01 0 00000s CC 0 000A 11 Edit the step 1 CCL 1 A 1 S The time set value in the upper right corner of the display flashes Use the Entry keys or the knob together with keys to input time to 1 s and press the Enter key to confirm 01 1 00000s CCH 0 000A 1...

Страница 42: ...The basic mode showed in lower left corner of the display flashes Use the knob or the key to select operating mode to CCH and press the Enter key to confirm 06 1 00000s CCH 0 000A Step 9 The set value in the lower right corner of the display flashes Use Entry keys or the knob together with the keys to input the current value to 5 A Press the Enter key to confirm and enter into the next operation 0...

Страница 43: ...rmination voltage value and discharge current value Press the Ente key to confirm 4 Press the key to exit the battery discharge parameters edit screen 5 Press the key to turn on the load and start battery discharge operation 6 Press the key to turn off the load and stop battery discharge operation 7 Press the key to clear the discharge time and discharge capacity of the battery 8 Press the key key...

Страница 44: ...ngs will become the power on settings For the above operating procedures the corresponding SCPI commands should be MODE CCH Sets the load to CCH status CURR 2 Sets the current value to 2A SAV 0 Saves the present settings in Location 0 in EEPROM Steps Description Display Step 1 Press the key to turn off the load and connect the tested battery correctly 20 000V 0 000A 0 000A CCH OFF Step 2 Press key...

Страница 45: ...error message The detailed operations are shown below For the above operating procedures the corresponding SCPI commands should be SYST ERR Queries the error code and error messages Note An overview of the individual error messages and the associated explanations are provided in the SPL SCPI Programming Guide in Chapter 3 Procedure Description Display 1 Set the mode to CV set the voltage value to ...

Страница 46: ... menu item 3 Use the knob or keys to select the parameter or use Entry keys or the knob together with keys to input set value Press key to exit the parameter modification or exit the main menu 4 Press the Enter key to confirm 5 Press the key to exit the main menu 4 14 1 Loading Default Values Example Load the default values The detailed operations are shown below Steps Description Step 1 Select Li...

Страница 47: ...ter into the main menu Load Default Yes No 2 Use the key to select the menu item Short use the knob or key to select the parameter On Press the Enter key to confirm Short On Off 3 Press the key to exit the main menu 4 Press the key to enter into the mode selection and parameter setting menu use keys to select CV mode Press the Enter key to confirm and exit the mode selection and parameter setting ...

Страница 48: ...tion Display 1 Set the load to CV mode and set the voltage value to 2 V see section 4 5 for details 0 000V 0 000A 2 000V CV OFF Step2 Press the key to enter into the main menu Load Default Yes No Step3 Use the key to select the menu item CV Curr Limit use Entry keys or the knob together with keys to input the current limit value to 20 A Press the Enter key to confirm CV Curr Limit 20 000A Step4 Pr...

Страница 49: ...ep 1 Press the key to enter into the main menu Load Default Yes No Step 2 Use the key to select the menu item Interface use the knob or the key to select the parameter RS232 Press the Enter key to confirm Interface RS232 USB GPIB Step 3 Use the key to select the menu item Baud Rate use the knob or the key to select the parameter 9600 press the Enter key to confirm Baud Rate 9600 19200 Step 4 Use t...

Страница 50: ...nsure normal communication 5 3 Remote Control Indicator There is a REM indicator on the front panel of the load When the load receives the remote command SYSTem REMote via RS232 or GPIB interface the REM annunnciator turns on And the load enters remote control status In this status all operations on the load are controlled by the remote controller the front panel keypad and knob has no effect exce...

Страница 51: ...mit to 3 A sets the time delay to 10 s programs the resistance level to 10 Ω and reads back the computed power 1 INPUT OFF Turns off the load s input 2 MODE CRM Selects the CRM mode 3 CURR PROT LEV 3 DEL 10 Sets the current protection limit to 3 A and current protection delay time to 10 s 4 CURR PROT STAT ON Activates the current protection 5 RES 10 Sets resistance level to 10 Ω 6 INPUT ON Turns o...

Страница 52: ...rce 4 VOLT LLEV 0 5 Sets the transient low level to 0 5 V 5 VOLT HIGH 1 Sets the transient high level to 1 V 6 TRAN HTIM 1ms Sets transient high level time to 1 ms 7 TRAN RTIM 10us Sets the time for transient rising edge to 10 μs 8 TRAN FTIM 10us Sets the time for transient falling edge to 10 μs 9 TRAN MODE PULSE Selects the pulsed transient operation 10 TRAN ON Activates the transient operation 1...

Страница 53: ...A 0 5 40 mΩ I 3 A 0 5 40 mΩ I 3 A Middle Range CRM 2 200 Ω 2 200 Ω 6 66 666 Ω 6 6 666 Ω Resolution 8 6 μS 2 8 6 μs 2 6 μS 2 2 6 μS Accuracy 0 3 1 25 mS U 8 V 0 3 1 25 mS U 8 V 0 3 375 mS U 20 V 0 3 375 mS U 20 V High Range CRH 20 2000 Ω 20 2000 Ω 66 6 6660 Ω 66 6 6660 Ω Resolution 0 96 μs 0 96 μs 0 29 μS 0 29 μS Accuracy 0 3 0 625 mS U 8 V 0 3 0 625 mS U 8 V 0 3 188 μS U 20 V 0 3 188 μS U 20 V Con...

Страница 54: ... 10 μs 10 μs 10 μs Accuracy 0 2 10 μs 0 2 10 μs 0 2 10 μs 0 2 10 μs Number of Steps 1 50 1 50 1 50 1 50 Cycle 1 65 535 1 65 535 1 65535 1 65535 Storage Capacity 7 Lists 7 Lists 7 Lists 7 Lists Expanded Functions Chain Chain Chain Chain Battery Discharge Discharge Time 1 s 100 h 1 s 100 h 1 s 100 h 1 s 100 h Resolution 1 s 1 s 1 s 1 s Accuracy 0 2 1 s 0 2 1 s 0 2 1 s 0 2 1 s Battery Capacity 1 mA 3...

Страница 55: ...mA 30 mA 3 mA 30 mA 3 mA 30 mA Voltage rms 5 mV 5 mV 12 mV 12 mV Environmental Conditions Temperature 0 50 C 0 50 C 0 50 C 0 50 C Relative Humidity 85 85 85 85 Remote Interface 6 RS232 GPIB RS232 GPIB RS232 GPIB RS232 GPIB Programming Language SCPI SCPI SCPI SCPI Mains Input Supply Voltage AC 115 V AC 230 V 10 15 AC 115 V AC 230 V 10 15 AC 115 V AC 230 V 10 15 AC 115 V AC 230 V 10 15 Line Frequenc...

Страница 56: ...2 111 Fax 49 911 8602 777 E Mail info gossenmetrawatt com www gossenmetrawatt com 7 Repair and Replacement Parts Service When you need service please contact GMC I Service GmbH Service Center Beuthener Straße 41 90471 Nürnberg Germany Phone 49 911 817718 0 Fax 49 911 817718 253 E Mail service gossenmetrawatt com www gmci service com 8 Product Support When you need service please contact Gossen Met...

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