Operating Instructions KONSTANTER SPL Series Programmable DC Electronic Load 3-349-702-03 3/10.
Table of Contents Page Table of Contents Safety Instructions ...................................................... 4 4 1 General Introduction ........................................................ 6 1.1 1.2 1.3 1.4 1.5 1.6 1.6.1 1.6.2 1.6.3 1.6.4 1.7 1.8 Function Features ..........................................................................6 Front Panel ...................................................................................7 Rear Panel ...............................................
Safety Instructions ! Attention! These operating instructions include all necessary safety precautions for personal safety, as well as for preventing damage to the power supply and any devices connected to it. The following general safety precautions must always be adhered to during operation, maintenance and repair of the device.
1 General Introduction SPL Series programmable electronic load, a new product generation by GOSSEN METRAWATT, is designed for high performance. It provides you with powerful test functions and user-friendly HMI, RS232, USB, GPIB interfaces to support SCPI and Labview. Electronic loads of the SPL series are widely used in scientific research and production fields such as aerospace, shipbuilding, automotive electronics, solar cell, and fuel cell.
1.2 Front Panel ➁ ➀ ➇ ➈ ➆ 12 11 ➉ ➂ Figure 1.1 1 ➄ ➅➁ ➅ LCD 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 Rear Panel Figure 1.
Liste 1.
1.6 Menus 1.6.1 Main Menu Press key to enter into main menu. Please see the list below for main menu content: List of available functions and parameters: Function/Parameter Description Load Default Yes *No Restore default Yes *No Short On *Off Short circuit mode On *Off Von Latch On *Off Von Latch On *Off Von Point 0.000v Set Von voltage point Von point CV Curr Limit 40.
Function / Parameter Description MODE : CPC POWR : 0.000W Constant power-current source mode Immediate power level 1.6.3 Transient Operation Menu Press key in desired mode to enable its transient operation, and press shown as below: 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.
1.7 Display Messages ➀ CC Mode: The first line shows measured voltage and current levels. The second line shows current setpoint, CC mode (CCH indicates constant current high range; CCL indicates constant current low range) and input status of the load: (ON, OFF). ➁ 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). ➂ CR Mode: The first line shows measured voltage and current levels.
➃ CP Mode: The first line shows measured voltage and current levels. The second line shows power setpoint, CP mode (CPC indicates constant power-current source mode; CPV indicates constant power-voltage source mode), and input status of the load: (ON, OFF). ➄ Transient Operation: The first line 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).
➇ Short Circuit Operation: The first line shows measured voltage and current levels. The second line shows setpoint level in short circuit, short circuit operation mode (“s” indicates short circuit test), and input status of the load (ON, OFF). ➈ Display Momentary Power: Pressing ▲ and ▼ key can switch between the display of load status and momentary power. On the display screen of actual power, the first line shows momentary voltage and current. The second line shows setting value and power level.
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.
2.3.1 Constant Current Mode (CC) Constant current mode has two ranges, the high range (CCH) and the low range (CCL). The high range provides wider test range. The low range provides better resolution at low current settings. In CC mode, the load will sink a constant current in accordance with the programmed value regardless of the change of input voltage key in basic mode to enter into mode selection and parameter setting menu. (see Figure 2.1). Press Choose CCH or CCL mode with ▲ and ▼ keys.
2.3.2 Constant Voltage Mode (CV) In CV mode, the load will attempt to sink enough current to control the source voltage to the programmed constant value regardless of the change of input current. (see Figure 2.2). Press key in basic mode to enter into mode selection and parameter setting menu. Choose CV mode with ▲ and ▼ cursor keys. Input the voltage setpoint value via the Entry keys or the knob with ◄ ► cursor keys. Press Enter for confirmation.
2.3.3 Constant Resistance Mode (CR) Constant resistance mode has three ranges: the low range (CRL), the medium range (CRM), and the high range (CRH). In CR mode, the load is equivalent to a constant resistance and will sink a current linearly proportional to the input voltage in accordance with the key in basic mode to enter into mode selection and parameter setprogrammed resistance to make I=U/R (see Fig.2-3). Press ting menu. Choose CR mode with ▲ and ▼ keys.
2.3.4 Constant Power Mode (CP) There are two sorts of constant power modes, the Constant Power-Voltage Source mode (CPV) and the Constant Power-Current Source mode (CPC). The CPV mode is applied to voltage source test, and the CPC mode is applied to current source test. In CP mode, the load consumes the constant power in accordance with the programmed value regardless of the changes of external current key to enter into mode selection and parameter setting menu.
2.4 Transient Operation When the transient operation is enabled, the load periodically switches between two levels (LevelH and LevelL), which can be applied to test the dynamic characteristics of the power supply. The transient operation can be executed in the CC, CV and CR modes, and has three operating statuses: Continuous, Pulsed, and Toggled. Please make sure the List Operation has been disabled before enabling transient operation.
Or via remote command to set: SCPI Command Description TRAN ON Enables transient operation CURR:LOW 5 Sets transient current low level to 5 A CURR:HIGH 10 Sets transient current high level to 10 A TRAN:LTIM 500 μs Sets transient low level time to 500 μs TRAN:HTIM 500 μs Sets transient high level time to 500 μs TRAN:RTIM 200 μs Sets the time for transient rising edge to 200 μs TRAN:FTIM 200 μs Sets the time for transient falling edge to 200 μs TRAN:MODE CONT Selects continuous operation INP
Set the following parameters in transient operation menu: LevelL 5.000A LevelH 10.000A TimeH 0.50ms TimeR 0.10ms TimeF 0.10ms Mode Puls Then press the key to turn on the input.
2.4.3 Toggled Transient Mode The trigger function is required for toggled transient operation. As long as no trigger occurs, the load remains at transient low level. After a trigger has been received, a toggle operation will be executed, and high transient level will be reached after the duration of rising edge. The load will keep this level until a new trigger is received. Once this happens, the load will return to transient low level after the duration of falling edge.
Figure 2.8 2.5 Toggled Transient Operation List Operation Besides Transient operation, the electronic load provides more flexible list operation, which can make the load operate according to the preset sequence. The list operation allows you to program a series of sequence steps, and the operation mode, the load values, the duration time for each step can be set. The sequence operation can be executed in the CC, CV, and CR modes. The minimum duration for each step is 10us, and the maximum one is 99999.
2.6 Battery Discharge Operation The electronic load adopts constant current discharge to test the battery capacity. The discharge current and cut-off voltage can be selfdefined. When the battery voltage decreases to the cut-off voltage, the battery discharge test will stop automatically. The test procedure is shown in Figure 2.10. The load can real-time display battery voltage, discharge current, discharge time, and discharge capacity during the test.
2.8 Triggered Operation The triggered operation is mainly used to make the load keep synchronized with other test equipments or events. SPL Series electronic load provides various triggering modes, which can be applied to the following occasions: • Triggering a preset level Transfer all pending preset levels to the immediate levels. For the presently active mode, the new level will appear at the input at once if the input is turned on.
2.9 Input Control 2.9.1 Turning On/Off the Load The input can be turned on/off by pressing the key, or via the remote command (INPUT ON/OFF). If the load’s input stays in OFF status, press the key to turn on the input; if the load’s input stays in ON status, press key to turn off the input. Turning the input on/off (zero current) does not affect the programmed settings.
2.9.3 Current Limit in CV Mode The CV Current Limit is used to limit the maximum input current in CV mode. If the voltage is still larger than the setpoint while the current limit has been reached, the load will switch to the CC mode. Please see Figure 2.13. The input will not be turned off in the CV current limit, which is different from the software current limit. The CV Current Limit can be set in main menu, or via the remote command ( INPut:LIMit:CURRent ).
2.10 Measurement Function The electronic load has measurement system with high resolution. The input current level and voltage level can be measured in real time. The input power level and resistance level can be computed with the input voltage level and current level. Each measured value can be checked through LCD display or via remote command (MEASure). 2.
All errors are saved in one error queue. The errors in this error queue are read in the order in which they occurred. At most 20 error messages can be saved in the error queue. If the errors exceed 20, the last error in the error queue will be replaced with -350, “Too many errors”. The load will not save any additional error message, unless you clear or read errors from the queue. Once the error message is read, it will be cleared in the error queue. 2.
2.15 Auxiliary Functions 2.15.1 Trigger Function Selection The Trigger Function in main menu is used to select the trigger object. Selecting “Tran” is used to trigger transient operation, and selecting List is used to trigger sequence (list) operation. 2.15.2 Knob Function The Knob in main menu is used to enable/disable the knob function. Select On to enable the knob function, and select Off to disable. 2.15.3 Key Sound The Key Sound in main menu is used to control the key sound.
3.4 Connections on the Rear Panel The rear panel of the electronic load is shown as Figure 3.1, which mainly includes AC input part and communication interface part. The AC input part includes AC input socket, Fuse holder, and Line voltage switch; the interface part includes RS-232 interface and the interface for optional GPIB or USB. GPIB or USB interface AC input socket Line voltage selector switch 115 V / 230 V Fuse holder RS232 interface Figure 3.
3.5 Connections on the Front Panel The terminals of the electronic load on the front panel include input terminals (INPUT+, INPUT-), remote sense terminals (SENSE +, SENSE -), and an external trigger input terminal. See Figure 3.2. Figure 3.2 Connections on the Front Panel Input Connections Input connections are made to two binding posts (INPUT+, INPUT-) on the front panel. The maximum wire diameter is 6mm.
4 Local Operation The local operation of the load has been briefly introduced in Chapter 2 „Functions and Features“. In this chapter, it will be explained in details with examples. 4.1 Local Control If it is needed to control the load from the front panel, the load must stay in the local control status. The load enters into local control status once it is powered on, and preset parameters saved in EEPROM location 0 will be recalled automatically.
4.5.1 CC Mode Constant current mode has two ranges, the high range (CCH) and the low range (CCL). Example 1: In CV mode, set the load to CCH, the current to 5.12 A and turn on the load. The operating procedures are shown below: Procedure Operation Description Display 1 Press the MODE : VOLT : CV 80.000V 2 Use ▲ or ▼ key to select CCH mode. MODE : CURR : CCH 0.000A 3 Use Entry keys, or use the knob together with the ◄ ► cursor keys to input the current value to 5.12. MODE : CURR : CCH 5.
4.5.2 CV Mode Example 1: Set the load to CV mode and the voltage value to 50 V in CCH. Then turn on the load, and check the present power value. The operating procedures are shown below: Procedure Operation Description Display 1 Press the MODE : CURR : CCH 3.800A 2 Use the ▼ key to select CV mode. MODE : VOLT : CV 80.000V 3 Use Entry keys or use the knob together with the ◄ ► cursor keys to input the voltage value to 50. MODE : VOLT : CV 50.
4.5.3 CR Mode CR Mode includes constant resistance low range (CRL), constant resistance medium range (CRM), and constant resistance high range (CRH). Example 1: Set the load to CRL and set the resistance value to 1.5 Ω in CV mode. Turn on the load, and check the present power value. The operating procedures are shown below: Procedure Operation Description Display 1 Press MODE : VOLT : CV 50.000V 2 Use ▼ key to select CRL. MODE : RES : CRL 0.
4.5.4 CP Mode CP Mode includes constant power-current source mode (CPC) and constant power-voltage source mode (CPV). Example 1: Set the load to CPV and set the power value to 100 W. Turn on the load, and check the present power value. The operating procedures are shown below: Procedure Operation Description Display 1 Press the MODE : RES : CRL 1.8000Ω 2 Use the ▼ key to select CPV. MODE : POWR : CPV 0.000W 3 Use Entry keys or the knob together with ◄ ► keys to input the power value to 100.
4.6 Short Circuit Operation The operating procedures for short circuit operation are shown below: Example 1: The load was in CV mode previously and it is turned off. Set the load to short circuit in CCH status. Turn on the load to execute short circuit operation. Procedure Description Display 1 Press the 2 Use the ◄ key or knob to set On, and press the Enter key to confirm. Short : On *Off 3 Press the 0.000V 0.000V 0.
4.7 Transient Operation The operating procedures for transient operation are shown below: 1 Press the key to enter into the mode selection and parameter setting menu; use ▲ and ▼ keys to select one basic operating mode; press the Enter key to confirm and exit the mode selection and parameter setting menu. 2 Press the key to enter into transient operation. The display shows “t” to indicate in the basic test mode. 3 Press the key to enter into the transient operation menu.
For the above operating procedures, the corresponding SCPI commands should be: MODE CV Sets the mode TRAN ON Enables the transient operation VOLT:LOW 1 Sets a value to low level VOLT:HIGH 5 Sets a value to high level TRAN:LTIME 400 ms Sets a value to low level time TRAN:HTIME 200 ms Sets a value to high level time TRAN:RTIME 10 ms Sets a value to time for rising edge TRAN:FTIMR 20 ms Sets a value to time for falling edge TRAN:MODE CONT Selects continuous transient operation INPUT ON Turns on the load 4.7.
For the above operating procedures, the corresponding SCPI commands should be: MODE TRAN CURR:LOW CURR:HIGH TRAN:HTIME TRAN:RTIME TRAN:FTIME TRAN:MODE INPUT . . Trig CCH ON 1 5 200ms 10us 10us PULS ON Sets the mode Enables the transient operation Sets a value to low level Sets a value to high level Sets a value to high level time Sets a value to time for rising edge Sets a value to time for falling edge Selects pulsed transient operation Turns on the load One trigger occurs 4.7.
4.8 Sequence Operation (List) The operating procedures for enabling/disabling sequence (list) operation are shown below: key + the key to enter into sequence (list) operation menu. 1 Press the 2 Use Entry keys or the knob to select list number (No.), and press the Enter key to confirm. 3 Use the 4 Use the and keys to activate the sequence (list) operation. 5 Use the and keys to stop the sequence (list) operation. key to quit the sequence operation menu.
4.8.1 Sequence (List) editing Example 1: Edit a new sequence. The sequence number is 0; the sequence Memo is Test Power; the sequence steps: step 1: CCL, 1 A, 1 S; step 2: CCH, 2 A, 1S; step 3: CV, 1 V, 1 S; step 4: CRL, 1 Ω,1 S; step 5: CRH, 200 Ω,1 S. The cycle times (Count) for sequence operation is 5; disabling the sequence chain; starting sequence operation; stopping sequence operation. Procedure Description Display 1 Press the 2 Use Entry keys or the knob to set the sequence number (No.
4.8.2 Modifying, Adding, Inserting, Deleting Sequences Exampel 1: Based on the example 1 in section 4.8.1, step 1 modifies the time to 2 s. Add “CCH, 5 A, 1S” to the last step. Insert “CRL , 1 Ω,10 S” at step 3. Delete step 2. The sequence is chained to itself to realize the continuous execution. Steps Description Display 0 Memo: Test Power Step 1 Press the Step 2 Use the ▼ key to select Data:.
4.8.3 Starting/Stopping the List Example 1: Start the No.0 sequence, and stop the active sequence operation. Steps Description Display and key to enter into sequence operation menu. ►No.: 1 Step 1 Press Step 2 0 Use Entry keys or knob to set the sequence number (No.) to 0, and press the Enter key to confirm (recall the sequence in EEPROM ►No.: Memo: Test Power assigned by the sequence number). Step 3 Press the Step 4 Press the key + Step 5 Press the key + Memo: 0.000V 0.000A 0.
Example 1: Enter into the battery discharge operation; set the termination voltage to 15 V, and the discharge current to 3 A; turn on the load, and start the battery discharge operation; turn off the load and stop the battery discharge operation; clear the discharged time and discharged capacity of the battery; exit the battery discharge operation. Steps Description Step 1 Press the Step 2 Press Display key to turn off the load, and connect the tested battery correctly.
Example 2: Based on the above example, set the mode to CV; set the voltage value to 40 V; turn off the load; recall the values saved in Location 0 in EEPROM. The detailed operations are shown below: Procedure Description Display 1 Set the mode to CV; set the voltage value to 40 V; turn off the load(please refer to section 4.4 for detailed operations). 0.000V 40.000V 2 Press the Recall File: No. 0 3 Press the Entry keys or the knob to select the recalled Location 0. Recall File: No.
4.13 Triggered Operation When the triggering mode is EXTernal, the triggered operations are shown below: 1 Set pending trigger function (see section 2.8). 2 Press the key + key or trigger terminal (TRIG IN) to receive TTL falling edge, and a trigger occurs. Example 1: Select “List” for the trigger function to trigger a sequence operation. The sequence is the one mentioned in Example 1 in section 4.8.1.
4.14.2 Short Circuit Operation Example: Short circuit operation in CV mode. The detailed operations are shown below: The detailed operations are shown below: Procedure Description 1 Press the 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. 3 Press the Display key to enter into the main menu. Load Default : Yes *No Short On *Off key to exit the main menu.
4.14.4 Current Limit in CV Mode Example: Set the load to CV mode; set the voltage value to 2 V; set the current limit value in CV mode (CV Curr Limit) to 20 A; turn on the load. The detailed operations are shown below: Procedure Description Display 1 Set the load to CV mode, and set the voltage value to 2 V (see section 4.5 for details). 0.000V 2.
4.14.6 Trigger Function Selection Example: Select „Tran“ in trigger function selection (Trig Function). Procedure Description Display 1 Press the 2 Use the ▼ key to select the menu item “Trig Function”; use the knob or the ◄ key to select the parameter “Tran”. Press the Enter key to confirm. Trig Function : *Tran List 3 Press the 0.000V 0.000A key to enter into the main menu. key to exit the main menu. Load Default : Yes *No 0.
5 Remote Programming Operation SPL Series Electronic Load supports both local operation and remote control. The previous chapter has introduced how to use the front panel keys and knobs to operate on the load. This chapter will introduce you to how to program the load from the remote controller. The similarities between local and remote programming will become apparent as you read this chapter. The intent of this chapter is to help users quickly become familiar with remote programming operations.
5.6.3 Programmable Current Protection When programmable current protection is enabled, and the programmed current limit and time delay are exceeded, the load‘s input will be turned off. 5.7 CC Mode Examples This example sets the current level to 0.5 A, and then reads back the actual current value. 1 "INPUT OFF" 2 "MODE CCL" 3 "CURR 0.5" 4 "INPUT ON" 5 "MEAS:CURR?" 5.8 Turns off the load` s input Selects the CCL mode Sets current level to 0.
5.11 Pulsed Transient Operation Example This example selects CV pulsed transient operation, selects the bus as the trigger source, and programs a pulse width of 1 millisecond. 1 "INPUT OFF" 2 "MODE CV" 3 "TRIG:SOUR BUS" 4 "VOLT: LLEV 0.5" 5 "VOLT:HIGH 1" 6"TRAN:HTIM 1ms" 7 "TRAN:RTIM 10us" 8 "TRAN:FTIM 10us" 9 "TRAN:MODE PULSE " 10 "TRAN ON" 11 "INPUT ON" 12 "*TRG" 52 Turns off the load‘s input Selects the CV mode Selects the bus as the trigger source Sets the transient low level to 0.
6 Specifications Type SPL 250-30 SPL 400-40 SPL 200-20 SPL 350-30 Article number K852A K853A K854A K855A Front Load Input 1 1 1 1 Current 0 ... 30 A 0 ... 40 A 0 ... 20 A 0 ... 30 A Input Ratings Voltage 0 ... 80 V 0 ... 80 V 0 ... 200 V 0 ... 200 V Power 1 250 W at 40 °C 400 W at 40 °C 200 W at 40 °C 350 W at 40 °C Input Characteristics V 80 V 8.3 V 0.6 V Minimum Operating Voltage @ Full Scale Current Max. Power Contour 3.1 A 30 A I 0.6 V V 80 V 10 V 0.6 V Max.
Type SPL 250-30 SPL 400-40 SPL 200-20 SPL 350-30 Article number K852A K853A K854A K855A Power Measurement Range 0 ... 250 W 0 ... 400 W 0 ... 200 W 0 ... 350 W Resolution @ P < 100 W 1 mW 1 mW 1 mW 1 mW Resolution @ P ≥ 100 W 10 mW 10 mW 10 mW 10 mW Accuracy 0.1% + 600 mW 0.1% + 600 mW 0.1 % + 600 mW 0.1 % + 600 mW Range CCH 1 mA/μs ... 3 A/μs 1 mA/μs ... 4 A/μs 1 mA/μs ... 2 A/μs 1 mA/μs ... 3 A/μs Range CCL 3 100 μA/μs ... 300 mA/μs 100 μA/μs ... 400 mA/μs 100 μA/μs .
Type SPL 250-30 SPL 400-40 SPL 200-20 SPL 350-30 Article number K852A K853A K854A K855A Input OFF 25 A 30 A 25 A 25 A Input ON 40 A 50 A 35 A 40 A Current (rms/p-p) 3 mA / 30 mA 3 mA / 30 mA 3 mA / 30 mA 3 mA / 30 mA Voltage (rms) 5 mV 5 mV 12 mV 12 mV Reverse Current Capacity Ripple and Noise Environmental Conditions Temperature 0 ... 50 °C 0 ... 50 °C 0 ... 50 °C 0 ...
7 Repair and Replacement Parts Service When you need service, please contact: GMC-I Service GmbH Service-Center Thomas-Mann-Straße 16 - 20 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: GMC-I Messtechnik GmbH Hotline Produktsupport Phone +49 911 8602-0 Fax +49 911 8602-709 E-Mail support@gossenmetrawatt.
