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Hopetech Electronics Technology HP8000 Series User Manual

Programmable dc electronic load
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User's Manual
HP8000 series
PROGRAMMABLE DC ELECTRONIC LOAD
Hopetech Electronics Technology
2020-11-10
Manual Edition V.2.2
1

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Summary of Contents for Hopetech Electronics Technology HP8000 Series

  • Page 1 User’s Manual HP8000 series PROGRAMMABLE DC ELECTRONIC LOAD Hopetech Electronics Technology 2020-11-10 Manual Edition V.2.2...

  • Page 2: Table Of Contents

    Hopetech Electronics Technology Content Contents Introduction ............................4 Chapter 1 Size and Installation ........................... 8 1 .1 Dimension .............................. 8 1.2 Angle adjustable ............................8 1.3 Installation ............................... 9 1.4 Plug in Power Cord ..........................9 Chapter 2 Quick Start ............................11 2.1 Product Introduction ..........................
  • Page 3 Hopetech Electronics Technology 8.1 Communication module ........................73 8.2 DB9 ............................... 73 8.3 Protocol ..............................74 8.4 SCPI Communication Instruction ......................75...

  • Page 4: Contents Introduction

    Hopetech Electronics Technology Contents Introduction Thank you for purchasing Hopetech 8000 series DC Electronic Load. To obtain maximum performance from the product, please read this manual first, and keep it handy for future reference. We will use the alias E-load of DC Electronic Load in the following.
  • Page 5 Hopetech Electronics Technology Indicates very important message in this manual. When the symbol is printed on the instrument, refer to a corresponding topic in the Instruction Manual. Indicates DC (direct current) Indicates a fuse Indicates earth terminal In this manual, the risk seriousness and the hazard levels are classified as follows.
  • Page 6 Hopetech Electronics Technology  Near induction heating systems (such as high-frequency induction heating systems and IH cooking equipment)  Susceptible to vibration Checking before use Before using the instrument at the first time, verify that it operates normally to ensure that no damage occurred during storage or shipping.
  • Page 7 Hopetech Electronics Technology Be sure to connect the test lead correctly. Wear gloves of rubber or similar materials during measurement. For achieving the measurement accuracy, it is recommended that the equipment should be operated half an hour after power-on.

  • Page 8: Chapter 1 Size And Installation

    Hopetech Electronics Technology Chapter 1 Size and Installation 1 .1 Dimension 8000 series electronic load dimension Figure 1.1 Instrument dimension Figure 1.2 Instrument dimension 1 Figure 1.3 Instrument dimension 2 1.2 Angle adjustable The 8000 series electronic load bracket is adjustable in angle and convenient for users to place.

  • Page 9: Installation

    Hopetech Electronics Technology Figure 1.4 E-Load bracket open Figure 1.5 E-Load bracket close 1.3 Installation This instrument is intended for indoor use in a pollution degree 2 environment. Please refer to the specifications table for the allowable environment operating limits.
  • Page 10 Hopetech Electronics Technology Figure 1.7 4 types of power cord for different countries and area...

  • Page 11: Chapter 2 Quick Start

    Hopetech Electronics Technology Chapter 2 Quick Start This chapter describes the power-on check procedure for the 8000 Series load to ensure that the E-load is properly started and used during initialization. It also introduces the E-load front panel, rear panel, keyboard button functions and LCD display function to ensure that you can quickly understand the appearance, structure and button usage of the E-load before operating the E-load.
  • Page 12 Hopetech Electronics Technology  CV constant voltage mode  CC constant current mode  CW constant power mode  CR constant resistance mode 4) Multiple extended function modes: LIST mode simulate a variety states of load change. OCP mode Over current protection point test mode.

  • Page 13: Front Panel

    Hopetech Electronics Technology 15) Memory capacity up to 200*8 groups; 16) Intelligent fan system fan automatically initiated activate according based on changing to the ambient temperatures 17) Built-in Buzzer as an early warning reminder; 18) Power-off to maintain memory function;...
  • Page 14 Hopetech Electronics Technology Operating keys Digital keys Operating keys LCD display panel Front panel key description When in the standby state, the panel POWER button light is red, press the POWER button for 3s, the power is turned on, the screen is lit, and the panel button light turns green.

  • Page 15: Lcd Status Bar Function

    Hopetech Electronics Technology 2.4 LCD Status Bar Function The following screen is 8000 series E-oad LCD display interface.The status bar is the top line icons. There are several icons on the status bar in the top line. Figure 2.2 LCD interface...

  • Page 16: Rear Panel

    Hopetech Electronics Technology Keyboard lock. Icon is , keyboard locks, long press to unlock. means E-load connecting to the PC, it is allowed to Send commands on the PC to perform related operations on the E-load. 2.5 Rear Panel The following picture is the rear panel for the 8000 E-load.

  • Page 17: First Turn-On Checkout

    Hopetech Electronics Technology 2.6 First turn-on checkout The successful self-test process indicates that the E-load meets the factory standards and can be used by the user normally. Before operating the E-load, make sure you understand the safety instructions. Ensure that the line voltage selector switch on the back panel is set to match your line voltage.

  • Page 18: In The Event Of A Problem

    Hopetech Electronics Technology 2.6.2 In the Event of a Problem If the E-load fails to power up, the following troubleshooting steps will help you to solve the problem. 1. Make sure the power cord is connected properly and the power switch has been pushed in to ON.

  • Page 19: Chapter 3 Functions And Features

    Hopetech Electronics Technology Chapter 3 Functions and Features This chapter will introduce functions and features of 8000 E-load in the following sections:  Basic operation modes  LIST function  OCP over current test function  EFFT load effect test function ...

  • Page 20: Constant Voltage Mode (Cv)

    Hopetech Electronics Technology Figure 3.1 CC mode In CC mode, the E-load provides two methods to set the constant current value. 1) In CC mode, use the numeric keys to input the current value, press the key confirm the setup constant current value, and press the key to load or unload the source.

  • Page 21: Constant Resistance Mode (Cr)

    Hopetech Electronics Technology Figure 3.2 CV mode In CV mode, the E- load provides two methods to modify the constant voltage value. 1) In CV mode, use the numeric keys to input the voltage value, press the key confirm the setup constant voltage value; press the button to ON/OFF the loading test.

  • Page 22: Constant Power Mode (Cw)

    Hopetech Electronics Technology Figure 3.3 CR mode In CR mode, the E-load provides two methods to set the constant resistance value. 1) In CR mode, use the numeric keys to input the resistance value, press the key to confirm the setup constant resistance value, and press the key to on/off the loading test.

  • Page 23: List Operation

    Hopetech Electronics Technology Figure 3.4 CW mode In CW mode, the E-load provides two methods to set the constant power value. 1) In CW mode, use the numeric keys to input the power value, press the key confirm the setup constant power value, and press the key to on/off the loading test.
  • Page 24 Hopetech Electronics Technology Figure 3.5 LIST mode test interface Edit the LIST file and trigger to operate this file. Operation steps: When different trigger sources are selected, the LIST function will form a variety of complex sequences by editing step value, time and slope of each step to meet complicated test requirements.
  • Page 25 Hopetech Electronics Technology LIST parameter setting Parameter Description Curr Loading current Time Duration, setting range 10uS ~ 50S Rate Current slew rate 0.001-3A/uS List mode setting: List test interface→SET CONT Continuous mode--sequential loading mode Counting mode-- when it receives a trigger signal, the load will start List operation for CNT cycles till completion.
  • Page 26 Hopetech Electronics Technology Figure 3.7 LIST loading For example: Source under test: constant voltage source 24V, maximum output current 5A Purposes: to test current output and voltage fluctuation at 5 voltage points of 1A, 2A, 3A, 4A, and 5A. Operation steps: 1.

  • Page 27: Ocp Test Function

    Hopetech Electronics Technology 3.3 OCP Test Function The 8000 series E-load is provided with over-current protection test function (OCP). Under OCP test mode, when the voltage of source under test reached Von value, delay for a while for the E-load to latch. Ascend value by step value at regular interval. At the same time, check the E-load input voltage and judge whether it is higher than standard voltage value.
  • Page 28 Hopetech Electronics Technology Figure 3.10 OCP parameter setting interface OCP parameter OCP parameter: Istart Start Current Iend End Current Step Steps（1~1000） Dwell Step duration（0.01~999.99） V trig Trigger voltage level Ocp Lo Lower limit of over-current Ocp Hi Upper limit of over-current...

  • Page 29: Efft Function

    Hopetech Electronics Technology 3. The E-load starts loading from 3A and stops at 6A in 100 steps with a step value 0.03A. The delay of each step is 0.01S. When the power supply voltage is less than the 1V trigger voltage, the corresponding current value is the OCP current value, and it is judged whether the OCP current value is within the upper and lower limits of the current.

  • Page 30: Auto Test Function

    Hopetech Electronics Technology EFFT setting parameter Parameter Description Imin Draw minimum working current Imax Draw maximum working current Inor Draw normal working current Delay Current duration per step For example: Source under test: constant voltage source 24V, output current 0-5A, normal working current 3A.
  • Page 31 Hopetech Electronics Technology (Mode), and the detection types (SPEC) supported by different working modes are also different. See the following table for details. The load parameters in each mode are also different. See the corresponding chapters of each mode. Introduction.
  • Page 32 Hopetech Electronics Technology Choose the appropriate current range according to the real test I-range condition Step No. Select the specified step for parameter setting Mode Description Empty CC mode CV mode CW mode CR mode SHORT Short EFFT EFFECT LED driver source test mode Comparison type setting: AUTO parameter editing interface →...
  • Page 33 Hopetech Electronics Technology Test delay Time from start loading to read the test value Unloading wait time for completing a single step test (Figure 3.14) time Trigger output and test process setting: test page → press MENU → system setting → press Enter → press the up and down keys to select the output item...
  • Page 34 Hopetech Electronics Technology current 3A. Purposes: to test comprehensive performance of power supply 1. Load capacity test: 3A normal current, to compare voltage within range of 23.5~24.5V. 2. Over-current protection test: use OCP mode to test if the power supply over-current point within the range of 4.8~5.2A.

  • Page 35: Dynamic Function

    Hopetech Electronics Technology Stop testing the next steps when one step fails. 17. After the above settings are completed, press return test interface. Press start the test. Because start voltage is set to 5V, in the future, when the E-load detects an input voltage greater than 5V, the E-load will automatically start to test.( If start voltage set...
  • Page 36 Hopetech Electronics Technology Figure 3.16 DYNA testing page Figure 3.17 DYNA Setting Page DYNA mode setting In continuous mode, the E-load can load between high and Conti low current in different rise rates and duration.
  • Page 37 Hopetech Electronics Technology In pulse-mode, with dynamic test operation enabled, the load will switch to Ib every time after receipt of a trigger Pulse signal and switch back to Ia value after maintaining Tb for pulse width time. In toggle mode, the load current will drop to Ia according to...
  • Page 38 Hopetech Electronics Technology every time after receipt of a trigger signal and switch back to Ta value after maintaining Tb for pulse width time. Figure 3.19 DYNA- pulse mode TRIGGER mode In toggle mode, after enabling dynamic test operation, the load will be switched continuously between Ia value and Ib value after receipt of every trigger signal.

  • Page 39: Battery Test Function

    Hopetech Electronics Technology Object under test: constant voltage source 24V, output current 0-5A, normal working current 3A. Purposes: to test power supply dynamics characteristic, Vp+, Vp- Operation steps: Press the key to enter the mode selection page, press the up and down keys to...
  • Page 40 Hopetech Electronics Technology Figure 3.22 Battery mode setting page BATT Setting parameters Parameters Description Mode Discharge mode CC/CW/CR Value Load value in different discharge modes Stop Time Discharge stop time (termination conditions) Unit AH/WH Stop Volt Discharge stop voltage (termination conditions)

  • Page 41: Short-Circuit Simulation Function

    Hopetech Electronics Technology Operation steps: 1. Press the key to enter the mode selection page, press the up and down keys to select BATT, and press the key to enter the BATT test interface, as shown in Figure 3.21. 2. In Figure 3.21, press the key to enter the setting interface, as shown in Figure 3.22.

  • Page 42: Led Simulation Function

    Hopetech Electronics Technology Figure 3.23 Short-circuit mode test Page 3.9 LED Simulation Function The E-load can simulate the LED at the input, press the key on the E-load front panel to select the LED function to switch the LED working state. The LED equivalent circuit is as follows: Figure 3.24 LED I-V curve...
  • Page 43 Hopetech Electronics Technology measured LED driver Rd --- Resistance of LED driver, can be calculated by V-I curve Rd Coefficient = Rd / (Vo / Io) Vf——LED Positive conduction bias, can be calculated from the Rd, please find the specific example as follows.
  • Page 44 Hopetech Electronics Technology LED setting parameters Parameters Description Led Vo Voltage of operating point Led Io Current of operating point Led Rf Coefficient Coeff Io is given by LED Driver, if there is an error between the actual output and the set value, the corresponding load value Vo will be different.
  • Page 45 Hopetech Electronics Technology range. Regardless of the number of LED in series, the operating point resistance Rd is equal to Coeff (Coeff<1) multiplied by the value of Vo/Io. Therefore, the user can get Io from the rated output current of LED driver and calculate the RdCoeff parameter according to I-V curve on LED specification.

  • Page 46: Sweep Dynamic Frequency Conversion Scanning

    Hopetech Electronics Technology 3.52−3.35 so a single LED Rd = Rd= =1.7 Ω 0.4−0.3 0.35 From formula 3.3, Rf= Rd× =1.7× =0.173 3.44 4. After the setting is completed, press the key to back to the test interface, press the to start testing.
  • Page 47 Hopetech Electronics Technology Figure 3.28 SWEEP function testing page Figure 3.29 SWEEP function setting Page SWEEP setting parameters Parameter Description Low current（Imin） Low level load current High current（Imax） High level load current Starting frequency（Fstart） Initial scan frequency, 0.01Hz~50KHz Cut-off frequency （Fend）...

  • Page 48: Timing Time Measurement

    Hopetech Electronics Technology Rate of decline Current drop rate 0~3 Auto: auto-execute by setting Operating mode（mode） Manual: Press the up and down keys to adjust the frequency, step frequency is Fstep Test case: constant voltage source is 24V, output current is 0-5A, normal working current is 3A.
  • Page 49 Hopetech Electronics Technology Figure 3.30 TIMING mode test Page Figure 3.31 TIMING mode setting interface TIMING function parameter table: TIMING parameter settings Parameter Description CC/CV/CP/CR/OFF available Load mode（Load mode） Set the load value of current, voltage, etc. Load Value（Load Val）...

  • Page 50: Dcr Dc Resistance Measurement Function

    Hopetech Electronics Technology Ending trigger setting（TRIG.END） Trigger signal（Signal） VOLT/CURR/EXT(External trigger) Trigger mode（Edge） rise（RISE）/fall（FALL） When the voltage, current, etc. trigger setting Trigger value（level） value is started, the timing starts. For example: constant voltage source is 24V, output current is 0-5A, normal working current is Test purpose: Power climb time, the time of the power climbing from 2.4V to 21.6V.
  • Page 51 Hopetech Electronics Technology As shown above, connect the battery to be tested, turn on the remote compensation function, and then go to the test page. Set the steps as follows: 1. Press to enter the mode selection page, press up and down key selection DCR, press key to enter the DCR test interface figure 3.32.

  • Page 52: Measurement Item

    Hopetech Electronics Technology Figure 3.33 DCR Mode Setup Interface 3. Set test parameters. DCR Setting Parameters Parameters Note Imin Battery minimum discharge current Imax Maximum discharge current of battery V Io Lower limit for voltage comparison V hi Voltage comparison upper limit...

  • Page 53: Ripple Measurement

    Hopetech Electronics Technology 3.13.2 Ripple measurement The E-load can test voltage ripple (Vpp), current ripple (Ipp) and display in real-time. The measurement method is different from the traditional measurement of oscilloscope with blocking capacitance. The E-load ripple measurement within the measurement bandwidth behave a good flat, so the ripple measurement is more accurate and has extremely high repeatability.

  • Page 54: Chapter 4 System Settings And Save Function

    Hopetech Electronics Technology Chapter 4 System settings and Save function Press key to go to system configuration and save f interface, as shown below: Figure 4.1 MENU Page The system settings is used to set the parameters of the load, such as range, protection, Von, Voff, etc.

  • Page 55: Von/Voff Function

    Hopetech Electronics Technology System Setting（SYSTEM） V-Range low voltage range 0~15.2V HIGH high voltage range 0~152V I-Range low current range 0~3.2A HIGH high current range 0~32A I-Prot Exceed the set value of 0.0002~32A, load protection P-Prot Exceed the set value of 0.001~155W, load protection Set 0V means the function is off.

  • Page 56: Source Type Selection Function

    Hopetech Electronics Technology Figure 4.3 Von、Voff If Von-Delay parameter is set, the E-load will load, when the source voltage reached Von and have delayed for Von-Delay time. 4.1.2 Source Type Selection Function The E-load has the function of automatically detecting the type of source under test. But in some special cases, the source loaded dosen’t meet your expectations.
  • Page 57 Hopetech Electronics Technology Figure 4.4 Configuration Page Configuration setting MEASURE SET Fast Real-time display and loading test Rate Display and loading test after multiple Slow sampling Remote sense function OFF Remote sense Remote sense function ON Key sound function OFF...

  • Page 58: Remote Sense Compensation Mode

    Hopetech Electronics Technology Address Address range from 1~99 ON: One interface and address bit controls multiple E-loads Multi loads communication OFF: Multiple interfaces control multiple E-loads OUTPUT LEVEL- high level as default, low level when there is an output Output Mode PLUSE-high level as default, output 5mS pulse when the test result is qualified;...

  • Page 59: Shortcut Call Mode

    Hopetech Electronics Technology Figure 4.5 Remote Sense Setting Page Remote measurement access, please refer to the figure as below. Wiring Diagram of Remote Sense: Figure 4.6 Remote-Sense wiring Diagram If the remote compensation started, the wiring must be the same as above, otherwise the voltage detection function will be fail.

  • Page 60: Trigger Output Settings

    Hopetech Electronics Technology If the Shortcut Call is enabled, the digital 0~9 keys will change the original function, only the calling function is retained, and the display status bar will display SHORTCUT. When Shortcut Call is turned off, the numeric keys will return to normal.
  • Page 61 Hopetech Electronics Technology Press the key SAVE to save above settings to the file 1 where the cursor is located, and rename it as needed. If you need to call a saved test file, there are two ways: 1. Press the key to go to the setting page and select Save, then select the desired file and press the key Loading to call the stored test mode.

  • Page 62: Chapter 5 Protection Function

    Hopetech Electronics Technology Chapter 5 Protection Function The E-load is provided with following protective functions: 1. overvoltage protection (OVP), 2. over-current protection (OCP), 3. over-power protection (OPP), 4. over-temperature protection (OTP) 5. input v0oltage reverse protection (RV) If any one of the above protections is enabled, the E-load will have corresponding actions.

  • Page 63: Over-Power Protection (Ovp)

    Hopetech Electronics Technology Figure 5.2 OCP Page 5.3 Over-power protection (OVP) The E-load provides over-power protection. When the input power is higher than the setting power (See Chapter 4.1 - System Settings - Power Protection), the E-load will display” OVER POW”, the E-load will be immediately OFF and the buzzer will sound.

  • Page 64: Input Voltage Reverse Protection (Rv)

    Hopetech Electronics Technology automatically be OFF and the buzzer will sound. Press any key to cancel the beeper. Figure 5.4 OTP Page 5.5 Input Voltage Reverse Protection (RV) When the polarity of the input voltage is reversed, the E-load will display” REVERSE”, the E-load will be immediately OFF and the buzzer will sound.

  • Page 65: Chapter 6 I/O Interface

    Hopetech Electronics Technology Chapter 6 I/O Interface The E-load provides I/O interface, which is convenient for the user to connect the external control signal output and other control units to complete the automatic test. 6.1 I/O Interface Figure 6.1:I/O interface...
  • Page 66 Hopetech Electronics Technology 1. The EXV port is an external power supply input port. It can be accessed when the user-specified voltage is required. When the external voltage is not connected, the internal isolation E5V is supplied. 2. GND is the isolated power ground.

  • Page 67: Chapter 7 Specifications

    Hopetech Electronics Technology Chapter 7 Specifications We use FS (full scale) to define measurement tolerances. FS: Maximum display value or measurement range. 7.1 Main Specifications Model HP8151 HP8151A HP8151B HP8201 Input voltage 150V 150V 500V 150V 1.5A Input current Input power...
  • Page 68 Hopetech Electronics Technology Minimum resolution 10us Read-back voltage Range 150V 150V 500V 150V 0.1m 0.1m 0.3m 0.1m Resolution Accuracy ±(0.025%+0.025%FS) Read-back current Range 1.5A 0.02 0.2m 0.02 0.2m 0.01 0.1m 0.02 0.2m Resolution Accuracy ±(0.05%+0.05%FS) Read-back Ripple 150V/30A 500V/15A 150V/30A Range（R/I）...
  • Page 69 Hopetech Electronics Technology Range 0.1Ω~7.5kΩ 0.1Ω~7.5kΩ 0.1Ω~7.5kΩ 0.1Ω~7.5kΩ Resolution 16Bits Accuracy ±0.1% CW mode Range 200W 300W Resolution 16Bits Accuracy ±（0.1%+0.1%FS） mode Bandwidth 100 kHz over Rd coefficient 0.001~1 Dynamic mode 10us~50s Ta＆Tb Minimum resolution 10us Read-back voltage Range 500V...
  • Page 70 Hopetech Electronics Technology Model 8813 Input voltage 0~15V 0~150V Input current 0~12A 0~120A Input power 600W Rated value Mini. operating (0~40℃) 1.4V@120A voltage Min. rise time at 25uS full-scale current Range 0.1~15V 0.1~150V Resolution CV mode 0.1mV Accuracy ± (0.03%+0.02%FS)
  • Page 71 Hopetech Electronics Technology Overvoltage 15.2V 152V protection Over-temperature ≒ 80℃ protection Specification ≒ 12.3/12A ≒ 123/120A Short circuit Input terminal 150KΩ impedance Model 8814 Input voltage 0~15V 0~150V Input current 0~24A 0~240A Input power 1200W Rated value Mini. operating (0~40℃) 1.4V@240A...
  • Page 72 Hopetech Electronics Technology Accuracy ± (0.015%+0.05%FS) Range 0~15V 0~150V Read-back Ripple bandwidth 10Hz~250KHz Accuracy 0.03%+1mV 0.03%+10mV Protection range Overpower 600W protection Overcurrent 24.3A 243A protection Overvoltage 15.2V 152V protection Over-temperature ≒ 80℃ protection Specification ≒ 24.3/24A ≒ 243/240A Short circuit Input terminal 150KΩ...

  • Page 73: Chapter 8 Communication Interfaces

    Hopetech Electronics Technology Chapter 8 Communication Interfaces This chapter mainly introduces the communication mode, method, and protocol of the 8000 series E-load. 8.1 Communication module 8000 series E-load is provided with three communication interfaces to communicate with a computer for selection, including RS232, RS485 and LAN.

  • Page 74: Protocol

    Hopetech Electronics Technology ⑤.GND ⑥.NC ⑦.NC ⑧.485A ⑨.485B 8.3 Protocol The 8000 series of E-loads supports SCPI protocol. Its data frame structure consists of four parts: Set the additional address (to be set only when multi-machine communication is on) i. Press the key on any working interface to enter the parameter setting interface;...

  • Page 75: Scpi Communication Instruction

    Hopetech Electronics Technology Iii. Select the baud rate you want. At present, the E-load only supports 9600, 19200, 38400 and 57600. 8.4 SCPI Communication Instruction *IDN? Meaning: Query version number Return:8151, V1.0 Example: query version number Send: *IDN? Back: 8151,V1.0...
  • Page 76 Hopetech Electronics Technology Meaning: set current rise time Example: set current rise time 3A/uS Send: CURRent: SLEW: RISE 3 Back: no CURRent:SLEW:FALL Meaning: set current fall time Example: set current fall time 3A/uS Send: CURRent: SLEW: RISE 3 Back: no...
  • Page 77 Hopetech Electronics Technology RESistance CR mode DYNamic Dynamic mode LED mode OCP mode LIST LIST mode SHORT SHORT mode SWEEP SWEEP mode TIMing TIMing function AUTO AUTO mode EFFT EFFT mode 14 CURRent Meaning: set the current value in CC mode...
  • Page 78 Hopetech Electronics Technology Send: MEASure: CURRent？ Returns: 00.0000 20 MEASure:POWer? Meaning: read measured power value Example: read measured power value Send: MEASure: POWer？ Returns: 00.000 21 MEASure:RESistance? Meaning: read measured resistance value Example: read measured resistance value Send: MEASure: RESistance? Returns: 00.0000...
  • Page 79 Hopetech Electronics Technology Returns: 00.0000 27 POWer:PROTection? Meaning: read the power protection value Example: read the power protection value Send: POWer:PROTection? Returns: 00.0000 28 DYNamic:HIGH Meaning: set high level loading current in dynamic mode Example: set high level loading current at 3A in dynamic mode...

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