Related Manuals for TDI TDI-Dynaload WCL488 Series
Summary of Contents for TDI TDI-Dynaload WCL488 Series
- Page 1 WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual ® TDI-Dynaload Division Document Number 402828 — Revision B1...
- Page 2 Telephone: (908) 850-5088 Facsimile: (908) 850-0679 Online Availability To find out more about TDI and our products, visit us on the web at: http://www.tdipower.com/ or visit TDI-Dynaload directly at: http://www.tdipower.com/dynaload/. Customer Services For technical assistance regarding our products, contact the following:...
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Page 3: Table Of Contents
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Contents Chapter 1 — Overview ................... 1 Introduction......................1 Modes of Operation ....................2 Constant Current Mode .....................2 Constant Resistance Mode..................3 Constant Voltage Mode .....................3 Constant Power Mode ....................4 Pulse Mode ........................4 Full Scale Range Switching..................4... - Page 4 TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual CS (Current Sample)...................17 REM (Remote or External Programming)............18 SYN (Synchronized Output Signal) ..............18 EN (Remote Enable)...................18 S– and S+ (Voltage Sense) .................18 S– and S+ (Voltage Sense) Wiring Tips ............18 E–...
- Page 5 TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual IEEE Address Setting ..................28 Password Change....................28 SF/SS (Slew Range) ...................28 Number Of Pulses....................28 Terminator (CR/CR-LF) ..................28 LCD Contrast Adjust ..................29 Select Amps/Volt Or Ohms ................29 Check Firmware Revision ..................29 Programmable UV Level ..................29...
- Page 6 TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual WCS UV (Undervoltage Lockout) Switch ..............42 WCS Relay Connector.....................43 WCS Chassis Ground Connection................44 Slave Bit Identifier Switches ...................44 Chapter 3 — IEEE-488 Commands and Programming........ 45 Introduction......................45 IEEE-488 Bus Subsets ..................45 Data Separators....................46...
- Page 7 TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual AV?........................58 AVH Amps/Volt High ..................58 AVL Amps/Volt Low...................59 CI Constant Current ...................59 CON? Condition register..................60 CP Constant Power.....................61 CR? ........................61 CRH Constant Resistance High................61 CRL Constant Resistance Low ................62 CV Constant Voltage..................62...
- Page 8 TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual SDN Shutdown register ..................77 SF Slew Fast .......................78 SR Slew Rate ......................78 SRQ Service Request Register................79 SS Slew Slow ......................80 STA? Status Register..................81 SW Square Wave Pulsing...................82 T1 Pulsing Base Time..................82 T2 Pulsing Peak Time..................83...
- Page 9 TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Appendix H — Specifications by Model............ 119 Figures Figure 1. Constant Current Mode.....................2 Figure 2. Constant Resistance Mode ....................3 Figure 3. Constant Voltage Mode ....................3 Figure 4. Constant Power Mode.......................4 Figure 5.
- Page 10 TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Table B. Equipment Safety Symbols....................7 Table C. Outlet Temperature with 10ºC Inlet...................9 Table D. Outlet Temperature with 20ºC Inlet ................10 Table E. WCL488 AC Input Power Requirements ................14 Table F.
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Page 11: Chapter 1 - Overview
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Chapter 1 — Overview Introduction The WCL488 Water Cooled Electronic Loads are ideal for high current/high power battery, power supply and fuel cell testing. Standard systems from 12kW to 120kW are configured using 12kW standard products in a master/slave configuration. -
Page 12: Modes Of Operation
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Low water flow (3gpm at 10°C / 12kW) Range switching for increased resolution and accuracy WCL488 Dimensions: 19 inches W x 5.22 inches H x 24 inches D WCS Dimensions: 19 inches W x 3.47 inches H x 24 inches D. -
Page 13: Constant Resistance Mode
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Constant Resistance Mode Referring to Figure 2, the Dynaload will sink current linearly proportional to the input voltage. This is set in Amps/Volt, (1/R), or ohms. Slope =... -
Page 14: Constant Power Mode
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Constant Power Mode Referring to Figure 4, the Dynaload will sink the current required at its present input voltage to maintain the desired power level. Constant Pow er Setting... -
Page 15: Wcl488 Front Panel Features And Controls
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual WCL488 Front Panel Features and Controls To better understand the features and controls of the front panel, refer to Figure 5 and Table A. The item numbers in the figure directly correspond to the item numbers in the table. - Page 16 TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Item Number Description Voltmeter/Voltage Full Scale Range Selection* Voltmeter (4 digit) Ammeter/Current Full Scale Range Selection* Ammeter (4 digit. Includes two range indicators. AMPS displays actual current. For K AMPS, multiply the display by 1000 for the actual current.) Wattmeter (4 digit.
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Page 17: Chapter 2 - Installation And Wiring
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Chapter 2 — Installation and Wiring Operator Safety Instructions and Symbols It is very important that these safety instructions and operation instructions are read and understood prior to the installation and use of this electronic load. Failure to follow these basic guidelines could result in serious injury or death. -
Page 18: Cooling Connections And Requirements
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Cooling Connections and Requirements IMPORTANT: Before using this product, you must fully understand the relationship between the water temperature, flow rate, and power dissipation. Failure to meet the cooling requirements could result in an unexpected system shutdown or a catastrophic failure. -
Page 19: Figure 6. Thermal Transfer Characteristics (Rate/Temperature) - Inlet Temperature 10ºc
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual M axim um A llow ed O perating Tem perature 12 kW 10 kW 8 kW 5 kW F low R ate (G allons P er M inu te) — W ater Tem perature 1 0ºC 40 2 82 8-02 -0 1.C D R... -
Page 20: Figure 7. Thermal Transfer Characteristics (Rate/Temperature) - Inlet Temperature 20ºc
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual M axim um A llow ed O perating Tem perature 12 kW 10 kW 8 kW 5 kW F low R ate (G allons P er M inu te) — W ater Tem perature 2 0ºC 40 2 82 8-02 -0 2.C D R... -
Page 21: Special Information For Ethylene Glycol Users
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Special Information for Ethylene Glycol Users The WCL and WCS series of water-cooled electronic loads are designed to operate using water as the cooling fluid. The use of an antifreeze such as ethylene glycol in the coolant water will affect the thermal efficiency of the system. -
Page 22: Wcl488 Typical Rear Panel Connections
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual WCL488 Typical Rear Panel Connections Electrical and plumbing connections are made on the rear panel of the unit. Typical rear panel connections are detailed in Figure 9 (Terminal Block Cover shown installed in Rear View). -
Page 23: Wcl488 Rear Panel Electrical Connections
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual WCL488 Rear Panel Electrical Connections All electrical and electronic connections are made on the unit’s rear panel and are detailed below in Figure 10. The rear panel also has terminal block connections that are described later in this section as is an optional equipment wiring diagram using the terminal block connections. -
Page 24: Wcl488 The "Ieee-488" Connector (Rs232 Optional)
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual WCL488 The “IEEE-488” Connector (RS232 Optional) This is used for computer control and uses a standard IEEE-488 cable (refer to Figure 10). WCL488 AC Input This connection provides the Dynaload with its operating power and its safety ground (refer to Figure 11). -
Page 25: Wcl488 Ac Input Wiring Tips
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Volt, slow blow, 1-1/2 inch American version) or equivalent OR GDC-3.15A-250V (3.15 Amp, 250 Volt, slow blow, 20 mm European version) or equivalent. WCL488 AC Input Wiring Tips A standard U.S. -
Page 26: Wcl488 Relay Connector
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual OFF/ ON U V sw itch IEEE IEEE SL AVE OFF/ ON REL AY COMMUNICAT ION SEL ECT FL UID INL ET FL UID OUT L ET HIGH... -
Page 27: The Wcl488 Terminal Block And Terminal Block Connections
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual the water shutoff relay. The WCL488 Terminal Block and Terminal Block Connections Refer to Figure 14 through Figure 16, and the sections that follow to better understand the wiring connections that can be made to the terminal block. -
Page 28: Rem (Remote Or External Programming)
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual REM (Remote or External Programming) The REM (Remote Program Input [External Modulation]) terminal is the connecting point for remote programming from an external programming source. This input is referenced to S–. This is the remote control input signal. -
Page 29: E- And E+ (Input)
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual slave(s). The Dynaload is supplied with two metal straps between the S–, E– terminals and between the S+, E+ terminals on the terminal strip. These are to facilitate voltage sense wiring when sensing locally. -
Page 30: Wcl488 Terminal Block Connections Optional Equipment Wiring
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual WCL488 Terminal Block Connections Optional Equipment Wiring The terminal block may also be used to include various optional equipment to the Dynaload. In the example shown in Figure 16 an oscilloscope, function generator and remote DC ON/OFF switch are shown installed to the Dynaload. -
Page 31: Recommended Operating Procedure
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Recommended Operating Procedure The following procedure is the recommended procedure for Dynaload operation: (1) AC switch should be turned off. (2) Connect DC source to E+ and E–. Always watch for correct polarity. -
Page 32: Operating Mode Guidelines
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Operating Mode Guidelines CI — Constant Current Mode (Basic Mode) This mode of operation allows the user to set a fixed current. This set level will not change regardless of changes in the source voltage. -
Page 33: Cv - Constant Voltage Mode (Basic Mode)
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual CV — Constant Voltage Mode (Basic Mode) The constant voltage mode can best be described as a shunt regulator or a zener diode. The load will not conduct any current until the source voltage tries to exceed the voltage set point. Once the source voltage is high enough the load will shunt current in order to regulate the voltage. -
Page 34: Local Control
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual programming voltage of 5 volts is required to program the load to 100A. Waveforms can be programmed with the remote programming input as long as they do not exceed the capability of the load. -
Page 35: Undervoltage Lockout
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Category Fault Indicator Description UV — Undervoltage DC ON will not function until voltage is greater than 0.4 Volts (override switch provided on rear panel). See the Major Undervoltage Lockout section below. -
Page 36: Menu Commands
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual ON will be cancelled. Setting the Programmable Under Voltage to zero disables this feature and does not affect the hardware Undervoltage Lockout. Menu Commands The menu commands are accessible through the front panel by pressing the MENU key. Continue to press the MENU key to toggle through the menu selections. -
Page 37: Current Limit Setting
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Current Limit Setting The current limit function acts as a “brick wall”. The load will not permit the current to exceed the numeric set point. When prompted, press ENTER to select this as a function. Then simply enter the value using the numeric keypad and press ENTER. -
Page 38: Front Panel Configuration Memory Set
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual may be coarse in the constant resistance mode. It is up to the users discretion to decide what setting is appropriate. Front Panel Configuration Memory Set The Dynaload has the provision for memory presets. When a memory location is selected, the load will store the exact configuration and state that it currently is operating at. -
Page 39: Lcd Contrast Adjust
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual LCD Contrast Adjust The user has the ability to set the contrast on the alphanumeric display. When prompted, press the ENTER button repeatedly until the contrast of the display is ideal. Then press the CLEAR button to exit this function. -
Page 40: Ieee-488 Programming
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual (4) Use the PEAK button to set the amplitude of the pulse. NOTE: The peak setting is added to the baseline setting. (5) Use the menu button to scroll through the menu’s to set the slew rate. This is set from the factory at 100 microseconds. -
Page 41: Effects Of Cable Inductance On Pulse Loading
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Effects of Cable Inductance On Pulse Loading When the Dynaload is used for high current pulse loading, the effects of cable inductance must be considered. The critical parameters are the rise time and the minimum compliance specifications. -
Page 42: Effects Of Cable Length
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual EXAMPLE: If the previous example required 15 feet of total cable length or 6.25 microhenries, which would be 12.5V of inductive drop, then the capacitor would have to supply 5.5V @ 100A for 50 microseconds. -
Page 43: Table H. Wire Gauge/Ampere Rating Reference Table
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Table H. Wire Gauge/Ampere Rating Reference Table MIL-W-5088 Copper Aluminum Size Single Wire Single Wire c mils/A wire bundled wire bundled 60°C 80°C — — — — —... -
Page 44: Transconductance
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Transconductance One characteristic of power MOSFET’ S is called transconductance. Today’ s MOSFET’ S are designed for high-speed switch mode operation where the operation is full ON or full OFF. The Dynaload uses these FET’... -
Page 45: Wcl488/Wcs Water Cooled Load Systems
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual WCL488/WCS Water Cooled Load Systems The WCL series of water-cooled loads can be provided in a fully configured rack assembly. There are two standard sizes available: the full size rack measuring 60 inches tall, 22 inches wide and 36 inches deep and our Mini-rack which measures 42 inches tall by 22 inches wide by 36 inches deep. -
Page 46: Slave Configuration
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Slave Configuration When configuring a master/slave system, each slave unit must have its bit identifier set in order to communicate correctly with the master. On the rear panel of each slave unit there is a set of DIP switches that must be set to a proper number. -
Page 47: Water Cooled Load Systems Components And Wiring
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Water Cooled Load Systems Components and Wiring The main components of Water Cooled Load Systems are as follows: Main servo unit DC relay (master) Relay (master load) Relay (slave load) -
Page 48: Figure 18. Water Cooled Load Systems Wiring Diagram
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual M ain servo unit D C rela y (m aster) W hite R ed B la ck R elay R elay (m aster load) (sla ve load) W ater shutoff valve (m aste r)*... -
Page 49: Wcs Front Panel Features And Controls
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual WCS Front Panel Features and Controls To better understand the features and controls of the front panel, refer to the information below and Figure 19 (for clarity, the unit’ s rack-mount handles and equipment mounting details have been removed). -
Page 50: Wcs Rear Panel Electrical Connections
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual WCS Rear Panel Electrical Connections All electrical and electronic connections are made on the unit’ s rear panel and are detailed below Inpu t volta ge selector G rou nd connection... -
Page 51: Wcs Ac Input
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual WCS AC Input This connection provides the Dynaload with its operating power and its safety ground (refer to Figure 21). Power requirements are user selectable and described below in Table I. -
Page 52: Wcs Fuse Replacement
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual WARNING: The power cord provides a chassis ground through a third conductor. Make sure that your power outlet is of the 3-conductor type with the correct pin connected to earth ground. Always Connect the AC cord first to your Dynaload and THEN to the utility outlet. -
Page 53: Wcs Relay Connector
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual OFF/ ON U V sw itch SEL ECT SL AVE OFF/ ON SLAVE ADDR REL AY COMMUNICAT ION FL UID INL ET FL UID OUT L ET HIGH... -
Page 54: Wcs Chassis Ground Connection
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual WCS Chassis Ground Connection Referring to Figure 23 above, as with the WBL488, the chassis ground connection is used to ground the third wire of the unit’ s water shutoff relay. -
Page 55: Chapter 3 - Ieee-488 Commands And Programming
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Chapter 3 — IEEE-488 Commands and Programming Introduction The purpose of this section is to describe the IEEE-488 commands for operating your programmable Dynaload. This section assumes that your WCL488 has been installed, is operating properly, and that an IEEE-488 bus controller has been attached to it. -
Page 56: Data Separators
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Data Separators It is not necessary to separate numerical data from the previous command by any character. White space is ignored. The use of a space is recommended, however, as it aids in command string legibility. -
Page 57: Table L. Numerical Data Units
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Table L. Numerical Data Units Item Description Unit Format First resistance value (A/V mode) Amps/Volt Amps/Volt Second resistance value (A/V mode) Amps/Volt Amps/Volt Constant resistance setpoint (High A/V) Amps/Volt... -
Page 58: Power-On Defaults
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Power-on Defaults The following table indicates the factory default conditions are in effect every time the load is switched on. This can be re-configured by the user in memory location zero (0). -
Page 59: Commands
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Commands The basis of the WCL488 syntax is the instrument control commands. Each command sends an instruction to the Dynaload. A query command requests information from the Dynaload. -
Page 60: Command And Queries Listed Alphabetically
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Command and Queries Listed Alphabetically AV1 <NR2> Set Amps/Volt pulse base level AV1? Read Amps/Volt pulse base setting AV2 <NR2> Set Amps/Volt pulse peak level AV2? Read Amps/Volt pulse peak setting Read Amps/Volt setting AVH <NR2>... - Page 61 TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual LOAD? Read load connect relay setting LOCK OFF Unlock front panel LOCK ON Lock front panel LOCK? Read front panel lock setting MODE? Read mode MR <NR1> Memory Recall MS <NR1>...
- Page 62 TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Read pulse peak duration TEXT OFF Set numeric query responses TEXT ON Set descriptive query responses TEXT? Read Text on/off setting UV <NR2> Set programmable Under Voltage Read programmable Under Voltage setting Read Voltage V1 <NR2>...
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Page 63: Commands And Queries Listed By Category
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Commands and Queries Listed by Category Configuration LAT <NR1> Set the fault Latch register LAT? Read the Latch register setting LOCK OFF Unload front panel LOCK ON Lock front panel... -
Page 64: Operation Modes
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual RNG? Read Voltage/Current Range status Operation Modes Read Amps/Volt setting AVH <NR2> Set Amps/Volt High mode AVL <NR2> Set Amps/Volt Low mode CI <NR2> Set Constant Current Mode Read Constant Current setting CP <NR2>... -
Page 65: Pulsing Level Parameters
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual WF OFF Set Square Wave pulsing off Pulsing Level Parameters AV1 <NR2> Set Amps/Volt pulse base level AV1? Read Amps/Volt pulse base setting AV2 <NR2> Set Amps/Volt pulse peak level... -
Page 66: Status Related Commands
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Status Related Commands CON? Read Condition register ERR? Read Error Register LAT <NR2> Set the fault Latch register LAT? Read the Latch register setting SBE <NR1> Set Summary Bit Enable register... -
Page 67: Detail Language Elements
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Detail Language Elements This is an alphanumerical listing that gives the syntax and required parameters for all elements in the programmable load’ s syntax. The syntax is generic for all load ratings. -
Page 68: Av2 Amps/Volt Pulsing Peak Level
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual AV2 Amps/Volt Pulsing Peak Level Description This command is used to set the peak level relative to the base level when pulse loading in the Amps/Volt mode. NOTE: AVL or AVH must have been previously set. -
Page 69: Avl Amps/Volt Low
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual AVL Amps/Volt Low Description This command places the load into Amps/Volt Low mode at the specified level. Command Syntax AVL <NR2> Example AVL 2.5 This will place the load in Amps/Volt Low mode at 2.5 Amps per Volt. -
Page 70: Con? Condition Register
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual CON? Condition register Description This query returns the contents of the Condition register and clears its contents. The response is either numeric or a text description depending on the TEXT ON/OFF setting. -
Page 71: Cp Constant Power
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual CP Constant Power Description This command places the load into Constant Power mode at the specified level. Command Syntax CP <NR2> Example CP 20.0 This will place the load in Constant Power at 20 Amps. -
Page 72: Crl Constant Resistance Low
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual CRL Constant Resistance Low Description This command places the load into Constant Resistance Low mode at the specified level. Command Syntax CRL <NR2> Example CRL 1.5 This will place the load in Constant Resistance Low mode at 1.5 Ohms. -
Page 73: Du Duty Cycle
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual DU Duty Cycle Description This command is used to set the Duty Cycle for square wave pulsing. This defines the percentage of peak pulse time and will set the Pulsing Base Time (T1) and Pulsing Peak Time (T2) accordingly based upon the defined frequency. -
Page 74: Err? Error Register
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual ERR? Error Register Description This query returns the contents of the Error register and then clears its contents. The response is either numeric or a text description depending on the TEXT ON/OFF setting. -
Page 75: Fq Frequency
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual FQ Frequency Description This command is used to set the Frequency in Hertz for square wave pulsing. The Pulsing Base Time (T1) and Pulsing Peak Time (T2) will be adjusted accordingly based upon the defined duty cycle. -
Page 76: I1 Constant Current Pulsing Base Level
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual I1 Constant Current Pulsing Base Level Description This command is used to set the base level when pulse loading in the Constant Current mode. Command Syntax I1 <NR2>... -
Page 77: Il Current Limit
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual IL Current Limit Description This command is used to set the Current Limit set point. The Current Limit circuit will not allow the load current to exceed this level. -
Page 78: Lat Latch Register
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual LAT Latch register Description This command provides access to the Latch register. The bits in this register define which bits of the Condition (CON) register will latch on if set until the CON register is read. Setting one bit by writing its bit weight into the LAT register enables its equivalent bit in the CON register. -
Page 79: Load Load On/Off Control
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual LOAD Load On/Off Control Description This command is used to instruct to load to close its load connect relay and apply loading, or to open its connect relay removing the load from the device under test. -
Page 80: Mode? Operating Mode
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual MODE? Operating Mode Description This query returns the load’ s operating mode. The response is either numeric or a text description depending on the TEXT ON/OFF setting. The returned value will be the sum of the individual bit weights of the mode plus any mode modifiers. -
Page 81: Mr Memory Recall
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual MR Memory Recall Description This command recalls the load’ s setup stored in the specified memory location. The memory location number must be a value from 1 through 9. -
Page 82: P1 Constant Power Pulsing Base Level
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual P1 Constant Power Pulsing Base Level Description This command is used to set the base level when pulse loading in the Constant Power mode. Command Syntax P1 <NR2>... -
Page 83: R1 Constant Resistance Pulsing Base Level
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual R1 Constant Resistance Pulsing Base Level Description This command is used to set the base level when pulse loading in the Constant Resistance mode. NOTE: CRH or CRL must have been previously set. -
Page 84: Rng Range
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual RNG Range Description This command is used to set the load’ s Voltage and current range settings. This is done by writing a value from 1 through 9 as indicated below. -
Page 85: Rst Reset
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual RST Reset Description This command resets the load to its factory default power-on settings. Command Syntax Example This will reset the load to its factory default power-on settings. -
Page 86: Sbe Summary Bit Enable Register
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual SBE Summary Bit Enable register Description This command provides access to the Summary Bit Enable register. The bits in this register define which bits of the Condition (CON) register will set the Major Fault and Minor Fault summary bits in the Status Register (STA). -
Page 87: Sdn Shutdown Register
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual SDN Shutdown register Description This command provides access to the Shutdown register. The bits in this register define which bits of the Condition (CON) register will cause the load to shutdown. Setting one bit by writing its bit weight into the SDN register enables its equivalent bit in the CON register. -
Page 88: Sf Slew Fast
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual SF Slew Fast Set for fast slew range Description This command is used to set the slew rate limiter to the fast range. In the fast range, full-scale rise and fall times can be programmed between 10 µ... -
Page 89: Srq Service Request Register
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual SRQ Service Request Register Description This command provides access to the Service Request register. In IEEE-488 equipped units the bits in this register define which bits of the Status Register (STA) will generate a service request. A query form is provided so the setting can be read back. -
Page 90: Ss Slew Slow
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual SS Slew Slow Description This command is used to set the slew rate limiter to the slow range. In the slow range, full-scale rise and fall times can be programmed between 1,000 µ... -
Page 91: Sta? Status Register
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual STA? Status Register Description This query returns the contents of the Status register and then clears its contents. The response is either numeric or a text description depending on the TEXT ON/OFF setting. -
Page 92: Sw Square Wave Pulsing
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual SW Square Wave Pulsing Description This command is used to turn on and off Square Wave pulsing. It functions exactly the same as the WF command with all the same forms. -
Page 93: T2 Pulsing Peak Time
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual T2 Pulsing Peak Time Description This command is used to directly set the peak time in microseconds for square wave pulsing. This will also set the Duty Cycle (DU) and Frequency (FQ) accordingly based upon the Pulsing Base Time (T1). -
Page 94: Uv Under Voltage
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual UV Under Voltage Description This command is used to set the Programmable Under Voltage threshold. When the input voltage drops below this threshold the load will disconnect from the device under test and indicate an Under Voltage fault. -
Page 95: V1 Constant Voltage Pulsing Base Level
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual V1 Constant Voltage Pulsing Base Level Description This command is used to set the base level when pulse loading in the Constant Voltage mode. NOTE: When pulsing in constant voltage mode, higher voltage corresponds to less drive. -
Page 96: V2 Constant Voltage Pulsing Peak Level
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual V2 Constant Voltage Pulsing Peak Level Description This command is used to set the peak level relative to the base level when pulse loading in the Constant Voltage mode. In Constant Voltage, peak refers to peak drive hence lower Voltage. -
Page 97: Wf Waveform
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual WF Waveform Description This command is used to turn on and off Square Wave pulsing. It functions exactly the same as the SW command with all the same forms. -
Page 98: Xm External Modulation
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual XM External Modulation Description This command places the load in Remote Programming mode. In this mode a 0 to 10V signal at the load’ s Remote Programming Input terminal on the back of the unit will program the load from zero to full scale of the selected range. -
Page 99: Status And Error Register
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Status and Error Register The load status drawing shows the logical relationship between the status registers. Three of the registers, the condition (CON) register, the error (ERR) register, and the status (STA) register reflect the condition of the load. -
Page 100: Figure 25. Load Status Structure
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Figure 25. Load Status Structure Page 90 402828, Rev. B1... -
Page 101: Glossary
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Glossary This glossary includes explanations and definitions of terms that may be found in this manual or encountered while working with the Dynaload. Many of these words are commonly used in electrical, electronic and computer related technologies. - Page 102 TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Apparent Power Power attained in an AC circuit as a product of effective voltage and current (which reach their peak at different times). Astable Circuit that does not have a stable state and as a result oscillates at a frequency dependent upon component values.
- Page 103 TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Byte A sequence of adjacent bits operated on as a unit by a computer. Capacitance Ability of a capacitor to store an electrical charge. The basic unit of capacitance is the Farad.
- Page 104 TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Continuity The state that occurs when a complete path for current is present. Current Passage of electrons measured in amps (milliamps and microamps). D/A Conversion Digital-To-Analog Conversion. Translating discrete data into continuously varying signals.
- Page 105 TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Emitter One of three terminals of a transistor. Farad Basic measuring unit of capacitance. Feedback Portion of the output signal of an amplifier that is connected back to the input of the same amplifier.
- Page 106 TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Handshaking Exchange of signals (usually part of a communications protocol) between two devices to establish a connection. Henry Basic unit of inductance. Hertz Number of cycles per second for any periodic waveform (measured in cycles per second).
- Page 107 TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Kilowatt - hour Unit of energy when one kilowatt of power is expended for one hour. Leakage Passage of small electric current through an insulator or dielectric that is unintended and undesirable.
- Page 108 TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Matched Condition that exists when the output impedance of a source is equal to the Impedance input impedance of a load. Megohm One million ohms (represented by the symbol “ M” ).
- Page 109 TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Normally Open When the contacts of a switch or relay are normally open or not connected. When activated the contacts close or are connected. Transistor using n-type p-type n-type semiconductor material.
- Page 110 TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Parallel Circuit Circuit having two or more paths for current flow. Passive Component that does not amplify a signal (such as resistors and capacitors). Component Printed Circuit Board. See also PWB.
- Page 111 TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Real Time Data that is immediately acted upon rather than being accumulated and processed at a later time. Rectifier AC-to-DC converter with output typically connected in parallel with battery backup.
- Page 112 TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Short-Circuit Unintended path that conducts electricity that typically causes excessive current. Signal Impulse or a fluctuating electric quantity, such as voltage, current, or electric field strength, whose variations represent coded information.
- Page 113 TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Switch Device for connecting and disconnecting power to a circuit. Telemetry Usually refers to transmission of alarm, status, and other information by an embedded data channel multiplexed into a digital bit stream.
- Page 114 TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Troubleshooting A methodical or systematic series of steps for locating the cause of a fault or problem in an electronic circuit or system. Tuned Circuit Circuit in resonance at a particular frequency.
- Page 115 TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Voltage Rating The maximum voltage a component can withstand without breaking down. Voltage A circuit or device that maintains a constant output voltage even when there Regulator is changing line voltage and/or load current.
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Page 116: Appendix A - List Of Commands
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Appendix A — List of Commands AV1 <NR2> LOCK OFF SW [<NR1>] AV2 <NR2> LOCK ON SW OFF AVH <NR2> MR <NR1> T1 <NR2> AVL <NR2> MS <NR1>... -
Page 117: Appendix B - List Of Queries
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Appendix B — List of Queries AV1? SDN? AV2? LAT? SRQ? LOAD? STA? CON? LOCK? MODE? ERR? VER? RNG? SBE? Page 107 402828, Rev. B1... -
Page 118: Appendix C - Wcl488 Outline Drawings
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Appendix C — WCL488 Outline Drawings Page 108 402828, Rev. B1... -
Page 119: Appendix D - Wcs Outline Drawings
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Appendix D — WCS Outline Drawings Page 109 402828, Rev. B1... -
Page 120: Appendix E - Flow Control Servo Installation
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Appendix E — Flow Control Servo Installation 1/2 inch dia . x 2 inch long bra ss nip ple U se pip e seala nt W ater servo cable... -
Page 121: Appendix F - Dc Power Contactor Recommended Installation
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Appendix F — DC Power Contactor Recommended Installation C on ta ctor 3/8- 16 x 1-1/2 (2 places) R elay co nnecto r NO TES: R ed w ires to relay con nector (+ a nd –, no polarity). -
Page 122: Appendix G - Troubleshooting Guide
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Appendix G — Troubleshooting Guide The information immediately below includes a brief description of fault conditions and indicators. The balance of this appendix addresses symptoms, possible causes, and explanations and corrective actions. - Page 123 TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Troubleshooting (Symptoms/Possible Causes/Explanations and Corrective Actions) Symptom Possible Cause Explanation/Corrective Action AC power button does AC input fuse on the rear panel Check fuse and replace as not function.
- Page 124 TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Symptom Possible Cause Explanation/Corrective Action Load powers up but The under voltage switch on the With the “ UV” switch in the on the “ SYS” and “ UV”...
- Page 125 TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Symptom Possible Cause Explanation/Corrective Action Load powers up, The “ EXT PROG” button or a Pressing the “ EXT PROG” or a “ Loads On” but will range button has been pressed range button will reset the current not draw current.
- Page 126 TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Symptom Possible Cause Explanation/Corrective Action Load is set to draw a DC voltage applied to the load Raise the input voltage. current. The current is is too low.
- Page 127 TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Symptom Possible Cause Explanation/Corrective Action During normal One or more power modules in Send the unit in for service. operation the loads red the power tray are overheating.
- Page 128 TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Symptom Possible Cause Explanation/Corrective Action System does not All slave units not powered up Apply AC power to all slave units. recognize total (AC). number of slave units...
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Page 129: Appendix H - Specifications By Model
TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Appendix H — Specifications by Model Page 119 402828, Rev. B1... - Page 130 TDI-Dynaload Division WCL488 Series Water Cooled Electronic Loads Operation & Programming Manual Page 120 402828, Rev. B1...
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