Summary of Contents for TDI Dynaload DLP-400-5-750A
- Page 1 ransistor Devices ynaload odel LP-400-5-750A ’ perator anual AY, 1988 YNALOA IVISION 36A NEWBURGH ROA , HACKETTSTOWN, NJ 07840 Phone (908) 850-5088 Fax (908) 850-0679...
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Page 2: Table Of Contents
NSTRUCT ON MANUAL - MODEL DLP 400-5-750A TABLE OF CONTENTS Page NTRODUCT ON SPEC F CAT ONS MODE SELECTOR SW TCH POS T ON FRONT PANEL CONTROLS REAR PANEL CONNECT ONS OPERAT NG NSTRUCT ONS CONSTANCE RES STANCE MODE (AMPS/VOLT) 3.2 1 CONSTANT CURRENT MODE EXTERNAL MODULAT ON PULSE MODE... - Page 3 NSTRUCT ON MANUAL - MODEL DLP 400-5-750A TABLE OF CONTENTS (Continued) Page OVERPOWER PROTECT ON CURRENT SAMPLE 4.10 SQUARE ADJUST THEORY OF OPERAT ON NPUT C RCU TS 0-.01A/V MODE 0-.03A/V MODE 0-1A MODE 0-5A MODE VOLTS EXTERNAL MODULAT ON MODE PULSE SHORT C RCU T 5.10 CURRENT L M T/...
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Page 4: Ntroduct On
NSTRUCT ON MANUAL - MODEL DLP 400-5-750A NTRODUCT ON The Dynaload is a precision instrument which simulates electrical loads to test power supplies, generators, servo systems, batteries, and similar electrical power sources. t simulates, at the option of the user, resistive loads (amps/volt) or may be switched to a constant current load characteristic (current regulated at a pre-selected value) or a constant voltage type of load (similar to a battery or... -
Page 5: Spec F Cat Ons
NSTRUCT ON MANUAL - MODEL DLP 400-5-7 50A SPEC F CAT ONS The following ratings apply: LOAD VOLTAGE: 10 TO 400V LOAD CURRENT: 0 TO 5A POWER D SS PAT ON: 0 TO 750W OVERLOAD RAT NG : 10 % SELF-PROTECT ON —... -
Page 6: Front Panel Controls
NSTRUCT ON MANUAL MODEL DLP 400-5-750A FRONT PANEL CONTROLS S115: AC ON/OFF switch and indicator lamp Load current range as selected by front panel current range select switch, 0-.6A, 0-1. 8A, or 0-6A F2 : nput Fuse. This fuse will automatically open in the event of an overvoltage overcurrent condition. -
Page 7: Rear Panel Connect Ons
NSTRUCT ON MANUAL - MODEL DLP 4005-7 50A REAR PANEL CONNECT ONS ; Plus load — connect to positive terminal of source to be tested E- : Minus load — connect to minus terminal of source to be tested TB1-1 ; 0 to +6V programming voltage input TB1-2: Programming voltage return internally... -
Page 8: Operat Ng Nstruct Ons
NSTRUCT ON MANUAL - MODEL DLP 400-5-7 50A — 5 OPERAT NG NSTRUCT ONS The following procedure is recommended for hooking up the Dynaload: Set the AC and DC Dynaload ON/OFF switches to off. Set the meter range switches in their maximum voltage and current positions. -
Page 9: Constance Res Stance Mode
NSTRUCT ON MANUAL - MODEL DLP 400-5-750A f the DC input fuse blows, or if there is no indication of source voltage, check the external hook-up wiring to see that all connections are tight and secure. To increase the load, turn the load adjust controls slowly clockwise until the appropriate load is obtained. -
Page 10: Constant Current Mode
NSTRUCT ON MANUAL - MODEL DLP 400-5-7 50A — 7 Slowly turn the coarse and fine DC load adjusts to obtain the 1A load, while monitoring the source voltage on the front panel voltmeter. For precision settings at high load currents, it is desirable to use an external voltmeter con ... - Page 11 NSTRUCT ON MANUAL - MODEL DLP 400-5-750A this type of test, it would be necessary to reset the load each time the power supply voltage was changed in order to maintain the full load current. Accordingly, the following procedure should be used: With the load adjustments turned counterclockwise, and the DC load switch off, and the Dynaload meters in their maximum voltage and current...
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Page 12: External Modulat On
NSTRUCT ON MANUAL MODEL DLP 400-5-750A constant resistance characteristic should be used as a load when simulating short circuit protection and recovery of most solid state power supplies unless otherwise specified by the manufacturer. EXTERNAL MODULAT ON n the external modulation mode, the Dynaload acts as a constant current load with the constant current proportional to the external voltage applied to TB1-1 and TB1-2. -
Page 13: Pulse Mode
NSTRUCT ON MANUAL - MODEL DLP 400-5-7 50A PULSE MODE n the pulse mode the Dynaload places a pulsating square wave load on the input voltage source. This pulse load may be varied from 0-5A peak current by the pulse amplitude control on the front panel. -
Page 14: Constant Volts Mode
NSTRUCT ON MANUAL - MODEL DLP 400-5-7 50A CONSTANT VOLTS MODE n the constant volts mode, the Dynaload acts as an adjustable power zener diode. The regulating voltage is programmable from approximately 15-400V by the front panel volts adjust control. The constant volts position is used to simulate a battery to a battery charger, or the Dynaload may also be used as a shunt regulator for special... -
Page 15: Spec Al Appl Cat Ons
NSTRUCT ON MANUAL - MODEL DLP 400-5-7 50A thereby protecting all internal circuits. f the source current is large enough, the DC input fuse will blow. the source should be damaged by a 10A load or is not short-proof, it may be desirable to incorporate an external fuse or circuit breaker to protect the source. -
Page 16: Cal Brat On Procedures
NSTRUCT ON MANUAL - MODEL DLP 400-5-7 50A CAL BRAT ON PROCEDURES L NEAR TY With all load adjustments in the counterclockwise position and mode selector switch in the off position (apply 5VDC) . Adjust R68 clockwise until current is flowing. Slowly adjust R68 counterclockwise to reach between 0 and 5 millamps of current. -
Page 17: Ammeter Cal Brate
NSTRUCT ON MANUAL - MODEL DLP 400-5-7 50A AMMMETER CAL BRATE Use an external 100V source and an external ammeter for calibration. Turn the Dynaload adjust to the minimum counter clockwise position Set the mode selector switch to the constant current 0-5A position With the ammeter range selector switch at 0.6A, increase the load until the external ammeter reads... -
Page 18: Amperes Per Volt Cal Brate
NSTRUCT ON MANUAL - MODEL DLP 400-5-7 50A AMPERES PER VOLT CAL BRATE With the Dynaload in the 0-.01A/V position, and the DC load adjust in the maximum clockwise position, apply a voltage of 200V to the input terminals of the Dynaload and adjust the A/V calibrate potentiometer R54 so that between 2 and 2.2A of load current is obtained. -
Page 19: Current Cal Brate
NSTRUCT ON MANUAL - MODEL DLP 400-5-7 50A — 16 CURRENT CAL BRATE Set the mode selector switch to the 0-1A constant current position. Using a 100V source, turn the DC load potentiometer in the maximum clockwise position and adjust R56 to obtain between 1 and 1.2A. Set the mode selector switch to the 0-5A constant current position. -
Page 20: Current Sample
NSTRUCT ON MANUAL - MODEL DLP 400-5-7 50A CURRENT SAMPLE With 100VDC applied to the load, connect a digital volt meter to the current sample output. Set mode select to 0-5A constant current Set DC load adjust for 5.00 amps on external meter . -
Page 21: Theory Of Operat On
NSTRUCT ON MANUAL - MODEL DLP 400-5-750A THEORY OF OPERAT ON NPUT C RCU TS A schematic diagram is provided in back. AC power is applied through the line cord, through fuse F101, and AC ON/OFF switch S115 to the AC indicator lamp, blowers B101 and B102, and the primary of T1 and T101. -
Page 22: 01A/V Mode
NSTRUCT ON MANUAL - MODEL DLR 400-5-7 50A The DC load current is provided by four groups of five power transistors — typically Q103 through Q107 . Due to the high input voltage requirements, these groups are connected in series. A voltage divider taken from bias supply developed by components on PCB board A2 is fed through a divider consisting of R4-R11-R12-R13 to ground. -
Page 23: 03A/V Mode
NSTRUCT ON MANUAL - MODEL DLP 400-5-7 50A As current flows through the pass transistors, the top of SH101 (+) becomes more and more positive, until the voltage at Pin 4 becomes equal to that of Pin 5, causing Ul to regulate the current through the pass transistors. -
Page 24: 0-1A Mode
NSTRUCT ON MANUAL - MODEL DLP 400-5-750A — 21 0-1A MODE An internal voltage reference (6V) is generated by series-dropping R14 and zener diode VR8, which in turn is reduced by the voltage divider network of R56, R21, R125A, and R125B. A portion of this voltage determined by the DC load adjust control is fed into the non-inverting input of U1 (Pin 5) . -
Page 25: Volts
NSTRUCT ON MANUAL - MODEL DLP 400-5-750A input of U1 . This increased voltage requires approximately 5A of current to flow through the shunt, SH101, before there is a sufficient voltage drop to cause U1 to regulate the current through the pass structure. VOLTS n the volts mode, the Dynaload is converted into a constant voltage regulator at the input terminals similar to... -
Page 26: Pulse
NSTRUCT ON MANUAL - MODEL DLP 400-5-75 OA — 23 PULSE This mode converts the Dynaload into a pulse load, which may be varied in amplitude and frequency as well as superimposed upon a fixed DC load. The pulse is generated by a CA3140E operational amplifier. -
Page 27: Short C Rcu T
NSTRUCT ON MANUAL - MODEL DLP 400-5-75 OA SHORT C RCU T The short circuit mode is a contactor that places the ammeter directly across the Dynaload input for short circuit current tests; all three ammeter ranges may be used in this mode . -
Page 28: Nstrumentat On C Rcu Ts
NSTRUCT ON MANUAL MODEL DLP 400-5-750A as the voltage is increased by adding a voltage to the current signal so that the current limit point is reduced as the input voltage rises. To make a more accurate constant power curve, VR4 is introduced when the voltage across R6 and R7 reaches approximately 30V. - Page 29 tsanmoN • Wl*b rpft 124W tiox MfiU to OiWi JiOl.Tti, PCB ASSEMBLY C 110523 KEV/3£ *2<«,F*.R5) O.UAOJ C ^ 5 1^N344 ■ M Wv-+ 820K ING47 2°/ o IN645 5. UK HCRl ?CR3 R8 « IN5O6O IN 5060 IOK* ■ 2w ‘...