background image

INSTRUCTION 

MANUAL

 - MODEL

 

DLP 400-5-750A

2

2.0

 SPECIFICATIONS

The following

 

ratings

 

apply:

LOAD 

VOLTAGE:

 

10 

TO

 

400V 

LOAD 

CURRENT: 0

 

TO

 5A 

POWER 

DISSIPATION:

 0

 

TO 750W

 

OVERLOAD

 RATING: 

10 

%

SELF-PROTECTION

 

 

OVERVOLTAGE:

 

<500V 

OVERCURRENT:

 

<7

A

 

OVERPOWER:

 

<1000W

2 .1

 

MODE 

SELECTOR SWITCH

 

POSITION

 

(From

 

left

 to

 

right)

POSITION

 

1

:

POSITION

 2

:

POSITION

 

3

:

POSITION 4

:

POSITION

 

5

:

POSITION

 

6:

POSITION

 7

:

POSITION

 

8

:

Constant

 

resistance

 

0-.01 A/V 

as

 

determined

 

by the

 

front

 

panel

 DC

 

load 

adjust

Constant

 

resistance

 

0-.03

 A/V

 

as

 

determined

 

by

 

the 

front

 

panel 

DC

 

load 

adjust

Constant

 

current

 

0-1A

 

as

 

determined

 

by 

the

 front

 

panel

 

DC

 

load

 

adjust

Constant current 0-5A 

as

 

determined by 

the

 

front

 

panel

 

load

 

adjust

Constant 

voltage

 load. In 

this

 

position, 

the

 

load 

is

 

similar to

 a

 

battery

 

being 

charged

 

or 

a

 constant

 

voltage

 zener 

diode;

 

no 

current 

is drawn

 

until 

the 

source voltage 

reaches

 

the regulating 

voltage.

 

The

 

voltage

 

at

 

which 

the 

Dynaload

 

regulates

 

is 

adjustable by the

 

front

 

panel

 volts 

control.

External 

modulation

 

— 

will

 

program 

from 

0-5A

 with 

0-6V

 

applied to

 the

 

external 

modulation

 

terminals 

(TB1)

.

 

Modulation

 

sensitivity

 is

 

directly

 

adjustable 

by

 

the

 

front

 

panel

 

DC

 

load

 

adjust 

control.

Pulse 

 

square

 

wave

 

pulse

 

lo<iji which

 

may 

be 

varied

 from

 

0-5A

 

and 500-5000

 

Hz 

as

 

desired

 

by

 

the

 

front

 

panel

 

pulse

 

controls

.

Short — 

short

 circuit 

which

 

is 

applied

 

in

 

series 

with

 

the ammeter

 

across

 

the

 

input

 allowing

 

short

 

circuit 

current 

tests

.

[ELP400-5-750A]

Содержание Dynaload DLP-400-5-750A

Страница 1: ...TDI Transistor Devices Dynaload Model DLP 400 5 750A Operator s Manual MAY 1988 DYNALOAD DIVISION 36A NEWBURGH ROAD HACKETTSTOWN NJ 07840 Phone 908 850 5088 Fax 908 850 0679...

Страница 2: ...E MODE 6 AMPS VOLT 3 2 1 CONSTANT CURRENT MODE 7 3 3 EXTERNAL MODULATION 9 3 4 PULSE MODE 10 3 5 SHORT CIRCUIT 10 3 6 CONSTANT VOLTS MODE 11 3 7 POWER RATING 11 3 8 PROTECTIVE CIRCUITS 11 3 9 SPECIAL...

Страница 3: ...S 18 5 2 0 01A V MODE 19 5 3 0 03A V MODE 20 5 4 0 1A MODE 21 5 5 0 5A MODE 21 5 6 VOLTS 22 5 7 EXTERNAL MODULATION MODE 22 5 8 PULSE 23 5 9 SHORT CIRCUIT 24 5 10 CURRENT LIMIT POWER LIMIT PROTECTION...

Страница 4: ...mps 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 a zener diode Provisions are...

Страница 5: ...ust Constant current 0 5A as determined by the front panel load adjust Constant voltage load In this position the load is similar to a battery being charged or a constant voltage zener diode no curren...

Страница 6: ...this switch should be opened NOTE WHEN TESTING LOW CURRENT SOURCES IT MAY BE ADVISABLE TO USE AN EXTERNAL FUSE OR CIRCUIT BREAKER TO PROTECT THE SOURCE CAUTION THE METER RANGE SELECTOR SWITCH SHOULD A...

Страница 7: ...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 connected to the minus terminal...

Страница 8: ...standard 115V 50 60 Hertz power source optional input voltage ranges are available F Connection the source to the load terminals of the Dynaload E and E on the rear of the unit Two terminals are prov...

Страница 9: ...tation may be used to obtain further accuracy and eliminate the effects of leakage currents in the Dynaload or line voltage drops at high currents 3 1 CONSTANT RESISTANCE MODE AMPS VOLT Two scales are...

Страница 10: ...he Dynaload or for use at very low currents There are minor leakage currents of a few milliamperes in the Dynaload instrumentation which do not pass through the Dynaload ammeter voltmeter current volt...

Страница 11: ...amperes position 0 1A B Turn on the power source and the Dynaload and set the power source to the desired output voltage assume 100V C Turn the coarse and fine DC load adjusts until 1A of load current...

Страница 12: ...to the negative lead of the Dynaload The Dynaload will program from 0 5A as the external modulation voltage is programmed from 0 6V if the DC load adjustments are set in the maximum clockwise positio...

Страница 13: ...ntrols should be turned fully counterclockwise The maximum total of the pulse and DC load will be limited around 5 5A by the internal current limit protection 3 5 SHORT CIRCUIT The short circuit mode...

Страница 14: ...not occur the rear of the Dynaload should be clear for the air intake and the air exhaust The cooling air enters and leaves from the rear The Dynaload should periodically be checked for dust accumulat...

Страница 15: ...the input voltage is increased thereby limiting the maximum power which may be programmed into the Dynaload 3 9 SPECIAL APPLICATIONS The Dynaload may be used for AC load testing within its ratings by...

Страница 16: ...peration particularly the external modulation function 4 2 VOLTMETER CALIBRATE A With the Dynaload set for no load place an external calibrated voltmeter across the input terminals of the Dynaload and...

Страница 17: ...range selector switch at 0 6A increase the load until the external ammeter reads 0 4A E Adjust R38 so that the front panel ammeter also reads 0 4A F Switch the ammeter selector switch to 1 8A and adju...

Страница 18: ...to the input terminals of the Dynaload and adjust the 03A V calibrate potentiometer R30 so that between 3 and 3 2A of load current is obtained With the Dynaload in the 0 03A V position and the load a...

Страница 19: ...imum clockwise position and adjust R19 to obtain between 5 and 5 2A E Make sure that the current limit setting is not interacting in any way 4 7 EXTERNAL MODULATION A With 5VDC applied apply a 6 00 Vo...

Страница 20: ...s on external meter D Adjust R72 for a reading of 500 volts on the digital meter 4 10 SQUARE ADJUST A Connect an oscilloscope to the current sample output B Set mode select to pulse mode C Adjust the...

Страница 21: ...13 Rll and zener diode VR6 The 25V is regulated to 16V by constant current source QI and its associated components Rl VR5 R3 R2 and zener diodes VR2 and VR3 which generate 16V and 8V Secondary 6 7 of...

Страница 22: ...hares the input voltage equally Three of the banks consisting of Q103 through Q107 Q108 through Q112 Q113 through Q117 are slave banks to the actual regulating bank consisting of Q118 through Q122 whe...

Страница 23: ...esistive load The maximum voltage that can be applied to the non inverting input is limited by R24 and R54 so that approximately only 10 millamperes of current can be drawn for each volt at the input...

Страница 24: ...on the inverting and non inverting inputs of U1 These two points are controlled only by the voltage reference supplied to Pin 5 and the current through the shunt which means a constant amount of curr...

Страница 25: ...R17 and R18 to the inverting input of U1 replacing the current feedback loop Accordingly if the input voltage tends to exceed the voltage selected by the volts control on the front panel U1 condutcs m...

Страница 26: ...rises driving the power circuit The current then rises until the voltage across the shunt is sufficient to raise the voltage at the inverting input turning U1 off If a portion of the voltage on the no...

Страница 27: ...on 5 10 CURRENT LIMIT POWER LIMIT PROTECTION The voltage proportional to load current generated across SHI is applied through R7 to the base of Q3 The voltage reference generated by zener diode VR8 is...

Страница 28: ...t so that at 150V input it is impossible to draw more than 6A 5 11 INSTRUMENTATION CIRCUITS Range selector switches and calibrating resistors are provided for the front panel ammeter and voltmeter 5 1...

Страница 29: ...9 CRI04 PULSE ON CURRENT _ SAMPLE4 SI 12 GA UNLESS OTMERwisi SPECIFIED DIMENSIONS ARE IN INCHES TOLERANCES ANGLES t FRACTIONS t 1 PLACE DECIMALS t 2 ruiCt DECIMALS t 1 PLACE DECIMALS t material SHIOI...

Отзывы: