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HP StorageWorks 1000 - Modular Smart Array Handleiding voor programmering

Use the constant current test setup (fiQure 9-5) except

set RL 1 and RL2 to approximately 3.5 ohms each and

use a 0.01 ohm resistor for current sampling resistor RS.

Connect the power supply to the HP 1000 and turn it on.

Allow a 30-minute warm up period.

Adjust constant current (CC) zero output by connecting

an oscilloscope to the +S and

-S

terminals and repeat-

ing one and two below.

Alternately program data words 2000 (zero high

range) and 1000 (zero low range) with a 50msec

(approx.) delay between data words. Programming

these words consecutively in FORTRAN

is close

enough

If this

a problem, use a "DO" loop be-

tween programming

statements.

Adjust

the

ZERO

ADJUST

potentiometer

(A300R19) and the ZERO BALANCE ADJUST

potentiometer (A300R4) for a straight line at zero as

indicated on the scope. Potentiometers are adjusted

simultaneously

to obtain the desired scope

indication.

Adjust CC high range full scale outPl:lt by programming

data word 2999 and adjusting A300R7 for a reading of

.0999V

on a digital voltmeter (connected across R(S) as

shown in figure 9-5).

Adjust CC low range full scale output by programming

data word 1999 and adjusting A300R9 for a reading of

.01998V on a digital voltmeter (connected across R(S)).

Recheck adjustments. If necessary, repeat steps e

through g above.

Turn off the supply and connect a short across the rear

output terminals.

Set the mode switches to CC and turn on the supply.

Program the supply for the desired output current.

Open the output terminals and adjust the front panel

VOLTAGE control for the desired maximum output vol

tage. If a load change causes the voltage limit to be

exceeded, the supply automatically crosses over to con-

stant voltage operation at this pOint voltage limit and the

output current drops proportionally.

9-5

HP 6002A/HP 1000

" 0 - -

POWER SUPPLY

RL1

UNDER TE ST

yI':-

vt_

~L2

DIGITAL

VOLTMETER

LOAD

RES

STORS

+ -

CURRENT

MONITOR ING

RES I STOR ...().

{ R S

Figure

9-5.

6002A Constant Current Test Setup

Performance

The 6002A is a listener-only on the HP-IB and is designed to

be a programmable power supply with a versatile voltage and

current and output range. Hence, its prime applications are

found in the testing of electronic components and in

supply-

ing stimulus to various process control equipment. Actual

performance testing would be more applicable to high speed,

low current applications (i e., ADC's used for waveform gen-

eration). If empirical measurements are desired, however,

refer to the performance programs discussed in Chapter 5 of

Application Note 401-1.

In actual applications of the 6002A, a stimulus is applied, and

a response is expected or

measured.

The time between

requesting the stimulus and the expected response is often

useful information to the system

programmer.

The 6002A will respond in less than 100 milliseconds when

programmed from 0 to 99.9% of maximum rated output

~Ol

tage. This response is independent of load. For programming

the supply down (100% to 0.1 % of maximum rated output),

the output takes approximately 400 milliseconds without any

load and approximately 200 milliseconds with a full load. The

slower time to program down is due to the supply's output

capaCitor which discharges much more slowly without a load

than with a

load.