California Instruments 1251RP Series Instrukcja Użytkownika Pobierz pdf (Strona 2)

PC Bus Data Acquisition

A high speed digital signal processor

based data acquisition system is used

to implement the required IEC compli-

ance measurement system. Direct ac-

cess to the PC bus ensures a much

higher data throughput capability than

typically found in single box IEC test

systems that use the IEEE-488 instru-

mentation bus to communicate with the

PC.

A special signal conditioning and iso-

lation unit is used to provide quick and

easy connection between the AC

source output and the Equipment Un-

der Test. This unit provides the re-

quired isolation, signal conditioning and

anti-alias filtering for the measurement

system. The equipment under test can

be plugged in the front panel mounted

European style outlet, or wired to a rear

panel mounted terminal block. An op-

tional international socket strip with

multiple country specific outlets is avail-

able.

Harmonics Analyzer

A key part of the CTS system is the

IEC compliant power analyzer which

provides detailed information on both

voltage and current harmonics. Mea-

surements are made in real-time with

no measurement gaps to fully conform

to IEC 61000-3-2 transitory harmonics

test requirements. AC source voltage

and EUT power are monitored continu-

ously during the entire test. Voltage dis-

tortion and current har-

monic data is checked

against IEC class limits

for pass or fail detec-

tion. Comprehensive

test reports can be gen-

erated easily. Continu-

ous measurement of

the EUT power con-

sumption allows class

C and D test limits to be

calculated dynamically.

Test limits are retained

in a password protected

database and can be

updated if needed in the

future without the need

to change software. Other software

changes as a result of changing IEC

harmonics standard can be accom-

plished by simply downloading new PC

software. No harmonics testing soft-

ware resides in system firmware which

would require more costly upgrades.

Source Control

The IEC GUI software controls the AC

power source using the IEEE-488 or

RS232C interface. Settings for nomi-

nal voltage and frequency are auto-

matically applied and possible overload

conditions are detected and reported

to the operator. IEC 61000-4 AC im-

munity tests run completely under soft-

ware control.

Flicker Meter and Im-

pedance

An IEC 868 compliant flicker meter is

provided with the CTS software. The

required IEC 725 compliant reference

impedance is implemented in the iX

Series AC Source using programmable

output impedance. Programmable im-

pedance offers improved accuracy

compared to a lumped reference im-

pedance and the ability to support dif-

ferent national standards without the

need to switch out lumped reference

impedance hardware. A good example

is testing for compliance with the Japa-

nese harmonics and flicker standard,

which requires different impedance

values to be programmed from the

European test standard.

Optionally, a lumped impedance com-

pliant with IEC 725 can be ordered for

both single and three phase iX Series

based CTS systems. The GUI soft-

ware can be configured to use either

impedance type during flicker testing.

The three phase lumped impedance

option (-LR3) for the 15003iX-CTS sys-

tem is shown here. The 30003iX-CTS

system does not support program-

mable impedance and requires option

-LR4 for flicker testing.

The RP-Series based CTS systems

use a lumped impedance integrated in

the PACS-1RP and PACS-1RP2.

CTS Series - System Components

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