BC Biomedical SA-2010 Manual do Utilizador descarregar pdf (Página 14)

Display

The main information in the system is presented in the 3-1/2 digit LCD display. This

data is provided as simple meter readings with the measurement units indicated to the

right by one of four LED indicators.

Function Selection

Nine LEDs and two keys make up the Function Selection Section. The keys are up and

down arrows. When depressed, they step the Analyzer through the available options.

The LED next to the currently selected option is illuminated.

Load Selection

The unit may either use the AAMI ES1-1993 or IEC 601 Test load for measurements.

This is selected by the Load Selection switch.

Analyzer Test Receptacle Control

There are four keys and 8 LEDs in the Analyzer Test Receptacle Control Section. They

allow the manual control of the power connections that are made to the DUT. Internally,

a series of relays are switched by the microprocessor based on the keys that are

depressed. The LEDs indicate the current state of the power connections to the

Receptacle.

Note: The Forward/Reverse Polarity key has a safety delay feature, preventing damage

to the internal relays and the DUT. When the key is depressed, the DUT power is

disabled and the safety delay is activated. When this delay is complete, the internal

relays switch the polarity to the DUT and apply power. This delay allows any reactive

power stored in the DUT to self-discharge before the polarity is reversed.

Note: The unit will power up with the Neutral and Ground Closed, in Forward Polarity

and with the Hot Open. It is recommended that the unit be returned to this condition

when plugging and unplugging the DUT.

Patient Lead Control

There are ten patient leads. During testing, it is necessary to select between these

leads, select all of them and apply High Voltage to them. This section provides the

control keys to do these test configurations and the LEDs to indicate the current state.

There is one LED and an internal relay for each lead. The LEDs and the markings

below each LED indicate when that relay is on, thus selecting the indicated lead. The

Up and Down arrow keys sequentially select each lead in order and scroll through from

None, to 1-10 to All and around again.

To apply High Voltage to the leads, the “ISO” Test key is depressed. It is only active in

the Lead Isolation mode. It is a momentary key so that High Voltage is only applied

while the key is held down.

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BC Biomedical SA-2010 Manual do Utilizador Página 14