Cloud-electronics VTX-WM1 Manual do Utilizador descarregar pdf (Página 12)

VTX-WM1 Installation Guide v1.212

Event Log and log conguration

A log is maintained for the amplier. The

log records power-on and power-off, over-

temperature, impedance test pass/fail and email

alert failures, all against the on-board clock/

calendar. The Event logging pane on the Site

Conguration page lets you dene which of

these events are to be recorded and whether

any (or all) of them should generate email

alerts.

For each of the six event types, one of the

following options may be set:

• None – events of this type are ignored

• Log only – events of this type are

recorded in the log

• Log & email – events are recorded in

the log and also entered in an alert email,

but the email is not sent at this time.

• Email Trigger – events are recorded

in the log, and the alert email is sent; this

will contain the current event and any

events recorded via the Log & email

option above.

The Event log for the amplier may be

inspected by clicking on the amplier’s button

(opens the Amplier Properties page),

and then clicking on Event Log below the

button.

Impedance Tests

The VTX-WM1 card includes a variable

frequency test oscillator which may be

programmed to apply a test tone (at 40 dB

below the amplier’s maximum output level) to

the amplier output at a future date and time,

and, if desired, at regular intervals thereafter.

(It is recommended that tests are scheduled

for the hours of building non-occupation).

The amplier output voltage and current are

monitored during the test and hence the load

impedance checked. This gives the engineer

a rst-line conrmation that all the speakers

connected to each amplier channel are

present, connected and functional.

Clicking Tests (click the amplier button

rst) opens the Test List page for the

amplier:

In order for the impedance tests to be

meaningful, an initial Load Conguration

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