Emerson I-0021 Manual Do Utilizador

90003482(2) [NGA-e (MLT-Software 3.2.X)] 07/98

NGA 2000

♦ 

Select the parameter you want in the menu "Alarms Setup", i.e. "Concentration",
and change to the corresponding menu:
Note: If the setup of the parameter selected is not possible, a corresponding message
will appear on the screen, i.e. no flow sensor installed to measure the flow.

1) Switch off the alarm control:

• 

Before beginning the alarm parameter setup, you have to select "Off" in the line
"Alarm generation is".

• 

Otherwise, an alarm may start during the parameter will be configured.

2) Signal limits setup for alarm ("Level -1, ... , -4"):

• 

You can adjust four limit values for each signal parameter.

• 

You should fix the low alarm with "Level -2" and the high alarm with "Level -3". Then,
you should save the low alarm with "Level -1" and the high alarm with "Level -4".

• 

The units and the possible range of values depend on the signal parameter selected.

• 

You also can adjust negative values:
Select the number with the 

88 

 -key or the 

→

→

 -key and press F4 (+/-) to change the sign.

3) Conditions for alarm start ("Alarm-1, ... , -4 if signal is"):

• 

In these lines you can determine for which kind of exceeding each alarm shall be
generated:

• 

Less: The alarm message will appear, if the value of the parameter selected is below
the corresponding limit ("Level -1, ..., -4").

• 

Greater: The alarm message will appear, if the value of the parameter selected is
above the corresponding limit.

4) Switch on the alarm control:

• 

Select one of the following set-ups to start the alarm control for the parameter limits
selected:

Measure

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TAG

95.00 ppm

-- Concentration Alarm Setup --

Alarm generation is:

Off

Level -2:

0.000  ppm

Level -3:

100.000  ppm

Level -4:

1000.000  ppm

Alarm-1 if signal is:

Less

Alarm-2 if signal is:

Less

Alarm-4 if signal is:

Greater

Level -1:

-10.000  ppm

Alarm-3 if signal is:

Greater

Channel