Vaisala DRYCAP DMT340 SERIES Guia do Utilizador descarregar pdf (Página 78)

USER'S GUIDE____________________________________________________________________

78 __________________________________________________________________ M210704EN-E

Display Alarms

The Display Alarm feature provides two independently configurable

alarms for transmitters with the display/keypad option. Each alarm tracks

a selected quantity, with a freely configurable low and high limit. Each

alarm also has a configurable hysteresis value to prevent unnecessary

triggering when the measurement fluctuates around an alarm limit. The

alarms can be configured for any quantity supported by the transmitter.

The configuration of the Display Alarms can only be done using the

display/keypad option.

An alarm is activated when the selected quantity goes higher than the

high limit, or lower than the low limit, much in the same way as the

relays. When an alarm is activated, an alarm note is displayed on the

display, and the lights of the display will blink.

0802-041

Figure 51 Display Alarm Active

Multiple alarms can be active at the same time; the alarm that was

triggered first will be shown on the display. The next active alarm is

revealed when the currently shown alarm is acknowledged by pressing

the OK button.

Note that activated alarms are only shown on the screen. There are no

alarm messages output to the serial line, or markers placed in the graph

data. After an alarm has been acknowledged, you must refer to the data

graphs to see when the measured quantities have exceeded the limits.

Configuring a Display Alarm

1. Enter the Main Menu by pressing an arrow key on the keypad.

2. Use the arrow keys to select Display, followed by Alarms, to open

the Display Alarms menu. The Display Alarms menu shows the

currently enabled and disabled alarms.

1 2 ... 73 74 75 76 77 78 79 80 81 82 83 ... 168 169

Sem comentários

Vaisala DRYCAP DMT340 SERIES Guia do Utilizador Página 78