GE Hydran 201i, Инструкция по эксплуатации

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Chapter 4 • Hydran 201T
i
’s Displays and Menus
4-4 Rev. 6, March 2011 Part 17997
The unacknowledged alarm messages are always displayed in priority. When an alarm
occurs, the Main Display mode is immediately replaced by the Unacknowledged Alarms
mode. If two or more unacknowledged alarms are present, the display scrolls through their
messages at the rate of one every five seconds.
The user acknowledges each alarm by pressing the ENTER key for each alarm message.
The flashing messages are then removed from the list one at a time. The H201T i returns to
the Main Display mode when the user has acknowledged all alarms. Acknowledged alarms
that are still active are shown as non-flashing messages in the Main Display list (see
Section 4.2.2 on page 4-4). When an alarm condition disappears, this message is removed
from the Main Display list.
Almost all alarm messages are displayed as follows, whether the alarm is unacknowledged
(flashing) or not (alarm condition still present):
• The top line displays the alarm message (the name of the parameter that triggered the
alarm) followed by the alarm state: LL (Low-Low), L (Low), H (High) or HH
(High-High).
• The bottom line displays the parameter’s alarm set point (not the measured value). The
LL, L, H and HH alarm set points can all be adjusted and turned off.
In this first example, the actual display is on the left and the comments are on the right:
4.2.2 Main Display Mode
When the H201T i is operating properly (no unacknowledged alarms, keypad unused), the
messages shown in Table 4-1 on page 4-5 are displayed at the rate of one every five
seconds.
Note: The display shows the alarm setting that was exceeded, NOT the actual value of the
variable in alarm.
Gas HH Gas High-High alarm
300 PPM
Gas level above 300 ppm