
MULTIPOINT CIRCULAR-CHART RECORDER INSTALLATION AND OPERATION MANUAL
Section 2
Page 2 - 3
HA250385
Issue 2 Mar 98
2.3 ALARM INDICATION
Each of the six input channels has its own LED indicator on the display. A further alarm icon situated to the left of
the display line indicates whenever there is an active alarm. The symbols flash until the alarm is acknowledged or
are steadily illuminated if the alarms are still active but have been acknowledged.
Alarms can be acknowledged at any time by using the Alarm acknowledge key (the left-most key of the eight).
Figure 2.4 shows the operator interface with the locations of the channel alarm indicators and the operating keys.
2.4 KEY/DISPLAY FUNCTIONS
Figure 2.4 Operator interface
2.4.1 Keys
Alarm acknowledge
This key acknowledges all active, unacknowledged alarms.
Page up/down
The Page up and down keys are used
a. to move round the Operator and Configuration top level menus
b. to move round sub menus (e.g. Operator Chart submenu - section 3.3)
Cursor
The cursor key can be used in background mode to stop the normal scrolling-through of channels' values i.e. to
display a single channel's value continuously (Channel hold) until the cursor key is operated again. The 'E' LED is
illuminated while channel hold is in operation.
In operator and configuration pages, the cursor key is used to move from field to field where there is more than one
item whose value can be changed. The cursor position is shown by the selected field's flashing on and off. For
example, the Log interval page (part of chart configuration) has both hours and minutes fields (shown underlined
below) which are moved between using the cursor.
Log Int 0hrs 0mins
Log Int 0hrs 0mins
1
2
3
4
5
6
E
Enter
key
Cancel
key
Scroll down
key
Scroll up
key
Cursor
key
Page down
key
Page up
key
Alarm
acknowledge
Channel
alarm
Channel alarms
Channel alarms
Edit/Hold