Section 4
Page 4 - 24
MODEL 346 INSTALLATION AND OPERATION MANUAL
HA243821
Issue 5 Mar 98
4.10 ALARM CONFIGURATION (Cont.)
4.10.6 DEADBAND
The following display appears only if ‘deadband’ alarm type, has been previously selected.
AXY Deadband
X.XXXX ?????
The up/down/side arrow keys are used to enter a deadband value. This value represents the size of the band
(both above and below the setpoint), within which the alarm is not active. For example if the setpoint is 80 units
and the dead band is 5 units, then so long as the measured value lies between 75 and 85 units, the alarm will not
be active.
4.10.7 ALARM MESSAGE PRINT ENABLE
AXY Alrm Print
On / Off
The up/down/ arrow keys are used to select alarm print message on or off. The printed message consists of the
time and date of occurrence, the relevant channel and alarm number, the alarm on/off status and the user-
entered alarm message (if any).
4.10.8 RATE BASE
The following display appears only if ‘rate -of-change’ alarm type, has been previously selected.
AXY Rate base
/Hour
The up/down arrow keys are used to enter a period value of /Hour, /Min or /Sec. The selection determines the
period over which the rate-of-change ‘setpoint’ is to be measured.
4.10.9 ALARM MESSAGE
AXY Message
Valve overheat
The up/down/side arrow keys are used to enter an alarm message of up to 16 characters for printing when the
alarm becomes active or resets. If alarm printing is enabled (see above), this message is printed on the chart
along with the time and date of occurrence, the channel and alarm numbers, and the alarm on/off status.
Refer to section 4.4 for text entry details.