19
ACTIVE SUBMENU:
Press
d
11)
Display flashes previous selection. Press
b
to scroll through
the available selections:
ABoV
Above,
BELo
Below,
HI.Lo
HI/Low and
BAND
Band. (Band is active if
_DEV
Deviation was
selected).
Press
d
12)
Display shows
STRD
stored message momentarily (only if it
was changed) and then advances to
A.P.oN
.
Above
: In Absolute Mode, Alarm 1 is triggered when the process variable is
greater than the Alarm Hi Value (Low value ignored). In Deviation Mode, Alarm 1 is
triggered at the Setpoint plus any offset placed in the Alarm Hi value.
Below:
In Absolute Mode, Alarm 1 is triggered when the process variable is less
than the Alarm Low Value (Hi value ignored). In Deviation Mode, Alarm 1 is
triggered at the Setpoint plus any offset placed in the Alarm Low value.
Hi/Low:
In Absolute Mode, Alarm 1 is triggered when the process variable is less
than the Alarm Low Value or above the Hi Value. In Deviation Mode, Alarm 1 is
triggered when the process variable is less than the Setpoint minus any offset in
the Alarm Low or greater than the Setpoint plus any offset in the Alarm Hi value.
Band:
Alarm 1 is triggered when the process variable is above or below the
"band" set around Setpoint 1. Band equals Hi Value (Low Value ignored). A
"band" is set around the Setpoint by the instrument only in the "Deviation" Mode.
The Band for the AL 1 would be following the Setpoint 1 value
The Band for the AL 2 would be following the Setpoint 2 value.
The Band or the Deviation Value should be entered under:
AL1 High (if they want Alarm 1)
AL2 High (if they want Alarm 2)
AL Low value is ignored in the Band mode.
Example
: if customer requires a Deviation Value of ±10 degrees around a
setpoint (using Output 2 as alarm)
Alarm 2: - Deviation
Contact Closure type: Deviation---Band
AL2 High: 10 (Band they want around Setpoint 2)
Then the Band Value is to be entered under AL2 HI: 10 not 80+10 = 90
