21
MODEL 1054B C
SECTION 4.0
CONFIGURATION
4.2. ALARM 1 AND 2.
Display Mnemonic
AL1
or
AL2
.
Used to set alarm relay logic. The alarms may be
used to perform on-off process control. See note
below.
A. ON.
Display Mnemonic
On.
Select this item if Alarm
1 or 2 is to be used as a process alarm. See Steps D
through G for further configuration.
B. OFF.
Mnemonic
OFF
. Select this item if alarm 1 or 2
will not be used or to temporarily disable the alarm.
Alarm 1 or 2 setpoint will display
oFF
if this item is
selected. Omit Steps D through G.
C. Fault.
Display Mnemonic
FLt
. (Alarm 2 only). Select
to make Alarm 2 a fault alarm. Relay 2 will energize
when the unit shows a fault condition. See Table 8-1
for a listing of the fault mnemonics and their descrip-
tions. Alarm 2 setpoint will display
flt
if this item is
selected. Omit Steps D through G.
D. Alarm Logic.
Mnemonic
H-L
. Select this item for
high or low alarm logic. High logic activates the alarm
when the reading is greater than the set point value.
Low logic activates the alarm when the reading is less
than the set point value.
E. Relay Hysteresis.
Display Mnemonic
HYS
. Sets the
relay hysteresis (dead band) for deactivation after
reading has passed the alarm set point. May be set
from 0 to 25%. Use hysteresis when a specific con-
ductivity should be reached before alarm deactivation.
F. Delay Time On.
Display Mnemonic
don
. Sets time
delay for relay activation after alarm set point is
reached. May be set from 0 to 255 seconds.
G. Delay Time Off.
Display Mnemonic
doF
. Sets time
delay for relay deactivation after alarm set point is
reached. May be set from 0 to 255 seconds. Alarm
state restarts time from zero. Use when a fixed time
should pass before relay deactivation occurs.
4.2.1 Alarm Configuration (
AL1
/
AL2
).
Refer to Figure 4-1.
1.
Enter Set Mode by pressing
ACCESS
key twice.
2.
SCROLL
(
é
) until
AL1
or
AL2
appears on the dis-
play.
3.
SELECT
to move to the next menu level.
On
,
OFF
or (
AL2
only)
FLt
will display.
4.
SCROLL
(
é
) to display desired item then
SELECT
.
5.
If
OFF
is selected, display will show
oFF
to
acknowledge. Press
ENTER
key to return to
AL1
or
AL2
, concluding routine. Skip to Step 11.
If
On
is selected, display will show
on
to acknow-
ledge, then display
H-L.
Proceed to Step 6.
If
FLt
is selected, display will show
Flt
to ack-
nowledge. Press
ENTER
key to return to
AL2
.
6.
SELECT
H-L. Hi
or
Lo
will display (flashing).
7.
SCROLL
(
é
) to the desired item and ENTER it
into memory. Display will return to
H-L
. If changes
to relay activation logic are desired, proceed to
Step 8, otherwise Step 12.
8.
SCROLL
(
é
) to display
HYS
,
don
or
doF
then
SELECT
desired item. Numerical display will
flash to indicate that a value is required.
9.
Use
SCROLL
(
é
) and
SHIFT
(
ç
) to display the
desired value.
10.
ENTER
value into memory. The analyzer will
acknowledge and return to display of last item
selected. Repeat Step 8 if further changes are
desired, otherwise Step 12.
11. Repeat Step 3 for the other Alarm's settings as
required.
12. To return to the first level of the Set Mode, Press
the
ACCESS
key.
Figure 4-1.
Alarm 1 and Alarm 2 Configuration
On
OFF
On
FLt
OFF
AL1
AL2
H-L
HYS
don
doF
H i
Lo
SEt
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