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MODEL 1054B C
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.
) until AL1 or AL2 appears on the dis-
2.
SCROLL (
é
play.
3.
SELECT to move to the next menu level. On, OFF
or (AL2 only) FLt will display.
4.
SCROLL (
) to display desired item then
é
SELECT.
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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 (
) to the desired item and ENTER it
é
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 (
) to display HYS, don or doF then
é
SELECT desired item. Numerical display will
flash to indicate that a value is required.
9.
Use SCROLL (
) and SHIFT (
é
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
SEt
On
OFF
AL1
On
AL2
FLt
OFF
SECTION 4.0
CONFIGURATION
) to display the
ç
H-L
H i
HYS
Lo
don
doF
21
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