Rosemount 1054B - 4.2 Alarm 1 and 2 Configuration

23
MODEL 1054B pH/ORP 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
configured 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
thru G for further alarm configuration.
B. Off. Display Mnemonic OFF. Select this item if Alarm
1 or 2 will not be used as a process alarm or to tem-
porarily disable either alarm. Alarm 1 or 2 setpoint will
display oFF if this item is selected. Omit Steps C thru
G.
C. Fault (Alarm 2 Only). Display Mnemonic FLt.
Select to make Alarm 2 energized when the analyzer
detects a fault condition. See Table 8-1 for a listing of
the fault mnemonics and their descriptions. Alarm 2
setpoint will display FLt if this item is selected. Omit
Steps D thru G.
D. Alarm Logic. Display 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 setpoint value.
E. Relay Hysteresis. Display Mnemonic HYS. Sets the
relay hysteresis (dead band) for deactivation after
reading has passed the alarm setpoint. May be set
from 0 to 2.0 pH. Use hysteresis when a specific pH
should be reached before alarm deactivation.
F. Delay Time On. Display Mnemonic don. Sets time
delay for relay activation after alarm setpoint 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 setpoint 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 Setup (AL1/AL2).
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
acknowledge. 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. The Numeric 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. 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.