Interval Timer; Interval Timer Example - Emerson Rosemount 1054B Instruction Manual

MODEL 1054B pH/ORP
4.3 INTERVAL TIMER. Display Mnemonic Int. This
item is used to set the interval timer's relay logic. The
timer can be used for sensor maintenance, such as
wash cycle or ultrasonic cleaner activation. Refer to
Figure 4-3.
A. Interval Timer Enable/Disable. Display
Mnemonic tOn. Select this item to begin interval cycle
on or disable interval cycle oFF.
B. Interval Period. Display Mnemonic int. Select this
item to set the time period between control cycles. SEC
for seconds, uin for minutes, hr for hours, and dAY for
days. May be set from a minimum of 10 minutes.
C. Relay Activations Per Cycle. Display Mnemonic
cnt. Select this item to enter the number of times the
relay will activate per cycle. May be set from 1 to 60.
D. Relay Activation Duration. Display Mnemonic
ont. Select this item to enter the relay activation time
for each cnt. May be set from 0 to 299 seconds.
E. Relay Deactivation Duration. Display Mnemonic
OFt. Select this item to enter the relay deactivation
time between each cnt during the control cycle. Valid
when cnt is 2 or greater. May be set from 0 to 299
seconds.
F. Wait Duration. Display Mnemonic dur. Select this
option to enter the electrode recovery time after the
last cnt in a cycle. May be set from 0 to 299 seconds.
The duration can be used for electrode recovery after
a wash cycle.
G. Interval Time Remaining. Display Mnemonic tiL.
Select this item to display the time remaining until the
next control cycle. If selected during the control cycle,
the display will show ---.
NOTE
The Model 1054B pH is placed on hold
during the control cycle (from first relay
activation through the wait duration).
The analyzer will simulate a fault condi-
tion and briefly show itr every eight
seconds. The display will continue to
show the measured value.
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4.3.1 Interval Timer Set Up (Int).
1. Enter Set Mode by pressing ACCESS key twice.
2. SCROLL ( é ) until Int appears on the display.
3. SELECT to move to the next menu level. tOn will
display.
4. SCROLL ( é ) to display on or oFF and ENTER it
into memory. If interval configuration is required,
proceed to Step 5, otherwise Step 10.
5. SCROLL ( é ) to display desired menu item. If int
is selected, proceed to Step 6, otherwise Step
10.
6. SCROLL ( é ) to display desired interval period
and SELECT. The Numeric Display will flash.
7. SCROLL ( é ) and SHIFT (ç ) to display the
desired value and ENTER it into memory. Display
will return to interval period menu.
8. Repeat Steps 6 and 7 as needed.
9. Press the ENTER key to return to the main timer
menu.
10. SELECT the desired item. The Numeric Display
will flash.
11. SCROLL ( é ) and SHIFT (ç ) to display the
desired value and ENTER it into memory.
12. Repeat Steps 5, 10, and 11 as required.
13. Press the ENTER key to return to the Set Menu.
RELAY
ACTIVATION
int
One Wash Cycle
FIGURE 4-3. Interval Timer Example
SECTION 4.0
CONFIGURATION
cnt = 1
0Ft = 0
ont
dur
TIME