STORM
™
- SETTLING RATE MONITOR
INSTALLATION, OPERATION & MAINTENANCE MANUAL
ESTDS-STORM-IOM - REV K
Page 13 of 31
6.4
Sampling Sequence Configuration Screen
The Sequence Configuration screen is the third configuration screen and is accessed from the
Coag Control Config Screen.
Control Functions
The operator is able to modify the sample sequence timing.
Step 10
‘
DILTUTION TIME (s)
’
is the duration of a short spray of water at the start of the
sample. This can be used to dilute the sample where turbidity is excessively high. [Default
time is 0 seconds].
Step 15
‘
FAIL TO FILL TIME (s)
’
is the time allowed for the sample to be drawn up into the
Settling Cylinder. If the time expires before the sample level reaches the level probe, then an
alarm message is displayed; and the sequence restarts. [Default time is 60 seconds].
Step 30
‘
MINIMUM SETTLING TIME
’
is used to prevent the sample returning a false early
settling time. A false reading can occur if the turbidity probe is slow to react to the new
sample’s turbidity. [Default
time is 5 seconds].
Step 40
‘
M
INIMUM WAIT FOR FINAL’
is the minimum time (after the sample settling time is
sensed) to wait before measuring final turbidity. [Default time is 10 seconds].
Step 60
‘
DUMP TIME (s)
’
is the time allowed for draining (under gravity), prior to flushing and
purge. [Default time is 2 seconds].
Step 70
‘
FLUSH TIME (s)
’
is the duration of the water flush at the end of the sample stage.
[Default time is 2 seconds].
Step 80
‘
PURGE TIME (s)
’
is the duration of the air purge which forces the sample out of the
Settling Cylinder and sample hose at the end of the sample sequence. [Default time is 2
seconds].
Step 90
‘
DELAY TIME (s)
’
can be used to reduce the number of sample cycles per hour, by
introducing a dormant period at the end of each sample. [Default time is 1 seconds].
