Hach 900 MAX Instrument Manual page 43

Flow Proportional Constant Volume, Variable Time (CVVT)
8990startup.fm
b. Enter the Interval Between Samples. Press
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ACCEPT
INTERVAL:
CANCEL
ENTER: 000:01—999.00 (hrs:min)
c. Select either Take First Sample Immediately or After The
First Interval?
Note: When the program is started, the first sample is taken immediately upon
pressing the start button or after the first interval has elapsed.
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ACCEPT
TAKE FIRST SAMPLE:
CANCEL
CHOICES: IMMEDIATE, AFTER 1
d. Press to continue to Sample Distribution.
ACCEPT
CVVT sampling is a flow-proportional method of sampling. CVVT samples are
taken when a user-defined flow volume occurs in the flow stream. This occurs
when the sampler is programmed to take a sample every time a specified
volume of flow occurs in the flow stream. Specified flow volume intervals can
vary with the flow rate of the stream, therefore varied time intervals can occur
when constant (fixed) volume occurs.
Flow volume is determined internally, by the optional integral flow meter or by
an external flow meter.
a. Press
CHANGE CHOICE
.
ACCEPT
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ACCEPT
SAMPLE COLLECTION:
FLOW-PROPORTIONAL
CANCEL
ENTER: 1.00 - 99999999
b. In the Flow Proportional menu, press
Volume, Variable Time is displayed. Press
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ACCEPT
FLOW PACING MODE:
CONST VOL / VAR TIME
CANCEL
CHOICES: VAR T / CST VOL, CST T / VAR VOL
ACCEPT
00:00 (hrs:min)
_______________
st
SAMPLE
until Flow Proportional is displayed. Press
CHANGE CHOICE
ACCEPT
Basic Programming Setup
Section 3
to continue.
SAMPLE COLLECTION
CLEAR
ENTRY
SAMPLE COLLECTION
CHANGE
CHOICE
SAMPLE COLLECTION
CHANGE
UNITS
until Constant
.
FLOW PACING
CHANGE
CHOICE
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