Hach 900 MAX - Manual (Page 43)

Section 3
Page 41
8990startup.fm Basic Programming Setup
b. Enter the Interval Between Samples. Press ACCEPT to continue.
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.
d. Press ACCEPT to continue to Sample Distribution.
Flow Proportional Constant Volume, Variable Time (CVVT)
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 until Flow Proportional is displayed. Press
ACCEPT .
b. In the Flow Proportional menu, press CHANGE CHOICE until Constant
Volume, Variable Time is displayed. Press ACCEPT .
11:00 AM 21 - APR - 01 SAMPLE COLLECTION
ACCEPT
INTERVAL:
CANCEL
00:00 (hrs:min) CLEAR
ENTRY
ENTER: 000:01—999.00 (hrs:min)
11:00 AM 21 - APR - 01 SAMPLE COLLECTION
ACCEPT
TAKE FIRST SAMPLE:
CHANGE
CHOICE
_______________
CANCEL
CHOICES: IMMEDIATE, AFTER 1 st SAMPLE
11:00 AM 21 - APR - 01 SAMPLE COLLECTION
ACCEPT
CHANGE
UNITS
SAMPLE COLLECTION:
CANCEL
FLOW-PROPORTIONAL
ENTER: 1.00 - 99999999
11:00 AM 21 - APR - 01 FLOW PACING
ACCEPT
CHANGE
CHOICE
FLOW PACING MODE:
CANCEL
CONST VOL / VAR TIME
CHOICES: VAR T / CST VOL, CST T / VAR VOL