Programming The Sampler For Level Control; Storm Water Programming - Hach Sigma 900 User Manual

Section 5

5.11 Programming the Sampler for Level Control

Item
Message
Number
1 LEVEL CONTROL
2 STORM MODE?
3 LEVEL START?
4 LEVEL START/STOP
5 SAMPLE ON LEVEL?

5.12 Storm Water Programming

Page 44
Programming the Sampler for Level Control
predetermined level, a sample is taken within the first minute and the interval
automatically resets to the programmed time or flow interval.
Mode 3
When the liquid rises to a predetermined level, a sample is not taken
immediately. A sample is taken only when liquid is at or above the
predetermined level and after the programmed sample interval has elapsed.
The interval between samples counts down and resets even when the liquid
level is below the predetermined (actuation) level. This mode is used to
synchronize sample collection with a real-time clock when sampling in the
time mode.
Put the sampler in a standby state (i.e.
or
PROGRAM COMPLETE
will cause the display to read
may be displayed in the level control program:
If you press ,
NO SPECIAL OUTPUT?
feature is explained on page
If you press , the sampler functions in Storm mode. Storm mode programming is
YES
described in section 5.12. If you press
If you press , the sampler operates as described in Mode 1. If you press
YES
display shows item number 4.
If you press the sampler operates as described in Mode 2. If you press
YES,
display shows item number 5.
If you press the sampler operates as described in Mode 3. If you press
YES,
display shows item number 1.
EPA regulations for storm water discharges require monitoring of
precipitation, flow and water samples in order to assess the impact of storm or
snow melt runoff on receiving waters. The manufacturer can help to create a
storm water monitoring system that consists of a multiple bottle sampler, an
external flow meter, and a tipping bucket rain gauge.
In addition to performing basic sampling routines, Sigma 900 All Weather
Refrigerated Samplers that are equipped with the storm water monitoring
program have the following additional capabilities.
• The storm water sampling routine allows collection of automatic grab
sample(s) at user-selectable timed intervals (up to 24 different intervals
may be selected) during the storm's early stage or "first flush". First flush
grab and main program flow weighted composite samples are
automatically segregated. The first flush sample volume may be set
independently of the sample volume for the flow weighted composite.
• The special storm water program allows an external device to initiate the
start of the sampling program. A dry contact closure across Pins B and D
on the Auxiliary receptacle, held closed for at least 61 seconds, is
required.
PROGRAM HALTED
) hold the key for two seconds. This
CLEAR ENTRY
. The following messages
LEVEL CONTROL?
Description of Message
will appear on the display. The Special Output
46. If you press , the display shows item 2.
YES
, the display shows item 3.
NO
,
READY TO START
, the
NO
, the
NO
, the
NO
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