MICROTSCM (07/09)
Page 11
REV 2.4
5.0 Operation
The SCM system consists of three major components, The Sensor, the Sample Chamber
and the Analyzer.
5.1 The Sensor/Sample Chamber
The sensor module sits on top of the sample chamber, with the probe end below the water
level. The sample chamber has three valves to adjust the flow:
•
The inlet should be adjusted such that there is always a sample present. A lack of
a sample will cause premature wear in the cell and piston.
•
The main drain needs to be adjusted open as much as possible to allow the larger
particulates to drain while the sample water is measured.
•
The overflow valve is usually connected to the main drain and is left fully open.
Its purpose is to keep the sample chamber from overflowing.
To prevent back flow and allow proper draining it is important that both drains are left
open to the atmosphere and kept at short as possible.
If heavy particulates can be present in the water it is important to install a 40 mesh strainer
before the inlet. The flow should also be kept low to allow large sand and larger debris to
fall to the bottom of the sample chamber and drain, without causing harm to the sensor.
The sample chamber has a cover to reduce algae growth. This cover may be easily
removed for service.
5.2 The Analyzer
Detail is not provided on individual menus as most are self explanatory. Notes are used,
where needed to bring attention to important information.
There are a few analyzer keys which have special purposes as described below.
This key resets the alarms after an alarm condition has been met. A screen
display of the alarm will continue until the alarm condition is relieved.
Alarms will also reset themselves without intervention if instrument
reading returns to a non- the alarm condition.
The Enter/Menu key is used to either invoke the Main Menu while in the
graphing screen or to return to the previous menu.
These two buttons are used to modify values or to scroll through possible
selections.
