3 Operation | Model 6600 | |
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Use the UP/DOWN switch to toggle between AUTO and MAN span settling. Stop when MAN appears, blinking, on the display. Enter to move to the next screen.
Span Val: 100 ppm <ENT> To begin span
The unit field should be blinking first (%/ppm). Use the UP/DOWN switch to set the proper unit of the span fluid and enter. Then, use the UP/DOWN switch to set the concentration.
When you have set the concentration of the span fluid you are using, Enter tobegin the Spancalibration.
Once the span has begun, the microprocessor samples the output at a predeterminedrate.Itcalculatesthedifferencebetweensuccessivesamplings and displays this difference as Slope on the screen. It takes several seconds for the first Slope value to display. Slope indicates rate of change of the Span reading.Itisasensitiveindicatorofstability.
####.## ppm | OIL |
Slope=#.### | Span |
When the Spanvalue displayed on the screen is sufficiently stable, Enter. (Generally, when the Spanreading changes by 1 % or less of the range being calibrated for a period of 30 seconds it is sufficiently stable.) Once the span ends,thecalibrationisstoredinmemory.Theinstrumentthenautomatically enters the Analyze function.
3.5The Alarms Function
The Model 6600 is equipped with 2 fully adjustable set points concentra- tion with two alarms and a system failure alarm relay. Each alarm relay has a set of form “C" contacts rated for 3 amperes resistive load at 250 V ac. See Figure in Chapter 2, Installation and/or the Interconnection Diagram included at the backofthismanualforrelayterminalconnections.
Thesystemfailurealarmhasafixedconfigurationdescribedinchapter2 Installation.
The concentration alarms can be configured from the front panel as either high or low alarms by the operator. The alarm modes can be set as latching or
Decide how your alarms should be configured. The choice will depend uponyourprocess.Considerthefollowingfourpoints:
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