4 Operation
Model 2010A
4-16 Part I
Teledyne Analytical Instruments
units, as necessary. When you have set the concentration of the span gas you are
using, press
Enter
to begin the Span calibration.
Press
Enter
to enter the span value into the system and begin the span
calibration.
Once the span has begun, the microprocessor samples the output at a
predetermined rate. It calculates the difference between successive samplings
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. It is a sensitive indicator of stability.
####.##% H2 — N2
Slope=#.### Span
When the
Span
value displayed on the screen is sufficiently stable, press
Enter
. (Generally, when the
Span
reading changes by 1 % or less of the range
being calibrated for a period of ten minutes it is sufficiently stable.) Once
Enter
is pressed, the
Span
reading changes to the correct value. The instrument then
automatically
enters the
Analyze
function.
4.5
The Alarms Function
The Model 2010A is equipped with 6 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 3,
Installation
and/or the Interconnection Diagram included at the
back of this manual for relay terminal connections.
The system failure alarm has a fixed configuration described in chapter 3
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
non-latching
, and either
failsafe
or
non-failsafe
, or, they can be
defeated
altogether. The setpoints for the alarms are also established using this function.
Decide how your alarms should be configured. The choice will depend
upon your process. Consider the following four points:
1. Which if any of the alarms are to be high alarms and which if any
are to be low alarms?
Setting an alarm as HIGH triggers the alarm when the
contaminant concentration rises above the setpoint. Setting an
alarm as LOW triggers the alarm when the contaminant
concentration falls below the setpoint.
Decide whether you want the alarms to be set as:
Summary of Contents for 2010A
Page 16: ...Teledyne Analytical Instruments 1 Part 1 Introduction Model 2010A ...
Page 22: ...2 6 Part I 2 Operational Theory Model 2010A Teledyne Analytical Instruments ...
Page 34: ...Teledyne Analytical Instruments 3 Installation Model 2010A 3 12 Part I ...
Page 70: ...5 Maintenance Model 2010A 5 6 Part I Teledyne Analytical Instruments ...
Page 86: ...1 4 Part II Teledyne Analytical Instruments 1 Introduction Model 2010A ...
Page 104: ...4 Maintenance Model 2010A 4 8 Part II Teledyne Analytical Instruments ...