Instruction manual

Instruction Manual
760006-A
September 2001
11-18 Appendices Rosemount Analytical Inc. A Division of Emerson Process Management
Model NGA 2000 Platform
Autocalibration modules and calibrate on
its own sequence as setup above.
NOTE
Only the start time is common to mas-
ter/slave groups. Because of the dif-
fering times taken by the Analyzer
modules over their zero and span func-
tions, the spans and the end times will
probably not occur simultaneously.
This means that in general you cannot
use a single span gas valve for multi-
ple Analyzers when using multiple sin-
gle-Autocalibration modules. Use the
system Autocalibration module in-
stead.
In the Timing parameters screen, the
following should be considered: If
Start sequence at this time - Day of
month is 0, calibration will occur every
day and If Calibration cycle period is 0,
auto cal is disabled.
Autocalibration Sequence
Setup - Zero And Span Options
1. Press the left arrow key to get back
into the Auto cal module setup
screen.
2. Select Valve control parameters...
3. Select Zero gas valve...
Edit Operation performed:; this may
be CAL or QC Check. The former
causes the Analyzer to do a zero,
whereas the latter simply flows gas
but does not cause the Analyzer to
do a zero. Normally this is left as
CAL!
The next line shows the current
status of the system.
4. Press the left arrow key, and then
select Span valve 1...
Edit the Analyzer range to be used
on this span gas.
Edit the operation to be performed:
Cal, QC check, or disables (to skip
this value).