Instruction Manual

HAS60E-IM-HW

June 2007

NGA 2000 CLD

Calibration Parameters

This menu provides various parameter settings for all calibration performed from Basic or Expert modes.

Main (Menu)...

Analyzer and I/O expert controls & setup...

Analyzer module setup...

Calibration parameters...

Line#1

0.000 ppm

Calibration Parameters

 

 

 

Calibration adjustment limits:

Disabled

Calibration averaging time:

9 s

Calibration failure alarm:

Yes

Cal failure error allowed:

50 %

Calibration time out:

59 s

Zero ranges:

SEPARATELY

Span ranges:

SEPARATELY

 

HOME

 

ESCAPE

 

CAL

 

NO/NOx

 

INFO

 

 

 

 

 

Figure 3-7: Calibration Parameters Display

Calibration adjustment limits:

Set to "Disable" to recover from a calibration failure.

Calibration averaging time:

Set the time used by the analyzer to average its reading during calibration. A longer time will give a better calibra- tion.

When using a system calibration, take care that averaging time is long enough for the analyzer to reach a settled reading. Otherwise, calibration may fail !

Calibration failure alarm:

When turned on ("yes"), issues a warning if the analyzer has to change its calibration by more than the Cal Failure Error, if warning alarms are enabled.

Cal failure error allowed:

The percentage by which the calibration can change before an alarm is triggered if the Calibration Failure Alarm is enabled.

Calibration time out:

Sets how long the analyzer will wait for the signal to stabilize before issuing a Warning.

Zero (Span) ranges:

Used to select wether to calibrate ranges "TOGETHER" or "SEPARATELY". If together, zeroing or spanning will go through each range one by one. If the change required is too great, it will fail and send an alarm if warning alarms are enabled. In this case, Disable Calibration Adjustment Limits and try again. First check that the calibration gases are correct. If non-zero gases are used, or the changes are great, zero and span may have to be repeated a few times.

In case that a system calibration is used, set all ranges to "SEPARATELY".

Please note that Software will accept only span gas values that are a factor of 10-110% of the measuring range. From that, it is possible, that not all of the four measuring ranges can be calibrated altogether. In that case you will have to set the option to "SEPARATELY".

In case that a calibration is not possible because the difference of display to the true value is too great, switch of the "CalCheck" option.

Emerson Process Management GmbH & Co.OHG

Operation 3 - 5