Ecotech A Series User Manual

EC9830 CO ANALYZER OPERATION MANUAL
3-14 98307600 Rev. C-1
3.4.2 AZS Outline
When used with a certified traceable CO span standard and external zero standard,
the EC9830 automatic zero/span (AZS) feature may be used to automatically carry
out a Level 1 calibration check on a periodic basis. Further, when the SPAN COMP
in the instrument is ENABLED, the EC9830 automatically and continually
compensates subsequent concentration measurements for any minor calibration
drift as follows:
UNCOMPAZSREAD
]CO[f]CO[ ×=
Equation 3-2
Where:
[CO]
READ
= the corrected instrument concentration reading
based on the span compensation ratio obtained during the
previous AZS cycle
[CO]
UNCOMP
= the instrument concentration reading without
compensation
f
AZS
= the span compensation ratio determined during the
previous AZS cycle (the default value of f
AZS
is 1.000 until the
first AZS cycle is carried out; see Equation 3-3).
UNCOMP
STD
AZS
]CO[
]CO[
f =
Equation 3-3
During an AZS cycle, the EC9830 measures the concentration of the span gas
provided to the span gas port. This measurement reading should equal the actual
concentration of the span gas standard. If it does not, the instrument sets
[CO]
READ
= [CO]
STD
and calculates a new f
AZS
as follows:
[CO ]
STD
= the certified concentration of the span gas standard at the span
gas port.
The new value of f
AZS
is then used to compensate subsequent measurement
readings until the next AZS cycle.
The zero gas reading during an AZS cycle is used for reference purposes only.
The reading is not used to compensate future values regardless of whether
COMPENSATION is ENABLED or DISABLED. The analyzer automatically runs a zero
cycle (background) at midnight using the internal zero scrubber and compensates
future readings based on this value.

Ecotech A Series Specifications

General

Brand	Ecotech
Model	A Series
Category	Measuring Instruments
Language	English