Ecotech A Series User Manual

EC9830 CO ANALYZER OPERATION MANUAL
2-38 98307600 Rev. C-1
2.6.1 Offset and Live Zero
At any selected output range, the operator may want to observe negative signal
indications. Moving the zero indication up the scale to a specific point creates a
live zero, thus allowing the recorder or DAS to show negative as well as positive
indications.
The adjustment used to create a live zero is OFFSET. For example, a 10% offset
moves the zero indication to the point where 10% would normally be indicated.
The full reading available on the recorder paper or DAS would then be -10% to
+90% of full scale. See Figure 2-29, an illustration of offset on the strip chart
recorder.
Figure 2-29. Strip Charts Illustrating Offset
Signal adjustments for zero and instrument gain to align the output with the user’s
recorder or other measurement device can be made in the ANALOG OUTPUT MENU
in the fields FULL SCALE and ZERO ADJ. These adjustments may be necessary due
to tolerance buildup, power supply variation, etc in either the analyzer or the
measurement device.

Ecotech A Series Specifications

General

Brand	Ecotech
Model	A Series
Category	Measuring Instruments
Language	English