Specifications

Instruction 0024-9460
21
Fyrite
®
INSIGHT
3.5.16 Auto/Manual Zero Feature
Manual Zero: When the CO channel is set to
manual zero, the analyzer does not zero the CO
sensor to ambient conditions during start up. In
this mode, the “fresh air zero” established during
manual mode setup is stored in memory and used
during the measurement of CO.
Auto Zero: When the CO channel is set to auto
zero, the CO sensor is zeroed to the ambient CO
level during start up.
IMPORTANT: When using this mode, the analyzer must be
turned ON in fresh air; otherwise, incorrect CO readings will
occur.
Auto Zero determines the zero reading of the CO channel in fresh air and
provides an offset for the CO measurements. Manual zero is used to detect
CO that may be present during start-up. The auto/manual zeroing option
allows the operator to select the start-up mode. It is selectable from the
CO Zero Setting of the Setup Menu.
1. FromtheSETUPMENU,usethe▲▼buttonstohighlightCOZero
Setting, and then press ENT to display the CO ZERO SETTING
MENU.
2. Usethe▲▼buttonstohighlightthedesiredoption(ManualorAuto
Zero), and press ENT to save the selection and re-display the SETUP
MENU.
Both methods take the user through a 60-second count down to establish
a new zero. The manual mode establishes a fresh air zero and stores it for
use during instrument startup.