CHAPTER 2, INSTALLATION AND OPERATION
98307600 Rev. C-1 2-21
2.5.5.1 Timed Calibration
The following screen appears when CALIBRATION: TIMED is selected.
CALIBRATION MENU
CALIBRATION : TIMED
TIMER INTERVAL : 24 HOURS
STARTING HOUR : 0
CYCLE TIME : 15 MINS
CO TIMED SPAN : 10.000 PPM
CALIBRATION : INTERNAL
SPAN COMP : ENABLED
CO SPAN RATIO : 1.0000
BACKGROUND : START
BACK. INTERVAL : 24 HOURS
CO CAL PRESURE : 760.0 TORR
Figure 2-11. Timed Calibration Menu
CALIBRATION
Designates TIMED or MANUAL calibration control.
TIMER INTERVAL
The number of hours between the zero/span checks.
STARTING HOUR
The hour when the first zero/span check will be performed.
CYCLE TIME
The period (1 to 59 minutes) of the zero & span steps during a timed calibration.
CO TIMED SPAN
Digital setting of the span concentration reading the operator expects the
instrument to read during and AZS cycle. An entry is required only if SPAN COMP
is ENABLED.
CALIBRATION
The choice of INTERNAL or EXTERNAL valves that will operate during a zero/span
check. (The EZS valve option must be installed to use EXTERNAL.)
SPAN COMP
A choice of ENABLED or DISABLED. This function automatically corrects span
readings to the expected value. See Chapter 3 for additional information.
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