Teledyne GFC-7000E - Trace CO2 Analyzer - Manual (Page 150)

Model GFC7000E Instruction Manual Calibration Procedures
04584 Rev A1 139
7.6. Automatic Zero/Span Cal/Check (AutoCal)
The AutoCal system allows unattended periodic operation of the ZERO/SPAN valve options by
using the MGFC7000E’s internal time of day clock. AutoCal operates by executing SEQUENCES
programmed by the user to initiate the various calibration modes of the analyzer and open and
close valves appropriately. It is possible to program and run up to 3 separate sequences (SEQ1,
SEQ2 and SEQ3). Each sequence can operate in one of 3 Modes, or be disabled.
Table 7-1: AUTOCAL Modes
MODE NAME ACTION
DISABLED Disables the Sequence
ZERO Causes the Sequence to perform a zero calibration/check
ZERO-SPAN Causes the Sequence to perform a zero and span
concentration calibration/check
SPAN Causes the Sequence to perform a span concentration
calibration/check
For each mode there are seven parameters that control operational details of the SEQUENCE.
They are:
Table 7-2: AutoCal ATTRIBUTE Setup Parameters
ATTRIBUTE NAME ACTION
TIMER ENABLED Turns on the Sequence timer
STARTING DATE Sequence will operate after Starting Date
STARTING TIME Time of day sequence will run
DELTA DAYS Number of days to skip between each Seq. execution
DELTA TIME Number of hours later each “Delta Days” Seq is to be run
DURATION Number of minutes the sequence operates
CALIBRATE Enable to do a calibration – Disable to do a cal check only