Specifications

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3BUS 208 000 R1301 135Measurement Setup
Standardize Delay After Long Off-Sheet Periods
There is a "delayed standardize feature" which allows the system to delay a DIRTY
standardize request until the head has scanned for a specified amount of time, after
the head has been off-sheet for a specified amount of time. This feature is desired
where a lot of dust is present in the air and this dust settles on the GT Caliper probes
while off-sheet for an extended time. In that case, the head is desired to scan (to
rub the dust off the probes) before doing a standardize. This delayed standardize
feature is also desirable for all the other sensors in that it assures a correct standardize
after the sensors have been reconditioned to the sheet after long idle periods. Not
allowing the sensors to recondition before standardizing can cause measurement
inaccuracies if the head has been off-sheet long enough to cool. During this time
delay, the measurements will be valid provided there was an initial good standardize.
There are four instance variables associated with this feature. Two are setup
variables accessible on the Frame HealthReport, offSheetTime and onSheetTime,
while the other two, stdzRequested and stdzDelayRequired, both located in the
scanner01 object, are status flags used to identify the current status of any
standardize delay. The stdzDelayRequired will indicate a 1 if the off-sheet position
has been active for more than the offSheetTime. The stdzRequested instance variable
will indicate if a new request from the host or Health Reports has been received
after the onSheetTime has expired. A value of 0, the current default value for
offSheetTime and onSheetTime, will turn off the feature. The recommended starting
value for the off-sheet timer should be 10 minutes (600 seconds), and for the on-
sheet timer, 6 minutes (360 seconds). Experiment to determine the most appropriate
off and on sheet delay times for each site. This feature is bypassed when a local
standardize is requested from the FCP or if a CLEAN standardize has been requested
from the host or Health Reports.
Reporting of "Internal" Check Sample During Standardize
Several sensors have an internal check sample which is monitored at a CLEAN
standardize request. The internal check sample can be also monitored at selected
DIRTY standardize intervals. The sensors involved are Smart Basis Weight, Smart
Ash, GT Caliper, Color, and IR Coat Weight. There is an instance variable called
NAUTO for each of these sensors. If it is set to 0, no internal check sample will
take place during a DIRTY standardize request. If it is a positive number, then the
number will define the standardize interval between internal check samples done
at DIRTY standardizes. If the number is set to a negative value, then the internal
check sample will place it at the beginning and again at the end of the standardize
sequence.