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3BUS 208 000 R1301152 Measurement Setup

Air Profile Compensation for Ash, Basis Weight

(TLK-5/-8/-9), Caliper, Bottom & Top Gloss,

and OptiPak

Air profile compensation (APC) allows for any mechanical misalignments of the

platform without degrading the measurement performance. During the data

collection mode of the APC, the system allows the sensor head to traverse the entire

measure limits of the frame (the maximum values allowed for scan limits) without

any process in the gap. During this time the system measures deflection related

measurement data. This data can be used to smooth out any errors in the

measurement due to platform irregularities. For Basis Weight (TLK-5/-8/-9) and

Ash sensors only the older ones not being compensated for the gap measurement

would need APC.

Air Profile Collection

To use APC the system needs to collect an average air profile. The data collection

can be done by using a combination of Host and Workstation commands. The newer

Host interface does not support the same interface as older hosts, but the following

procedure should work for all systems (independent of the Host). The data collection

can only be done while a sheet-break is present (no process present) and with auto-

edge-of-sheet turned off.

To collect enough data the sensors must measure a minimum number of scans

defined by the instance variable minAirProfileScans on a per sensor basis. The

default value is 5. When the system finishes generating the air profile the head will

move to the off-sheet position and reset the scan limits to the last known values.

The number of scans the system automatically makes is 10 unless the operator

terminates this operation by taking the frame off-sheet.

Note: Unless otherwise noted all steps are performed from the Service

Workstation.

1. If there is not a sheet-break present, use the dim utility to invert the input and

cause this to happen.

2. Use the inspect utility to set the existence flags for the sensors using air profile

compensation. From the inspect prompt:

betaSensor01->airProfileCompExists = 1 (for Basis Weight)

ashSensor01->airProfileCompExists = 1 (for Ash)

caliperSensor01->airProflieCompExists = 1 (for caliper)

topGlossSensor01->airProfileCompExists = 1 ( for Top Gloss)

bottomGlossSensor01->airProfileCompExist = 1 (for bottom Gloss)

optipakSensor01->opacityAirProfileCompExst = 1 AND

optipakSensor01->brightnessAirProfileCompExst = 1 (for OptiPak)

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E-Mu SP1200 Spezifikationen Seite 174