Intellipuff Service Manual
Page 18 of 51
Issue D 27/02/2014
EP59-12317
At this stage the reservoir pressure is checked before progressing to the next
step of the calibration process, the result of this check is communicated to the
user via the form below to indicate a PASS or FAIL, in the case of FAIL,
calibration is terminated and the program advises the user to take corrective
action. If this test passes the reservoir pressure check, the value is recorded
in the hand piece EEPROM and will be used as a system reservoir pressure
check after every puff during the life of the instrument. If the pressure drops
due to air leaks or any other reason, while using the instrument (i.e. after a
puff) the user will be alerted with a rolling message on the instrument’s 4
character display to run the self test program.
Having checked the reservoir pressure, pressing the next button displays the
alignment form shown below.
Alignment Form
The test eye should be fitted in front of the handset on the calibration jig.
In this form the ADC values of the detected light at the three photo detectors
A, B and C as well as the K value is displayed. This form allows light level
adjustment in order to set the light intensity to meet a predefined firing
condition. The form displays photosensor readings in ADC units, i.e. in the
range 0 to 4095 for all three diodes and a calculated K factor from those
diodes. The photosensor values will be presented block averaged at an
update rate of approximately 5 per second for viewing purposes.
During this stage, the test eye is aligned using the x, y, z table on the
calibration jig to give ADC values on photosensors A and C balanced to within
100 ADC units and the smallest K value.
Whilst the - in focus - condition is met the K factor display will be lime green
and the Next button enabled otherwise the display will be red and the
continue button disabled to force the user to align the system against the test
eye for best K position before progressing with the remaining calibration
process.
The Restart button is available to send the program to its previous stage. The
LED brightness can also be adjusted if necessary in achieving the best K with
selection of the Adjust LED option. The new LED brightness settings are
retained as EEPROM values.
