HP Indigo W7250 IR Sensors Reading and Calibration -- CA393-09500 Rev 03 - Page 5

SysTabIO Editor

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9. Ensure that the area that is being read by the IR scanner is close to the IR sensor. 10. After the ITM drum heats up to the Ready temperature, wait approximately one minute for the ITM drum temperature to stabilize. 11. If you are using an IR scanner, set the IR scanner emissivity to 0.95. See the IR scanner documentation if necessary. 12. Use the external IR scanner to measure the temperature of the blanket. 13. Look at the IO_EXT_HEATER_TEMPERATURE_IR1 systab value (for example, 1098 = 109.8 °C). 14. Calculate the difference between the external measurement and the systab value. 15. If the difference is greater than ±3 °C, then look for a possible hardware failure, such as incorrect mounting, dust build-up, etc. 16. If you cannot find a hardware failure, do the following: a. In the System Table Editor window (not the SysTabIO Editor window), select irTempPropertiesTopic, blanketTempIROffset[0]. b. Apply the difference to the value in the offset field (for example, if the systab value is 8.6 °C greater than the external measurement, then subtract 86 from the value in the offset field). c. Wait approximately one minute for the ITM drum temperature to stabilize. d. Repeat steps 12. - 16.. 17. Use the external IR scanner to measure the temperature of the ITM drum. 18. Look at the IO_ITM_TEMPERATURE systab value (for example, 1098 = 109.8 °C). 19. Calculate the difference between the external measurement and the systab value. 20. If the difference is greater than ±3 °C, then look for a possible hardware failure, such as such as incorrect mounting, dust build-up, etc... 21. If you cannot find a hardware failure, do the following: a. In the System Table Editor window (not the SysTabIO Editor window), select irTempPropertiesTopic, itmTempIROffset. IR Sensors Reading and Calibration 3

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9.
Ensure that the area that is being read by the
IR scanner
is close to the IR sensor.
10.
After the ITM drum heats up to the Ready temperature, wait approximately one minute for the ITM
drum temperature to stabilize.
11.
If you are using an
IR
scanner, set the
IR
scanner emissivity to 0.95. See the
IR
scanner
documentation if necessary.
12.
Use the external IR scanner to measure the temperature of the blanket.
13.
Look at the
IO_EXT_HEATER_TEMPERATURE_IR1
systab value (for example, 1098 = 109.8 °C).
14.
Calculate the difference between the
external
measurement and the systab value.
15.
If the difference is greater than ±3 °C, then look for a possible hardware failure, such as incorrect
mounting, dust build-up, etc.
16.
If you cannot find a hardware failure, do the following:
a.
In the
System Table Editor
window (not the
SysTabIO Editor
window), select
irTempPropertiesTopic, blanketTempIROffset[0]
.
b.
Apply the difference to the value in the offset field (for example, if the systab value is 8.6 °C
greater than the
external
measurement, then subtract
86
from the value in the offset field).
c.
Wait approximately one minute for the ITM drum temperature to stabilize.
d.
Repeat steps
12.
-
16.
.
17.
Use the external IR scanner to measure the temperature of the ITM drum.
18.
Look at the
IO_ITM_TEMPERATURE
systab value (for example, 1098 = 109.8 °C).
19.
Calculate the difference between the
external
measurement and the systab value.
20.
If the difference is greater than ±3 °C, then look for a possible hardware failure, such as such as
incorrect mounting, dust build-up, etc...
21.
If you cannot find a hardware failure, do the following:
a.
In the
System Table Editor
window (not the
SysTabIO Editor
window), select
irTempPropertiesTopic, itmTempIROffset
.
IR Sensors Reading and Calibration
3