User manual

Operation
31
Area Correction
and Zeroing
It is important that you zero the sensor before using
Area Correction, as explained in the following proce-
dure.
1. Enter Area Correction by pressing the Area button
for less than one second.
2. Set Auto Ranging by pressing the Auto button.
3. Block the sensor beam.
4. Allow the sensor to enter a steady (cool-down)
state. If you are using a thermopile sensor, this
steady state can be determined by watching the
display numbers on the LCD. At first the numbers
will decrease quickly but, as the sensor cools, the
numbers decrease more slowly—the slower the
decrease, the cooler the sensor, and the cooler the
sensor, the more accurate the area correction
reading will be. Optical sensors do not require a
cool-down period.
5. Press the Zero button.
The sensor is now zeroed. For more information about
zeroing, refer to “Zeroing” on page 39.
Avg
Average mode enables display smoothing, which
suppresses variations in the display reading that can
make it difficult to read.
Display values are averaged by time.