Pyroelectric and Photodiode Energy Sensors
1919-R User Manual
44
Warning:
Do not exceed maximum sensor limits for power, energy, power density, and energy
. Otherwise, there is a risk of damaging the absorber.
7.4.1
Zeroing the Energy Sensor Against the 1919-R Meter
For most accurate calibration, you should zero the Pyroelectric energy sensor against the 1919-R it
is being used with. This is important since there is a slight variation of Pyroelectric reading from
meter to meter. After this is done, the sensor is “conditioned” to work with the particular 1919-R
the zeroing was done against. It is not necessary to do this procedure again unless the 1919-R is
used with a different sensor. If the procedure is not done, errors of 2% or so can occur.
To zero the instrument against the energy sensor:
1.
Make sure the sensor is in a quiet environment and not subject to pulsed radiation.
2.
Press
Menu
and select
Instrument
.
3.
Press
Zero
and
Start
. Wait until “Zeroing completed successfully” appears.
Figure
7-1 Pyroelectric Zeroing
4.
Press
Exit
to return to previous screen.
After you have done zeroing, you do not have to do it again when used with the same type of
meter. If you have zeroed it against a different type of meter, then a different value has been
saved and when used with a 1919-R again, you should zero it again.
7.4.2
Setting Measurement Parameters When Using Energy Sensors
To set measurement parameters when using energy sensors:
1.
Set
Range
to the correct manual range that is the lowest one that is larger than the expected
maximum pulse energy of the laser.
Warning:
While
measuring pulsing lasers,
erroneous energy readings will result if the energy
range is not set up correctly.
