Thermopile Sensors
1919-R User Manual
32
5.1
Operation of 1919-R with Thermopile Absorber Sensors
To use 1919-R with Thermopile sensors:
1.
Connect the Thermopile sensor to the 1919-R meter: Insert the 15 pin D type connector of the
measuring sensor cable into the socket marked
Sensor Input
on the rear panel of the 1919-R
meter. 1919-R will reconfigure itself to work with the attached sensor.
2.
All of the sensor’s measurement parameters are shown on the main screen. (These are also
available when you press the
Menu
button and select
Sensor
). Use the Navigation keys to
navigate to the parameter you want to change.
3.
Use the up (
↑
) /down (
↓
) Navigation keys to select the parameter to change and press the
Enter
key. Change the setting with the Navigation keys.
4.
Press the
Enter
key to save the settings.
Note:
The 1919-R automatically saves the current settings for the next power up.
Warning:
Do not exceed maximum sensor limits for power, energy, power density, and energy
. Otherwise, there is a risk of damaging the absorber.
5.2
Measuring Laser Power with Thermopile Sensors
When measuring laser power, center the laser beam carefully on the absorber surface and read
the power.
Power measurements can be displayed in
formats (by pressing
Menu > Display
and choosing the
Graph Type
). Updating measurement
parameters is performed in the main measurement screen. A sample is shown in
at the end of this procedure.
To measure laser power when using Thermopile sensors:
1.
Set
Mode
to
Power
. The measuring mode is set to
Power
, and you can specify the expected
laser
Range
,
Laser
setting, and
Average
power period. (The power is measured 15 times per
second.)
Figure
5-1 Setting the Measurement Mode to Power
2.
Set
Range
to
AUTO
or to one of the manual ranges, as follows:
AUTO
: Select autoranging when the laser power is unknown or varies widely. In autorange,
you do not have to change scales. When the reading of the meter or bar is more than
100% of full scale, the range goes to the next higher one. The ranges are arranged in
factors of 1, 10, 100, and so on. When the reading falls below 9% of full scale, the range
changes to one range lower. This change only occurs after a few seconds delay. This
provides overlap (hysteresis) to keep the 1919-R from flipping back and forth when
reading close to the end of the scale.
Manual range
: The correct manual range is the lowest one that is larger than the expected
maximum power of the laser. There are certain disadvantages to autorange, since it
changes scale even if you do not want it to do so. If you want to measure in the same
range all the time, it is better to use a manual range.
