RTI Piranha, Reference Manual, Page: 147 / 181

5. Measurements with the Piranha System
Tube Current Probes
2014-06/5.5C
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Piranha & QABrowser Reference Manual
Note that we are relatively close to the lower
limit for the MAS-2 probe and the signal may
look "noisy". The figure to the left shows the
waveform when the tube current has been
increased to 100 mA.
Light Measurement 5.9
The Piranha Light Probe is a highly sensitive light detector. It has two different adapters
to measure the quantities luminance and illuminance. The most common applications
for the Piranha Light Probe are luminance (cd/m²) measurements on CRTs (monitors)
and viewing boxes, and illuminance (lx) measurements of ambient light in a room or in
front of a CRT. Read the Piranha Light Probe User's Manual for a detailed description of
practical use and explanation of the theory behind the units and quantities of light.
The monitor adapter is shown to the left and the lux adapter to the right.
5.9.1 Luminance - Monitor/Viewbox (cd/m²)
Read the Piranha Light Probe User's Manual to get information about how to do
different type of measurements and how to use the different adapters.
To measure luminance (cd/m²):
1. Attach the monitor adapter to the Piranha Light Probe as described in the Piranha
Light Probe User's Manual.
2. Connect the Piranha Light Probe to the Piranha.