TRI-SEN – Functions_231
9.3 Measuring the cell temperature
When switched on, the TRI-SEN signals its readiness for operation
with a short beep. The TRI-SEN has a temperature sensor at the
top end for contactless measurement of the cell temperature. The
front side of the sensor is held directly and completely on one of
the solar cells. If the sensor is applied too fast with some module
surfaces, there may be a heat buildup between sensor and glass
surface. Depending on the structure of the module glass, the sen-
sor must rest for approx. 2 seconds on the glass before the module
temperature can be measured.
As soon as the °C measurement button is pressed at least for a sec-
ond you hear hear a beep indicating that the device is now meas-
uring the temperature
The measured temperature is shown on the screen while the °C
button is pressed. When the temperature button is released, the
screen changes to the average temperature of the measurements
taken. The number of measurements is shown in brackets. It is rec-
ommended to measure the temperature at least 5 times before
measuring the characteristic curve and at least 5 times after. The
more measuring points were included and distributed in the
string, the more precise will be the average temperature for the
STC calculation.
The average temperature is included when converting the meas-
ured characteristic curves to the STC characteristic curves. The
temperature should be measured at various points of the module
surface. The average temperature is updated with each new
measurement.
It is recommended to measure the lower, middle and upper solar
cells distributed in the string because of the temperature differ-
ence between the upper and lower solar cells. The average tem-
perature reading is stored until the device is switched off.
Warning: Switching the TRI-SEN off will delete all measured data!