Getting Started
1-21
Measuring High-Efficiency PV Modules
High-efficiency PV modules have high capacitance and can produce a short but intense inrush current at
the start of the I-V measurement. In extreme cases this inrush current can trigger the I-V Measurement
Unit's over-current protection circuit, causing the I-V Unit to internally disconnect from the PV source
circuit and temporarily enter the over-current "Disabled" mode. See the section: Are you measuring
high-efficiency modules?
SolSensor Precautions
Covering the Irradiance Sensor
When not in use, always keep the irradiance sensor (white acrylic disc) covered using the supplied
black rubber cover. Remove the cover after mounting SolSensor in the plane of the array, and replace
the cover again before moving SolSensor to another location.
WARNING The white acrylic ‘eye’ of the irradiance sensor is a precision optical element which must be kept
in 'like new' condition to assure accurate measurements. It is easily damaged by impact or
abrasion, and its accuracy is also compromised by soiling. Keep the cover on when not in use.
Cleaning the Irradiance Sensor
The irradiance sensor (white acrylic disc) should be cleaned using only a soft cloth and distilled water.
Tip the SolSensor unit on its side so that the irradiance sensor is facing horizontally. Spray the white
acrylic disc with a fine mist of distilled water. Let the excess water runoff, carrying dust and dirt with it.
Dry the white acrylic disc with a soft, clean, dry cloth. Never use soap or chemical solutions or abrasive
cloths.
WARNING To clean the irradiance sensor, use only distilled water and a clean, soft, dry cloth. Soap or
chemical cleaners, and coarse cloth, can cause permanent damage to the acrylic material and
degrade irradiance measurement accuracy.
Battery Precautions
CAUTION SolSensor contains a small lithium battery and should not be disposed of with general refuse.
Dispose of the battery in accordance with all local codes and regulations for products containing
lithium batteries. Contact your local environmental control or disposal agency for further details.
WARNING Only use the battery charger supplied by Solmetric.
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