EGM-5 Operation Manual V. 1.04 14 support@ppsystems.com
External Sensors/Chambers
The following sensors/chambers are external to the EGM-5 and electrical connection is made to the
Probe Ports (Probe 1 and Probe 2) located on the back of the EGM-5. See Probe Port Settings on page
40 for more information for proper connection. Gas connections (if applicable) are made to the “Gas In”
and “Gas Out” ports on the back of the EGM-5.
Quantum Sensor
An optional quantum sensor (Apogee Instruments) is available for use with the EGM-5 for accurate
measurement of PAR (Photosynthetically Active Radiation) and it is specifically calibrated for use in
sunlight conditions. The sensor housing features a fully potted, dome-shaped head, making the sensor
fully weatherproof for self-cleaning. Never use an abrasive material or cleaner on the diffuser.
• Range: 0-3000 µmol m
-2
s-
1
• Calibration Uncertainty: ± 5%
• Measurement Repeatability < 1%
• Long Term Drift: < 2% per year
• Cable Length: 5 meters
An optional leveling unit (ACS039) is also available for use with the quantum sensor. We highly
recommend that you mount the sensor on a horizontal surface and that it is level for best results. To
minimize azimuth error, the sensor should be mounted with the cable pointing toward true north in the
northern hemisphere or true south in the southern hemisphere. Azimuth error is typically less than 1%,
but is easy to minimize by proper cable orientation.
We recommend recalibration of the quantum sensor every 2 years.
TRP-3 Temperature/PAR Probe
An optional probe can be used with the EGM-5 for measurement of temperature and PAR. It consists of a
rugged, aluminum housing with black foam cover. It also includes a standard tripod thread mount for use
with commercially available tripods. The single gas connection for this probe is made to the “Gas In” port
on the EGM-5.
Temperature Sensor (Precision Thermistor)
• Range: 0-50
o
C
• Accuracy: ± 0.3
o
C at 25
o
C
PAR Sensor
• Fully cosine corrected
• Range: 0-3000 µmol m
-2
s-
1
• Accuracy: ± 10 µmol m
-2
s-
1
Cable Length: 1.5 meters
We recommend recalibration of the PAR sensor every 2 years.
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