Here are correction factors per lamp for the Apogee Quantum meter calibrated for electric lamps.
I used two Licor senors, freshly calibrated and sent to me.
I took multiple measurements using the two LiCor sensors and averaged them to find a value. At the same time I took measurements with the Apogee sensor. Below are the results for 8 lamps I have been able to test so far.
AB10K: 1.0427000
XM20K: 1.0546230
Radium: 1.0202560
CoralVue10K: 1.0144440
Ushio10K: 1.0226470
Iwasaki: 1.0044030
BLSW: 1.0359310
SUN10K: 1.0413060
So if you have a Apogee Quantum meter calibrated for electric lamps, if measuring one of the lamps above, multiply the number the apogee meter gives you by the number provided for the lamp being measured. You will then have, essentially the same number as if you used the LiCor sensor.
As you can see the numbers provided by the Apogee meter are not that off from the LiCor. The highest error being 5.46% low when measuring the XM lamp. The reading given for the Iwasaki is almost spot on, only being off 0.44% low from the LiCor sensor.
I used two Licor senors, freshly calibrated and sent to me.
I took multiple measurements using the two LiCor sensors and averaged them to find a value. At the same time I took measurements with the Apogee sensor. Below are the results for 8 lamps I have been able to test so far.
AB10K: 1.0427000
XM20K: 1.0546230
Radium: 1.0202560
CoralVue10K: 1.0144440
Ushio10K: 1.0226470
Iwasaki: 1.0044030
BLSW: 1.0359310
SUN10K: 1.0413060
So if you have a Apogee Quantum meter calibrated for electric lamps, if measuring one of the lamps above, multiply the number the apogee meter gives you by the number provided for the lamp being measured. You will then have, essentially the same number as if you used the LiCor sensor.
As you can see the numbers provided by the Apogee meter are not that off from the LiCor. The highest error being 5.46% low when measuring the XM lamp. The reading given for the Iwasaki is almost spot on, only being off 0.44% low from the LiCor sensor.
