Specifications

MODEL 370 REV: D Page 18 of 26
4. Position the head in the laser beam or in the measurement field. (See
Figure E-5.)
5. Refer to the calibration sheet. This will indicate which channel should
be used, what multiplication factors are applicable and what
attachments or other conditions apply.
6. Follow the zeroing procedure outlined in the operating manual.
7. Adjust the range switch until a non-full scale reading is obtained.
8. Verify that the radiant flux and irradiance are less than the values stated
in step 1.
9. Adjust the detector head in translation and also in tilt while observing
the meter, in order to verify that the beam is fully on the detector and
no unusual shadowing is taking place.
6.3.4 Typical Measurement Units
- W, mW
- W/cm
2
, mW/cm
2
6.3.5 Procedure For Use With Narrow-band Light Sources Outside the Range
450-950nm
The set-up described above can be used for sources outside the 450-950nm
range but inside the range 300-1100nm with the following procedure.
1. Obtain a single point calibration from UDT Instruments for use
without the radiometric filter at the wavelength of interest.
2. Delete the radiometric filter from the test setup and take the reading as
outlined above but using the single point calibration.
6.3.6 Procedure For Use With a Light Source Greater Than 10mw or Greater than
500mw/sq cm Irradiance
By adding one or more of the accessories listed below the measurement
range can be extended by the multiplication factor indicated.
Model # Description Multiplier Comment
105 ND 1 filter 10 May cause inaccuracies because of
multiple reflections (0.5W max).
105 ND 2 filter 100 May cause inaccuracies because of
multiple reflections (0.5W max).
107 ND 3 filter 1000 May cause inaccuracies because of
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