97
ignored. The maximum error due to the above factors is
given in Table 3 below.
Wave Length
Error, Filter Out*
PD300
PD300-
TP
PD300-
3W
PD300-UV
PD300-IR
PD300 -IRG
3A-IS
200 - 270nm
±6%
270 - 360nm
-
-
±3%
-
360 - 400nm
±10%
±7%
±10%
±3%
-
400 - 950nm
±3%
±3%
±3%
±3%
5%
950 - 1100nm
±5%
±5%
±5%
±5%
±4%
10%
1100 - 1650nm
-
-
-
±4%
±3%
1650 - 1800nm
-
-
-
±7%
±5%
* Add ±2% to error for filter in (±4% for PD300-UV from 220 to 400nm).
Maximum Error as a Function of Wavelength and Filter
Note:
More exact specifications will be found in the latest
Ophir Laser Measurement Instruments Catalog.
9.2.3. Recalibration at a specific wavelength from a
Known Source of Laser Power
1. From the main measurement screen select “Menu”
and enter. Select “Calibrate” and enter.
2. Enter “Laser” and select the proper laser wavelength.
Enter “Average” and enter the desired averaging
period.
3. Apply the known laser power/energy.
4. Select “Factor” and enter the “Modify” screen.
Adjust the factor until the power reading on the
screen equals the known power. Press “Save” and
the power calibration factor under “Updated” will
change accordingly. See Note 1.
Note 1:
The relative readings at different wavelengths are
fixed by the wavelength calibration curve stored in
the sensor EEROM. When changing the calibration at
one wavelength, the calibration at all other
wavelengths will change proportionately.
Table 3
