25
2.7
Power Up
Turn on the Model 2835-C by depressing the front panel key until it clicks in
and remains in its depressed position. The Model 2835-C will perform a power
up self test and then configure itself to its last operating state. If the last
operating state is not compatible with one of the current detectors, the 2835-C
adopts the default configuration appropriate to this new detec-tor. If the
meter does not pass its self test or fails to respond to front pa-nel key com-
mands, refer to Section 6, Maintenance, Test and Troubleshooting.
2.8
Performing Basic Measurements
Basic measurement techniques for using the Model 2835-C are covered in the
following sections. Refer to Table 2, Table 3 and Table 7 (pages 6, 10, and 15
respectively) for a review of the Model 2835-C’s functions and capabilities.
The following instructions assume familiarity with the meters functions. They
also include steps to incorporate background correction and assume that the
experimental setup underfills and does not saturate or damage the detector.
2.8.1
Making DC Power Measurements
The following process describes the procedure for making basic optical power
measurements while properly removing the influence of ambient light and
other drift effects.
i.
Plug in a Newport Low-Power or High-Power detector via its associated
calibration module and then turn the meter on. Set MODE to DC CONT, set
AUTO on and set the measurement wavelength to the desired value.
ii. When using a Newport High-Power (thermopile) detector, execute AUTO
CAL per Section 2.4.4.
iii. Cover or otherwise block the source that you will be measuring and then
turn ZERO on.
iv. Uncover the source so it illuminates the detector and note the display value.
This reading is the optical power observed by the detector due to the source.
NOTE
The process as detailed assumes that the ambient signal is not changing
between when you zero the display and when you make your measurement.
Remember, if you can see your detector as you move around, then your
detector can see you as a changing ambient DC signal!
2.8.2
Making Peak-to-Peak Power Measurements
The following process describes the procedure for making basic optical peak-
to-peak power measurements.
i.
Plug in a Newport Low-Power detector via its associated calibration
module and then turn the meter on. Set MODE to P-P CONT, set AUTO on
and set the measurement wavelength to the desired value.
ii. Illuminate the detector and note the display value. This reading is the
peak-to-peak optical power observed by the detector.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
