Table of Contents
Advertisement
72
Chapter 6
6.2.2
Drive Current Load Resistor Selection
6.2.3
Local Operation Current Source (I
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
Calibration
Laser Drive Current
200 mA
500 mA
1,000 mA
3,000 mA
6,000 mA
Table 10 - Drive Current Load Resistor Selection
a.
With the output off, connect a load resistor, as selected Table 10, and a
calibrated ammeter in series across the laser output terminals. If an
ammeter with the appropriate current ratings is unavailable, connect a
calibrated DMM across the laser output terminals to measure the
voltage across the resistor. Calculate the current in the following steps
by using Ohm's Law:
where V is the measured voltage across the resistor, and R is the
measured load resistance.
b.
Go to the single module display by first pressing the MENU button,
then the Modules soft key, then the soft key(s) that correspond to the
module to be calibrated.
c.
Press the Setup soft key and set the laser current limit (Io Lim) to one-
half scale plus 100 mA and output bandwidth as desired. Press the Prev
soft key to return to the single display.
d.
Press the OFF soft key to turn the laser output on, if it is not on already
e.
Go to the Calibration Screen. This is done by pressing the Menu
button, Config soft key, Calibrate soft key; then the soft key(s) that
correspond to the module to be calibrated.
f.
Press the the Io soft key. Follow the on-screen instructions to complete
the calibration. The calibration can be canceled without affecting the
stored constants if the Cancel soft key is pressed at any point prior to
completing the calibration.
Resistor
30 Ω, 2 W
10 Ω, 5 W
5 Ω, 10 W
2 Ω, 25 W
1 Ω, 50 W
) Calibration
o
I = V / R
Advertisement
Table of Contents
