OPERATIONS
Functions and Features
30 LDC-3700 Series
CHAPTER 2
Functions and Features
This section introduces you to the LDC−3700B Controller’s functions and operating features such as
event triggering, analog modulation of laser injection current, TEC boosting and Save and Recall.
Saving and Recalling from the Front Panel
For applications where you might need to alternate between particular instrument configurations, the
LDC−3700B Controllers offer a unique SAVE AND RECALL feature. The SAVE feature allows you
to easily store all front panel settings for any given instrument configuration. These settings, which
are stored in one of ten memory bins, can be retrieved at any time with the RECALL function. This
saves setup time, and it reduces the chance of setup error for tests which are periodically repeated.
For example, using the configuration described in Chapter 2 where the controller is operating in
Constant Current and Temperature modes, the instrument parameters saved by using the SAVE
function would be Constant Current Mode, 200 mA range, a limit set point of 175 mA, a laser current
set point of 150 mA, Display Mode I, Constant Temperature mode, thermistor constants C1, C2, and
C3, a temperature set point of 35 °C, a loop gain of 30, temperature limit of 40 °C, and a TE current
limit of 2A. Once this set up is saved, the LDC−3700B Controller may be configured for another
unique set up. You can recall the original set up for the first experiment any time using the RECALL
function.
To enter the SAVE/RECALL mode, first exit both TEC and LASER modes (both TEC and LAS
indicators in the ADJUST section off). Press the SELECT switch in the PARAMETER section. The
SAVE indicator LED becomes lit and the unit displays the SAVE "bin" on the TEC display. If another
bin number is desired, press the SET switch and rotate the ADJUST knob until the desired bin
number is displayed. Releasing the SET switch completes the SAVE operation and all of the
instrument parameters are saved to the indicated bin number as they appear on the front panel.
To recall a previously saved instrument set up, press the SELECT switch until the RECALL indicator
led becomes lit. The instrument will display a RECALL "bin" number on the TEC display. If you
desire to change the RECALL bin, press the SET switch and rotate the ADJUST knob until the
desired bin number is displayed. Releasing the SET switch completes the RECALL operation. The
instrument is restarted and the front panel parameters are reconfigured to the new parameters
saved under that bin number.
LIM I
TE
SAVE
CONST
GAIN
LIM T
HI
TEC
LIM I
CAL PD
LIM I
LIM P
RECALL
SET
SELECT
LASE
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
To Next Page
Loading...
