LDC-3700 Series 9
CHAPTER 2
OPERATIONS
This chapter introduces you to the operation of the LDC−3700B Series Controllers. It offers
instructions for connecting your laser to the current source and temperature controller and describes
powering up the instrument. This chapter also contains step by step procedures that teach you how
to operate your controller in Constant Current Mode, Constant Power Mode, and to operate the
temperature controller in Constant Temperature Mode. ILX recommends that you review the
contents of this chapter at a minimum before operating your new controller.
Applying Power to your LD Controller
To turn on the LDC−3700B Controller, rotate the key in the "POWER" section of the front panel from
"O" to "I". This action initiates the power on sequence. If the LDC−3700B does not appear to turn on,
verify that it is connected to line power. If line power is not the problem, remove the power cord and
check the line power fuse.
Note: The instrument contains a laser current source that has remote interlock capability.
This allows you to connect the interlock circuit to an external switch for safety. If the
interlock is removed, the laser current output is disabled. Refer to the laser module manual
for details about the interlock function.
The instrument is also equipped with a laser enable key switch. This ensures that the laser
current can be turned on only if the key is inserted and in the On position.
The Power On Sequence
During the power−up sequence, the following takes place. For about three seconds all indicators
light up, and all of the 7−segment displays indicate "8". Then all lamps are turned off for three
seconds. Next, the firmware version displays in the LASER display section followed by the TEC
sensor switch position displayed on the TEC display. Then, a self−test is performed to ensure that
the instrument’s hardware and processor are communicating. After this test, the instrument is ready
to operate, and is configured to the state it was in when the power was last shut off.
The Power On State
You can choose to "clear" the last saved instrument state by recalling the default values. These
values are stored in BINS to which you can save or recall instrument configurations (described in
more detail in Chapter 5). "BIN 0" contains all of the default configurations listed on page 10.
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