Temperature stabilizer card, with Peltier
cell for laser diodes, PID temperature controller, and NTC
temperature sensor (10k). The card can be interfaced to a
computer via the PC104 bus (ISA protocol). The card base address
is selectable on customer’s demand.
Operating on a 14-bit DAC, it is possible to set the laser
diode temperature via software within -20° e +80°
C (resolution is about 1/100°).
The card can supply a maximum of 1.2 A to power the Peltier
cell. Temperature stabilization can be started both manually,
and via software
It is possible to monitor on-line all the parameters describing
the card performance. A series of dedicated analogical inputs
supervise the following:
- The 12 V powering tension
- The current flow in the Peltier cell
- The temperature value set for stabilization
- The temperature of the laser diode by way of a NTC sensor
- The signal, useful as a reaction to the stabilizing circuit (TERR), in proportional tension to the difference between the set and the measured temperature.
- The card temperature.
In addition, some auxiliary digital and analogical input/output
ports, to check or monitor eventual additional devices, are
available to the customer.
The card is equipped with two digital inputs, two digital
outputs, and one analogical input managed by a 12-bit ADC.
The ADC can operate both in bipolar mode or bipolar with top
scale either of 5 or 10 V.
In case of problems in reading the internal ADC, the card
generates and sends an interrupt signal to the CPU.
