Remote Operation Ite Current Calibration, Single Channel Tec Modules - Newport 8000 User Manual

84 Chapter 6
6.3.12 Remote Operation I
TEC Modules
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Calibration
With the output off, connect a 1 Ω, 50 W resistor and a calibrated
a.
ammeter in series across the laser output terminals. If an ammeter with
the appropriate current ratings is unavailable, connect a 1 Ω, 50 W
resistor across the laser output terminals and use a calibrated DMM 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. For dual and combination modules, also
connect a 10 kΩ resister across the sensor input.
b.
Go to the single module display by first pressing the MENU button,
then the Modules soft key, then the slot soft key that corresponds to the
module to be calibrated.
c.
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.
c. Enter the TEC I
TE
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.
Current Calibration, Single Channel
TE
With the output off, connect a 1 Ω, 50 W resistor and a calibrated
a.
ammeter in series across the laser output terminals. If an ammeter with
the appropriate current ratings is unavailable, connect a 1 Ω, 50 W
resistor across the laser output terminals and use a calibrated DMM 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.
Enter the TEC:CHAN command to select the channel [,suchannel] to
be calibrated. Send TEC:CAL:ITE to enter I
I = V / R
calibration mode by pushing the I
I = V / R
soft key.
TE
calibration mode.
TE