Newport 6000 - Remote Operation ITE Current Calibration, Single Channel TEC

86 Chapter 7 Calibration
7.3.12 Remote Operation I
TE
Current Calibration, Single Channel
TEC
a. With the output off, connect a 1 Ω, 50 W resistor and a calibrated
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:
I = V / R
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 to be calibrated.
Send
TEC:CAL:ITE
to enter I
TE
calibration mode.
The module will be placed in I
TE
mode, limit set to 50% of full scale
plus 100 mA, and the I
TE
set point set to 50% of full scale.
The 6000 will be ready to receive the first measured current value
when, after a
TEC:CAL:ITE?
query is sent, a “1” is returned.
c. Input the actual current (as an <nrf value>) via the
TEC:ITE <nrf
value>
command. The 6000 will then drive the current to 25% of the
initial set point.
The 6000 will be ready to receive the second measured current value
when, after a
TEC:CAL:ITE?
query is sent, a “1” is returned.
d. Input the second actual current (as an <nrf value>) via the
TEC:ITE
<nrf value>
command. The 6000 will then drive the current to the
negative current value of the initial set point.
The 6000 will be ready to receive the third measured current value
when, after a
TEC:CAL:ITE?
query is sent, a “1” is returned.
e. Input the third actual current (as an <nrf value>) via the
TEC:ITE <nrf
value>
command. The 6000 will then drive the current to 25% of the
negative current value of the initial set point.
The 6000 will be ready to receive the fourth measured current value
when, after a
TEC:CAL:ITE?
query is sent, a “1” is returned.