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48
Chapter 4
I
=, T
SET
temperature resistance, AD590 sensor current, or LM335 sensor voltage. In the
screen shown above, the T
seen when operating in those modes. Set point can be changed with numeric keys or
the knob.
I=, T=, R=, i=, and v= - Indicates the measured value of current, temperature or
resistance. A Sens err indicates a sensor error, usually caused by the sensor not
hooked up or the wrong sensor selected. In the screen shown above, the T is shown.
I, R, i, and v would be seen when operating in those modes.
OFF/ON - Indicates the state of the TEC output. Pushing the adjacent soft key
toggles the state.
Setup - Pushing the adjacent soft key activates the setup screen.
The bottom line on the display has 6 "LED" elements, each indicating a particular
state of the laser. They are defined as:
I
LIMIT
V
LIMIT
T
LIMIT
R
LIMIT
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Temperature Controller Module Operation
Figure 24 - TEC Main Screen
=, R
=, i
=, and v
SET
SET
SET
is shown. I
SET
When illuminated, indicates the TEC module is in current
limit.
When illuminated, indicates the TEC module has reached it's
voltage limit.
When illuminated, indicates the TEC module is outside the
temperature limits defined by T
When illuminated, indicates the TEC module is outside the
reference limits defined by R
setup screen.
= - Indicates the set point value of current,
SET
=, and v
R
, i
SET,
SET
SET
and T
HI
/v
/i
HI
HI
HI
= would be
SET
in the setup screen.
LO
and R
/v
/i
in the
LO
LO
LO
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