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TECPak
User’s Manual · Page 17
to quickly recall them. This is particularly useful when the instrument is used in
multiple setups, and the particular configuration of each setup can be stored
and later recalled for a quick reconfiguration.
To store a configuration, use the *SAV command over the computer interface.
To recall a configuration, use the *RCL command.
Using the TEC Interlock/LED Interface
The
TECPak
features a combination digital input/digital output/LED interface on
pins 1 & 8. The most common use of this interface is to turn on an LED when the
output is on, but other functions can be assigned to the LED operation. It can
also be used as a digital input to remotely control the on/off state of the channel,
or to act as an interlock function.
The TEC:DIO:INMODE command controls how the digital input is to be used:
Off –
ignore the digital input
Interlock –
prevent operation until circuit is closed
Output On –
turn on the output when circuit is closed
You can also invert the logic level of the input using the same command. For
example, if the function was inverted, and set to
Output On
, the output would
turn on when the circuit was opened.
Of special note is the
Output On
function: this action is taken only on a transition
from open to closed state of the circuit. This allows the output to be turned off
via the front panel or remote commands even when the circuit is closed.
You can also drive an LED using the output function setting accessed via the
TEC:DIO:OUTMODE command. For example, this could be used to turn on a
LED whenever the output is on, but there are several functions to choose from:
Off
– turn the output off (this is the default setting)
On
– turn the output on
Out On
– whenever the channel output is on
Stable
– when the channel output has stabilized
T Limit
– the temperature exceeds the limits
I Limit
– operating at the current limit
Remote
– the unit is in remote mode
V Limit
– operating at the voltage limit
Like the digital input, the output function can be inverted for active low signals.
