Keithley 2303 User Manual

Long Integration Measurements 4-9
C. SENSe:LINTegration:SEARch <b>
Boolean Parameters:
• OFF or 0 - The search will stop after the first timeout period expires. The search can
be restarted by enabling the search, or by sending a trigger reading command (such as
READ?).
• ON or 1 - The instrument will continue to search for a pulse after the timeout period
expires. Therefore, with a long timeout setting and the search enabled, the instrument
may appear locked up while it is searching for the pulse to start the long integration.
In addition, the time needed to execute code after timing out, and to start the pulse
search, is fast compared to timeout settings. Hence, with no pulse detection and search
enabled, the power supply is mostly searching for the pulse.
D. SENSe:LINTegration:FAST <b>
Boolean Parameters:
• OFF or 0 - The instrument searches for pulses when it receives :TLEVel commands to
determine if the level value will cause pulses to be detected. In addition, the unit will
take background readings between user trigger commands to determine if the pulse
still exists.
• ON or 1 - The unit does not search for pulses when it receives a :TLEVel command
and will not take background readings between user trigger commands. Therefore, the
pulse trigger timeout bit in the measurement event register is not updated unless a user
trigger command is sent. Plus, the NO PULSE message will only appear after receiv-
ing a user trigger reading command. With this setting, only a user trigger reading com-
mand causes the unit to look for a pulse. Therefore, no information on pulse detection
is available until a user triggered command is received.
E. READ?
After sending a trigger reading command to perform long integration measurements, do
not address the power supply to talk until all readings are completed. Details on READ?
and the other signal oriented measurement commands are provided in Section 9.
Programming example
The following command sequence will trigger and return one long integration measurement:
SENS:RANG 5 ‘ Select 5A range.
VOLT 15 ‘ Set output voltage to 15V.
CURR 0.75 ‘ Set current limit to 750mA.
OUTP ON ‘ Turn output on.
SENS:LINT:TIME:AUTO ‘ Set integration time automatically for
single pulse.
SENS:LINT:TLEV 0.1 ‘ Set trigger level to 100mA.
SENS:LINT:TEDge RISING ‘ Select rising trigger edge to initiate
‘ measurement.
SENS:FUNC “LINT” ‘ Select long integration function.
READ? ‘ Trigger and return one reading.

Keithley 2303 Specifications

General

Brand	Keithley
Model	2303
Category	Power Supply
Language	English