Keithley 2002, User Manual

Page: 231 / 366

IEEE-488 Reference
3-108
Voltage Threshold:
<n> = -0.6 to +0.6 Trigger level for 1V range
-6 to +6 Trigger level for 10V range
-60 to +60 Trigger level for 100V range
-600 to +600 Trigger level for 1000V range
DEFault 0V trigger level
MINimum Range dependent as shown above
MAXimum Range dependent as shown above
:LEVel? Query trigger level
:LEVel? DEFault Query *RST default trigger level
:LEVel? MINimum Query lowest allowable trigger level
:LEVel? MAXimum Query largest allowable trigger level
These commands are used to specify trigger levels for the specified (current or voltage) input
signal. An appropriate trigger level is necessary in order for the frequency counter to operate
properly. The instrument only counts cycles whose peak signal amplitude reaches the pro-
grammed trigger level. See paragraph 2.4.4 (Trigger Level) for more information.
PRINT #1, "output 16; freq:thr:curr:rang .01" ' Select threshold range
PRINT #1, "output 16; freq:thr:curr:lev .005; lev?" ' Set trigger level
PRINT #1, "enter 16" ' Get response from 2002
:TTL
[:SENSe[1]]:FREQuency:THReshold:VOLTage:TTL Select TTL trigger level
This action command is used to configure the voltage trigger level for a TTL input signal. After
this command is sent, the 10V threshold voltage range is selected and a threshold trigger level
of 0.8V is established.
PRINT #1, "output 16; freq:thr:curr:volt:ttl" ' Select TTL threshold
PRINT #1, "output 16; freq:thr:volt:rang?; lev?" ' Query threshold range and
trigger level
PRINT #1, "enter 16" ' Get response from 2002
:TRANsducer <name>
[:SENSe[1]]:TEMPerature:TRANsducer <name> Specify transducer type
<name> = RTD Two-wire RTD transducer
FRTD Four-wire (and three-wire) RTD transducer
TCouple Thermocouple transducer
DTC Differential thermocouple transducer
INTernal Internal transducer
:TRANsducer? Query transducer type
This command is used to program the instrument for the transducer type that you are using. If
using a two-wire RTD transducer, select RTD. If using a three-wire or four-wire RTD, select
FRTD. If using a thermocouple, select TCouple. Select DTC if performing differential TC tem-
perature measurements using the Model 1801 Nanovolt Preamp.
Use the INTernal transducer to measure the internal temperature difference from the calibration
temperature of the Model 2002.
Query
Description
Program fragment
Description
Program fragment
3.18.17
Parameters
Query
Description