Average Readings Count - Keithley 2302 Instruction Manual

sure to factor in the trigger delay (both internal plus user) when determining integration times
(see Figure 3-2). When manually set using the front panel keys, the values are changed in
increments of 33.3333μsec. This ensures that an integral value of 33.3333μsec will be selected.
NOTE
Auto time does not account for user trigger delay — if using auto time, make sure the
user trigger delay is appropriately set for the desired overall measurement time.
NOTE
Do not use auto time with the Model 2306-VS if the other channel has trigger external
enabled
After auto time acquires a time value (auto time), the auto time is adjusted for the internal
trigger delay of 15μsec (auto internal time). The auto internal time is then adjusted to be an
integral time value of 33.3333μsec (auto integral time). For example:
auto time value
auto internal time = 28.053ms - 0.015msec = 28.038ms
auto integral time = 28.033ms (response returned when time setting is queried)
When a pulse time is set via the bus, the time is assumed to be an auto internal time (i.e., the
value is assumed to be adjusted for the internal delay value). This value is then adjusted to the
applicable integral value. For example:
manual time value = 5.040msec
integral time

Average readings count

NOTE
The menu item AVER READINGS #1/#2 applies to average readings for DVM, I and
V where AVERAGE READINGS under PULSE CURRENT #1/#2 menu item applies
to pulse current measurements.
The average readings count specifies how many measurements (integrations) are performed
and averaged for each displayed reading. For example, assume that the pulse average readings
count is 10 and you are measuring PULSE HIGH. Each displayed reading will reflect the
average of 10 peak pulse measurements.
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com
(Section 6).
= 28.053msec
= 5.033ms (response returned when time setting is queried)
Pulse Current Measurements 3-5