Ground Terminals; Calibration Terminal; Testing Terminal; Counter Terminal - Measurement Computing miniLAB 1008 User Manual

miniLAB 1008 User's Guide
Since laptop computers typically allow up to 100 mA, the miniLAB 1008 in a fully-
loaded configuration may be above that allowed by the computer. In this case, you must
determine the per-pin loading in the application to ensure that the maximum loading
criteria is met. The per-pin loading is calculated by simply dividing the +5V by the load
impedance of the pin in question.

Ground terminals

There are 9 identical ground connections that provide a common ground for all
miniLAB 1008 functions. Refer to the
the GND terminal pins.

Calibration terminal

The CAL connection on the output terminal provides a calibration reference voltage.
This terminal should only be used during calibration of the miniLAB 1008 device.
Calibration of the miniLAB 1008 is software-controlled via InstaCal. Refer to
"Calibrating with

Testing terminal

The TST terminal is reserved for factory testing only.

Counter terminal

The input connection to the 32-bit external event counter is made to the screw terminal
labeled CTR. Refer to the
internal counter increments whenever the CTR input voltage changes from <1 volt to
more than 4 volts. The counter is capable of counting frequencies up to 1 MHz.

Accuracy

The overall accuracy of any instrument is limited by the error components within the
system. Quite often, resolution is incorrectly used to quantify the performance of a
measurement product. While "12-bits" or "1 part in 4096" does indicate what can be
resolved, it provides little insight into the quality of an absolute measurement. Accuracy
specifications describe the actual results that can be realized with a measurement device.
InstaCal" on page 5-1 for calibration instructions.
pinout diagrams
pinout diagrams on page 4-6 for the location of
on page 4-6 for the location of this pin. The
4-12
Functional Details