Meilhaus Electronic Mile House El.MML USB MEAS/switch RedLab® 1008 Hoja De Datos

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.  

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

 on page 4-6 for the location of 

the GND terminal pins. 

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 
"

" on page 5-1 for calibration instructions. 

The TST terminal is reserved for factory testing only. 

The input connection to the 32-bit external event counter is made to the screw terminal 
labeled CTR. Refer to the 

 on page 4-6 for the location of this pin. 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. 

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. 

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