Starrett SR200 Surface Roughness Tester Manual de usuario descargar pdf (Pagina 25)

SR200 Speciﬁcations subject to change 5.5

Speciﬁcation for Data Dump

The following format is used for data dump from SR200 to a PC.

Transmission set up is as follows:

Baud rate: 9600 Baud

Number of data bits

Start bit: 1

Stop bit: 1

Parity: None

Resolution Horizontal Vertical

0.5µm for Evaluation 10nm

Length 8mm

1.0µm for Evaluation

Length >8mm

Evaluation length selectable

0.25mm, 0.8mm, 1.25mm,

2.5mm, 4.00mm, 8.0mm,

12.5mm. 25.0mm

Range selectable 10µm, 100µm, 300µm

Transmission RS232

Transmitted data is unﬁltered No parameters are calculated

Transmission data

Data type Function Comments

2 bytes Number of data values

Total number of

transmitted data values

1 byte Ordinate spacing

Number of data values

per mm

1 byte First data value Resolution 10nm

1 byte Diff data value

Difference between this

and the previous data

value

#80 Stop byte 2 stop bytes are sent

#80 Stop byte

Making it possible to test

for all data values received

The total number of transmitted data bytes are, number of data values +5

The data value can be calculated from, data value (n) = date value (n-1) + diff data value

(n), n1.

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Starrett SR200 Surface Roughness Tester Manual de usuario Pagina 25