Vaisala PTB220 User Manual download pdf (Page 78)

USER'S GUIDE_______________________________________________________________________

72 ___________________________________________________________________ M210194EN-A

*** Defined as the root sum of the squares (RSS) of end-point non-

linearity, hysteresis error, repeatability error and calibration

uncertainty at room temperature.

**** Defined as ±2 standard deviation limits of temperature

dependence over the operating temperature range.

General

(* factory setting)

Supply voltage 10 ... 30 VDC, reverse polarity

protected

Supply voltage sensitivity negligible

Current consumption

operation mode < 30 mA

with local display < 50 mA

hardware shutdown mode < 0.1 mA

with analog module < 50 mA

with analog module

and local display < 75 mA

Serial I/O full duplex RS 232C * or

bidirectional TTL level or

RS 485/422 half duplex (optional)

code ASCII

parity even*, odd, none

data bits 7* or 8

stop bits 1* or 2

Pulse output TTL level pulses at 5 kHz or 50

kHz

Pressure units hPa*, kPa, Pa, mbar, inHg, mmHg,

torr, mmH

O, psia

Baud rates 300, 600, 1200, 2400, 4800, 600*

Resolution

Class A 0.01 hPa*

Class B 0.1 hPa*

Settling time at power-up (one sensor)

Class A 4 seconds*

Class B 3 seconds*

Response time (one sensor)

Class A 2 seconds*

Class B 1 second*

fast measurement mode 0.2 seconds*

Acceleration sensitivity negligible

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Vaisala PTB220 User Manual Page 78

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