Hardware Manual

Hardware Manual PCD 1 / PCD 2 Series│Document 26 / 737│Edition EN 15│2008-07-22

Saia-Burgess Controls AG

PCD2.W3x0

Input/output (I/O) modules

5

Formulae for temperature measurement

For Ni 1000 (PCD2.W340)

Validity: Temperature range - 50 ... + 210 °C

Computational error: ± 0.5 °C

T= - 188.5 +

260 • DV

(^2616)

- 4.676 • 10 -6 • (DV - 2784)^2

For Pt 1000 (PCD2.W340)

Validity: Temperature range - 50 ... +400 °C

Computational error: ± 1.5 °C

T= - 366.5 +

450 • DV

2474 + 18.291 •^10

-6 • (DV - 2821) 2

Resistance measurement up to 2.5 kΩ (PCD2.W340)

Special temperature sensors or any other resistances up to 2.5 k�� can be connected

to the PCD2.W340. The digital value can be calculated as follows:

DV=

16 380 • R

(7 500 + R)

where 0 ≤ DV ≤ 4095 and R=the resistance to be measured in ��.

For Ni 100 (PCD2.W350)

Validity: Temperature range - 50 ... +250 °C

Computational error: ± 1.65 °C

T= - 28.7 +

300 • DV

(^3628)

- 7.294 • 10 -6 • (DV - 1850)^2

For Pt 100 (PCD2.W350)

Validity: Temperature range - 50 ... +600 °C

Computational error: ± 1 °C

T= - 99.9 +

650 • DV

3910 + 6.625 •^10

-6 • (DV -2114) 2

For Pt 1000 (PCD2.W360)

Validity: Temperature range - 50 ... +150 °C

Computational error: ± 0.25 °C

T= - 178.1 +

200 • DV

2509 + 3.873 •^10

-6 • (DV -2786) 2

T = temperature

DV = digital value