Saia-Burgess
Controls Ltd.
Hardware Manual for the PCD3 Series│Document 26/789; Version E 5│31.01.2005
Hardware
PCD3.W3x0
5-49
5
Formulae for temperature measurement
For Ni 1000 (PCD3.W340)
Validity:
Temperature range - 50...+ 210°C
Computational error:
± 0.5°C
T= - 188.5 +
- 4.676 • 10
-6
• (DV - 2784)
2
For Pt 1000 (PCD3.W340)
Validity:
Temperature range - 50...+ 400°C
Computational error:
± 1.5°C
T= - 366.5 +
+ 18.291 • 10
-6
• (DV - 2821)
2
For Ni 100 (PCD3.W350)
Validity:
Temperature range - 50...+ 250°C
Computational error:
± 1.5°C
T= - 28.7 +
- 7.294 • 10
-6
• (DV - 1850)
2
For Pt 100 (PCD3.W350)
Validity:
Temperature range - 50...+ 600°C
Computational error:
± 1°C
T= - 99.9 +
+ 6.625 • 10
-6
• (DV - 2114)
2
For Pt 1000 (PCD3.W360)
Validity:
Temperature range - 50...+ 150°C
Computational error:
± 0.25°C
T= - 178.1 +
+ 3.873 • 10
-6
• (DV - 2786)
2
T = Temperature
DV = Digital Value
Resistance measurement up to 2.5 kΩ, only PCD3.W340 (Jumper must be on
position Pt/Ni 1000)
Special temperature sensors or any other resistances up to 2.5 kΩ can be connected
to the PCD3.W3xx. The digital value can be calculated as follows:
where 0 ≤ DV ≤ 4095 and R=the resistance to measure in Ω.
260 • DV
2616
450 • DV
2474
300 • DV
3628
650 • DV
3910
200 • DV
2509
DV=
10 • R • 4095
(7500 + R) • 2.5
