55
WIKA operating instructions process transmitter, model UPT-2x
14111166.02 04/2015 EN/DE
EN
15. Specifications
15.
Specifications
Measuring range
Measuring range
See product label
Vacuum tightness
Is provided, except for instruments for oxygen
applications
Overpressure limit
Measuring range ≤ 16 bar/300 psi: 3-fold
Measuring range > 16 bar/300 psi: 2-fold
Accuracy specifications
Accuracy
see product label, model code
UPT-2*-***-**-**-*****-****1*-** = 0.10 %
UPT-2*-***-**-**-*****-****2*-** = 0.15 %
UPT-2*-***-**-**-*****-****3*-** = 0.20 %
Including non-linearity, hysteresis, zero offset
and end value deviation (corresponds to
measured error per IEC 61298-2)
Mounting correction
-20 ... +20 %
Non-repeatability
≤ 0.15 % of span
Behaviour with turndown
■
For measuring spans ≥ 1.6 bar
- TD ≤ 5:1
No influence on the accuracy
- TD > 5:1 ... ≤ 100:1
Ges = GG + 0.03 % x (TD − 5)
■
For measuring spans < 1.6 bar
- TD = 1:1
No influence on the accuracy
- TD > 1:1 ... ≤ 100:1
Ges = GG + 0.03 % x (TD − 1)
Long-term stability (referred to basic measuring
range)
< 1 bar: 0.35 %/year
≥ 1 bar: 0.15 %/year
≥ 1.6 bar: 0.1 %/year
≥ 40 bar: 0.05 %/year
Thermal change zero point/span (reference
temperature 20 °C)
In compensated range 10 ... 70 °C:
no additional temperature error
Outside compensated range:
Typical < 0.1 % / 10 K
Thermal change of the current output (reference
temperature 20 °C)
< 18 °C and > 28 °C
0.1 % / 10 K (max. 0.15 %)
Ges: Overall accuracy via turndown
GG: Accuracy (e.g. 0.15 %)
TD: Turndown factor (e.g. 4:1 corresponds to TD factor 4)
