16
WIKA Operating instructions/Betriebsanleitung, WU-2X
11553678.05 EN/DE 02/2019
Specifications
Models WU-20, WU-25 and WU-26
Response time (10 ... 90 %)
ms
≤ 300
Insulation voltage
VDC
500
Accuracy
% of span
≤ 0.15 (≤ 0.4 with pressure ranges ≤ 2 bar) RSS (Root Sum Squares)
≤ 0.3
1)
(≤ 0.6
1)
with pressure ranges ≤ 2 bar) per IEC 61298-2
Non-linearity
% of span
≤ 0.1 (≤ 0.15 for pressure ranges ≤ 2 bar) (BFSL) per IEC 61298-2
Hysteresis
% of span
≤ 0.14
Non-repeatability
% of span
≤ 0.12
1-year stability
% of span
≤ 0.25 % (typ.), at reference conditions (≤ 0.4 % with measuring ranges ≤ 2 bar)
Permissible temperature of
non-Ex
T4
T5
T6
■
Medium
-20 ... +100 °C
-4 ... +212 °F
-20 ... +85 °C
-4 ... +185 °F
-20 ... +60 °C
-4 ... +140 °F
-20 ... +40 °C
-4 ... +104 °F
■
Ambient
20 ... +85 °C
-4 ...+185 °F
-20 ... +85 °C
-4 ... +185 °F
-20 ... +60°C
-4 ... +140 °F
-20 ... +40 °C
-4 ... +104 °F
■
Storage
-40 ... +100 °C
-40 ... +212 °F
-40 ... +100 °C
-40 ... +212 °F
-40 ... +100 °C
-40 ... +212 °F
-40 ... +100 °C
-40 ... +212 °F
Rated temperature range
-20 ... +80 °C / -4 ... +176 °F (actively compensated)
Temperature coefficients within rated tempera
-
ture range (actively compensated)
■
Mean TC of zero
% of span
≤ 0.1 / 10 K
■
Mean TC of span
% of span
≤
0.15 / 10 K
RoHS-conformity
Yes
CE- conformitiy
■
Pressure equipment directive
2014/68/EU
■
EMC directive
2014/30/EU, EN 61326-1 Emission (Group 1, Class B) and interference immunity
(industrial application)
■
ATEX directive of equipment intended for
use in potentially explosive atmospheres
2014/34/EU (for transducer with Ex-marking)
Ex-protection
ATEX
Category 3G (for transducer with Ex-marking)
Ignition protection type
II 3G Ex nA ic IIC T6/T5/T4 Gc X (for transducer with Ex-marking)
Ex-protection
IECEx
Ignition protection type
IECEx BVS 13.0070 X, Ex nA ic IIC T6/T5/T4 Gc
7. Starting, operation
EN
