Maintenance Instructions; Specifications - WIKA HYDRA-Dry Betriebsanleitung

Pressure Transducer
HYDRA-Dry

6. Maintenance instructions

GB
HYDRA-Dry pressure measuring systems do not require any maintenance.
Cleaning of the HYDRA-Dry may only be accomplished through rinsing. Any
mechanical cleaning inside the process connection may damage the
separating diaphragms.
The HYDRA double diaphragm system prevents contamination of the process
media even in case of mechanical damage of the wetted diaphragm. In this
case the process media will penetrate the lateral leakage boring. The
instrument must be exchanged as soon as possible.
For safety reasons repairs of already mounted instruments are not possible.

7. Specifications

Specifications
Pressure ranges
Overpressure safety of sensor
Pressure-reference
Wetted parts
Power supply U B
Signal output
Maximum load R
A
Accuracy
Stability per year
Temperature-coefficients
Ingress protection
1) Limited by maximum pressure rating of the process connection see section 3.
6
bar 0 ... 2.5
psi 0 ... 30
1)
bar
40
relative pressure, not suitable for vacuum
PFA or TFM (modified PTFE), no transfer-fluid
≤ 30 (18 ... 30 V with HYDRA-Indicator)
12 <
VDC U B
mA 4 ... 20, 2-wire system
≤ (U
R 12 V) / 0.027 A
B -
A
(with HYDRA-Indicator R
≤ 0.5
% of span
≤ 0.25
% of span (at reference conditions)
≤ 0.25 (from 5°C to 60°C)
% of span / 10 K
IP 67
WIKA Operating Instructions HYDRA-Dry
0 ... 4 0 ... 6
0 ... 60 0 ... 100
with R in Ohm and U B in Volt
A
≤ (U B - 18 V) / 0.027 A)
A