Wika Hydra-Dry Manual de usuario descargar pdf (Pagina 6)

9016333 06/2007

6 WIKA Operating Instructions HYDRA-Dry

Pressure Transducer

HYDRA-Dry

6. Maintenance instructions

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

1) Limited by maximum pressure rating of the process connection see section 3.

Specifications

Pressure ranges bar 0 ... 2.5 0 ... 4 0 ... 6

psi 0 ... 30 0 ... 60 0 ... 100

Overpressure safety of sensor bar

Pressure-reference relative pressure, not suitable for vacuum

 Wetted parts PFA or TFM (modified PTFE), no transfer-fluid

Power supply U

VDC

12 < U

≤ 30 (18 ... 30 V with HYDRA-Indicator)

Signal output mA 4 ... 20, 2-wire system

Maximum load R

≤ (U

- 12 V) / 0.027 A with R

in Ohm and U

in Volt

(with HYDRA-Indicator R

≤ (U

- 18 V) / 0.027 A)

Accuracy % of span

≤ 0.5

Stability per year % of span

≤ 0.25 (at reference conditions)

Temperature-coefficients

% of span / 10 K

≤ 0.25 (from 5°C to 60°C)

Ingress protection

IP 67

1 2 3 4 5 6 7 8 9 10 11 12

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Wika Hydra-Dry Manual de usuario Pagina 6

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