WIKA PSD-4-ECO, Operating Instructions Manual

Page: 29 / 140

14247391.01 07/2019 EN/DE/FR/ES
29 WIKA operating instructions, model PSD-4-ECO
EN
Specifications
Switch-on time 1 s
Switching thresholds Switch point 1 and switch point 2 are individually adjustable
Switching functions Normally open, normally closed, window, hysteresis (adjustable)
Switching voltage Power supply - 1 V
Switching current max. 250 mA to 85 °C [176 °F]
max. 250 mA to 70 °C [176 °F] with UL approval
For details, see the derating curves on page 33
Settling time/response time Analogue signal: ≤ 5 ms
Switching output: ≤ 5 ms
Service life 100 million switching cycles
Voltage supply
Power supply
DC 15 ... 32 V
With a current output and a medium temperature of 125 °C [257 °F], only a max. power supply
of DC 28 V is permissible.
The power supply for the pressure sensor must be made via an energy-limited electric circuit in
accordance with section 9.3 of UL/EN/IEC 61010-1 or an LPS to UL/EN/IEC 60950-1 or class
2 in accordance with UL1310/UL1585 (NEC or CEC). The voltage supply must be suitable for
operation above 2,000 m should the pressure sensor be used at this altitude.
Current consumption ≤ 45 mA for versions without output signal
≤ 70 mA for versions with output signal
Total current consumption max. 600 mA including switching current
Accuracy specifications
Accuracy, analogue signal ≤ ±1.0 % of span
Including non-linearity, hysteresis, zero offset and end value deviation (corresponds to
measured error per IEC 61298-2).
Non-repeatability, analogue
signal
≤ 0.1 % of span (IEC 61298-2)
Long-term drift, analogue signal ≤ ±0.1 % of span (IEC 61298-2)
≤ ±0.2 % of span (IEC 61298-2) for measuring ranges ≤ 0.6 bar [10 psi] and for increased
overload safety
9. Specifications