Siemens SITRANS P - Manual (Page 18)

SITRANS P measuring instruments for pressure
Transmitters for gage, absolute and differential pressure
ZD series for gage and absolute pressure
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• Upper and lower current saturation limit
• Electrical damping
The other two keys are used to set the values in the individual op-
erating modes.
Two LED indicators are fitted above the display to monitor the set
range and the status.
The green LED signals that the measured pressure lies within the
set limits. The red LED lights up when the measured pressure
lies outside the set limits and when there is an error.
■
Technical specifications
SITRANS P pressure transmitters, ZD series
Mode of operation
Measuring principle Thin-film strain gage
Input
Measured variable Gage and absolute pressure
Measured range Resolution
0 ... 2 bar (0 ... 29 psi) 0.6 mbar (0.008 psi)
0 ... 10 bar (0 ... 145 psi) 3 mbar (0.044 psi)
0 ... 50 bar (0 ... 725 psi) 15 mbar (0.218 psi)
0 ... 200 bar (0 ... 2900 psi) 60 mbar (0.9 psi)
0 ... 400 bar (0 ... 5800 psi) 120 mbar (1.8 psi)
Measured range Overload limit
0 ... 2 bar (0 ... 29 psi) 5 bar (72.5 psi)
0 ... 10 bar (0 ... 145 psi) 25 bar (363 psi)
0 ... 50 bar (0 ... 725 psi) 120 bar (1740 psi)
0 ... 200 bar (0 ... 2900 psi) 500 bar (7250 psi)
0 ... 400 bar (0 ... 5800 psi) 600 bar (8700 psi)
Range adjustment (turndown) 5:1
Output
Output signal 4 ... 20 mA
Lower current limit min. 3.6 mA
Upper current limit max. 23 mA
Output protected against Reversed polarity, overvoltage
and short-circuiting
Max. load R
B
= (U
H
- 12 V) / 0.023 A
Voltage measurement Linear rising
Measuring accuracy To EN 60770-1
Error in measurement (including
non-linearity, hysteresis and repeat-
ability, at 25 °C (77 °F)) < 0.25% of full-scale value (typi-
cal), max. 0.5%
Adjustment time < 100 ms
Long-term drift 0.25% of full scale value/year
Influence of ambient temperature < ±0.25%/10 K (< ±0.25%/10 K)
of full-scale value
Vibration influence 0.05%/g to 500 Hz in all directions
(to IEC 68-2-64)
Power supply effect < ±0.01%/V of full-scale value
Rated conditions
Ambient conditions
• Ambient temperature -25 ... +85 °C (-13 ... +185 °F)
• Storage temperature -40 ... +85 °C (-40 ... +185 °F)
Medium conditions
• Process temperature -30 ... +100 °C (-22 ... +212 °F)
Degree of protection IP65 to EN 60529
Electromagnetic compatibility
• Emitted interference and interfer-
ence immunity
To EN 61326/A1 appendix A
(1998)
Displays and controls
Display LCD, max. 5 digits, digit height
9 mm
Decimal point Freely parameterizable
Limit values Freely parameterizable
Limit violation display Red LED and message on LCD
(
↑ symbol /↓ symbol in case of
limit violation in upward / down-
ward direction)
Parameterization With 3 keys
Units mA or % or physical variable
(default setting: bar)
Other dimensions: mbar, kPa,
MPa, mmH
2
0, mH
2
0, psi, inH
2
0,
mmHg, kg/cm², torr, atm
Damping
Between 0.1 and 100 s
(increment: 0.1 s) freely parame-
terizable
Design
Weight ≈0.6 kg (≈1.32 lb)
Electrical connection Using 2-pole plug connector with
M16x1.5-Cable inlet to
EN 175301-803A, plastic
Process connection • Male thread G½B and female
thread G 1 /
8
B
• G½B to EN 837-1
• Female thread: ½-14 NPT
Version of housing/process connec-
tion • Radial (type A), can be swiveled
by max. ±120° (α)
• Axial (type B), can be swiveled
by max. ±360°
Material
Non-wetted parts materials
• Field housing Ø 80 mm (3.15 inch), stainless
steel mat. No. 1.4016
• Cover Stainless steel, mat. No. 1.4016
with glass
Wetted parts materials
• Measuring cell Al
2
O
3
• Gasket Viton
• Process connection Stainless steel, mat. No.
1.4571/316Ti
Power supply
Terminal voltage on pressure trans-
mitter (U
H
)
12 ... 30 V DC
Certificate and approvals
Classification according to pressure
equipment directive 97/23/EC For gases of fluid group 1 and liq-
uids of fluid 1; complies with
requirements of article 3, para-
graph 3 (sound engineering prac-
tice)
© Siemens AG 2008