Deltabar S
18 Endress+Hauser
Total performance –
PMD 75
The "Total performance" specification comprises the non-linearity including hysteresis, non-reproducibility, the
thermal change of the zero point as well as the influence of the line pressure (p
st
= 1015 psi / 70 bar).
• ±0.15% of URV
1, 2
Warm-up period –
PMD 75, FMD 77, FMD 78
5.4 s
Dynamic response time (T63) –
PMD 75, FMD 77, FMD 78
P01-xxxxxxxx-05-xx-xx-xx-007
Dynamic response time
Influence of the operating
pressure on zero point and span
– PMD 75, FMD 77, FMD 78
Note!
The influence of the operating pressure on the zero point can be calibrated out.
1. For measuring ranges ≥ 200 inH
2
O (500 mbar) to TD 2:1
2. All specifications apply to the temperature range +14 to +140°F (–10 to +60°C).
I
63 %
100 %
t
t
1
t
2
Type Dead time t
1
Time constant (T63), t
2
PMD 75 45 ms • 12 inH
2
O (30 mbar) measuring cell: 200 ms
• 40 inH
2
O (100 mbar) measuring cell: 60 ms
• 200 inH
2
O (500 mbar) measuring cell: 45 ms
• 43 psi (3 bar) measuring cell: 40 ms
FMD 77, FMD 78 dependent on the diaphragm seal
Measuring cell 4 inH
2
O (10 mbar) 12 inH
2
O (30 mbar) 40 inH
2
O (100 mbar) 200 inH
2
O (500 mbar)
Influence of the
operating pressure
on the zero point
±0.15% of URL/
100 psi (7 bar)
±0.35% of URL/
1015 psi (70 bar)
±0.15% of URL/
1015 psi (70 bar)
±0.075% of URL/
1015 psi (70 bar)
Influence of the
operating pressure
on the span
±0.035% of URL/
100 psi (7 bar)
±0.14% of URL/
1015 psi (70 bar)
±0.14% of URL/
1015 psi (70 bar)
±0.14% of URL/
1015 psi (70 bar)
Measuring cell 45 psi (3 bar) 230 psi (16 bar) 600 psi (40 bar)
Influence of the
operating pressure on
the zero point
±0.075% of URL/
1015 psi (70 bar)
±0.075% of URL/
1015 psi (70 bar)
±0.075% of URL/
1015 psi (70 bar)
Influence of the
operating pressure on
the span
±0.14% of URL/
1015 psi (70 bar)
±0.14% of URL/
1015 psi (70 bar)
±0.14% of URL/
1015 psi (70 bar)
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