Operating Instructions
Pressure measurement
CombiPress™
PFMH/N
Fully welded pressure transmitter with touch screen
14. Technical data
Environmental conditions
Power supply and output signal
Operating temperature –40 … 85 °C
Voltage supply range 10 … 35 V DC
Humidity
< 98 % RH, condensing
Current output
4 … 20 mA
20 … 4 mA
4 … 20 mA + HART®
Degree of protection
IP67
IP69K (with appropriate
cable)
Performance specifications
Vibration (sinusoidal)
(IEC 60068-2-6)
1.6 mm p-p (2 … 25 Hz),
4 g (25 … 100 Hz),
1 octave/min.
Accuracy (Linearity,
hysteresis, repeata-
bility)
0.1 % FS@20 °C up to 2:1
turndown
0.25 % FS@20 °C up to
4:1 turndown
Process Conditions
Process temperature
Standard oil:
–40 … 125 °C (< 150 °C
for < 60 min)
NSF H1 listed oil (FDA
approved):
–5 … 125 °C (< 150 °C
for < 60 min)
With cooling neck:
200 °C max.
Temperature drift of
zero point
≤ ±0.005 % FS/°C
Temperature drift of
span
≤ ±0.005 % FS/°C
Long-term drift
0.1 % FS/year
Rise time
(10% ... 90%)
≤ 0.3 s
Sampling interval
≤ 0.3 s
Power-up time
< 10 s
Max. turndown ratio
10:1
Min. measuring span 50 mbar
Measuring ranges and overpressure resistance
Pressure range,
relative [bar]
0 … 0.345
–1 … 1
–1 … 5
–1 … 20
–1 … 34
–1 … 68
–1 … 400
Proof pressure
1
3
15
60
70
135
690
Burst pressure
2
6
30
120
140
270
1350
Pressure range,
absolute [bar]
0 … 1
0 .… 5
0 … 20
0 … 34
0 … 68
0 … 400
Proof pressure
3
15
60
70
135
690
Burst pressure
6
30
120
140
270
1350
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