48
10 Supplement
WIKA Operating Instructions - Process pressure transmitter IPT-1*
Protection rating
Ʋ
unassembled
IP 20
Ʋ
mounted into the sensor without cover IP 40
Material
Ʋ
Housing
ABS
Ʋ
Inspection window
Polyester foil
Voltage supply
Operating voltage
Ʋ Non-Ex instrument
14 … 36 V DC
Ʋ
Ex ia instrument
14 … 30 V DC
Ʋ
Ex-d instrument
18 … 36 V DC
Operating voltage with illuminated display and adjustment module
Ʋ Non-Ex instrument
20 … 36 V DC
Ʋ
Ex ia instrument
20 … 30 V DC
Ʋ
Ex-d instrument
20 … 36 V DC
Permissible residual ripple
Ʋ
< 100 Hz
U
ss
< 1 V
Ʋ
100 Hz … 10 kHz
U
ss
< 10 mV
Load
see diagram
1000
750
500
250
14
18
16
20
22
24
26
28
30
32
34
36
Ω
V
4
1
2
3
Fig. 25: Voltage diagram
1 HART load
2 Voltage limit Ex-ia instrument
3 Voltage limit non-Ex/Ex-d instrument
4 Operating voltage
Electrical protective measures
Protection rating
Ʋ
Housing, standard
IP 66/IP 67
22)
Ʋ
Process component in IP 68 version IP 68 (25 bar)
22)
Instruments with gauge pressure measuring ranges cannot detect the ambient pressure when submerged, e.g.
in water. This can lead to falsification of the measured value.