Page 366 - Bürkert

Technical Data (continued)
Type 8137 8138 Type 8137 8138
Electrical Specifications Specifications Ex
Operating voltage 14 - 36 V DC or 14 - 30 V DC (Ex ia instrument) - Protection Categories 1/2G or 2G
Permissible residual < 100 Hz: Uss < 1 V EEx ia IIC T6
ripple 100 Hz... 10 kHz: Uss < 10 mV - Certification
Output signal 4... 20 mA/HART Conformity
specifications 1)
Resolution 1.6 μA
Operating voltage Ui 30 V
Fault signal current output unchanged 20.5 mA, 22 mA or Short circuit rating li 131 mA
< 3.6 mA (selectable) Power limitation Pi 983 mW 8137 / 8138
Current limitation 22 mA Ambient temperature -40 to +55 °C (depending on the category)
Load see load diagram Internal capacity Ci negligible
Internal inductivity Li negligible
Damping (63% of the 0... 999 s, adjustable
input variable) 1) homologation certificate PTB 08 ATEX 2002X
Standards and approvals
Protection IP66 / IP67 with mounted and tightened cable gland
M20 x 1.5 Option
Overvoltage category III • Other hygienic fittings
Protection class II
Standard
EMV EN61326 EN61326
Security EN61010-1 EN61010-1
NAMUR NE 21; NE 43 NE 21; NE 43
1)
1)
Approvals ATEX : EN60079-0; ATEX : EN60079-0;
EN60079-11; EN60079-11;
EN60079-26 EN60079-26
FDA
Accuracy diagram

Type 8137 Type 8138
10 mm 10 mm

2 mm 2 mm
-2 mm -2 mm
0.5 m 10 m 0.5 m 20 m
-10 mm -10 mm }
Dead zone Dead zone
}

Load diagram

1000
750
3
500
1 2
250
4
14 16 18 20 22 24 26 28 30 32 34 36 V
1 HART load
2 Voltage limit Ex ia instrument
3 Voltage limit non-Ex instrument
4 Operating voltage

365