19
14063434.02 10/2019 EN/DE
WIKA operating instructions transmitter, models GDT-20, GDHT-20
EN
6. Commissioning, operation
00046
Humidity content
based on weight
ppm
w
-
N
2
-
00048
Relative humidity
rH
%
-
-
The data is available as 32-bit floating-point number (low word first) per IEEE single-precision
32-bit floating-point type, IEEE 754-1985.
6.4.2.6
Configuration
Cross-check the as-delivered condition of the configuration with the delivery note. The factory-
set configuration may differ from the standard described here.
Register
Parameter
Value definition
Standard
Writable
00100
Address
1 ... 247
247
Yes
00101
Baud rate
1,200 ... 115,200
19,200
Yes
00102
Parity
None, Even
None
Yes
00103
Termination
Off, On
Off
Yes
00104
Gas mixture SF₆ [%]
0 ... 100%
100 %
Yes
00105
Gas mixture partner
N2, CF4
N2
Yes
00106
Serial number
Read only
00110
HW version
Read only
00111
SW version
Read only
00112
Model designation
0 = GDT-20
1 = GDHT-20
Read only
00113
Tag number (name of
the transmitter)
16 byte ASCII
Yes
Address
The available address space is 1 ... 247 (247 standard)
Baud rate
The different speeds are presented with register values 0 ... 8.
Baud rate
Register value
1,200
0
2,400
1
4,800
2
9,600
3
14,400
4
19,200
5 (standard)
38,400
6
57,600
7
115,200
8
Parity