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5. Commissioning, operation
Model GDHT-20
Address
Register
00040
00041
00042
00043
00044
00045
00046
00047
00048
00049
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.
5.4.2.6 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.
Address
Register
00100
00101
00101
00102
00102
00103
00103
00104
00106
00107
00110
00111
00111
00112
00112
00113
00113
00114
00160
00161
00161
00162
00162
00163
00163
00164
00164
00165
00165
00166
00166
00167
00167
00168
WIKA operating instructions transmitter, models GDT-20 and GDHT-20
Measurand
Humidity content
based on volume
Humidity content
based on weight
Humidity content
based on volume
Humidity content
based on weight
Relative humidity
Parameter
Value definition Standard Writable
Address
1 ... 247
Baud rate
1,200 ... 115,200
Parity
None, even
Termination
Off, On
Serial number
HW version
SW version
Model designation
0 = GDT-20
1 = GDHT-20
TAG number (name
16 byte ASCII
of the transmitter)
Gas proportion SF₆
0 ... 100 %
Gas proportion N₂
0 ... 100 %
Gas proportion CF₄
0 ... 100 %
Gas proportion O₂
0 ... 100 %
Gas proportion CO₂
0 ... 100 %
Gas proportion
0 ... 100 %
3M™ Novec™ 4710
Gas proportion He
0 ... 100 %
Gas proportion Ar
0 ... 100 %
Unit
Reference
gas
ppm
-
SF
v
6
ppm
-
SF
w
6
ppm
-
N
v
2
ppm
-
N
w
2
rH
%
-
247
19,200
None
Off
100 %
0 %
0 %
0 %
0 %
0 %
0 %
0 %
Based on
EN
-
-
-
-
-
Yes
Yes
Yes
Yes
Read only
Read only
Read only
Read only
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
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