Measurement data registers

Table 1. Measurement data registers (read-only)
Register number	Address	Register description	Data format	Unit and notes
Present values
21	0014_hex	Methane	32-bit float	ppm_v
21	0015_hex	Methane	32-bit float	ppm_v
23	0016_hex	Acetylene	32-bit float	ppm_v
23	0017_hex	Acetylene	32-bit float	ppm_v
25	0018_hex	Ethylene	32-bit float	ppm_v
25	0019_hex	Ethylene	32-bit float	ppm_v
27	001A_hex	Ethane	32-bit float	ppm_v
27	001B_hex	Ethane	32-bit float	ppm_v
29	001C_hex	Carbon monoxide	32-bit float	ppm_v
29	001D_hex	Carbon monoxide	32-bit float	ppm_v
31	001E_hex	Carbon dioxide	32-bit float	ppm_v
31	001F_hex	Carbon dioxide	32-bit float	ppm_v
33	0020_hex	Total dissolved combustible gases (TDCG)	32-bit float	ppm_v
33	0021_hex	Total dissolved combustible gases (TDCG)	32-bit float	ppm_v
35	0022_hex	Hydrogen	32-bit float	ppm_v
35	0023_hex	Hydrogen	32-bit float	ppm_v
37	0024_hex	Moisture in oil	32-bit float	ppm_w
37	0025_hex	Moisture in oil	32-bit float	ppm_w
39	0026_hex	Temperature of in-oil measurement chamber	32-bit float	°C
39	0027_hex	Temperature of in-oil measurement chamber	32-bit float	°C
41	0028_hex	Relative moisture in oil See Calculating relative moisture saturation inside transformer	32-bit float	%RS
41	0029_hex		32-bit float	%RS
43	002A_hex	Total gas pressure (TGP)	32-bit float	hPa
43	002B_hex	Total gas pressure (TGP)	32-bit float	hPa
24 hour average values
51	0032_hex	Methane	32-bit float	ppm_v
51	0033_hex	Methane	32-bit float	ppm_v
53	0034_hex	Acetylene	32-bit float	ppm_v
53	0035_hex	Acetylene	32-bit float	ppm_v
55	0036_hex	Ethylene	32-bit float	ppm_v
55	0037_hex	Ethylene	32-bit float	ppm_v
57	0038_hex	Ethane	32-bit float	ppm_v
57	0039_hex	Ethane	32-bit float	ppm_v
59	003A_hex	Carbon monoxide	32-bit float	ppm_v
59	003B_hex	Carbon monoxide	32-bit float	ppm_v
61	003C_hex	Carbon dioxide	32-bit float	ppm_v
61	003D_hex	Carbon dioxide	32-bit float	ppm_v
63	003E_hex	Total dissolved combustible gases (TDCG)	32-bit float	ppm_v
63	003F_hex	Total dissolved combustible gases (TDCG)	32-bit float	ppm_v
65	0040_hex	Hydrogen	32-bit float	ppm_v
65	0041_hex	Hydrogen	32-bit float	ppm_v
67	0042_hex	Moisture in oil	32-bit float	ppm_w
67	0043_hex	Moisture in oil	32-bit float	ppm_w
69	0044_hex	Total gas pressure (TGP)	32-bit float	hPa
69	0045_hex	Total gas pressure (TGP)	32-bit float	hPa
Rate of change (ROC), 24 hour
81	0050_hex	Methane	32-bit float	ppm_v/d
81	0051_hex	Methane	32-bit float	ppm_v/d
83	0052_hex	Acetylene	32-bit float	ppm_v/d
83	0053_hex	Acetylene	32-bit float	ppm_v/d
85	0054_hex	Ethylene	32-bit float	ppm_v/d
85	0055_hex	Ethylene	32-bit float	ppm_v/d
87	0056_hex	Ethane	32-bit float	ppm_v/d
87	0057_hex	Ethane	32-bit float	ppm_v/d
89	0058_hex	Carbon monoxide	32-bit float	ppm_v/d
89	0059_hex	Carbon monoxide	32-bit float	ppm_v/d
91	005A_hex	Carbon dioxide	32-bit float	ppm_v/d
91	005B_hex	Carbon dioxide	32-bit float	ppm_v/d
93	005C_hex	Total dissolved combustible gases (TDCG)	32-bit float	ppm_v/d
93	005D_hex	Total dissolved combustible gases (TDCG)	32-bit float	ppm_v/d
95	005E_hex	Hydrogen	32-bit float	ppm_v/d
95	005F_hex	Hydrogen	32-bit float	ppm_v/d
Rate of change (ROC), 7 days
101	0064_hex	Methane	32-bit float	ppm_v/w
101	0065_hex	Methane	32-bit float	ppm_v/w
103	0066_hex	Acetylene	32-bit float	ppm_v/w
103	0067_hex	Acetylene	32-bit float	ppm_v/w
105	0068_hex	Ethylene	32-bit float	ppm_v/w
105	0069_hex	Ethylene	32-bit float	ppm_v/w
107	006A_hex	Ethane	32-bit float	ppm_v/w
107	006B_hex	Ethane	32-bit float	ppm_v/w
109	006C_hex	Carbon monoxide	32-bit float	ppm_v/w
109	006D_hex	Carbon monoxide	32-bit float	ppm_v/w
111	006E_hex	Carbon dioxide	32-bit float	ppm_v/w
111	006F_hex	Carbon dioxide	32-bit float	ppm_v/w
113	0070_hex	Total dissolved combustible gases (TDCG)	32-bit float	ppm_v/w
113	0071_hex	Total dissolved combustible gases (TDCG)	32-bit float	ppm_v/w
115	0072_hex	Hydrogen	32-bit float	ppm_v/w
115	0073_hex	Hydrogen	32-bit float	ppm_v/w
Rate of change (ROC), 30 days
121	0078_hex	Methane	32-bit float	ppm_v/m
121	0079_hex	Methane	32-bit float	ppm_v/m
123	007A_hex	Acetylene	32-bit float	ppm_v/m
123	007B_hex	Acetylene	32-bit float	ppm_v/m
125	007C_hex	Ethylene	32-bit float	ppm_v/m
125	007D_hex	Ethylene	32-bit float	ppm_v/m
127	007E_hex	Ethane	32-bit float	ppm_v/m
127	007F_hex	Ethane	32-bit float	ppm_v/m
129	0080_hex	Carbon monoxide	32-bit float	ppm_v/m
129	0081_hex	Carbon monoxide	32-bit float	ppm_v/m
131	0082_hex	Carbon dioxide	32-bit float	ppm_v/m
131	0083_hex	Carbon dioxide	32-bit float	ppm_v/m
133	0084_hex	Total dissolved combustible gases (TDCG)	32-bit float	ppm_v/m
133	0085_hex	Total dissolved combustible gases (TDCG)	32-bit float	ppm_v/m
135	0086_hex	Hydrogen	32-bit float	ppm_v/m
135	0087_hex	Hydrogen	32-bit float	ppm_v/m
Gas ratios (24 hour average values)
141	008C_hex	CH₄/H₂	32-bit float	-
141	008D_hex	CH₄/H₂	32-bit float	-
143	008E_hex	C₂H₂/C₂H₄	32-bit float	-
143	008F_hex	C₂H₂/C₂H₄	32-bit float	-
145	0090_hex	C₂H₂/CH₄	32-bit float	-
145	0091_hex	C₂H₂/CH₄	32-bit float	-
147	0092_hex	C₂H₆/C₂H₂	32-bit float	-
147	0093_hex	C₂H₆/C₂H₂	32-bit float	-
149	0094_hex	C₂H₄/C₂H₆	32-bit float	-
149	0095_hex	C₂H₄/C₂H₆	32-bit float	-
151	0096_hex	CO₂/CO	32-bit float	-
151	0097_hex	CO₂/CO	32-bit float	-
Other
161	00A0_hex	Time stamp of measurement result set, in seconds since start of Unix epoch	64-bit float (double)	s
	00A1_hex
	00A2_hex
	00A3_hex
165	00A4_hex	Index of measurement result set	32-bit integer	-
165	00A5_hex	Index of measurement result set	32-bit integer	-
Custom averages
171	00AA_hex	Methane	32-bit float	ppm_v
171	00AB_hex	Methane	32-bit float	ppm_v
173	00AC_hex	Acetylene	32-bit float	ppm_v
173	00AD_hex	Acetylene	32-bit float	ppm_v
175	00AE_hex	Ethylene	32-bit float	ppm_v
175	00AF_hex	Ethylene	32-bit float	ppm_v
177	00B0_hex	Ethane	32-bit float	ppm_v
177	00B1_hex	Ethane	32-bit float	ppm_v
179	00B2_hex	Carbon monoxide	32-bit float	ppm_v
179	00B3_hex	Carbon monoxide	32-bit float	ppm_v
181	00B4_hex	Carbon dioxide	32-bit float	ppm_v
181	00B5_hex	Carbon dioxide	32-bit float	ppm_v
183	00B6_hex	Total dissolved combustible gases (TDCG)	32-bit float	ppm_v
183	00B7_hex	Total dissolved combustible gases (TDCG)	32-bit float	ppm_v
185	00B8_hex	Hydrogen	32-bit float	ppm_v
185	00B9_hex	Hydrogen	32-bit float	ppm_v
187	00BA_hex	Moisture in oil	32-bit float	ppm_w
187	00BB_hex	Moisture in oil	32-bit float	ppm_w
Present values as 16-bit signed integer
221	00DC_hex	Methane	16-bit signed integer	ppm_v
222	00DD_hex	Acetylene	16-bit signed integer	ppm_v
223	00DE_hex	Ethylene	16-bit signed integer	ppm_v
224	00DF_hex	Ethane	16-bit signed integer	ppm_v
225	00E0_hex	Carbon monoxide	16-bit signed integer	ppm_v
226	00E1_hex	Carbon dioxide	16-bit signed integer	ppm_v
227	00E2_hex	Total dissolved combustible gases (TDCG)	16-bit signed integer	ppm_v
228	00E3_hex	Hydrogen	16-bit signed integer	ppm_v
229	00E4_hex	Moisture in oil	16-bit signed integer	ppm_w*10
230	00E5_hex	Temperature of in-oil measurement chamber	16-bit signed integer	°C*10
231	00E6_hex	Relative moisture in oil	16-bit signed integer	%RS*10
232	00E7_hex	Total gas pressure (TGP)	16-bit signed integer	hPa

Measurement data registers - OPT100

OPT100 User Guide