Measured parameters - OPT100

OPT100 User Guide

Document code
M211858EN
Revision
N
Language
English (United States)
Product
OPT100
Document type
User guide
Table 1. Measured parameters
Parameter Output unit(s) Description
Methane (CH4) ppmv Measured from extracted gas
Ethane (C2H6) ppmv Measured from extracted gas
Ethylene (C2H4) ppmv Measured from extracted gas
Acetylene (C2H2) ppmv Measured from extracted gas
Carbon monoxide (CO) ppmv Measured from extracted gas
Carbon dioxide (CO2) ppmv Measured from extracted gas
Hydrogen (H2) ppmv Measured in-oil
Moisture (H2O) ppmw and %RS  Measured in-oil as relative saturation (%RS). See Calculating relative moisture saturation inside transformer.
Total gas pressure hPa and psi Measured from the sampled oil volume
Table 2. Calculated parameters
Property Output unit(s) Description
Total dissolved combustible gases (TDCG) ppmv Combined total of H2, CO, CH4, C2H6, C2H4, and C2H2.
24 h average

ppmv for gases

ppmw for moisture

hPa and psi for total gas pressure

Available for single gases, moisture, TDCG, and total gas pressure
Rate of change (ROC) ppmv Available for single gases and TDCG for 24 h, 7 d, and 30 d periods
Gas ratios for:
  • CH4/H2
  • C2H2/C2H4
  • C2H2/CH4
  • C2H6/C2H2
  • C2H4/C2H6
  • CO2/CO
Ratio Ratio is calculated from 24 h average values of the gases