Vaisala Optimus OPT100 - Measured Parameters

2.3 Measured parameters
Table 4 Measured parameters
Parameter Output unit(s) Description
Methane (CH
4
) ppm
v
Measured from extracted gas
Ethane (C
2
H
6
) ppm
v
Measured from extracted gas
Ethylene (C
2
H
4
) ppm
v
Measured from extracted gas
Acetylene (C
2
H
2
) ppm
v
Measured from extracted gas
Carbon monoxide (CO) ppm
v
Measured from extracted gas
Carbon dioxide (CO
2
) ppm
v
Measured from extracted gas
Hydrogen (H
2
) ppm
v
Measured in-oil
Moisture (H
2
O) ppm
w
and %RS Measured in-oil as relative
saturation (%RS). See
Calculating relative moisture
saturation inside transformer
(page 14).
Total gas pressure hPa and psi Measured from the sampled oil
volume
Table 5 Calculated parameters
Property Output unit(s) Description
Total dissolved combustible
gases (TDCG)
ppm
v
Combined total of H
2
, CO, CH
4
, C
2
H
6
, C
2
H
4
, and
C
2
H
2
.
24 h average ppm
v
for
gases
ppm
w
for
moisture
hPa and psi for
total gas
pressure
Available for single gases, moisture, TDCG, and
total gas pressure
Rate of change (ROC) ppm
v
Available for single gases and TDCG for 24 h,
7 d, and 30 d periods
Chapter 2 – Product overview
13