PBI Dansensor SGI-3 - Connecting and Starting Up the Device; Device Start-up Procedure; Measuring Gas Connection

3. Connection of the SGI-3, OXI-3 and OXI-3.1
3.1. Start-up
Connect the device to a 230 VAC (115 VAC) grounded power outlet using the supplied
mains cable.
When voltage is connected, the green “Power” LED lights up.
After a warm-up period of approx. 20 minutes, the green “Ready” LED will light up. The
device is now ready for use.
If the device is disconnected briefly, the subsequent warm-up period will be substantially
shorter (but not less than 3 minutes).
3.2. Connection of measuring gas
It is important to ensure that the measuring system is tight and to use oxygen
diffusion-proof hoses and fittings.
Not all hose materials are well suited. We recommend the use of the PBI-Dansensor A/S
measuring gas hose and the special shielding gas hose with accessory fittings.
Connect the measuring gas to the upper screwed connection ("GAS IN"). It is important to
use PBI-Dansensor A/S oxygen diffusion-proof hoses and to tighten the union carefully.
Use the "RANGE" push-button (SGI-3 and OXI-3 only) to select the gas to measure:
SGI-3: "Inert", "Formier 10 %", "Formier 5 %" and "Formier 2 %".
OXI-3: "%" and "ppm"
OXI-3.1: "%" and "ppm" (selected by means of external control voltage via
connector)
"%" used for inert gases in the percentage range.
"ppm" used for inert gases in the ppm range.
"
Inert" used for inert gases such as argon (Ar),
nitrogen (N
2
), carbon dioxide (CO
2
), helium (He), and
mixed gases consisting of these constituents and oxygen (O
2
).
"
Formier 10 %" used for gases with a reducing effect, such as
formier gas containing hydrogen (H
2
) 10% H
2
that is mixed
with either nitrogen (N
2
) or argon (Ar).
"Formier 5 %" used for a corresponding hydrogen mixture of 5 % H
2
.
"Formier 2 %" used for a corresponding hydrogen mixture of 2 % H
2
.
When measuring formier gas mixtures with other concentration levels, select the
measuring range closest to the gas concentration.
Danger: Under certain circumstances, mixture ratios with a hydrogen (H
2
hydrogen)
content exceeding 6% can be explosive in combination with atmospheric air.
SGI-3/OXI-3/OXI-3.1 User manual PBI-Dansensor A/S
PBI-210247-H UK 07/11/2005 7