Bionet BM5VET, Руководство по эксплуатации

Страница: 152 / 227

152
BM5Vet Pro User’s Manual
values are set (if applicable for your gas analyzer model) correctly to match the
corresponding calibration gas.
Span calibration can be performed using gases within the ranges:
4.0% ≤ CO
2
≤ 11.0%
45% ≤ O
2
≤ 100% - for ISA Multi-gas with Servomex only
30% ≤ N
2
O ≤ 100% - for ISA Multi-gas only
2.0% ≤ DES ≤ 12.0% - for ISA Multi-gas only
The accuracy of the individual components of the calibration gas mixture shall each
have an accuracy of at least
± 0.03 vol% or ± (0.02 vol% +0.1% of reading), whichever
is greater.
Note : DES shall be used for span calibration of all 5 agents (HAL, ENF, ISO, SEV, DES).
Note: Only perform span calibration for gases that failed in the Gas span check .
1. Warm up the ISA gas analyzer for at least 1 min
2. Send “Pre span calibration zeroing” and make sure that the surrounding gas is normal
air
(21% O
2
and 0% CO
2
).
3. For each gas that failed the Gas span check, perform step 4 to 7. Always perform the
span calibration with the gases in order O
2
, N
2
O, DES and CO
2
Example : Span calibration of O
2
and CO
2
only, start with O
2
then CO
2
.
4. Supply the calibration gas and wait for at least 30 seconds.
5. Send the corresponding span calibration command.
6. Wait until the gas span calibration is no longer in progress. The calibration gas can be
turned off when “ span calibration is in progress" no longer is set, but the O
2
span
calibration continues for about 40 seconds with a special zeroing during which the
Servomex paramagnetic O
2
sensor is sensitive to mechanical movements.