Hach GS1440, Руководство пользователя, Страница: 4 / 542

Table 1 General specifications (continued)
Specification Details
UKEX—GS2440EX
Certificate: ITS22UKEX0506X
II 1 G Ex ia IIC T4 Ga
-20 °C ≤ Ta ≤ +60 °C
IECEx—GS2440EX Certificate: IECEx ETL 22.0003X
Ex ia IIC T4 Ga
Tamb: -20 to +60 °C
North America—GS2440EX Certificate: ETL21CA104799609X
Class I Zone 0 AEx ia IIC T4 Ga
Class I Division 1 Groups A–D T4
Ex ia IIC T4 Ga
Tamb: -20 to +60 °C
Warranty 1 year
Table 2 Performance specifications
Specification Details
Measurement range in water 0 to 5 mg/L H
2
S
Measurement range in air 0 to 1000 ppm H
2
S
Accuracy ± 5% full scale (discrete measurement accuracy, 90-second purge of
1000 ± 20 ppm H
2
S standard after one-point calibration)
Response time (t90) < 30 seconds
Detection limit 1% full scale
Table 3 Interferences
Gas Interference
level
in gas (%)
1
Interference
level
in liquid (%)
2
Gas Interference
level
in gas (%)
1
Interference
level
in liquid
(%)
2
Methane (CH
4
) 0 0 Hydrogen (H
2
) 0.8 96
Carbon dioxide (CO
2
) 0 0 Carbon monoxide (CO) 0.6 77
Nitrogen (N
2
) 0 0 Dimethyl sulfide
((CH
3
)
2
S))
18 18
Oxygen (O
2
) 0 0 Methyl mercaptan
(CH
3
SH)
174 44
Air (O
2
, N
2
, Ar) 0 0 Ethyl mercaptan
(C
2
H
6
S)
13 14
Nitrous oxide (N
2
O) 0 0 Sulfur dioxide (SO
2
) 40 1
Ammonia (NH
3
) 0 0
1
Given as a signal for the interfering species in % of H
2
S signal at equal partial pressures.
2
Given as a signal for the interfering species in % of H
2
S signal at equal molar concentrations.
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