Envent Engineering Ltd. Page 37 Revision 2.4
H2S Readings Issues (Cont’d)
Not using the humidifier or
humidifier leaking
A humidifier is not necessary if the sample
gas inlet is already humidified. If the sample
gas inlet is dry, a humidifier must be used.
Make sure the humidifier unit is placed and
installed correctly. Please refer to
"Humidifier Unit" on page 19.
Humidifier Leaking: it needs to either be
repaired or replaced. Consult Envent
Engineering Ltd.
Sensor/ sensor wire failure Re-zero the sensor block. Refer to "Re-zero
Sensor procedure" on page 29.
If procedure fails, sensor or sensor wire
may require replacement.
Dilution Instrument air or
carrier gas flow was increased
(Dilution option only)
If the instrument air or the carrier gas is
increased in flow, the readings will be lower.
Make sure to keep a constant flow and
pressure for the instrument or carrier gas.
Hydrogen flow has been
increased (Total Sulfur option
only)
Lower the hydrogen flow to the specified on
the flow meter.
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