4-36 | Model 931S / Model 932S UV Analyzers
NOTE
Status (tab)<<HC
Scode>>
Status (tab)<<HC
Scode>>
Heated Acid Gas Sample Probe Temperature Control (Optional)
The Heated Acid Gas Probe operating temperature is monitored and/or
controlled by the analyzer (control available only if the optional Heated
Acid Gas Sample Probe is used). Control is accomplished using an RTD
and heater embedded in the Probe. The Probe temperature measuring
range is from 0 °C to 120 °C.
For systems using an optional Heated Acid Gas Probe, the HAG Probe
temperature Setpoint parameter should normally be set between 0–2 °C
above the maximum process temperature. If the Sample Probe is unheat-
ed, the setpoint will be 0 °C. In this case, the ambient temperature should
be at least 5 °C above the sample dewpoint temperature.
The HAG Probe Too Hot setpoint should be 5 °C to 10 °C above the HAG
Probe Setpoint temperature. The HAG Probe Too Cold setpoint should be
5 °C to 10 °C below the HAG Probe Setpoint temperature.
The HAG Probe temperature setpoints are factory-set, based on ambi-
ent temperature data specific to the application and location.
If the Heated Acid Gas Probe temperature falls below its Too Cold
Setpoint, the “f: Probe temperature too low” alarm will be triggered and
displayed in the software. If its operating temperature exceeds its Too Hot
Setpoint, the “f: Probe temperature too high” alarm will be triggered and
displayed in the software.
The Probe temperature control is protected by an independent over-
temperature circuit, with a trip temperature of 170 °C. The default HAG
Probe temperature Setpoint is factory-set, and is dependent on the stream
temperature. Confirm the HAG Probe Setpoint setting for your system
on the “Analyzer Programming Parameters” sheet (part of the analyzer
Documentation Package).
For unheated Sample Probes (not controlled by the analyzer), if
the sample probe operating temperature falls below its Too Cold
Setpoint or exceeds its Too Hot Setpoint the “w: Probe tempera-
ture too low” alarm will be triggered and displayed in the software.
NOTE
To Next Page
Loading...
