Chapter 7 - System Description
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MNL000535
Revision 1
03/26/2018
BSGS eV / BULKGUARD eV
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Confidential and Proprietary Data
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situation. In extreme cases, low and high PT-2 pressure alarms or shutdowns will occur as liquid
flashes across.
TALL-50 – Source A heat trace low-low temperature alarm. This setpoint is lower than TAL-50 in
order to provide the customer with additional information regarding heat trace operation/health. Its
purpose is to detect a loss of power to the heat trace. Causes include heater element cold section,
tripped GFCB, failed SSR, or incorrect temperature controller setpoint.
TAL-50 – Source A heat trace low temperature alarm. Its purpose is to detect a loss of power to the
heat trace. Causes include heater element cold section, tripped GFCB, failed SSR, or incorrect
temperature controller setpoint.
TAH-50 – Source A heat trace high temperature alarm. Its purpose is to detect an increase in power to
the heat trace. Causes include a failed SSR, or incorrect temperature controller setpoint.
TAHH-50 – Source A heat trace high-high temperature alarm. This setpoint is higher than TAH-50 in
order to provide the customer with additional information regarding heat trace operation/health. Its
purpose is to detect an increase in power to the heat trace. Causes include a failed SSR, or incorrect
temperature controller setpoint.
AI-51
is
Optional
– This is the analog input assigned to the Source B inlet heat trace temperature
monitoring and control thermocouple. There are four alarms associated with heat trace temperature.
Two low alarms and two high alarms. In order to maintain product reliability, all are fault alarms. It
is possible to continue process gas flow with low heat trace temperature, although not an ideal
situation. In extreme cases, low and high PT-2 pressure alarms or shutdowns will occur as liquid
flashes across.
TALL-51 -Source B heat trace low-low temperature alarm. This setpoint is lower than TAL-51 in
order to provide the customer with additional information regarding heat trace operation/health. Its
purpose is to detect a loss of power to the heat trace. Causes include heater element cold section,
tripped GFCB, failed SSR, or incorrect temperature controller setpoint.
TAL-51 – Source B heat trace low temperature alarm. Its purpose is to detect a loss of power to the
heat trace. Causes include heater element cold section, tripped GFCB, failed SSR, or incorrect
temperature controller setpoint.
TAH-51 – Source B heat trace high temperature alarm. Its purpose is to detect an increase in power to
the heat trace. Causes include a failed SSR, or incorrect temperature controller setpoint.
TAHH-51 – Source B heat trace high-high temperature alarm. This setpoint is higher than TAH-51 in
order to provide the customer with additional information regarding heat trace operation/health. Its
purpose is to detect an increase in power to the heat trace. Causes include a failed SSR, or incorrect
temperature controller setpoint.