Galvanic Applied Sciences 943-TGXeNA, Operation Manual

Page: 67 / 149

Revision 5 67 August 2021
4.8.4.3 Alarms
The parameters in the red Alarms box are described in Table 16.
Table 16: Alarms Parameters
Parameter Normal
Value
Explanation
Low Cell ≈135°C
Measurement cell fault temperature setpoint. If the cell
temperature falls below this setpoint, a cell temperature fault
will be activated, causing the Status relay to switch to Fault
state and the Control relay to switch to Manual state. The low
cell temperature fault setpoint should be set below the cell
temperature setpoint but still well above the sulfur vapour
condensation temperature of ≈120°C to ens ure that the
analyzer will go into fault before the temperature is low enough
to cause sulfur vapour to condense in the analyzer sample
system. There is a 3°C deadband on this setpoint. If the cell
temperature rises to more than 3°C above this setpoint, and
no other fault conditions exist, the analyzer will then perform a
zero calibration cycle and then return to normal operation.
Low Probe ≈100°C
Probe temperature fault temperature setpoint. If the probe
temperature falls below this setpoint, a probe temperature fault
will be activated, causing the Status relay to switch to Fault
state and the Control relay to switch to Manual state. There is
a 3°C deadband on this setpoint. If the probe temperature
rises to more than 3°C above this setpoint, and no other fault
conditions exist, the analyzer will then perform a zero
calibration cycle and then return to normal operation.
NOTE: This alarm is only active the Control with RTD
function is selected in the Web GUI (refer to section 5.4).
High S
8
Warn
0.5%
Sulfur vapour concentration warning setpoint. If the sulfur
vapour rises above this concentration, a sulfur vapour warning
will be triggered in the analyzer and the Service relay will
switch to the Warning state. Sulfur vapour above this
concentration could start to interfere with the measurement of
H
2
S and SO
2
, causing a decrease in sensitivity.
High S
8
Fault
0.75%
Sulfur vapour concentration fault setpoint. If the sulfur vapour
rises above this concentration, a sulfur vapour fault will be
triggered in the analyzer and the Status relay will switch to
Fault and the Control relay will switch to Manual. This fault can
only be cleared once the sulfur vapour content in the sample
gas drops below the setpoint. Sulfur vapour concentrations
exceeding this setpoint are likely to result in sulfur plugging the
probe and/or analyzer sampling system.