ProKiln GAC400
PROBE GAS SAMPLING SYSTEM | OI/GAC400-EN REV. A
17
The process is monitored by the following devices (see
Figure 3
for a detailed drawing):
Monitoring
position
Monitoring device
Purpose
Function
F12
Cooling water flow measurements
• Protects the probe against overheating
• Monitors the cooling water pump for adequate
pump power
• Triggers the retraction program if minimum
cooling water flow is not reached
• Cooling water pump function check
P1
Pressure switch
Ensures adequate compressed-air reserve
Locks various follow up functions
T1
Probe sample tube temperature
Protects probe against condensation build-up
inside
Locks various follow up functions
T2
Probe sample hose temperature
Protects probe against condensation build-up
inside
Locks various follow up functions
T3
Heated sample connection point
temperature
Protects probe against condensation build-up
inside
Locks various follow up functions
T10
Cooling panel water tank temperature • Monitors the cooling water temperature in the
holding tank
• Monitors the efficiency of the water-cooling
unit
• Turns the water-cooling unit fan on/off
• Causes a water-cooling alarm to retract the
probe
• Turns the water-cooling unit tank heat on/off
(optional)
T11
Probe cooling water flow-in
temperature measurement
• Is part of monitoring the process heat input to
the probe
• Protects the probe against overheating
Is used as base temperature for process heat
input
T12
Probe cooling water flow-out
temperature measurement
Is part of monitoring the process heat input to the
probe
• Can cause a water-cooling alarm to retract the
probe
• Is used as the off-set temperature from
process heat input
M1
Probe position reader
• Calibration zero point for encoder position
• Ensures that rear safe end position is reached
• Monitors the probe position
• Monitoring of probe travel time
• Monitor Motor torque
• Provides the reference point for the encoder
• Locks various follow up functions
• Triggers the retraction program if probe travel
time or torque is exceeded
Probe flange
Pos 0
Inductive position indicator flange
shutter in closed position
Ensures the closed flange position is reached
Locks various follow up functions
Probe flange
Pos 1
Inductive position indicator flange
shutter in open position
Ensures the open flange position is reached
Locks various follow up functions
L1
Capacitive water tank level full
Monitors when the water tank full level is reached Turns the water refill valve off
L2
Capacitive water tank level low
Monitors when the water tank low level is reached Turns the water refill valve on
L3
Capacitive water tank level alarm
Monitors when the water tank alarm level is
reached
Causes a water-cooling alarm to retract the probe
