SYSTEM AND COMPONENT Flashcards
PETK = Power and End Termination Kit
Included in the kits are:
- A power connection boot
- An end termination cap
- RTV (room temperature vulcanizing) adhesive
- A caution label
SCTK = Splice Connection Termination Kit
Included in kits are:
- Two splice connection boots
- Associated wire nuts ( also called marrettes )
- RTV Adhesive
is an area where there is a potentially explosive environment. This
occurs because of the presence of a gas, dust, or flying particulate that can ignite if
certain temperatures are exceeded or a spark is present.
hazardous location
EHT Controllers
TCM2 and TCM18
The TCM2 can control
2 circuits of EHT
The TCM18 can control
18 circuits of EHT
this method uses either 1 or 2 RTDs per circuit that
monitor the exterior temperature of the pipe.
processing sensing
This method uses 1 or 2 RTDs to monitor the
temperature for the entire process area
This method uses 1 or 2 RTDs to monitor the
temperature for the entire process area
ambient sensing
Process sensing Advantages
Accurate
maintenance of
process
temperature
Heater cable sets are only on when they have to be for each line (power consumption
Process sensing Disadvantages
Initial Cost is much more
Higher equipment cost
Design time is longer due to increased control
requirements
Ambient sensing Advantages
•Lower cost initially
Simpler control of
freeze protected
lines
Ambient sensing disavantages
•Less data available for system control
Greater power consumption (entire area is heated up
instead of one circuit)
•
•Single point of failure for entire system
HMI
Human Machine Interface
HMI (Human Machine Interface) that can monitor up to 72 circuits and
allows operators to adjust the temperatures of each zone
Tracenet
Genesis:
HMI (Human Machine Interface) Disadvantage
screen does not work very well in extreme temperatures
