Heraeus Electro-Nite CasTemp Wireless - Appendix 2: Safety Statement

5 June 2020 CasTemp Wireless including CasTemp Superheat Page 19
• The hose and cable system of Qube CTW module will be damaged if the tundish is
moved before disconnection from CasTemp. The hose will part from either module or
sensor contact block at a load of ~ 60kgf. The module could fall if the recommended
mounting system is not used
Although tests results indicate that the severity of the hazards posed by these events is
unlikely to cause harm to personnel wearing appropriate PPE; it is strongly recommended
that the user assesses and minimises the risk of Qube CTW module being exposed to
conditions outside of its designed operating specification.
Operating Specification:
Minimum Temperature
Maximum Temperature
Recommended Operating
Temperature Range
-20
0
C
60
0
C
Maximum Operating
Temperature Range (may
reduce battery lifetime)
-30
0
C
85
0
C
Battery Charging
0
0
C
60
0
C
The sensor contact block has a maximum operating temperature of 200
0
C
The wireless transmission system will not operate at temperatures above 85
0
C
The Qube CTW module must NOT be exposed to temperatures above 85
0
C to avoid risk
of permanent damage to electronics and batteries
Mitigating Safety Features
A range of features to reduce the frequency and severity of failure are encompassed in the design
of Qube CTW module
Primary Safety
• Qube CTW module employs electronic circuitry to protect against short circuits,
overcharging and prevention of charging and operation at temperatures outside of
specification
• The size and capacity of the battery cells has been kept to the minimum required to meet
operational requirements
• Lithium Ferro phosphate battery chemistry is employed due to its inherently more benign
failure modes compared to alternative Li and Li-ion cell chemistries
Secondary safety
• The Qube CTW module is made of robust CNC aluminium which will withstand battery
failure at temperature (at least up to~ 250
0
C), preventing release of particles
• The Qube CTW module vents gases through release of its circumferential seal at
elevated temperature, directing them away from the most likely position of personnel
• Smoke is released before failure. Keep Away.
• No special firefighting precautions are required
• The CTW Qube module poses no significant hazard after failure or when cooled.
Appropriate disposal methods should be followed
• The Qube CTW module hose system will break free from the Qube CTW module or
sensor contact block at a loading ~60kgf in the event of the tundish being lifted away with