Installation Of Temperature Sensors - Pentair Raychem NGC-20-C-E Guide D'installation, D'utilisation Et De Maintenance

2.3.2 Installation of temperature sensors

2.3.2.1 Temperature sensor of the temperature controller
INDUSTRIAL HEAT TRACING SOLUTIONS
The temperature sensors must be installed in such a way that the sensor(s) measure(s)
the surface temperature as reliable as possible. Therefore the guidelines as described in
section 2.3.2.1 need to be followed.
Important guidelines on sensor positioning and installation:
• The correct position is on top of the pipe. (Figure 2)
• The sensor needs to be attached with sufficient glass tape (GT-66 or GS-54).
• Use two bands of glass tape to ensure its position. (Figure 1)
• The lead wire need to leave the insulation so that no moisture can enter the cladding-
insulation system. (Figure 2)
• Fix the sensor lead wire to prevent accidental strain on the sensor tip, which could
alter its position.
WARNING:
• Do not install sensor at ambient temperatures below –20°C. Do not bend sensor
(last 50 mm), keep it straight under all circumstances. Minimum bending radius for
extension cable: 5 mm.
• No metal straps may be used for fastening, because they could damage the
sensor when tightened. For this reason the use of fibre-glass self-sticking tapes is
recommended.
Figure 5: Mounting temperature sensing on pipe
Sensor
No Pipe
Lead entrace
Figure 6: Sensor and lead entrance
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