Tempscan Heat Sensor Switch Model CD/HX-SS

Description

Bulletin 100.031

Belt Sideslip Switch
Surface Over-temperature Detection

The CD/HX-SS contains a reed switch operated temperature switch which functions by the following two principles:

A reed switch actuation occurs because of changes in strength of magnetic field in the vicinity of the contact gap within the unit.
Certain materials within the switch exhibit great changes in magnetic reluctance when the temperature is varied in the vicinity of the materials Curie point or Curie temperature: Temperature in which a magnetic materials’ ability to conduct magnetic flux is severely reduced.

Therefore, when the heat applied to the device exceeds its designed set-point, the magnets in the switch lose their ability to “hold” the reed switch in the normal state.

When a moving belt rubs against the sensing surface, the temperature rises causing the internal switch to activate.

Specifications

Switch Enclosure: Cast Brass, Copper Alloy 865 Manganese Bronze.
Temperature Set-point: Nominally 45ºC, (113ºF)
Contact Arrangement: SPST Form A (N.O.) or Form B (N.C.)
Maximum Voltage: 24VDC/120VAC Maximum Power: 12VA
Maximum Current: 0.5A
Tolerance: ± 5ºC
Temperature Set-points Available: 0-115ºC in increments of 5ºC

Installation

Unit comes complete with 2.13M (7’-0”) of #16/3 type sow cable. Locate switch opening in casing as indicated in Front Elevation View Drawing: E-122. Cut out 3.06” x 1.06” opening in casing and fasten switch by drilling 6: 0.20” diameter holes and fasten with 0.1875” pop rivets as provided. It is recommended that two opposite corner holes be fastened first, then the balance to be drilled and fastened.

Caution

The internal switch within this unit is activated by temperature rise generated by belt friction, do not install this unit prior to the alarm system being confirmed operational.

After an alarm condition, check functioning of the internal switch by confirming its operating temperature (see label for operating temperature). Place unit in upright position, immerse to mid-point in hot water at least 10ºC (18ºF) higher than indicated operating temperature.

Additional information

Switch Enclosure	Cast Brass, Copper Alloy 865 Manganese Bronze
Temperature Set-point	Nominally 45ºC, (113ºF)
Contact Arrangement	SPST Form A (N.O.) or Form B (N.C.)
Maximum Voltage	24VDC/120VAC
Maximum Power	12VA
Maximum Current	0.5A
Tolerance	± 5ºC
Temperature Set-points Available	0-115ºC in increments of 5ºC