PM7S-342-SD1

PM7S-342-SD1 Suggested applications
  • Temperature sensors for fuser roller surface in copy machines or laser printers
  • Other contact-type temperature sensor applications

    Advantages
  • Soft leaf spring reduces loading on the roller
  • Fast cooling response
  • Widely used--and highly regarded--in black-and-white and color printers


    Shape and dimensions:
    PM7S-342-SD1


    Specifications:
    ResistanceR = 4kΩ ±5% at 200℃
    B constantB = 5014K ±3% (calculated from resistance at 150℃ and 250℃)
    Insulation resistanceOver 100MΩ at 500V DC (when new, between center of heat-sensing section and contact)
    Dielectric strength1000V AC for 1 minute (when new, between center of heat-sensing section and contact)
    Thermal time constantτ= less than 2.0 seconds (to be measured by holding the sensor to the roller with φ25mm OD; roller adjusted to maintain 200℃)
    Thermal dissipation constantσ= 0.6 to 1.0mW/℃ (in still air)
    Operating temperature range-10℃ to +200℃ (top temperature us roller surface temperature, applied only to the heat-sensing section)
    Storage conditionsAt relative humidity of 15 to 85% (there must be no dew or condensate), temperature from -30℃ to 70℃
    Download R/T table for PM7S-342-SD1


    Instructions for handling, installation and use of thermistors
    Please carefully follow these instructions to avoid damage and/or faulty operation of the thermistors:
    1.Carry out reliability tests after sensor is installed; make sure it is performing properly before beginning operations.
    2.When the thermistor is used as a sensor for the control of a device, be sure to incorporate appropriate safety measures to prevent accidents, such as a separate safety circuit or back-up sensor.
    3.The sensor is designed to be used with a fuser roller in normal air; it must not be used in water or in the presence of corrosive gases.
    4.Please consult with Shibaura if the sensor is to be used in applications other than with fuser rollers.
    5.Please consult with Shibaura if the sensor is to be modified in any way.
    6.Carefully handle the thermistor so that the sensor is not scratched or discolored.
    7.Use only within specified operating temperatures.
    8.Do not use where condensation can form.
    9.Do not apply loads of greater than 100g on the sensor section before installation on the roller; this may cause the leaf spring to bend excessively and break the dumet wires.
    10.Do not bend the leaf spring more than 2mm, which can cause deformation.
    11.Thermal dissipation constant is 0.6 to 1.0mW/℃; if this level is applied an error of approximately 1℃ will appear because of the self-heating effect of the thermistor. If a higher level of electric power is applied overrun can occur, a dangerous situation which must be avoided.
    12.No more than 0.6Nm (6kgfcm) torque should be applied to the screw used to install the holder; higher torque may deform or crack the holder. The screw size is M3; the washer used must be flat with no barrel ring.
    13.Inspect leads to make sure there is no rust or dirt present, which can cause poor connections.
    14.When soldering the lead wires, careful ensure that solder or the hot soldering iron do not come in contact with the sensor section.
    15.To avoid deterioration or damage during storage, maintain the specified heat and humidity conditions. Avoid sudden temperature changes, direct sunlight, corrosive gases, dust and dirt or excessive loads; always store as packed.


     
    • Shibaura Electronics Co., Ltd.