Chapter 5
Maintenance and Repair Notes
ITW Dynatec
Dyna BFS Applicator, Rev.9.16
Page 35
5.7 Checking and Replacing the Heater Cartridges and Temperature
Sensor
ADVICE
Heed all security advices given in chapter 5.1.
1. Stop adhesive supply/ all motors.
2. Disconnect the Applicator’s plug from the hose coupling.
3. Calculate the resistance value of heater cartridges {Supply block (1) and Air heater (2)}:
Operation voltage ² of the Applicator (Volt)
Power consumption of the Applicator (Watt)
= Resistance (Ohm)
4. To check the
heater cartridges
, tap the pins 7 and 8 of the connector plug using an
ohmmeter.
Set the ohmmeter to the corresponding resistance range.
Now measure the resistance of the heater cartridge.
Consider a tolerance of ± 20%.
If the value is outside this range, then the heater cartridge must be replaced.
5. To check the
temperature sensor
, tap the pins 5 and 6 of the connector plug using an
ohmmeter.
Consider a tolerance of ± 5%.
If the value is outside this range, then the temperature sensor must be replaced.
The resistance value of the temperature sensor is dependent on the temperature of the
Applicator. In practice, resistance values of 110 - 180 ohms will be measured.
Connector plug
1
Impulse only electric head
2
Impulse only electric head
3
NC
4
NC
5
Pt 100
6
Pt 100
7
Heating
8
Heating
Protective conductor
See the next sections to replace a heater cartridge or a temperature sensor.
