Power-Up and Testing 4-37
To temperature test Heater Tooling and Needle Heaters:
WARNING! The Heaters will be hot and can cause serious injury. Use extreme caution when
measuring Heater temperature and checking connections.
" NOTE This procedure assumes that FmXP is in the Heater Control Window. If not, refer to
Steps
1 through 3 of the previous procedure.
1. Check all air and electrical connections to the heaters.
2. In the Heater Control Window (
Figure 4-24), locate the loops (channels) for the heaters
installed on your system and verify the messages for all the heaters read
OK.
! If the Heater Control Window shows an open loop message (T/C Break), open the
dispensing system hood and recheck all heater connections. Then, close the hood
and repeat this step. If the open loop message still appears, refer to Section 8 -
Troubleshooting.
3. Set the heater temperature to the set point (SP) specified in
Table 4-2.
! Make sure mode column is set to
Auto. If not, the heater may respond inadequately.
Table 4-2 Heater Set Points
Heater Type
Set Point
(°C)
Set Point
(°F)
Impingement and Contact 80 176
Needle 40 104
4. When all loops have been configured, go to the On/Off column and double click on the
gray-shaded icon next to each loop.
! The icon will become yellow and red indicating that it is in the ON state.
5. Wait for the temperature in the present value (PV) column to reach the set point (SP)
temperature.
6. Measure the temperature of the heaters as follows:
a. For heater tooling, use a calibrated temperature probe on the top surfaces of each heater
to verify it is achieving the set point temperature. Read and record temperatures at both
ends and the middle of each Heater.
! The variance in temperature from left end of the heater to the right end should be
±5 °C (±9 °F).
b. For needle heaters, insert a calibrated temperature probe into the fluid-heating chamber of
the dispensing valve.
! The temperature should ramp up and achieve a steady state temperature within ±1 °C
(±1.8 °F) of the set point.
7. Calibrate the heaters as specified in Section 5 - Calibration and Adjustment.
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