Table 5.8 Maximum Power/Duty Cycle - Emerson Branson LPX Instruction Manual

5.2.9 Maximum Power/Duty Cycle
Table 5.8 Maximum Power/Duty Cycle
Freq/Pwr
Rating
20 kHz @
150W
20 kHz @
550W
30 kHz @
550W
40 kHz @
150W
40 kHz @
550W
Converter performance and reliability can be adversely affected if the converter ceramics
are subjected to temperatures above 140° F (60° C). The converter front driver
temperature should not exceed 122° F (50° C).
To prolong converter life and maintain a high degree of system reliability, the converter
should be cooled with clean, dry, compressed air, particularly if your application calls for
continuous ultrasonic operation. Converter cooling is especially critical in 40 kHz
applications.
Use one of the following procedures to determine if a converter is operating close to the
maximum allowable temperature. Check converter temperature immediately after
substantial machine operation and without power applied to the horn.
• Press a pyrometer probe (or similar temperature measuring device) against the front driver of
the converter assembly. Wait for the probe to reach the temperature of the shell. If the
temperature is 120° F (49° C) or higher, the converter requires a cooling air stream
• If a temperature measuring device is unavailable, use your hand to feel the shell of the converter.
If the converter is hot to touch, the converter requires a cooling air stream
High duty cycles will require additional cooling for the converter (Use Vortec or equivalent
air conditioning systems). The system average power must be limited to the specified
continuous maximum. Higher peak power (to the minimum acceptable power limit) with
the listed on time may be obtained if appropriate off time insures that the average
Continuous Duty Max Power is not exceeded.
100-412-196 REV. 06
Converter
CH, TW 50%
402, 902 100% 10 second on/off
CR, CS, CH, CP 100%
4TR, 4TH, 4TP,
100% 10 second on/off
4TJ
KTJ, KTR, 4C 70%
4TR, 4TH, 4TP,
70%
4TJ
Max. Power
With Cooling
10 second on/off 75 W
250 W
2 second on/off 250 W
150 W
10 second on/off 150 W
10 second on/off 250 W
Max. Power
Continuous With
Cooling
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