Ambrell 3542, Manual

Page: 36 / 75

How Your E
ASY
H
EAT
Works 36
Precision Induction Heating
A
MBRELL
®
Doc#801-9526-00.doc
2
2
.
.
6
6
C
C
a
a
l
l
i
i
b
b
r
r
a
a
t
t
i
i
o
o
n
n
Your E
ASY
H
EAT
system has been calibrated by our test facilities; this means that the
displayed output level accurately represents the rms current circulating through the RF
coil.
If you have recurring calibration requirements for your E
ASY
H
EAT
equipment, we offer
this calibration service:

return the power supply to us for us to perform this service; there will be a
charge for this and a renewed Calibration Certificate will accompany the
returned equipment. Contact Ambrell for details.
2
2
.
.
7
7
S
S
m
m
a
a
r
r
t
t
b
b
u
u
r
r
s
s
t
t
T
T
e
e
c
c
h
h
n
n
o
o
l
l
o
o
g
g
y
y
The E
ASY
H
EAT
work heads contain one or more water cooled capacitors, rated for
current under laboratory (rather than real-world) conditions. The E
ASY
H
EAT
systems
make use of Smartburst technology which allows users to approach these higher current
limits in actual use under many real world conditions while maintaining the safety
margins required for long operating life.
Smartburst considers both thermal time constants and self-heating in the capacitors and
work head components to allow higher currents out of the work head as long as the
average value is safe, and if the continuous on time is within limits for the levels in use.
Beyond these limits,
CAP TEMP PROTECT and
REDUCE OUTPUT
messages are displayed on the status page, and levels are brought to a safe value.
This chart illustrates operation for a capacitor with a laboratory current rating of 750A.
When the limit becomes active, coil current is held with a ceiling of about 80% of the
laboratory value (

600A).
Continuous Heat Time vs Coil RF current
0
150
300
450
600
750
900
600 650 700 750
Current (A)
Time (
s)