K8AC-H
22
Why does the current measured by the K8AC-H decrease
during cyclic or phase control?
To enable measuring the current accurately for the heater
control value, the K8AC-H
@@
P
@
-FLK uses the current input
waveform from a gate input and the Current Transformer to
compensate the measured current value and burnout alarm
value. The compensated current value is displayed, so it
appears as if the measured current is lower during cyclic or
phase control, but the K8AC-H
@@
P
@
-FLK is operating
correctly.
How do I set the burnout detection alarm of the K8AC-
H
@@
P
@
-FLK when phase control is used?
Set the burnout alarm value of the K8AC-H
@@
P
@
-FLK based
on the current measurement value with the heater output at
100%. (This is because the burnout detection alarm of the
K8AC-H
@@
P
@
-FLK depends on the control input.)
When you set the burnout alarm value, make sure that you
make the setting based on the current measurement value
when the control of the power regulator is 100% or the rated
voltage is applied to the heater.
Q & A
Q
Q
Heater current
4 mA
Heater current
Heater burnout
alarm value
A
m
0
2
A
m
7
Control output from temperature controller
Heater Burnout Alarm Value
The heater burnout alarm value shifts
according to the control input (4 to
20 mA) from the temperature controller.
Authorised Distributors:-
Intech Systems Chennai Pvt. Ltd
S-2, Guindy Industrial Estate, Chennai-600 032
E-mail: [email protected] Website: www.intechchennai.com
Ph: +91 44 4353 8888 Mob: Fax: 044 4353 7888
