Carbolite PTC 12/20/150 User Manual
Page 7
PTC
MF11 – 3.08
7
4.5 Altering the Ramp Rate
It is possible to limit the rate of heating by setting a ramp rate only if the timer feature is not in use.
To enable direct setting of the ramp rate, first ensure that the
StAt
parameter and
dwEl
parameter
are both set to
OFF
Press Scroll until the legend
SPrr
(SetPoint ramp rate) is displayed. Use Down or Up to
display and adjust the value.
The ramp rate sets the maximum rate of heating or cooling in degrees per minute. A value of
OFF
cancels the ramp rate, allowing heating and cooling at the maximum rate. When this feature is in
use, there is a “working setpoint” which can be viewed at any time by scrolling to
w.SP
and
pressing or .
Fig 1 and fig 2 indicate the possible difference between running without and with a ramp-to-
setpoint value (depending on the load and the value used).
4.6 Navigation Diagram
OP.Hi
SPrr
m-A
w.SP
Home
List
Input
List
Output
List
Access
List
20.0
iP
oP
ACCS
OP
OFS.H
CAL.P
CAL
Pnt.L
OFS.L
Pnt.H
codE
tmr
dwel
StAt
tm.OP
*C
*C
setpoint ramp rate
OFF or value
power limit
setting, if
present
output power,
read only
measured temperature;
use
/
to access
setpoint
manual/Auto
mAn=off, Auto-on
user 2-point
calibration
timer mode
time remaining
dwell time for
timer
timer status
run or OFF
for factory access to
lists and parameters
not available to the
operator
present only if
SPrr in use
enter
password
if user
calibration