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PTB150-MAN-V14.0
PTB 150-157 Instruction Manual
DESCRIPTION OF REGULATOR’S MENU
The calibrator has three menu levels( see image 10.2):
at the first level there are the functions for the continuous usage,
at the second level there are more specific functions for the regulation of the calibrator,
at the third level there are the typical functions for each calibrator and the calibration procedures.
1
st
MENU LEVEL
PRESS THE
F
KEY TO STEP THROUGH THE MENU
- SP
SET POINT: temperature set which the oven has to reach following technical specifications, press the
or
key to adjust the set point and press
E
key to accept new the new value.
- SP2
SET POINT2: temperature set which the oven reaches with the set gradient and the ongoing launched
ramp procedure, press the
or
key to adjust the set point and press
E
key to accept new the new
value.
- GRAD
GRADIENT: set point variation speed during the change from one temperature value to the SP2 value,
press the
or
key to adjust the set point and press
E
key to accept new the new value.
The set gradient must be negative for descent ramps.
NOTE: gradient values to be set must be lower than the ones stated in the technical data, at point 2.2
(cooling grad. max.: -7°C/min.; heating grad. max. 18°C/min).
- RAMP
Ramp procedure enabling/disabling.
Select ON or OFF by the
or
key and press
E
key to accept; the oven will reach the set SP2
temperature with the set gradient, starting from the same temperature as the one with which the ramp
has been confirmed. The starting temperature does not depend on the Set Point temperature.
If a negative ramp is set put the gradient is left positive and/or the SP2 is higher than the current
temperature, the little over will not accept the ramp start and an alarm will begin running.
When the ramp is on, the display will show the word "
Ramp:.......
" followed by the Set Point value on the
second line of the text. The Set Point value will reach the speed related to the set gradient.
When the block temperature reaches the SP2 set temperature, the oven will produce an alarm and the
ramp procedure will be automatically set off; the SP2 value will be considered as the new set point value
and the oven will be steadily set at that temperature.
During the ramp process, the derivative parameter will not be considered.
RAMP PROCEDURE EFFECTIVE EXAMPLE
Let’s say that the set temperature is the ambient one and that it is
necessary to reach 400°C with a
gradient of 2°C/min.
- Press the
F
key and set
SP2
to 400°C using the
or
keys. Press the
E
key to accept.
- Press the
F
key and set
GRAD
to 1°C/min using the
or
keys. Press the
E
key to accept.
- Press the
F
key and set
RAMP
to
ON
using the
or
keys. Press the
E
key to accept.
After pressing the E key to confirm the ramp start, the oven temperature will ascend with the set slope.
Of course, there will be some oscillations at the beginning since the ramp slope will not be suitable but
they will stop in a short time and then the oven temperature will follow the ramp’s set point.
- RIS. 0.1/0.01
Display reading resolution; Press the
or
key to select 0,1 or 0,01 and press
E
key to accept.
- SW. ON
Switch on; displays the temperature at which the thermostat connected to the terminals "SWITCH TEST"
is closed.
