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PTB150-MAN-V14.0
PTB 150-157 Instruction Manual
- SW. OFF
Switch off; it displays the temperature at which the thermostat connected to the terminals "SWITCH
TEST" is
open. The value is reset each time the power supply fails or by pressing the two ”
” keys at
the same time. The value is updated every time that the contact closing is detected.
-
SENSOR (OFF/EXT/REF/EXT+REF)
This parameter allows enabling the reading of sensors on the auxiliary inputs:
OFF
no input is enable to read the sensors’ value.
EXT
the four terminals of the input EXT are enabled to read the sensor tied to them, whose value is
indicated at the bottom of the Display.
REF
the four terminals of the input REF are enabled to read the sensor tied to them, whose value is
indicated at the bottom of the Display.
EXT+REF
the eight terminals of inputs 1 and 2 are enabled to read the sensors tied to them, whose value
is indicated at the bottom of the Display.
2
nd
MENU LEVEL
PRESS THE
F
+
KEYS AT THE SAME TIME TO ACCES THE SECONDARY MENU.
PRESS THE
F
KEY TO STEP THROUGH THE MENU.
PRESS THE “
F
+
KEYS AT THE SAME TIME OR WAIT FOR ABOUT 20 SECONDS TO COME BACK
THE PRIMARY MENU
- P.B.
Value of the Proportional Band expressed in percentage of the value of the end of the scale. Proportional
band means the length of time in the measure field within which there is the variation of the regulation
probe exit alarm and therefore the adjustment of the heating element power.
- T.I.
Integral Time value expressed in seconds. The integrating action cancel the error between the chosen set
point and the temperature reached only by the proportional action. Integral time means the length of time
necessary to the integrative action to double up the proportional action
- T.D.
Derivative Time expressed in seconds. When there is a step variation of temperatures, the derivative
action induces an greater initial adjustment, so that the oven will have a greater power than it usual has
due to the proportional and integral action only. Since the error keeps existing, the derivative action
reduces the impact giving the integrative action the task of reducing the error.
- EXT SENSOR TYPE: J, R, S, N, K, E, Pt100, Pt100 3wires
This parameter allows selecting the kind of sensor read by the display and connected to the four Ext.
terminals.(item 6.4.1)
- Units °C/°F/K
This parameter allows selecting the temperature measuring unit. By selecting "
°C
" all temperatures will be
expressed in Celsius degrees; by selecting "
°F
" all temperatures will be expressed in Fahrenheit degrees.
- Def. Par. ON/OFF
Default Parameter; this function allows choosing to set the thermoregulator with the P.B., T.I., T.D.
parameters either as a default or as a customisable adjustment. By selecting the "
OFF
" parameter and
confirming by the "
E
" key it is possible to modify the adjustment parameters, which will keep operational
even if the calibrator is turned off. By selecting the "
ON
" key (followed by the confirmation by pressing the
"
E
" key) the adjustment values will be set on the default ones recorded by the manufacturer, and
therefore not allowing to be changed. By turning the calibrator off the parameter will set on OFF but the
default parameters will be kept recorded.
- REF SENSOR TYPE: J, R, S, N, K, E, Pt100, Pt100 3wires
This parameter allows selecting the kind of sensor read on the display and connected to the four REF.
Sensor terminals.(item 6.4.1)
