TECHNICAL MANUAL
Speedster
page 48
From °C to °F
When changing a PID programmed in degrees Centigrade to display in Fahrenheit, you
have to change the parameter values of setpoint (Sp), lower and upper “safety”
temperature (SPL and SPH resp.) and process display (C112). The complete list of
parameters and set values for display in degrees Fahrenheit is given in Table 2.
press
alternating display
parameter
value
P
Sp
200.0
P > 2s
AL
1.0
P
Pb.1
5.5
P
dt
15
P
rt
75
P
CY 1
2.5
press
alternating display
P
HYS.1
1.0
parameter
value
P
Y .0
0
or ->
P > 2s
C111
001
P
Y .1
100
P
C112
4
P
Y .2
-100
P
C113
20
P
dF
1.0
P
C114
6
P
Return to: Sp
P
C115
0
P
C116
0
P
C117
0
P
C118
0
P
C120
0
P
SPL
176.0
P
SPH
210.0
P
OFFS
0.0
P
HYSt
1.0
P
Return to: AL
Table 2. Shows scrolling sequence of PID and factory value settings of the individual
parameters (in °F). Highlighted are the values to change when switching to degrees
Celsius: change value for “SP” last.
Note!
The PID will stop functioning when you enter a setpoint (Sp) above the upper security
temperature level (SPH) and leave the programming phase without changing the upper
security temperature level. For this reason, when you change from Centigrade to
Fahrenheit, change the value for SP
after
you have changed the values for SPL and SPH.
Resetting the PID
When your PID does not respond to unlocking or programming you may reset the PID to
the JUMO manufacturer settings by first switching the Speedster “off”. Then, while
pressing both the P and
˄
keys on the PID simultaneously, switch the Speedster “on”.
Note!
When the PID is reset, all parameter values will return to JUMO manufacturer setting
which means that you have to re-enter all Speedster settings by hand, also the settings
in the sub-menu that can be entered when the display shows “Y. 0”.
For more information on the PID we refer to the operating instructions of the JUMO
iTRON B 70.2040 which were included in your shipment.
