Thermo Scientific STF55433 Installation And Operating Manual page 42

| Main Controller: 5x16 Segment Programmable
Chapter 6
No. Parameter
21 PB
22 TI
23 TD
24 LBT
25 PV.OFS
26 ADDR**
27 BAUD**
28 IN.TYP
29 ID
|
6-40
305435H03
Description
Proportional Band
Integral Time
Derivative Time
Loop Break Time
PV Offset
Comms Address
BAUD RATE
Input Type
Customer ID
*Level 1+2 Read Only states that, Level 1 gives Read only access to user where as
Level 2 gives Write access along with Read access.
**COMMS units only
Holdback Function
The temperature ramp rate of the program is quicker than the furnace or oven can
achieve, the program will wait until the temperature of the furnace or oven catches up.
e.g. If a holdback value of 10 is set and the program is set to ramp to a set point of
600°C, the program will reach 600°C, then go into an hold state; the hold indicator will
light until the furnace or oven temperature reaches 590°C, the program will then continue
to control again.
The holdback will only apply once per Segment, therefore when control has been
reestablished, the holdback will not apply again to that segment, even if the furnace or
oven temperature go outside the holdback band. Each program can have its own
holdback value assigned to it.
H.BACK can be accessed from Level 1 or Level 2. To set the holdback value:
Level Access
Level 2 Read/Write
Level 2 Read/Write
Level 2 Read/Write
Level 2 Read/Write
Level 2 Read/Write
Level 2 Read/Write
Level 2 Read/Write
Level 2 Read Only
Level 2 Read Only
Page
Value
no.
70 -
220 -
37 -
30 mins 6-31
0 6-30
1 7-48
9600 7-48
R Type -
Thermocouple
310 (without -
COMMS)
311 (with
COMMS)
1500°C Tube Furnace