Principle Of Operation - JUMO 202550 Operating Instructions Manual

9 Operation

9.2 Principle of operation

Operating
modes and
states
Levels
Measurement
1
mode
(normal
operation)
Operating
1
level
Parameter
1
level
Configuration
1
level
24
Measurement mode
(normal operation)
Self-test
(after power-on)
Manual mode
Hold operation
Operation,
parameters,
configuration
Error
The instrument functions are arranged in four levels (see diagram on next
page):
- Measurement mode
- Operating level
- Parameter level
- Configuration level
The measurements are displayed at this level. Manual operation, hold and
calibration can be activated.
Setpoints, alarm tolerance, alarm delay and the limits for the limit comparators
are entered and displayed at this level.
Controller parameters and other settings are programmed here.
The display of the individual parameters depends on the type of controller
action.
The basic functions of the instrument are configured at this level.
1
Entries can only be made after the correct code word has been entered.
"Unlocking the levels", page 27.
The process value and temperature are displayed.
All indicators light up;
the temperature display blinks.
The process value display continually switches
between the process value and the text "HAnd", the
temperature is displayed.
The process value display continually switches
between the process value and the text "HoLd", the
temperature is displayed.
The temperature display shows the parameters from
the various levels; the process value display shows
the corresponding values and codes.
The temperature display continually switches
between the temperature and the error code (e.g.
F010),
Chapter 34 "Warnings – Errors", page 101ff.