Riele Photometer 5010 V5+, Руководство по обслуживанию

Страница: 75 / 95

4.40 PCB RR-120 MOTHERBOARD REF 5010-120
Thermal adjustment
The PID-controller algorithm works always as follows:
ACTUAL VALUE = REQUIRED VALUE
REQUIRED VALUE
= TEMPERATURE VALUE + CORRECTION VALUE
Explanation:
ACTUAL VALUE
⇔
Actual value of the ADC
REQUIRED VALUE
⇔
Sum of TEMPERATURE VALUE + CORRECTION VALUE
TEMPERATURE VALUE
⇔
Value assigned to a temperature level of 37 °C, 30 °C or 25 °C. This
value is automatically selected by the device according to the state of
operating. The temperature value is board-characteristic and cuvette
adaptor specific. The values for the temperature levels of 37 °C, 30 °C
or 25 °C are ascertained in factory and noted during the check of the
board. They are stored within the battery powered RAM.
Dependent on the used cuvette adaptor different service programs can
show and edit the values stored in battery powered RAM. The system
can be adjusted to lower or higher temperature values. A change of
about 25 counts means a temperature change of 0.1 °C.
•
Service program S10 - Temperature value
is used for editing the value
(chapter 3.3)
•
Service program S12 - Temperature calibration
calibrates the system automatically.
(chapter 3.3 / chapter 9.1)
The value is noted on a sticker. The sticker is shown on the left and put
on top of the IC15 (SABC517).
The sticker shows the serial number of the board (e.g. 7000) and the
temperature values of 25 °C, 30 °C, 37 °C of standard cuvette adaptor
(S) and flow-through adaptor (FTH).
In addition the values are documented in the device card of Photometer
5010 V5+ and stored in a file at the manufacturer.
RR_120 7000
S FTH
25 °C 8255 8230
30 °C 9495 9430
37 °C 11198 11113
CORRECTION VALUE
⇔
Correction value in the range of 0 and 9999. The default value is 3000.
After using the service program S1 - System initialization (chapter 3.3)
the correction value is set to the default value 3000.
The system can be adjusted to a lower or a higher temperature value. A
change of about 25 counts means a temperature change of 0.1 °C.
•
Service program S11 - Correction value
is used for editing the value
(chapter 3.3)
•
Utility programs U10 - Temperature adjustment
adjusts the system automatically.
(chapter OM 7.2.10)
RIELE BERLIN Photometer 5010 V5+ 4.40.11 17.03.2009