MK (E2.1) 10/2014
page 44/73
10. Bedew protection facility (operation line 1)
The bedew protection condensates the chamber humidity at the coldest point in order to avoid the sam-
ples becoming wet from condensation. Bedew protection is performed by the evaporator and can be pro-
grammed On/Off via operation line 1 in Manual Mode (HAND) and in Program Mode (AUTO). The other
operation lines are non-functional.
Use the bedew protection only if absolutely necessary to prevent condensation on the charging
material.
When the bedew protection is enabled (operation line 1 = On) the refrigeration machine keeps operating
within warming-up phases (On = refrigeration machine operating, Off = refrigeration machine off).
•
If possible, use the bedew protection only during warm-up phases.
If necessary it can also be
activated during hold phases.
•
Do NOT use the bedew protection above a temperature set-point of +20 °C maximum.
To obtain optimal warming results without condensation on the samples, program a heating gradient of
about 0.5 °C/min.
Example:
W/°C
t/min.
00
01
02
03
-40
-20
0
20
40
60
80
120
180
380
04
ON
OFF
t/min.
Minimum
tolerance
Maximum
tolerance
Operation line 1 = bedew protection
In the program table the state of operation
line 1 for bedew protection is represented
in the column “Sk”:
On = 0000000
1
Off = 0000000
0
Example:
Operation line 1 is activated in the first
program section and remains active up to
+20 °C.
Then the refrigeration machine turns off
automatically.
PGM
08:43:55 15.12.13
