to set the value from 50 °C to 250 °C in 10 °C
increments),
c) “Door” - the fan keeps running after the
programme termination and switches off after
the door opening (applied only for units with a
closed door sensor);
d) “alws” – the fan keeps running till the cabinet is
switched off by the
ON/OFF
button.
other options are available to VH only:
e) “Off“ – fan switched off,
f) „End“ – the fan starts after program termination
and switches off only when the device
is switched of. In the course of program
operation the fan stops, which positively
affects the thermo homogeneity.
4.1.8
SERVICE
07
-
SAFETY
THERMOSTAT
SETTING
Safety thermostat serves to protect the
thermal technology cabinet, its surrounding
and treated material against inadmissible rise
of set temperature (e.g. prevents damage
or destruction of material samples in case of
damage to the temperature regulator or in case
of unintentional setting of a temperature in the
chamber of the unit higher than the sample is
able to withstand).The service is opened by the
depression of the
STArT/STOp
button.
Set the upper limiting temperature selected
by you on the bottom line of the display – on
the position 12, 13, and 4 (symbols XXX on the
display). The minimum difference from the preset
regulated temperature is +5°C. Set the safety
thermostat type on the position 16 (symbol y on
the display):
Type 2 – It is used for the types VC, EC, and
DC. If the preset temperature in the chamber
is exceeded, the display shows the error 04
– “Therm.protect.activated”. The thermostat
switches off the heating elements; the indicator
“safety thermostat” and the acoustic alarm are
switched on. The unit does not heat although the
indicator “heating” shines.
To restart the activity, the safety thermostat must
be reset – the error message and the acoustic
alarm are cancelled by pressing the button
STArT/STOp.
The safety thermostat is also reset
after each pressing the button
X/W
in the service
07.
Type 3 – It is used for the IC and ICV types. If the
preset temperature in the chamber is exceeded,
the thermostat switches off the heating elements;
the indicator “safety thermostat” and the acoustic
alarm are switched on and the display shows the
alternating messages “Therm.protect.activated”
and the previous information. The unit does not
heat although the indicator “heating” shines.
after the temperature in the chamber drops
below the preset limit of the safety thermostat,
the unit continues its work (e.g. the heating
is switched on again) – the indicator “safety
thermostat” turns off. The acoustic alarm is still
active and the display shows the alternating
messages “Ochr.term.aktiv” and the previous
information. Cancel these two non-standard
status signals by pressing the button
STArT/
STOp.
To confirm set temperature and type of the
thermostat, insert the chip card „SO“ in the card
reader and press
X/W
.
Terminate the service and close by the
depression of
STArT/STOp
button again.
Check of the safety thermostat function:
according to the procedure described in Service
07 – setting the safety thermostat - set the
temperature limit to 85 °C and confirm with the
chip card So. In P1 set the temperature 60 °C
and start the program. after reaching the set
temperature wait for about 10 minutes, stop the
program and select the Service 07; in Service
07 - set the temperature limit to 50 °C and
confirm with the chip card SO. The unit operates
according to the description in Service 07
– Setting the safety thermostat: report ”Safety
Thermost.” on the display etc.
4.1.9
SERVICE
41
-
TEMPERATURE
TOLERANCE
The bottom line of the display shows the
message “+XX.X °C -YY.Y °C”, where “+XX.X”
means the upper deviation of the temperature
(adjustable range 0 to +20) and “-YY.Y”
means the lower deviation of the temperature
(adjustable range 0 to -20). If a situation occurs
during the programme run that the temperature
in the chamber is lower than the preset
temperature minus the lower deviation,
error 2 is shown. If a situation occurs during
the programme run that the temperature in the
chamber is higher than the preset temperature
plus the upper deviation, error 3 is shown. If
a 00.0 deviation is set, the deviation is not
controlled.
The type of the errors no. 2 and 3 when the
temperature goes out of the preset range is
selected on the last character. There are the
possibilities “H” (the errors are “critical”) –
the programme run is stopped; or “S” (the errors
are “soft”) – the programme keeps running. The
default value (after RAM initialization) is “H”
(critical error).
LSI_K_np_en 1206_mmm_V2.08_B2V
9
Instructions for use
