36
8.3
OPERATIONAL CHECK
• Set a temperature value (e.g. 20
°
C) on the control panel and start a work cycle (refer to the attached OP7 handbook).
• Open the upper door (only for three-phased chambers) and check that the chamber fan motor is turning in the direction
indicated by the arrow marked on the motor itself.
If the motor is turning in the opposite direction, change over the phases on the supply. The operation must be carried
out by qualified personnel.
CH0305-290
Before carrying out a climatic cycle (tempera-
ture-humidity):
• Fill the humidification system tank with
demineralized water or open the water sup-
ply circuit.
A
1
Gauze 1 must always be kept clean and
white, that is to say intact; if it shows a
deposit or appears dirty or blackened,
replace it immediately.
The gauze must always be wet.
When climatic tests are not being carried
out, remove the gauze to avoid its wear
and tear.
2
3
Tests at high temperatures may mean that
the gauze has to be replaced for each test.
8.4
CONTROL OF WET BULB GAUZE (climatic chambers)
8.2.3 Fixed alarm for maximum temperature
• This is triggered when the maximum admissible temperature value is exceeded accidentally.
The voltage is switched off and the technical assistance service must be contacted.
1 Wet bulb gauze
(A= 30 mm min.)
(Length about 120 mm)
2 Dry bulb probe
3 Wet bulb probe
8.4
