Datacolor Conditioner Operation Manual / DCCOPMN_RP1 / Rev 3.0 / 7th August 07
page 40 of 51
9.
Humidifying and dehumidifying system
The humidifying and dehumidifying system serves to humidify the atmosphere inside the chamber up to a
preselected value. It consists of three main components:
•
Humidity sensor to measure the relative humidity inside the unit.
•
Humidifying system to generate steam using two electrodes. Inside a water basin the electrodes
generate steam, which is conducted into the inner chamber.
•
Evaporator plates of the cooling system to dehumidify the air of the inner chamber
Following opening of the glass door or a water exchange in the steam cylinder, humidity can
markedly fall below its set-point during 10 to 30 minutes.
The Datacolor CONDITIONER™ sample conditioning cabinet is equipped with a door heating system to
prevent condensation in the door area.
Due to the construction of the CONDITIONER
TM
no icing occurs in the inner chamber during de
dehumidification.
The unit can be operated permanently without manual defrosting.
9.1
Humidifying and dehumidifying system of CONDITIONER
TM
with lighting
unit
The control of temperature and humidity of this unit is optimized to a working point 21°C/65% RH. The
fluctuations at this point are ± 0.5°C and ± 2.0 % RH
10 20 30 40 50
10
20
30
40
50
60
70
% r.H.
°C
Figure 9: Temperature-humidity-diagram of CONDITIONER
TM
with lighting unit
(Hatched area: optimized operating range of the humidity system)
The CONDITIONER™ with lighting unit can be operated within an optimized operating range of 15°C to
31°C and 38 % RH to 70% RH in a stable manner and without excessive condensing (Figure 9).
Switching on the illumination modifies the operating range, and the humidity set-point at 20°C must not be
lower than 30 % RH, otherwise stable humidity control is not guaranteed.
Outside the optimized operating range there is increased risk of condensation, which can
trigger the internal residual current operated device if the illumination is switched on and thus
cause switching off the unit. The residual current operated device permanently switches off-
tension the unit as soon as the residual current exceeds 30 mA.
