E-M-HG2-S-V1_04
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroGen2 humidity and temperature
generator: Instruction Manual
Instruction Manual
Document Type
Page
13
of 46
Document title
© 2009-2010; Rotronic AG
13
E-M-HG2-S-V1_04
1.9 Low Water Level Alarm
The HygroGen requires water to create high levels of humidity returning from
the internal saturator. The unit will inform the operator if the water level in the
reservoir is too low with a visual ‘Low Water Level’ alarm prompt on the
controller screen. This prompt may be dismissed by following the-on screen
instructions. When the ‘Low Water Level’ appears replenish the reservoir with
≈50 ml of water.
If the water level in the satur
ator persistently falls below ≈2
0 ml, a ‘Humidity
Disabled’ warning is triggered and humidification is disabled to prevent damage to the humidifier.
Humidification will not be re-activated until the water level is restored.
An alarm icon shows in the top right-hand corner of the screen when a warning condition
exists.
Water level may be checked at any time within the settings screen. The water level
sensor is for indication only; observe the volume specified within Section 2.1 when
adding or removing water. The fill syringe (HG2-FILL) supplied with the HygroGen
includes volume markings to assist in this respect.
Note:
If the ‘Low Water Level’ message appears on the controller screen during use,
the HygroGen can be topped up with 50 ml of distilled water. This will bring the total
water content of the reservoir to approximately 80 ml. Ensure the electrical supply to the
HygroGen is disconnected during filling.
1.10 Switching Off
Before switching off the HygroGen the chamber should be dried to avoid condensation occurring within
the HygroGen chamber. If you use the master power switch, you should first dry the chamber by setting
a low RH value.
The touch screen power button shuts the HygroGen down
in a controlled manner (see also 4.10). Pressing this button
opens a screen as shown; either wait 30 seconds or
confirm Shut Down. This initiates a sequence that conditions the
HygroGen chamber to a safe state that eliminates the possibility of
condensation formation during cooling. The HygroGen automatically
reduces the chamber RH before powering down (see Section 4.10 for a full description of
Transit/Shutdown modes).
