GH 500 Hygrometry generator
GH 500
Hygrometry generator
Table of Contents
1 Instrument description..........................................................................................................................4
1.1 Schematic drawing........................................................................................................................4
1.2 Description....................................................................................................................................4
2 Operating..............................................................................................................................................5
2.1 K38 display description.................................................................................................................5
2.2 Operating principles......................................................................................................................5
2.3 Enter a setpoint value...................................................................................................................5
2.4 Performances................................................................................................................................5
2.5 Use advice....................................................................................................................................5
3 Change the consumables....................................................................................................................6
3.1 Regeneration of the silica gel.......................................................................................................6
3.2 Maintenance of the bubbler..........................................................................................................6
4 Cable glands........................................................................................................................................7
5 Transport case......................................................................................................................................7
1 Instrument description
GH500 instrument is the key instrument to adjust and calibrate in ambient air your measuring instruments in hygrometry.
Easy-to-use, it will guarantee fast and stable hygrometry generations.
1.1 Schematic drawing
1.2 Description
01. K38 controller with adjustable setpoints
08. Anti-overpressure calibrated leakage
02. K38 keypad : selection of the setpoint value
09. Measuring chamber with front opening
03. CPE 310-S tramsitter for measurement of the chamber
10. Cable gland for probes
04. CPE 310-S keypad : configuration of the measurement transmitter 11. Moinstening cartridge
05. Blower
12. Drying cartridge
06. SHSI thermo-hygro measuring probe for CPE 310-S
13. On/Off key
07. Metallic mounting plate to magnetize the instruments
14. Power supply
4
2 Operating
2.1 K38 display description
1 : OUT1 : pump of the wet circuit in operation
2 : OUT2 : pump of the dry circuit in operation
3 : - : value of the measured humidity is lower than the setpoint value
4 = : value of the measured humidity is stabilized at the setpoint value
5 : + : value of the measured humidity is higher than the setpoint value
1 2 3 4
5
2.2 Operating principles
The GH 500 is a device which allows to generate points of relative humidity on a range from 10 to 85% HR. It works on the
principle of a mix of moist air and dry air in different proportions, which gives a required relative humidity. For the generator
works optimally, it must be placed in the most stable room in temperature (between 20 and 25 °C). This condition will define
the homogeneity in humidity of generator internal volume, because we work on a size which depend on the temperature.
Once the generator is properly installed and lighted, simply select the value of the required relative humidity.
2.3 Enter a setpoint value
To enter a setpoint value :
➢ Press on P The screen starts flashing in displaying SP1 and the actual setpoint value.
➢ Press on
to increase the setpoint value or on
to decrease the setpoint value.
➢ Press on P to validate.
➢ Press on U during 3 seconds to return to the normal display.
2.4 Performances
The stability of the GH500 regulation allows to have a regulated setpoint value at ± 0.1% RH. It is able to pass from 10 to
85 % RH in 35 minutes and from 85 to 10% RH in 30 minutes. However, the durations can vary according to the
consumables wear condition, if the rise and fall times become more longer, verify their conditions.
The homogeneity in dry temperature is 0,1°C in a restricted volume, it is therefore advised in order to have a precise
measurement to put the probe in the middle of the housing.
2.5 Use advice
The measuring chamber must be always airtight. The marble of the anti-overpressure calibrated leakage (see 08 instrument
description chapter) must turn when the pump is in operation.
If not, check that the front part of the measuring chamber is well closed and that the cable glands are well blocked.
5
3 Change the consumables
3.1 Regeneration of the silica gel
Before using the device put a cotton filter at each end of the silica gel tube.
The silica gel is a material which allows to drain the air; the little balls pick up moisture: their color pass from orange to
transparent. When the colour becomes transparent, the silica gel looses its absorption capacity and must be regenerated.
One hour in an oven at a temperature of 100°C allows a proper recovery of its properties. However, as we go along of its
application, its capacity are degraded and it is necessary to change it.
Cotton
Silica-gel
Cotton
3.2 Maintenance of the bubbler
The bubbler allows to load air in humidity. For an optimal operation, the level of water must be maintained. You must use
distilled water to avoid the stagnation and clean the bubbler if the water changes colour or becomes opaque. It is important
not to exceed the maximum level indicated at risk of see the water overflowed from its tank and infiltrate the pneumatic
circuit.
Water level
6
4 Cable glands
The M36 thread is adapted to insert a mirror for example.
5 Transport case
During the transportation, please empty the cartridge of demineralised water. Unclip the drying cartridge and
empty it in the flask n°2.
Slica-gel
flask (250 g)
GH500
Location for
accessories
Demineralised
water flask
(250 ml)
Flask n°2 for the
transportation of the
demineralised water (250 ml)
7
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NTang_GH500_17/10/14 – RCS (24) Périgueux 349 282 095 Non-contractual document – We reserve the right to modify the characteristics of our products without prior notice.
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