Datasheet

DATA SHEET
Technical changes reserved
Technical data
Humidity measurement
Measuring range 0 ... 100 % RH,
without condensation
Accuracy ± 2 % RH (from 30 ... 90 % RH)
Response time t
90
Approx.25sec.(withprotectionlter)
Output scaling 0 ... 100 % RH FS
Temperature measurement (only Type TE1)
Measuring range -30 ... +70 °C
Accuracy ±0.5 °K (from 0 ... 50°C)
Output scaling -30 ... 70 °C FS
General
CE-Conformance 89/336/EWG
EMV Noise emission EN 61000-6-3:2001
EMV Noise immunity EN 61000-6-2:2001
Probe dimensions See drawing
Probe housing Stainless steel 1.4571
Type -AF: polyamide
Protectionlter PE-Sinterlter40µm
Electronics housing Plastic
Connection Screw terminals 0.75 mm
2
Connection cable 1500 mm (Type -EXT)
Operating voltage Type –10V: 12 ... 24 V AC/DC
Type –20MA: 12 ... 24 V DC
Over voltage protection Varistor and RC-Filter
Supply
For 4 ... 20 mA model, only DC supply is possible. The 0... 10 V
model can be alternatively fed with either DC or AC voltage and also
withunlteredrectiedvoltage.
In case of AC supply, the neutral point of the transformer must be
connected to signal ground and the connection of further probes
must be absolutely done with phase balance. In case of supply with
rectiedunlteredvoltage,theminusmustbeconnectedtoreference
ground and plus to be connected to +DC/AC 24 V. Wrong connection
leads to malfunctioning or can cause damage to the electronics!
Calibration
The measuring sensors are calibrated with reproducibility of PTB
Nationalstandard.CalibrationcerticateasperISO9000standardis
alsoavailablewithsomeextracharges.
Forre-conrmingmeasuringaccuracybytheenduser,reference
cellsareavailableforspecichumidityvalues.Forconformanceto
specications,werecommendcheck-upatregularintervals.
Setting
The sensors are long term stable and are maintenance free in a clean
environment. Hence, a re-calibration is not required as per practice.
For the temperature and humidity channel, always a potentiometer is
provided on the motherboard by which the upward gradient can be
re-adjusted, if required. For the humidity channel, use of our humidity
reference cells is recommended as a calibration standard. The adjust-
ment of temperature channel is done with a reference thermometer.
The calibration work presupposes relevant knowledge and is only
recommendedifrequiredexperienceandequipmentareavailable!
Measurement of signal voltage
In order to avoid measuring error in the 0...10 V model, due to line
resistanceandcurrentowthroughthegroundingwire,aseparate
grounding wire is to be employed for the signal voltage. The voltage
measurement should be with a four wire system.
Protectionlter
Thehumidityprobeissuppliedwitha40µmPEsinterlterasa
standardpackage.Otherlters,includinghydrophobicspeciallters
are available as special accessories.
Precipitationsonthelterorsensorelementcandeterioratethe
responsebehaviour.Contaminatedltersshouldbereplaced.
Connection
Preferably shielded connection cable should be used for the connec-
tion. First of all, it is to be noted that in EMI disturbed environment,
the shielding should be grounded. Check before connection, whether
thesupplyvoltageisasperoperatingvoltagespecicationmentioned
in the data sheet.
Humidity-Temperature probe with
standard Signal FF-GLT-Series
B+B Thermo-Technik GmbH | Heinrich-Hertz-Straße 4 | D-78166 Donaueschingen
Fon+4977183160|Fax+49771831650|[e-mail]|bb-sensors.com
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