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Combined Temperature/
Humidity Sensor
in shelter

3031.0000 BG
Page: 1 / 4

3
2
1
Issue.

12.09
10.09
07.09

Zi
Zi

Date

Name

Technical Data
Material of probe:

ABS-plastic

Cable:

(Versions 3031.0000 and
.1000 only)
LiY( C )Y, 11 x 0.25 mm2,
length 3 m
(fan: LiYY, 2 x 0.25 mm2,
length 3 m)

Power consumption:

approx. 3.0 mA at
12 V DC (Versions
3031.0000)

Fan:

12 V DC, approx. 70 mA
(Versions 3031.1000
and .1200 only)

Humidity sensor:
Meas. range:
Calibrating accuracy:
Max. annual drift:
Time constant:
Output:

Capacitive element
0...100 % rH
±1 % rH
1 % rH / year
0.7 s
0...1 V corresp.
0...100 % rH
> 10 kΩ

Impedance:
Temperature sensor:
Output 1:
Output 2:

Description
The transmitter type 3031 is designed for measurement of relative humidity and temperature. Sensing is
accomplished by capacitive measuring element for
humidity and a platinum resistor Pt 100 for temperature measurement. Both sensors are located at the
tip of a probe and protected by a membrane filter.
The probe is mounted at the base plate by means of
a special socket. There the probe is fixed with a fixation screw. The base plate provides 2 holes, 30 mm
distance, for M8 screws for fastening.
The unit is protected by a radiation protection shelter,
made of a special white plastic material.
Following versions are further available:
Version with electrical ventilation, to obtain exact
measuring values even with total calm.
Version with measuring converter which is placed in
a housing underneath the sensor. Data output is
4...20 mA each.

Pt 100, according to
DIN 60751 B, 1/3 tolerance
Measuring resistance
Pt 100, 4 line
0…1 V accordingly
-40…+60 °C

Compliances:
Power supply:

WMO Guide No. 8/7th ed.
5...24 V DC; < 4 mA
(without fan and electrical
ventilation)

Operating temp.:

-40...+85 °C

Dimensions (shelter):

∅ 130 mm,
height approx. 185 mm

Weight
(shelter with holder):
Measuring converter:
Input:

approx. 780 g
Voltage: 0...1.0 V;
meas. range: 0...100 %
Pt 100, meas. range
–35...+45 °C

Output:

4...20 mA; supply 18...30 V
DC, load depending
(500 Ω...1.9 kΩ lin.)

Max. error:

±0.25 %

Error by:

Supply voltage: <50 ppm/V
Ambient temp.: <50 ppm/°C

EMV, Emission:

EN 50081-1

EMV, Noise:

EN 50082-2

Connection:

8-p. connector, IP 67
sealed (plugged)

3031.0000 BG

Combined Temperature/
Humidity Sensor in shelter

Ordering Code

Page: 2 / 4

Calibration and Maintenance

Temperature/humidity sensor, in shelter

3031.0000

Temperature/humidity sensor, in shelter, electrically aspirated

3031.1000

Temperature/ humidity sensor incl.
measuring converter 4...20 mA, in
shelter

3031.0200

Temperature/ humidity sensor incl.
measuring converter 4...20 mA, in
shelter, electrically aspirated

3031.1200

Calibration and maintenance of the probe should be
performed at regular intervals, at least once a year or
more often, depending on the conditions of use and
desired accuracy.
Replacing of Sensor
Loosen fixation screw. Pull sensor out of its socket
and replace it by a new one. Sensor has to be
touched carefully, at its plastic shaft.

Connection plan
Versions 3031.0000 and 3031.1000
0,25 mm²
weiß /

white

Pt 100

braun / brown

Pt 100

grün /

green

Pt 100

gelb /

yellow

Pt 100

grau /

grey

rot /

red

Versorgungsspannung
Supply voltage
Ausgang r.F.
Output r.H.
Ausgang °C
Output °C
DIO

Pt 100
Kabel
Cabel

orange / orange
blau /

blue

violett / purpel

DIO

schwarz (schrumpf)
black (shrunk)
schwarz
black

Analog Masse
analogue ground
Digital Masse und Power
digital ground and power

0,25 mm²

Kabel
Cabel

+

weiß / white

12 VDC für Lüfter
12 V DC for fan

-

braun / brown

DIO = Digital Input / output;
used for calibration purpose, only, not used for normal operation!

3031.0000 BG

Combined Temperature/
Humidity Sensor in shelter

Page: 3 / 4

Versions 3031.0200 and 3031.1200; 4…20 mA
+U1

1 ws / white

+U3

3 gr / grey

+U2

2 br / brown
ws / white

gr / grey

V+

1
gn / green

3

ge / yellow

Feuchte
Sensor
Humidity
sensor

Messumformer
Temp.

Pt 100
bn / brown
ws / white

5
4

R L +I2
-U3
R +I1

-U2
-U1

Pin configuration:
ws/white
br/brown
gn/green
ge/yellow
gr/grey
rs/pink

L

1
2
3
4
5
6

+U1
+U2
+U3
+ I1
+ I2
- U3

rt / red

UA
GND

sw / black

Meas.
converter
Temp.

Externe Beschaltung
External circuitry

1

Schirm / shield

+ 3 Messumformer
Feuchte
-

4

Meas.
converter
Humidity

2

2
gn / green

ge / yellow

5 gn / green
6 sw / black
4 ge / yellow

(Supply meas. conv. humidity)
(Supply meas. conv. temp.)
(Supply humidity sensor)
(4...20 mA humidity)
(4...20 mA temp.)
(AGND humidity sensor)

+I1/+I2 measured against -U1/-U2
U1, U2 = 18...30 V DC (admissible load!).
U3
= 3,5...50 V DC (admissible load!).

Attention:
Power supply U1, U2 must be electrically
isolated from U3!

Cable Connector

2

2
8

1
6

4

5

5

4

3
7

Front side, female
socket

8

3
7

1
6

View on the solder termination side

3031.0000 BG

Combined Temperature/
Humidity Sensor in shelter

Page: 4 / 4

Dimensions for installation:

Top shield plate
Mounting special socket, M4
Thread rod, M5
Hole for fan cable

30

ø 8,5

ø 8,5

99

25

Technical data are subject to change!

THEODOR FRIEDRICHS & CO.

Meteorologische Geräte und Systeme GmbH

POB 1105 • D 22858 Schenefeld • Tel. (040) 839 600-0 • Fax (040) 839 600-18
Email: info@th-friedrichs.de • http://www.th-friedrichs.de


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