Lambrecht 15189 User manual

USER MANUAL
Precipitation Sensor
15189

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LAMBRECHT meteo |AEM | 15189
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Warranty
Please note the loss of warranty and non-liability by unauthorized manipulation of the system. You need a written
permission of the LAMBRECHT meteo GmbH for changes of system components. These activities must be
operated by a qualied technician.
The warranty does not cover:
1. Mechanical damages caused by external impacts (e. g. icefall, rockfall, vandalism).
2. Impacts or damages caused by over-voltages or electromagnetic elds which are beyond the standards and
specications in the technical data.
3. Damages caused by improper handling, e. g. by wrong tools, incorrect installation, incorrect electrical
installation (false polarity) etc.
4. Damages which are caused by using the device beyond the specied operation conditions.
Safety instructions
This system is designed according to the state-of-the-art accepted safety regulations. However, please note the
following rules:
1. Before setting into operation, please read all appropriate manuals!
2. Please take notice of internal and state-specic guidelines and/or rules for the prevention of accidents (e.g. the
professional association). If necessary ask your responsible safety representative.
3. Use the system according to the manual’s regulations only.
4. Always leave the manual at hand at the place of work of the system.
5. Use the system in technically correct conditions only! You have to eliminate inuences immediately which impair
the security .
6. Please note the loss of warranty and non-liability by unauthorized manipulation of the system. You need a written
permission of the LAMBRECHT meteo GmbH for changes of system components. These activities must be
operated by a qualied technician.
7. Prevent the ingress of liquids into the devices without permission.
Features
• Precipitation sensor for automatic weather stations
• Exchangeable, weighing tipping bucket system according to Joss-Tognini
• 2 cm³ (2 g water) tipping bucket for precise precipitation measuring in regions with normal rain falls
• 4 cm³ (4 g water) tipping bucket for precise precipitation measuring in regions with heavy rain falls/ tropical rain
• Connectable to external data logger
• Winter-t model 15189 H with electronically controlled 2-circuit heating
• Weatherproof materials (anodized aluminium, stainless steel) guarantee a long durability
• Funnel according to the WMO Standard No. 8

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Function
The weighing precipitation sensor 15189 works with a low-friction mounted tipping bucket according to Joss-Tognini.
Errors that normally occur due to incomplete draining because of surface tension are automatically compensated
by the specic form of the tipping bucket. The tipping bucket can hold 2cm³ (2 g) resp. 4 cm³ (4 g) of water. The
collecting surface of 200cm² (WMO standard) means that one bucket charge is equivalent to a precipitation rate
of 0.1mm resp. 0.2 mm per square meter. If the bucket is tipped, the reed contact that is integrated in the sensor will
be closed. This pulse output can be electrically scanned, remotely transmitted and recorded. A bounce-free signal
can be achieved by using the corresponding electrically connection. Otherwise the signal of the reed contact can be
used directly, not bounce-free, if this function will be carried out by an appropriate data logger (e. g. Ser[LOG]).
The precipitation sensor 15189 is mounted on a mast, whose outer diameter is 60 mm. For application in snowfall
regions the heater equipped model 15189 H ensures all year round measurement. Two separate controlled heating
circuits with lowest hysteresis are providing an optimal temperature at which snowing up of the sensor will normally
be prevented and evaporation from the heated surfaces will be minimized. The precipitation sensor 15189 is made
of weather-resistant aluminium and stainless steel. This ensures a long durability. These high-quality precipitation
sensors comply with the regulations WMO.
Dimensional drawing

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Installation
MOUNTING OF THE PRECIPITATION SENSOR
The precipitation sensor 15189 must be mounted on a tube or pole with an outside diameter of 60 mm. A metallic
extension tube with a minimum length of 100 mm is recommended, if a wooden pole is used. For easy adjustment
place a spirit-level on the upper measuring edge.
Attention! Do not damage the measuring edge!
Place the precipitation sensor 15189 on the end of the pole until it ts in.
By using the provided allen key (4 mm) , tighten the screws in the mounting pedestal evenly. Adjust the upper
measurement edge to an exact horizontal position. By doing this, the tipping bucket will automatically be positioned
vertically inside the device and will works symmetrically.
DISMOUNTING OF THE PROTECTIVE COVERING
Loosening the screw with the provided 3 mm allen key until the protective covering can be turned right to the stop
position and take o upward then.
ASSEMBLY OF THE TIPPING BUCKET
To avoid damage to the tipping bucket during transport, it is separately packed and should be inserted in
the precipitation sensor (15189) on site only after mounting the gauge on the mast. For the assembly rst you
must remove the protective covering.
Attention! When tting the tipping bucket, proceed with utmost caution so that the sharp edges of the
tipping bucket are not damaged and the middle wall is not bent!
During operation the tipping bucket lies on the precision bucket bearings. To reduce the friction the bearingsare
made of abrasion-resistant delrin. The mounted tipping bucket is secured against eventual changes of position by
means of two plates.
To insert the tipping bucket, rst the relocatable locking plate C must be pushed back. Now insert the tipping bucket
F. Make sure that the magnet Eattached at the middle wall of the tipping bucket rests under the capsule with the
embedded reed contact D. Finally the tipping bucket must be secured by pushing back the relocatable locking
plate C.

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Messkante
Measuring edge
Schutzmantel
Protective covering
Befestigungsschraube
Fastening screw
Montagesockel
Mounting pedestal
Montagemast
Pole/tube
Innensechskant-
schlüssel
Hexagon key
zu auf
close open
Beim Montieren des Schutzmantels achten Sie bitte darauf, dass das Schild „close <-- -->
open“ (zu < - > auf) über der Fixierschraube positioniert wird. Besonders bei der beheizten
Variante ist auf diesen Schritt zu achten. Dadurch wird vermieden, dass die Kabel der
Schutzmantel-Heizung die Wippe blockieren könnten.
Einsetzen Entfernen
Insert Remove A: Tipping bucket bearings
B: Fixed locking plate
C: Relocatable locking plate
D: Reed contact
E: Magnet (here shown through inclination of the bucket)
F: Tipping bucket
MOUNTING OF THE PROTECTIVE COVERING
When mounting the protective covering, please make
sure that the sign “close <-- --> open” (close < - > to) is
positioned above the xing screw. Especially when using
the heated version you have to pay attention to this step.
This avoids that the cable of the protective covering
heating may block the tipping bucket.
Attention! In order to protect the tipping
bucket the dirt spiral must be inserted in the
collecting funnel.
E
F

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Electrical connection
The sensor will be connected to the cable by leading the cable through the conduit gland to the connector inside the
sensor housing. Recommended cable type:
2 (4) x AWG 2O CU L sw;
diameter approx. 5.1 mm
The cable should not be longer than 11 m.
When the cable is transferred inside the ground it is recommended to protect the cable with a protecting
plastic tube.
USE OF THE BOUNCE-FREE OUTPUT SIGNAL (SEE FIGURE PAGE 8)
The usual circuit of the precipitation sensors is suitable for connection to data loggers without an own bounce-free
impulse input. For this application the clamps 3 and 4 are used.
Make sure, that the current supply for the precipitation sensor with usual circuit is not less than 100 µA (see also
technical data).
USE OF THE DIRECT OUTPUT SIGNAL (SEE FIGURE PAGE 9)
This circuit variant of the precipitation sensors is suitable for connection to data loggers with a bounce-free impulse
input. For this application the clamps 1 and 6 are used. In this case the current supply of the electronics with 100 µA
is not necessary. The LAMBRECHT meteo data logger TROPOS is equipped with such a bounce-free input. Thus the
direct output signal of the reed contact is used. An additional benet is a low-current eect.
VERSION WITH HEATING 15189 H
Version i. e. with a controlled 2-circuit heating for collecting funnel and drain pipe.
ELECTRICAL CONNECTION OF THE HEATING
For the connection of the heating a 4-core cable is required, which has to apply and connect to the power supply unit
according to the connecting diagrams with heating.
The function of the heating elements can be tested also at ambient temperatures above the control temperature
of the solid-state thermostat. For this simple test a regular magnet has to be held close to the blue housing of the
switching circuit. When reaching a surface temperature of approximately 50 °C the current will be switched o.
Both blue thermostat modules are tted internally on the funnel surface as well
as on the bottom of the housing. The operational conditions will be indicated
with colored light-emitting diodes (LED) on the thermostatic module:
green: supply voltage
red: heating on
red
green

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Initial operation
If the sensor system has been completely mounted and electrically assembled, the sensor will be ready for
operation. An operational check has to be performed.
Maintenance and operational check
The precipitation sensor is nearly maintenance-free. The sensor should be checked and cleaned periodically in order
to guarantee its proper operation, because dirt accumulation may cause errors of measurement. The time interval of
cleaning depends on the local conditions.
The operational check of the sensor may be performed by the use of articial precipitation. The volume of a 200 cm³
resp. 400 cm³ (by 4 cm³ buckets ) test container of water must be piped into the collecting funnel through a nozzle
in such a way that the drops fall into the funnel beside the outlet. The nozzle of the test container (approx. diameter
0.6 mm) should be adjusted to allow a complete water run out into the funnel within 10 to 12 minutes. After the articial
precipitation has gone through, 100 ± 2 bucket tippings should have counted.
Rinse the sensor thoroughly for cleaning. Clinging particles of dirt in the collecting funnel or outlet pipe may be
removed with a piece of wood. If unsatisfying measurement results occur after this cleaning procedure, the tipping
bucket should be disassembled for cleaning.
Absolute care must be taken not to damage the tipping bucket!
The dismounted tipping bucket can be cleaned by placing it in warm water with some scouring material and by
carefully scraping o unwanted dirt by using a small piece of wood.
Disposal
LAMBRECHT meteo GmbH is listed and registered at the Stiftung Elektro-Altgeräte Register ear under:
WEEE-Reg.-Nr. DE 45445814
In the category of monitoring and control instruments, device type: “Monitoring and control instruments for
exclusively commercial use”.
Within the EU
The device has to be disposed according to the European Directives 2002/96/EC and 2003/108/EC
(Waste Electrical and Electronic Equipment). Do not dispose the old device in the household waste!
For an environmentally friendly recycling and disposal of your old device, contact a certied disposal
company for electronic waste.
Outside the EU
Please follow the regulations in your country regarding the appropriate disposal of waste electronic equipment.

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with heating without heating
CONNECTING DIAGRAMS FOR USE OF THE BOUNCE-FREE SIGNAL OUTPUT

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LAMBRECHT meteo |AEM | 15189
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with heating without heating
CONNECTING DIAGRAMS TO DATA LOGGER TROPOS

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
ID 00.15189.002000
Measuring principle weighing tipping bucket designed acc. to Joss-Tognini
Measuring range 2 cm³ (2 g water); volume of bucket 0...8 mm/min
Resolution 0.1 mm
Accuracy ± 2 % with intensity correction *)
Range of application 0...+70 °C measuring
Pulse output reed contact; reverse polarity protected; debounced signal
Current consumption max. 100 µA; typically 50 µA
Supply voltage 4...30 VDC
Switching load max. 30 VDC/ 0.5 A
Dimensions see dimensional drawing
Mounting Ø 60 mm
Weight approx. 3.0 kg
Standards WMO-No. 8; VDI 3786 Sheet 7; EN 50081/82; VDE 0100


ID 00.15189.004000
Measuring range 4 cm³ (4 g water); volume of bucket 0...16 mm/min
Resolution 0.2 mm
3

ID 00.15189.402000
Heating data electronically controlled; 2 heating circuits
Accuracy 4 °C ± 2 °C control temperature in the range of -20...+4 °C
Heating capacity 80 W (funnel); 70 W (outlet/ tipping bucket)
Supply voltage 24 VDC/ 150 W
Range of application -20...+70 °C (no icing, no snowdrift)
3

ID 00.15189.404000
Technical data

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Photo copyright: © Tui yong nian - Adobe stock
Copyright © 2023 LAMBRECHT meteo GmbH. All rights reserved.
Information in this document subject to change without notice.
LAMBRECHT meteo GmbH Tel [phone]
Friedländer Weg 65-67 Fax [phone]
37085 Göttingen E-Mail [e-mail]
Germany Internet www.lambrecht.net
page –11
ID General accessories
00.15180.400000 Stainless steel mast for concrete/earth foundation
00.15180.800050 Stainless steel mast for concrete foundation (with base plate)
32.15180.021010 Bird defense ring
33.15180.049000 Dirt pan (spare part)
32.15188.060090 Connection cable sensor/ data acquisition; 2-core; L=7 m
ID Accessories for versions with heating (H versions)
00.14966.200000 Power supply unit
32.15188.061020 Connecting cable sensor/ power supply unit; for mast mounting; 4-core; L ≈ 1 m
32.14622.220000 Holder for power supply unit on the mast
32.15188.061090 Connection cable sensor/ power supply unit; 4-core; L = 7 m
*) The intensity compensation is not done in the sensor but in the data logger, e.g. Ser[LOG], met[LOG].
Accessories