HyQuest Solutions PreciBal User manual

PreciBal
User Manual

© 2022 HyQuest Solutions 2
Table of Contents
I Disclaimer 4
II Safety Instructions 5
Part I Introduction 6
1.1 Measurements and Data Processing ......................................................................................................... 6
1.2 Interfaces ........................................................................................................................................................... 6
1.3 Models and Catching Areas ........................................................................................................................... 7
1.4 Measurement of Precipitation Amount .................................................................................................... 7
1.5 Generating Pulses on the Contact Output ................................................................................................ 8
1.6 Measurement of Rain Intensity .................................................................................................................. 8
1.7 Measurement of Bucket Content ................................................................................................................ 8
1.8 Measurement of Temperature ..................................................................................................................... 8
Part II Installation 10
2.1 General Requirement ................................................................................................................................... 11
2.2 Preparing the Precipitation Gauge for Mounting ............................................................................... 11
2.3 Mounting the Precipitation Gauge on the Pedestal ........................................................................... 11
2.4 Mounting the Precipitation Gauge on a Pole Using the Pole-Mounting Adapter ..................... 11
2.5 Finishing installation .................................................................................................................................... 12
Part III Configuration 13
3.1 Interfaces ......................................................................................................................................................... 13
3.2 External Connection ...................................................................................................................................... 13
Part IV Operation 14
4.1 Data Communication .................................................................................................................................... 14
4.1.1 SDI-12 ........................................................................................................................................................ 16
4.1.2 RS-485 ....................................................................................................................................................... 34
4.1.3 All Summary of Data and Value Ranges summary ....................................................................... 35
4.2 Diagnosis ......................................................................................................................................................... 38
4.2.1 SDI-12: Sensor Diagnosis ..................................................................................................................... 38
4.2.2 RS-485: Sensor Diagnosis .................................................................................................................... 39
Part V Maintenance 40
5.1 Emptying the Bucket .................................................................................................................................... 40
5.2 Visual Check .................................................................................................................................................... 40
5.3 Cleaning ............................................................................................................................................................ 41
5.4 Heater Check .................................................................................................................................................. 41
5.5 Adding Antifreeze ......................................................................................................................................... 41
5.6 Checking Horizontal Position .................................................................................................................... 41
5.7 Checking Accuracy of Measurement ....................................................................................................... 41

© 2022 HyQuest Solutions 3
Part VI Repair 43
Part VII Technical Data 44
Part VIII Obligations of the Operator and Disposal 46
8.1 Obligations of the Operator ....................................................................................................................... 46
8.2 Dismantling / Disposal ................................................................................................................................ 46
Part IX Appendices 48
9.1 HyQuest Solutions HS PreciBal (RainBal) App ..................................................................................... 48
9.1.1 PreciBal/RainBal App Functionality in a Nutshell ......................................................................... 48
9.1.2 Precibal/RainBal App – User Interface ............................................................................................. 48

Copyright Notice: No parts of this work may be
reproduced in any form or by any means without the
written permission of the publisher. HyQuest
Solutions waives copyright for users to print out
parts of the documentation in hard copy for their
own use only.
Trademark Notice: HyQuest Solutions (HS) and
KISTERS products and services referred to in this
document are trademarks or registered trademarks
of HyQuest Solutions or KISTERS AG. Other product
names used may or may not be the trademarks of
their respective owners.
© 2020 HyQuest Solutions, a KISTERS Group
Company. Any rights not expressly granted herein
are reserved.
The information provided in this manual was deemed
accurate as of the publication date. However, updates
to this information may have occurred.
This manual does not include all of the details of
design, production, or variation of the equipment
nor does it cover every possible situation which may
arise during installation, operation or maintenance.
HyQuest Solutions shall not be liable for any
incidental, indirect, special or consequential damages
whatsoever arising out of or related to this
documentation and the information contained in it,
even if HyQuest Solutions has been advised of the
possibility of such damages.
Any errors found in any HyQuest Solutions product
should be reported to HyQuest Solutions where
every effort will be made to quickly resolve the
problem.
This document is public.
4© 2022 HyQuest Solutions
I Disclaimer

§ Read the user manual including all operating instructions prior to installing, connecting and powering up the HyQuest
Solutions PreciBal. The manual provides information on how to operate the product. The manual is intended to be
used by qualified personnel, i.e. personnel that have been adequately trained, are sufficiently familiar with
installation, mounting, wiring, powering up and operation of the product.
§ Keep the user manual on hand for later reference!
§ If you encounter problems understanding the information in the manual (or part thereof), please consult the
manufacturer or its appointed reseller for further support.
§ HyQuest Solutions PreciBal is intended to be used in hydrometeorological or environmental monitoring applications.
§ Before starting to work, you have to check the functioning and integrity of the system.
§ Check for visible defects on the PreciBal, this may or may not include any or all of the following mounting facilities,
connectors and connections, mechanical parts, internal or external communication devices, power supplies or
power supply lines, etc.
§ If defects are found that jeopardize the operational safety, work must be stopped. This is true for defects found
before starting to work as well as for defects found while working.
§ Do not use the HyQuest Solutions PreciBal in areas where there is a danger of explosion.
§ The present user manual specifies environmental/climatic operating conditions as well as mechanical and electrical
conditions. Installation, wiring, powering up and operating the HyQuest Solutions PreciBal must strictly comply with
these specifications.
§ Perform maintenance only when tools or machinery are not in operation.
§ If guards are removed to perform maintenance, replace them immediately after servicing.
§ Never make any electrical or mechanical diagnostics, inspections or repairs under any circumstances. Return the
sensor to the manufacturer’s named repair centre. You can find information on how to return items for repair in the
relevant section of the HyQuest Solutions web site.
§ Disposal instructions: After taking the HyQuest Solutions PreciBal out of service, it must be disposed of in
compliance with local waste and environmental regulations. The HyQuest Solutions PreciBal is never to be disposed in
household waste!
§ Inputs and outputs of the device are protected against electric discharges and surges (so-called ESD). Do not
touch any part of the electronic components! If you need to touch any part, please discharge yourself, i.e. by touching
grounded metal parts.
§ WARNING: A full bucket can be very heavy, it can weigh more than 25 kg! Be careful while emptying the
bucket! Accidentally dropping the bucket on the load cell can damage the sensor.
§ RoHS Compliance Statement: The instruments are in conformity with Directive 2015/863/EU on the restriction
of the use of certain hazardous substances in electrical and electronic equipment.
II Safety Instructions
© 2022 HyQuest Solutions 5

© 2022 HyQuest Solutions 6
Introduction
1Introduction
Thank you for choosing our product. We hope you will enjoy using the device.
HyQuest Solutions manufactures, sells, installs and operates quality instrumentation, data loggers and communication
technology. Products are designed with passion for environmental monitoring and with a deep understanding of the
quality, accuracy and robustness needed to fulfil the requirements of measurement practitioners in the field.
The present User Manual will help you understand, install and deploy the device. If, however, you feel that a particular
information is missing, incomplete or confusing, please do not hesitate to contact us for further support!
The HS PreciBal is a precipitation gauge based on a weighing principle with totalisation collecting principle. The amount
and the intensity of rainfall is determined by collecting liquid, mixed and solid precipitation in a bucket and by the
continuous measuring of weight increments. Sophisticated algorithms are implemented to suppress impact of
temperature fluctuations, vibrations caused by wind, or evaporation.
The heated version is equipped with a rim heater to prevent snow accumulation on the rim and to avoid snow capping
and/or ice accretion inside the rim which could result in the decrease of catching area.
An antifreeze such as propylene glycol is used to decrease the freezing point when collecting solid precipitation.
Propylene glycol is a water-based, non-toxic Polymer to be used in totalisator weighing precipitation gauges that are
especially used for collecting mixed and solid precipitation. The collected solid precipitation will turn from solid into liquid
by the decreased freezing point instead of using electrical energy as usually required for heated tipping bucket gauges.
The use of an antifreeze allows for lower power consumption in locations where there is no mains power, but which are
powered by batteries or solar panels. This combination of antifreeze and heating is applicable, for example, at locations at
higher altitudes with moderately humid ambient conditions. With this intelligent power supply to heat the rim at low
power consumption, the formation of ice build-up and snow caps is prevented.
Note: It is not required to add synthetic oil on top of the pre-filled mix of antifreeze and water.
In general, the model PreciBal 314 with its wider orifice is ideal for high mountain application with or without utilizing the
rim heater.
§ Measurements and Data Processing
§ Interfaces
§ Models and Catching Areas
§ Measurement of Precipitation Amount
§ Generating Pulses on the Contact Output
§ Measurement of Rain Intensity
§ Measurement of Bucket Content
§ Measurement of Temperature
1.1 Measurements and Data Processing
Principal measurements provided by HS PreciBal are:
§ Amount of precipitation registered since previous reading
§ Total amount of precipitation (since power-on)
§ Amount of precipitation registered during current or previous precipitation
§ Precipitation intensity
§ Temperature (internal or ambient, depending on configuration)
§ Weight of the bucket content
§ Status values (e.g. heater on/off, 80% of bucket capacity reached
The measurement of the precipitation amount is based on continuously measuring the weight of the bucket content. One
measurement cycle takes 10 seconds. At the end of each cycle all measured values are updated and prepared to be sent
using a communication protocol. Any value can be read in any period greater or equal 10 seconds. Because of the
algorithm implemented it can take up to 120 seconds to register complete amounts of precipitation fallen into the bucket,
mainly depending on precipitation intensity and wind.
1.2 Interfaces
PreciBal is equipped with the SDI-12 version 1.4 serial interface, RS 485 and a contact voltage-free pulse output for
emulation of a tipping-bucket rain gauge. RS-485 various protocols can be used, e.g. MODBUS RTU, MODBUS ASCII. For
comfortable maintenance work the Bluetooth LE and USB-over-Bluetooth interface is available.
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Introduction
1.3 Models and Catching Areas
Two different models with 200 and 314 cm2orifice area with optional rim heater are available for specific regions with
standard orifices standardized upon by the National weather services.
PreciBal 200 and PreciBal 200-RH: EU, LATAM, Canada, Africa, Russia-CIS
PreciBal 314 and PreciBal 314-RH: US, China, Asia-Pacific, Australia and New Zealand
Model
PreciBal 200
PreciBal 200-RH
PreciBal 314
PreciBal 314-RH
Orifice area [cm2]
200
200
314
314
Diameter in mm / inch
160 / 6.4
160 / 6.4
200 / 7.9
200 / 7.9
Bucket capacity [l]
30
30
30
30
Approximate amount of precipitation for full
bucket [mm]
1500
1500
1000
1000
1.4 Measurement of Precipitation Amount
Three principal amounts of precipitation are calculated (see figure PR, PRTOT and PRLAST ):
PR
Amount of precipitation registered since previous reading.
At power-up he value of PR is set to zero. At the end of each 10-second measurement cycle the
precipitation amount registered during that cycle is added to the PR value. After reading by
aM!/aD0! command pair the value of PR is set to zero.
Note: The value is not set to zero if read by MODBUS protocol!
PRTOT
Total amount of precipitation.
At power-up he value of PRTOT is set to zero. At the end of each 10-second measurement cycle
the precipitation amount registered during that cycle is added to the PRTOT value. The value is
never set to zero while the PreciBalRainBal is running continuously.
PRLAST
Amount of precipitation registered during current or previous precipitation.
At power-up the value of PRLAST is set to zero. At the end of each 10-second measurement
cycle the precipitation amount registered during that cycle is added to the PRLAST value. The
value is set to zero if after a period of ten or more minutes with no precipitation it begins to
rain (or snow). In other words: while it is raining the PRLAST is equal to the precipitation fallen
from the beginning of current rain. After it has stopped raining the PRLAST remains unchanged
thus it's equal to the precipitation fallen during previous rain. At the beginning of the next rain
PRLAST is set to zero.
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Introduction
Figure 1 – PR, PRTOT and PRLAST
1.5 Generating Pulses on the Contact Output
At the end of each 10-second measurement cycle the PreciBal begins generating a series of pulses. The count of the pulses
corresponds to the precipitation amount registered during that cycle and depends on the value of the IMPRATIO
parameter (the amount of precipitation corresponding to one pulse). If there is not enough time to generate all pulses
during one measurement cycle, the remaining pulses will be accumulated and sent during following cycles.
1.6 Measurement of Rain Intensity
A Precibal rain gauge provides two rain intensity values: RIINST and RI. The value of RIINST represents an estimate of the
instantaneous rain intensity calculated from the increase of the bucket content weight during one measurement cycle. The
RIINST reacts quickly to the changes in real rain intensity. On the other hand the value of RI is the rain intensity calculated
from one-minute data.
1.7 Measurement of Bucket Content
The value of WAVG represents a filtered weight of the bucket content including weight of the bucket itself.
1.8 Measurement of Temperature
In the standard version a PreciBal precipitation gauge, the electronic thermometer is placed inside the electronic unit
housing. T, thus, represents the inside temperature. An external thermometer can be used instead of the internal one to
measure the real ambient air temperature. The additional temperature values (TAVG, TMIN, TMAX) are one-minute values.
Heated version PreciBal 200-RH/314-RH
The heater is powered by a separate power supply and is switched on automatically if the temperature falls below a
preset threshold. The heating supply voltage can range from 10 to 30 VDC. The heating power depends on the voltage,
there is no power regulator.

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Introduction
The heated PreciBal model is equipped with an orifice rim heater to prevent snow and/or frost from accumulating on the
rim. The heater is powered from a separate power supply and is switched on automatically if the temperature falls below
a preset threshold. The heating supply voltage can range from 10 to 30 VDC. The heating power depends on the voltage,
there is no power regulator.
Heating Mode 1
The heating can operate in one of four modes depending on the value of the HEAT parameter. Modes 0(permanently off)
and 1(permanently on) are intended mainly for maintenance purposes, in modes 2and 3the heater is switched on or off
automatically depending on the internal or ambient air temperature and the value of THEAT parameter.
Heating Mode 2
The heater is switched on if the temperature falls below the value of the THEAT parameter and switched off if the
temperature rises above THEAT + 1°C. The factory preset value of THEAT is +4 °C.
Heating Mode 3
This mode can be used to save the heating energy. It is the same as mode 2 except that the heater is only switched on if
precipitation is being detected. This allows the use of solar power packages and/or batteries during the winter period. In
this case we do highly recommend to monitor and control the battery capacity by the connected data logger to measure
battery voltage and current. In this case it is required that the logger is equipped with a relay to switch and connect the
heater battery to the Heater terminals of the instrument.
Further support and consulting on request to depend on geographical location and altitude of the site.

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Installation
2Installation
See the separate PreciBal installation guide that is included in the scope of delivery and can be downloaded from the
website.
Measuring Heights and Installations from 1.0 to 1.5 m
PreciBal can be mounted on a 2" threaded pole with ground plate corresponding to the HS TB series. In addition, a
mechanical mount bracket HS 334 is required (3-point to inner threaded 2” pipe adapter).
See mounting Instructions: HS 334 Multi Adapter for PreciBal.
Pos 1: Rim
Pos 2: Pipe house/enclosure
Pos 3: Collecting bucket
Pos 4: Triangular Support for bucket
Pos 5: Electronic unit housing
Pos 6: Base plate
Pos 7: Load cell with transportation screws
Pos 8: HS 334 Multi Adapter 3-point to 2” adapter
(installation heights from 1 to 1,5 m)
Pos 9: Threaded pipe 2"
Pos 10: Ground plate
Pos 11: 3-point to 4” adapter (installation heights from 1 to 3
m)
Pos 12: Heater connector
Pos 13: Funnel
Pos 14: Balance weight
Pos 15: Heater (optional)
Pos 16: Spirit level
Top view of the measuring unit for PreciBal precipitation
gauge:
Figure 2 – Overview of sub-assemblies
Sub-assembly position 11: See Mounting instruction: 3-point to 4”pole adapter for PreciBal.

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Installation
Measuring height PreciBal with HS 334X adapter
Pos 9: Length 2“ threaded pipe
1.0 m
300 mm
1.5 m
800 mm
Measuring Heights and Installations from 1.0 to 3 m
PreciBal can be mounted on a 4" threaded pole with ground plate. In addition, a mechanical mount bracket HS 334X is
required (3-point to inner threaded 4” pipe adapter).
Consult these chapters for installation instructions.
§ General Requirement
§ Preparing the Precipitation Gauge for Mounting
§ Mounting the Precipitation Gauge on the Pedestal
§ Mounting the Precipitation Gauge on a Pole Using the Pole-Mounting Adapter
§ Finishing installation
2.1 General Requirement
The site for installing a precipitation gauge should be open but not too windy. The distance from the gauge to any
surrounding object should be at least twice the height of the object above the gauge orifice. As for the height of the orifice
please follow local regulations and/or requirements. The most commonly used height varies between 1.0 and 1.5 m
above the surrounding terrain. In any case the orifice must be placed above the maximum expected depth of snow cover.
Avoid installing the precipitation gauge on a slope or the roof of buildings.
Mounting the Pedestal
1. Prepare a concrete base and attach three M8 bolts to it (e.g. use wall plugs and hanger bolts).
2. Screw three M8 nuts onto the bolts and place the ground plate (10) of the threaded pipe (9) on them (see figure
Overview of sub-assemblies ). Note: The ground plate is round but the HS 334 Multi-Adapter (8) is triangular.
3. Make the upper (instrument) flange (8) of the pedestal horizontal using a spirit level in two directions perpendicular to
each other. Fix the pedestal using another 3 nuts and washers. Do not tighten the nuts yet.
2.2 Preparing the Precipitation Gauge for Mounting
Detach the enclosure (2) from the rain gauge base plate (6) loosening the screws at the bottom edge of the enclosure.
Remove the bucket (3) from the base plate.
2.3 Mounting the Precipitation Gauge on the Pedestal
Attach the base plate (6) to the pedestal using three M8 screws. Place a spirit level on two ends of the support triangle (4)
and adjust the level with the lower flange nuts if necessary. Place the spirit level on another two ends of the support
triangle and repeat the procedure. Now tighten the nuts thoroughly.
2.4 Mounting the Precipitation Gauge on a Pole Using the Pole-Mounting
Adapter
Set the mounting adapter (8 or 11) on the pole. Do not tighten the fixing screws yet. Attach the base plate (6) to the
adapter using three M8 screws. Now level the base plate (6) using a spirit level and fixing screws of the adapter. Place the
spirit level on two ends of the support triangle (4) or use the built-in spirit level (17) of the precipitation gauge. Finally
tighten the fixing screws of the mounting adapter.
For more details, see the separate installation instructions on 3-point to 2“- and 3-point to 4“ adapter with installation
poles and ground plate for mounting onto concrete.
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Installation
2.5 Finishing installation
1. A classical precipitation gauge is fitted with two transport screws and a transport bracket to prevent damage of the
load cell during transport (see figure Transportation bracket ). Loosen both screws so that there is a space of at
least 1 millimetre between the tip of the screw and the body of the gauge (or the load cell, depending on PreciBal
model). Remove the transport bracket.
2. Put back the bucket (3) and the enclosure (2). Mind the right position of the enclosure: the male part of the heating
connector has to be plugged into the female one located at the base plate of the rain gauge. Fix the enclosure
tightening the screws around the lower edge.
3. Use your finger to check if the rain gauge has been assembled correctly: the rim of the enclosure must not touch the
bucket!
Figure 3 – Transportation bracket
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Configuration
3Configuration
This chapter contains the following subsections:
§ Interfaces
§ External Connection
3.1 Interfaces
PreciBal is equipped with the SDI-12 version 1.4 serial interface, RS 485 and a contact voltage-free pulse output for
emulation of a tipping-bucket rain gauge. RS-485 various protocols can be used, e.g. MODBUS RTU, MODBUS ASCII. For
comfortable maintenance work the Bluetooth LE and USB-over-Bluetooth interface is available. The serial interfaces are
both equipped and can be selected by interface and protocols. Both interfaces cannot be operated simultaneously.
By default the interface is set to SDI-12 V1.4.
Possible interface settings
Protocol
SDI-12
MODBUS
ASCII
Interface
Settings
Address
Settings
Address
Settings
Address
SDI-12
1200,7,E,1
0
N/A
N/A
N/A
N/A
RS-485
9600,8,N,1
0
9600,8,E,1
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9600,8,N,1
0
The pulse output is available in metric and imperial units with different pulse factors. Here the behaviour of a reed
contact is simulated, which is usually integrated in tipping bucket rain gauges.
The pulse output is working simultaneously to any selected interface and protocol and can also be used as redundant
output to be connected to a second device.
For changing the interface or other parameters, please use the app available for IOS and android smart phones.
More information see installation guide.
3.2 External Connection
See the separate PreciBal installation guide that is included in the scope of delivery and can be downloaded from the
website.
On the bottom side of the base plate there is a M12-8pol and M12-4pol (Heated version) connectors with cap to utilize
and connect the delivered cable cables. The bar ends or open wires have to connected to the corresponding terminals of
the data logger, AWS or SCADA system. A standard length of the cables is 10 meters but a cable of customs and site
specific length can be ordered upon request.
The maximun length for the cables is 15 m for M12 SAC-4pol (heater cable) and 50 m for M12-8pol (instrument supply
and interfaces).
Please use the APP to switch to RS 485 mode or other settings.
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Operation
4Operation
This chapter contains the following subsections:
§ Data Communication
§ Diagnosis
4.1 Data Communication
Communication modes:
§ Standard: SDI-12, Version 1.4, default address is ‘0’.
§ Optional: RS-485: 9600bps, 8bit, no parity, 1 stop bit, default address is '0' – Modbus RTU and Modbus ASCII.
Protocols
PreciBal 200
PreciBal 314
SDI-12, Version 1.4
X
X
RS 485 Modbus
X
X
Table 1 – Protocols
The communication mode is preset to SDI-12.
Independent of the communication protocol in use, PreciBal stores all data in so-called “Registers”. All measured and
status values and parameters are stored in the registers. The table Protocols describes the most important registers
that the user needs in order to work with the sensor.
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Operation
Register acronym
Description
PR
Precipitation amount between two readings (SDI 12) M” command), aGer reading value is reset
PRTOT*
Precipitation amount from power ON, or reset up to 999.99mm
PRLAST*
Precipitation amount of present or and last precipitation event, used for
validation with weight or water and APP and SDI12.
WAVG*
Total weight of bucket
PRINST**
Instant precipitation between two readings with “M” command, delay is max. 10 sec.
RI**
Instant 10-sec rain intensity express in mm/h
PRcor
Corrected PR value
PRtot
Corrected PRTOT value
T
Temperature
TMIN
1-minute temperature minimum
TMAX
1-minute temperature maximum
TAVG
1-minute temperature average
U
Power supply
WS
Wind speed estimation used for corrected data
HEAT
Heating mode: 0 ~ heating OFF, 1 ~ heating ON, 2 ~ heating ON when temperature (‘T’) is below
THEAT, 3 ~ heating ON when temperature (‘T’) is below THEAT and it rains
THEAT
Parameter: heating temperature threshold
IMRATIO
Parameter: precipitation that equals one pulse
Table 2 – Description of Registers
Note:
* For more information on how these values vary in time, refer to figure PRTOT, PRLAST and WAVG – graphical view of
variations in time .
** For more information on how these values vary in time, refer to figure RI and 1-minute precipitation – graphical view
of variations in time .
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Operation
Figure 4 – PRTOT, PRLAST and WAVG – graphical view of variations in time
Figure 5 – RI and 1-minute precipitation – graphical view of variations in time
Follow the links for further information.
§ SDI-12
§ RS-485
§ All Summary of Data and Value Ranges summary
4.1.1 SDI-12
Only the most important commands are described here. For more information on SDI-12 protocol please visit www.sdi-
12.org. In all examples in this section arepresents a sensor address and ccc the 3 character CRC code, appended if data
was requested with the aMC!, aRC! etc. command.
§ General SDI-12 Commands
§ SDI-12 Measurement Commands (Metric Units)
§ SDI-12 Measurement Commands (Imperial Units)
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Operation
§ SDI-12 Reading Status Commands
§ SDI-12 Verification
§ SDI-12 Settings
§ SDI-12 Sensor Maintenance (Extended) Commands
§ SDI-12 Commands
4.1.1.1 General SDI-12 Commands
Address query
Command:
?!
Response:
a<CR><LF>
Explanation:
a
the sensor address
Example:
?!0<CR><LF>
Change address
Command:
aAb!
Response:
b<CR><LF>
Explanation:
a
the original address
b
the new address
Example:
0A3!3<CR><LF>
Send identification
Command:
aI!
Response:
a14HYQUESTPRECIB1011400,SN=2595<CR><LF>
Explanation:
HYQUEST
company name
PRECIB10
sensor model
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Operation
Send identification
11400
sensor version (1.14.00)
SN=2595
serial number
4.1.1.2 SDI-12 Measurement Commands (Metric Units)
Basic data (amount of precipitation and weight)
Start measurement
Command:
aM!
aMC!
Response:
a0003<CR><LF>
Send data
Command:
aD0!
Response:
a+PR±WAVG+PRTOT<CR><LF>
a+PR±WAVG+PRTOTccc<CR><LF>
Explanation:
PR
amount of precipitation registered since previous reading [mm]
WAVG
weight of the bucket content [g]
PRTOT
total amount of precipitation [mm]
Example
0M!00003<CR><LF>
0D0!0+0.130+2893.481+116.443<CR><LF>
0MC!00003<CR><LF>
0D0!0+2.5+49.074+2.5Dsk<CR><LF>

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Operation
Precipitation intensity and last or current rain precipitation amount
Start measurement
Command:
aM1!
aMC1!
Response:
a0003<CR><LF>
Send data
Command:
aD0!
Response:
a+PRLAST+RIINST+RI<CR><LF>
a+PRLAST+RIINST+RIccc<CR><LF>
Explanation:
PRLAST
amount of precipitation registered during current or previous precipitation [mm]
RIINST
instantaneous precipitation intensity [mm/h]
RI
one-minute precipitation intensity [mm/h]
Example
0M1!00003<CR><LF>
0D0!0+3.794+2.5+1.3<CR><LF>
0MC1!00003<CR><LF>
0D0!0+2.5+0+0BrY<CR><LF>
Temperature and service data
Start measurement
Command:
aM2!
aMC2!
Response:
a0006<CR><LF>

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Operation
Temperature and service data
Send data
Command:
aD0!
Response:
a±T±TMIN±TAVG±TMAX+U+STATUS<CR><LF>
a±T±TMIN±TAVG±TMAX+U+STATUSccc<CR><LF>
Explanation:
T
temperature [°C]
TMIN
one-minute temperature minimum value [°C]
TAVG
one-minute temperature average value [°C]
TMAX
one-minute temperature maximum value [°C]
U
internal power supply voltage [V]
STATUS
various status data [-]
Example
0M2!00006<CR><LF>
0D0!0+10.80+10.80+10.80+10.81+3.327+1<CR><LF>
0MC2!00006<CR><LF>
0D0!0+21.85+21.84+21.85+21.85+3.306+1DmY<CR><LF>
Corrected precipitation amount data
Start measurement
Command:
aM3!
aMC3!
Response:
a0003<CR><LF>
Send data