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GHM Delta OHM HD2013 Operating Manual

Tipping bucket rain gauge
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Operating manual
Tipping bucket rain gauge
HD2013
www.deltaohm.com
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Summary of Contents for GHM Delta OHM HD2013

  • Page 1 English Operating manual Tipping bucket rain gauge HD2013 www.deltaohm.com Keep for future reference.

  • Page 2: Table Of Contents

    TABLE OF CONTENTS INTRODUCTION ....................3 TECHNICAL SPECIFICATIONS ................4 INSTALLATION ..................... 7 ..................7 LECTRICAL CONNECTIONS ............... 10 ONFIGURATION OF ANALOG OUTPUT ....................11 IPPING BUCKET ..................12 NSTALLATION MODES SERIAL COMMANDS .................... 15 SDI-12 PROTOCOL ....................21 MAINTENANCE ....................28 INSTRUMENT STORAGE ..................

  • Page 3: Introduction

    1 INTRODUCTION The HD2013 is a reliable and sturdy tipping bucket rain gauge, built entirely from cor- rosion resistant materials in order to guarantee its durability. So as to ensure accurate measurement even with low temperature climatic conditions or during and after pre- cipitations of snow, a version with heating which is automatically activated around +4 °C has been developed so that snow deposits and ice formations are prevented.

  • Page 4: Technical Specifications

    2 TECHNICAL SPECIFICATIONS Power supply basic version --- with heating 12 or 24 Vdc ± 10% depending on model with analog output 7…30 Vdc (4…20 mA version) / 13…30 Vdc (0…10 V version) with SDI-12 output 7…30 Vdc Consumption basic version --- with heating 165 W with analog output 26 mA max.
  • Page 5 0.134 0.097 + 6.2 x 10 I 0.130 0.126 0.122 0.118 0.114 0.110 0.106 0.102 0.098 Rainfall rate (mm/h) Fig. 2.1 – Normalized resolution (0.1 mm @ 50 mm/h) as a function of the rainfall rate 0.259 0.1946 + 10.7 x 10 I 0.252 0.245 0.238...
  • Page 6 0.518 0.494 + 11.5 x 10 I 0.515 0.512 0.509 0.506 0.503 0.500 0.497 0.494 Rainfall rate (mm/h) Fig. 2.3 – Normalized resolution (0.5 mm @ 50 mm/h) as a function of the rainfall rate To correct the measurement depending on the rainfall rate, it is necessary to log, in addition to the number of pulses, also the instants at which the pulses occur.

  • Page 7: Installation

    3 INSTALLATION The rain gauge is supplied already calibrated and the calibration value (resolution) is shown on the instrument label. The instrument must be installed in an open area, away from buildings, trees, etc., ensuring the space over it is free from all objects which could obstruct rain measure- ments, and in an easily accessible position for the filter to be cleaned periodically.
  • Page 8 SW1 switch down, towards the EXTERNAL indication (see the figures 3.2 and 3.3): the analog or SDI-12 output is disabled. Connector of the cone heater Fig. 3.1 – Connections of contact output and heating Connection of analog output (only HD2013…A… and HD2013…V…): Perform the connections as shown in figure 3.2.
  • Page 9 The current analog output is active. The maximum value of the load resistance de- pends on the power supply value: max = 50 x (V – 7) Ω The minimum value of the load resistance for the version with voltage analog output is 10 KΩ.

  • Page 10: Configuration Of Analog Output

    Connection of the optional CPM12AA4.x cable to the rain gauges with analog or SDI-12 output option: Connector pin Function Wire color Power supply positive (+Vdc) Blue Analog or SDI-12 output positive (OUT) White Cable shield Black Connector reference Female connector outside view The cable shield (black wire) can be left disconnected inside the rain gauge (isolate or cut the wire terminal to avoid unwanted contacts).

  • Page 11: Tipping Bucket

    3.3 T IPPING BUCKET The tipping bucket is locked for the transport of the rain gauge. To unlock the bucket, remove the holders as shown in fig.3.5. For the For the transport operating mode Fig. 3.5 – Locking and unlocking the tipping bucket The oscillation of the tipping bucket can be adjusted through the two threaded rods located under the bucket, as illustrated in fig.

  • Page 12: Installation Modes

    3.4 I NSTALLATION MODES Æ 248 Æ 224 BIRD DISSUADER FASTENING KNOB OF THE CASING FASTENING AND LEVEL ADJUSTING SCREWS COLLAR TO FASTEN THE DATALOGGER TO DATA LOGGER THE SUPPORT STAFF HD2013-DB HD2003.77/40 HD2003.78 HD2003.75 FLOOR GROUND Fig. 3.7 – Mechanical dimensions, installation modes HD2013 V1.6...
  • Page 13 Fig. 3.8 – Ground installation HD2013 V1.6...
  • Page 14 Fig. 3.9 – Installation raised above ground HD2013 V1.6...

  • Page 15: Serial Commands

    4 SERIAL COMMANDS The rain gauges with analog or SDI-12 output option allow editing or checking the op- erating parameters of the instrument via serial commands. The editing of the rain gauge parameters requires sending a password via the serial command PWD.
  • Page 16 Date and time Command Description DSyyyy/mm/dd hh:mm:ss Sets the date yyyy/mm/dd (year/month/day) and the time hh:mm:ss (hour/minutes/seconds) in the rain gauge. Reply of the instrument: &| if date and time are accepted ? if date and time are not correct Reads the date (year/month/day) and the time (hour/minutes/seconds) set in the rain gauge.
  • Page 17 Resolution Command Description Sets the rain gauge resolution (amount of rainfall corresponding to an emptying of the tipping bucket) of index n: n=0  0.1 mm n=1  0.2 mm n=2  0.25 mm n=3  0.5 mm n=4  1.0 mm n=5 ...
  • Page 18 Analog output (only HD2013…A… and HD2013…V…) Command Description CPOE Enables the offset of the analog output initial value: 4…20 mA or 2…10 V. Reply of the instrument: &| CPOD Disables the offset of the analog output initial value: 0…20 mA or 0…10 V.
  • Page 19 Reset Command Description Resets the partial rainfall counter. Reply of the instrument: &| Resets all the rainfall counters. Reply of the instrument: &| Resets the electronic board (with consequent reset of all the measur- ing counters). Correction of the measurement To increase the measurement accuracy, a measurement correction table as a function of the rainfall rate is stored in the rain gauge at the factory.
  • Page 20 Command Description CTRi Reads the setting of the multiplication factor of index i. Reply of the instrument: r…rk…k, with: r…r = rainfall rate corresponding to the multiplication factor k…k = value of the multiplication factor Example: +50+1 indicates that the multiplication factor is 1 and the corresponding rainfall rate is 50 (mm/h or in/h).

  • Page 21: Sdi-12 Protocol

    5 SDI-12 PROTOCOL The HD2013…S… rain gauge is equipped with an SDI-12 communication interface compliant with the version 1.3 of the protocol, which allows the connection to SDI-12 sensor networks. The communication parameters of the protocol are: • Baud Rate = 1200 •...
  • Page 22 Command Instrument reply Description b<CR><LF> aAb! Modification of the instru- ment address. Where: Note: if the b character is not an acceptable ad- b = new dress, the instrument responds with a instead of b. address a<CR><LF> Request of the address of the instrument.
  • Page 23 Command Instrument reply Description Amount of rainfall in the current day atttn<CR><LF> Request of detection of the aM2! amount of rainfall in the cur- with: ttt = number of seconds necessary for the in- rent day. strument to make the measure available (3 characters) n = number of detected variables (1 character) Note: ttt = 000 means that data are immediately...
  • Page 24 Command Instrument reply Description Rainfall rate atttn<CR><LF> Request of detection of the aM4! current rainfall rate. with: ttt = number of seconds necessary for the in- strument to make the me asure available (3 characters) n = number of detected variables (1 character) Note: ttt = 000 means that data are immediately available.
  • Page 25 Command Instrument reply Description COMMANDS START CONCURRENT MEASUREMENT Total amount of rainfall atttn<CR><LF> Request of detection of the total amount of rainfall. with: ttt = number of seconds necessary for the in- strument to make the measure available (3 characters) n = number of detected variables (1 character) Note: ttt = 000 means that datum is immediately available.
  • Page 26 Command Instrument reply Description Amount of rainfall in the previous day atttn<CR><LF> Request of detection of the aC3! amount of rainfall in the with: ttt = number of seconds necessary for the in- previous day. strument to make the measure available (3 characters) n = number of detected variables (1 character) Note: ttt = 000 means that data are immediately...
  • Page 27 Command Instrument reply Description Partial amount of rainfall with automatic counter reset atttn<CR><LF> Request of detection of the aC6! partial amount of rainfall and with: ttt = number of seconds necessary for the in- subsequent reset of the cor- strument to make the measure available (3 responding counter.

  • Page 28: Maintenance

    Command Instrument reply Description a+n+r…r<CR><LF> Reads the partial amount aR6! of rainfall and resets the with: corresponding counter. n = number of emptying of the tipping bucket r…r = partial amount of rainfall in the unit of meas- urement set in the instrument (mm or inches) In addition to the above-mentioned commands, the rain gauge also implements the corresponding commands with CRC, that require to add a 3-character CRC code at the end of the reply before <CR><LF>.

  • Page 29: Instrument Storage

    INSTRUMENT STORAGE Instrument storage conditions: • Temperature: -30...+70 °C. • Humidity: less than 90 %RH no condensation. • In storage, avoid places where: humidity is high; • the instrument is exposed to direct sun radiation; • the instrument is exposed to a high temperature source; •...

  • Page 30: Ordering Codes

    ORDERING CODES HD2013 Mast / bird spikes kit: Blank = ground installation with feet, without bird spikes H0 = installation on Ø40 mm mast (not supplied), without bird spikes H1 = installation on Ø40 mm mast, with 1 m mast, without bird spikes H5 = installation on Ø40 mm mast, with 500 mm mast, without bird spikes K = ground installation with feet, with bird spikes K0 = installation on Ø40 mm mast (not supplied), with bird spikes...
  • Page 32 GHM GROUP – Delta OHM | Delta Ohm S.r.l. a socio unico Via Marconi 5 | 35030 Caselle di Selvazzano | Padova | ITALY Phone +39 049 8977150 | Fax +39 049 635596 www.deltaohm.com | sales@deltaohm.com WARRANTY Delta OHM is required to respond to the "factory warranty" only in those cases provided by Legislative Decree 6 September 2005 - n.

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