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Summary of Contents for Delta OHM HD2013.3
- Page 1 English Operating manual Precipitation detector HD2013.3 www.deltaohm.com Keep for future reference.
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Page 2: Table Of Contents
INTRODUCTION ..................3 TECHNICAL SPECIFICATIONS ..............4 INSTALLATION ..................6 3.1 E ................6 LECTRICAL CONNECTIONS CONFIGURATION AND MEASUREMENT ............. 9 PROPRIETARY PROTOCOL ..............10 MODBUS-RTU PROTOCOL ................ 17 MAINTENANCE ..................21 SAFETY INSTRUCTIONS ................21 ORDERING CODES .................. 22 HD2013.3 V1.7... -
Page 3: Introduction
INTRODUCTION HD2013.3 is a precipitation detector based on the capacitive principle. The capacity value of the sensitive element changes according to the surface dampened by raindrops. An integrated heater keeps the detector dry, evaporates water and prevents false sig- nals caused by fog or dew. The heater also activates at low temperatures, melting the snow and allowing detecting snow precipitations by using an ambient temperature sensor. -
Page 4: Technical Specifications
8-pole circular connector Operating conditions -40…+60 °C / 0…100 %RH Storage temperature -40…+60 °C Dimensions ∅ 70 x 70 mm (only the instrument without mounting bracket) Weight 450 g approx. Protection degree IP 68 Housing material Technopolymer ASA HD2013.3 V1.7... - Page 5 Bird spikes (optional) Bracket Fig. 2.1: dimensions (mm) HD2013.3 V1.7...
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Page 6: Installation
Use the supplied accessories to mount the instrument. The bracket can be fixed to a ∅ 30…50 mm mast, both vertical and horizontal, thanks to the double drilling on the bracket. Mast HD2013.3 Bracket Connector Screws for fixing the detector to the bracket... - Page 7 With the commands of the proprietary protocol it is possible to set the range 0…20 mA for the output and reverse the direction of the output, so that when the sensor sensi- tive surface is completely wet the output is 20 mA. In case of measurement error, the output goes to 22 mA. HD2013.3 V1.7...
- Page 8 Fig. 3.5: voltage analog output connection Contact output: There is a normally open voltage-free contact between pins 1 and 4 of the connector (green and blue wires of the optional CP2013.2… cable). The contact closes when the sensor detects a precipitation in progress. HD2013.3 V1.7...
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Page 9: Configuration And Measurement
By default, the automatic calibration is enabled, with 30 minutes interval and 0.1% maximum correction. In order to change the automatic calibration settings, see the chapters on the proprietary protocol and MODBUS-RTU protocol. HD2013.3 V1.7... -
Page 10: Proprietary Protocol
& n| Reads the instrument address for the MODBUS-RTU pro- tocol. Note: after sending the CP1 command, the instrument remains with the proprietary protocol. Send the command SM to activate the MODBUS-RTU protocol immediately, or power cycle the HD2013.3 V1.7... - Page 11 If the 0.1% resolution is set, the value must be ex- pressed in tenths (for example, write 970 to indicate 97.0%). Default : 97 (=97% with 1% default resolution) & n| Reads the setting of the precipitation detection thresh- old. HD2013.3 V1.7...
- Page 12 (0…32767 s). Default: 0 RTAD & n| Reads the setting of the delay in indicating the transition from rainfall to snowfall, when the temperature dops be- low the reference temperature. HD2013.3 V1.7...
- Page 13 & n| Reads the setting of the correspondence between analog output and percentage of dry sensitive surface: 4…20 mA / 0…10 V 0…100% if n=0 (default) 4…20 mA / 0…10 V 100…0% if n=1 HD2013.3 V1.7...
- Page 14 HEATER_MODE = heating operating mode HEATER_PERCENTAGE = percentage of heating power used &| Sets the interval for sending the measurement in- formation to n seconds (1…30 s). Default: 1 & n| Reads the setting of the interval for sending the measurement information. HD2013.3 V1.7...
- Page 15 %. The value should range within 1 (=0.1%) and 200 (=20.0%). Default: 4 (=0.4%) RRBMC & n| Reads the maximum correction that can be applied by each precipitation sensor automatic calibration. HD2013.3 V1.7...
- Page 16 Default: 250 (=25.0 °C) RHDT & n| Reads the setting of the temperature difference (ΔT) that is maintained between the sensor heated base and the environment. & x y| Reads the number of reboots (x) and watchdog timeouts (y) that occurred. HD2013.3 V1.7...
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Page 17: Modbus-Rtu Protocol
Number of MODBUS communication error. 16-bit Integer Ambient temperature (x10). 16-bit Integer Heater temperature (x10). 16-bit Integer Percentage of heating power used. 16-bit Integer Indication of precipitation absent/in progress and type of precipi- 16-bit Integer tation: 0=no precipitation 1=rainfall 2=snowfall HD2013.3 V1.7... - Page 18 0.1%) of dry sensitive surface of the sensor below which the instrument indicates that a precipitation is in progress (default=97%). Hysteresis (x10 if the resolution is 0.1%) of the precipitation de- 16-bit Integer tection threshold (0…20%, default=1%). HD2013.3 V1.7...
- Page 19 The ΔT setting is therefore a compromise between opposite needs. If the difference ΔT is too low, condensation can form on the sensor surface, which can be detected as precipitation. HD2013.3 V1.7...
- Page 20 Address Description Format Sensitivity of the precipitation detection (10…1000, default 100). 16-bit Integer The greater the value, the greater the sensitivity. HD2013.3 V1.7...
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Page 21: Maintenance
• User obligations The instrument operator shall follow the directives and regulations below that refer to the treatment of dangerous materials: • EEC directives on workplace safety. National law regulations on workplace safety. • Accident prevention regulations. • HD2013.3 V1.7... -
Page 22: Ordering Codes
Cable with 8-pole watertight connector on one end, free wires on the other end. Length 10 m. DELTA OHM metrology laboratories LAT N° 124 are ISO/IEC 17025 accredited by ACCREDIA for Temperature, Humidity, Pressure, Photometry / Radiometry, Acous- tics and Air Velocity. They can supply calibration certificates for the accredited quantities. - Page 24 | 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. 206. Each instrument is sold after rigorous inspections; if any manufacturing defect is found, it is necessary to contact the distributor where the instrument was purchased from.
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