Delta OHM HD9906.51 Ventilation and Heating Unit User Manual
- June 12, 2024
- Delta OHM
Table of Contents
Delta OHM HD9906.51 Ventilation and Heating Unit
Product Information
- Product Name: Ventilation and Heating Unit HD9906.51
- Manufacturer: Delta OHM
- Website:www.deltaohm.com
Product Description
The HD9906.51 Ventilation and Heating Unit is a device that provides
ventilation and heating capabilities for sensors. It is available in two
versions: one for sensors with mV output and another for sensors with
amplified analog or digital output.
Warnings:
- The unit contains parts that could be at high temperatures (heater) and moving mechanical parts (fan). Before performing installation and maintenance operations, disconnect the power supply and wait for the heater to cool down.
- When connecting cables, respect the characteristics of the supplied cable and use low-resistance cables.
Technical Specifications:
- Ventilation Power Supply: Not specified
- Heating Power Supply: Not specified
- Operating Conditions: Not specified
- Cable Length: 5m standard (other lengths on request)
- Sensor for Version with mV Output: 213
- Sensor for Version with Amplified Analog or Digital Output: 147
- Filter: Not specified
- Fan: Not specified
- Fixed Foot: Not specified
- Adjustable Foot: Not specified
Product Usage Instructions
Installation:
Connections:
- The unit is supplied with the cable already connected. In case it is necessary to access the terminal block, unscrew the screws that secure the protective cover of the terminal block under the base of the unit.
- Pay attention to respect the polarity of the fan, otherwise, the air flow will be in the opposite direction to that expected (bottom up).
Fixing the Sensor:
- If ordered together with the unit, the sensor is already installed inside the unit.
- If the unit has been ordered separately, follow these steps to install the sensor:
- For sensors with mV output: Use M5x60 mm screws.
- For sensors with amplified analog or digital output: Use M5x85 mm screws.
- The sensor cable should be routed through the groove on the edge of the base. The sensor must be oriented so that the connector faces the cable exit groove.
Positioning the Unit:
- For accurate horizontal positioning, use the levelling device on the top of the base.
- The unit has two height-adjustable feet for levelling.
- The 9 mm through holes on the base can be used to fix the unit to a support plate. At the end of the installation, replace the external housing of the unit and fix it by screwing the three knobs.
Maintenance :
The filter covering the fan must be periodically checked. The maintenance
period depends on the degree of pollution of the environment in which the unit
is installed. The filter must be replaced if dirty or clogged. To access the
filter, gently pull the filter holder to slide it off the fan body.
Safety Instructions:
The unit has been manufactured and tested in accordance with the safety
standard EN61010-1:2010 Safety requirements for electrical equipment for
measurement, control, and laboratory use and has left the factory in perfect
safety technical conditions.
INTRODUCTION
The HD9906.51 ventilation and heating unit allows increasing the accuracy of solar radiation measurements maintaining the operating temperature of the sensor uniform. Ventilation reduces the type “A” offset (present in pyranometers and pyrgeometers) due to cooling of the dome with respect to the sensor body.
The unit can be used outdoor in any weather condition and avoids the formation of dew and frost on the optical part of the sensor.
The heating function of the unit can also be used in extreme environmental condi-tions, to avoid the formation of snow and ice on the sensor dome. Since the heating could increase the type “A” offset, it is recommended to use it only for the time nec-essary to remove snow or ice.
The built-in levelling device allows for accurate horizontal installation.
The unit is supplied as standard with a 5 m connection cable (other lengths on re-quest) already connected to the unit terminal block and can be used with:
- LPPYRA02… and LPPYRA10… pyranometers
- LPPIRG01… pyrgeometers
- LPPHOT02… photometers
- LPUVA02… and LPUVB02 radiometers
Available in version for sensors with mV output (lower) or for sensors with amplified analog or digital output (higher).
WARNINGS: THE UNIT CONTAINS PARTS THAT COULD BE AT HIGH TEMPERATURE (HEATER) AND MOVING MECHANICAL PARTS (FAN). BEFORE PERFORMING INSTALLATION AND MAINTENANCE OPERATIONS, DISCONNECT THE POWER SUPPLY AND WAIT FOR THE HEATER TO COOL DOWN.
- The unit is not intended for use with sensors other than those indicated.
- Respect the power supply values indicated in the technical specifications and pay attention to the indicated polarities.
- Do not use extension cables. In case of replacing the supplied cable with longer cables, respect the characteristics of the supplied cable and use low resistance cables.
SYMBOLS
WARNING: HOT SURFACE
TECHNICAL SPECIFICATIONS
| Ventilation power supply | 12 Vdc ± 10% / 5 W |
|---|---|
| Heating power supply | 12 Vdc ± 10% / 10 W |
| Operating conditions | -30…+70 °C / 0…100 %RH |
Max. altitude 3000 m
Cable length| 5 m standard (other lengths on request) Ending with free wires
INSTALLATION
Connections
The unit is supplied with the cable already connected. In case it is necessary
to access the terminal block, unscrew the screws that secure the protective
cover of the terminal block under the base of the unit.
Pay attention to respect the polarity of the fan, otherwise the air flow will be in the opposite direction to that expected (bottom up).
Fixing the sensor
If ordered together with the unit, the sensor is already installed inside the unit. If the unit has been ordered separately, to install the sensor:
- if present, remove the sensor shade disk, feet and levelling device;
- remove the external housing by unscrewing the three knobs;
- fix the sensor to the base of the unit using the two screws supplied.
- M5x60 mm for sensors with mV output (lower than the versions with amplifiedanalog or digital output).
- M5x85 mm for sensors with amplified analog or digital output.
The sensor cable should be routed through the groove on the edge of the base. The sensor must be oriented so that the connector faces the cable exit groove
Positioning the unit
For an accurate horizontal positioning, use the levelling device on the top of
the base. The unit has two height-adjustable feet for leveling.
The 9 mm through holes on the base can be used to fix the unit to a support plate. At the end of the installation, replace the external housing of the unit and fix it by screwing the three knobs.
MAINTENANCE
The filter covering the fan must be periodically checked. The maintenance
period depends on the degree of pollution of the environment in which the unit
is installed. The filter must be replaced if dirty or clogged. To access the
filter, gently pull the filter holder to slide it off the fan body.
SAFETY INSTRUCTIONS
General safety instructions
The unit has been manufactured and tested in accordance with the safety standard EN61010-1:2010 “Safety requirements for electrical equipment for measurement, control and laboratory use” and has left the factory in perfect safety technical conditions.
The unit’s proper operation and operating safety can be ensured only if all standard safety measures as well as the specific measures described in this manual are followed.
The unit’s proper operation and operating safety can be ensured only in the climatic conditions specified in this manual. Do not use the unit in places where there are:
- Corrosive or flammable gases.
- Direct vibrations or shocks to the instrument.
- High-intensity electromagnetic fields, static electricity.
User obligations
The unit 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.
EU DECLARATION OF CONFORMITY
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. 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.
During the warranty period (24 months from the date of invoice) any
manufacturing defects found will be repaired free of charge. Misuse, wear,
neglect, lack or inefficient maintenance as well as theft and damage during
transport are excluded. Warranty does not apply if changes, tampering or
unauthorized repairs are made on the product. Solutions, probes, electrodes
and microphones are not guaranteed as improper use, even for a few minutes,
may cause irreparable damages.
Delta OHM repairs the products that show defects of construction in accordance
with the terms and conditions of warranty included in the manual of the
product. For any dispute, the competent court is the Court of Padua. The
Italian law and the “Convention on Contracts for the International Sales of
Goods” apply.
TECHNICAL INFORMATION
The quality level of our instruments is the result of the continuous product development. This may lead to differences between the information reported in the manual and the instrument you have purchased. In case of discrepancies and/or inconsistencies, please write to sales@deltaohm.com. Delta OHM reserves the right to change technical specifications and dimensions to fit the product requirements without prior notice.
DISPOSAL INFORMATION
Electrical and electronic equipment marked with specific symbol in compliance with 2012/19/EU Directive must be disposed of separately from household waste. European users can hand them over to the dealer or to the manufacturer when purchasing a new electrical and electronic equipment, or to a WEEE collection point designated by local authorities. Illegal disposal is punished by law.
Disposing of electrical and electronic equipment separately from normal waste helps to preserve natural resources and allows materials to be recycled in an environmentally friendly way without risks to human health.
Members of GHM GROUP:
Documents / Resources
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Delta OHM HD9906.51 Ventilation and Heating
Unit
[pdf] User Manual
HD9906.51 Ventilation and Heating Unit, HD9906.51, Ventilation and Heating
Unit, Heating Unit
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Delta OHM HD9906.51 Ventilation and Heating
Unit
[pdf] Instruction Manual
HD9906.51 Ventilation and Heating Unit, HD9906.51, Ventilation and Heating
Unit, Heating Unit, Unit
References
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