Delta OHM HD2013 Manual Del Usuario página 5

Electric connection
For the version without heater use a two-wired lead, for the version with heater
use a four-wired lead. Slide the cable through the fairlead and fasten it with the
cable-holder located near the entry hole at the base of the rain gauge.
The correct configuration of the connections is illustrated in figure 1. The rain
gauge output, available on terminals 5 and 6, must be connected to the rain
gauge datalogger HD2013-D input (please see the details in the instrument's
description) or to a pulse counter or to a datalogger.
The heated version requires power for the resistors: the mode of connection
depends on the level of power used (12Vdc or 24Vdc) and must be made in the
manner reported in fig. 1.
The 24Vdc power must be connected between terminals 1 (+) and 4 (-), while for
12Vdc power use terminals 2 (+) and 4 (-) with a jumper between the terminals
1 and 3. If the connection are set correctly, a led placed near the terminals will
be lit up.
Maintenance
Verify filter cleanliness periodically; check that there is no debris, leaves or any-
thing else that might obstruct the passage of water.
Check that the tipping bucket contains no dirt, sand, ... deposits, or any other
obstruction.
If necessary, the surface can be cleaned with mild non aggressive detergent.
Technical characteristics
HD2013R
12Vdc or 24Vdc ±10% /
Power
Type of output contact NC contact (opens during commutation)
Resolution
(on request at the time of placing the order)
Precision
Operating temperature
-20°C ... +60°C
range
Heater intervention
temperature
Protection degree
Collector area
HD2013-D
RAIN GAUGE DATALOGGER
Introduction
HD2013-D is a datalogger that has been specifically developed to capture and
memorize weather and atmospheric precipitation trends. Together with the capa-
cious memory, its long life Lithium battery guarantees remarkable recording
capacity without it being necessary for the user to intervene. The large display not
only provides the total and partial precipitations in real time, in both millimetres
and inches, but also the environment temperature. It is supplied with DeltaLog6
dedicated software, using which all the instrument's parameters can be set. It is
connected to the PC through an RS232C serial port using the cable supplied.
HD2013-D can be connected to the most popular types of rain gauges using NC
or NO output contact.
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Fig. 3 Base for ground fastening HD2013.78
HD2013
---
35W
0.1 - 0.2 or 0.5 mm/commutation
± 2% between 20÷300 mm/h
+4°C ... +60°C
+4°C ---
IP67
400 cm
2
Support plate for rain gauge raised from ground
For software installation and running, please refer to the documentation on the
instrument's accompanying CD-ROM.
Important note: in order to make the instrument completely waterproof, buttons
have not been used but reed relays were chosen instead. These can be operated
with a magnet. The magnet is fixed to the end of a small aluminium handle, and
this is connected to the case. After use the magnet, must be put away and stored
in its housing.
On the instrument front there are two areas indicated in red corresponding to
"Clear/Up" and "Select/Set": the magnet should be placed on these areas to
perform the instrument programming operations. Placing the magnet for some
time on the red zone and then subsequently withdrawing it is the equivalent of
activating a button. For the sake of simplicity, in the instrument description which
follows, this operation will be called: "activation of the Clear/Up button", "acti-
vation of the Select/Set button".
Installation and connections
The HD2013-D case has an IP67 degree of protection. The two function keys
that allow the instrument to be controlled are formed of reed contacts operated
externally by using a magnet supplied with the instrument.
In the lower part of the case there are two connectors for the rain gauge (three-
pole male connector in the centre of the case) and the PC's RS232C serial port
(five-pole male connector on the right). At the bottom of the case there are two
holes so that the instrument can be fastened to a wall. As raised rain gauge it can
be fasten to the support staff through the base HD2003.77.
Operation
The datalogger counts and memorizes the emptying of the rain gauge's small
bucket through a magnet activating a reed relay on each emptying: each com-
mutation corresponds to a quantity of rain equal to the rain gauge resolution.
The following resolutions can be set using the DeltaLog6 software: 0.1, 0.2, 0.25
and 0.5 mm of rain. Furthermore, by using the software the type of reed contact
closing can be selected. This depends on the type of rain gauge: it can either be
normally closed (NC) or normally open (NO) In both cases an alarm display is set
in case the small bucket, after its rotation, does not go back to the expected rest
position according to the type of contact selected.
Keyboard description
In normal operating conditions the HD2013-D display shows the hour and min-
utes on the top line, the precipitation quantity since last reset (partial precipita-
tions), and the temperature detected by the sensor located inside the case.
By operating directly on the instrument buttons it is possible to:
• Display the total precipitation quantity since the last reset or since the last bat-
tery change
• Modify date and time
• Reset the partial rain quantity.
The functions performed by the two buttons are described:
Clear/UP BUTTON
The menu can be accessed by starting from the normal functioning mode and
activating the button for more than 3 seconds: the words "ZERO CNT OR
MENU" are then displayed.
At this point further action on the same button resets the partial counter (CLEAR
Tip for ground for rain gauge raised from ground
4