GHM Delta OHM LPPYRA03, Руководство по эксплуатации

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LPPYRA03
- 8 -
V2.8
4 ELECTRICAL CONNECTIONS
LPPYRA03
,
LPPYRA03AC
and
LPPYRA03AV
have a 4-pole connector and use the
CPM12AA4... optional
cables, with 4-pole connector on one side and open wires on
the other side.
LPPYRA03S
and
LPPYRA03S12
have a 8-pole connector and use the
CPM12-8D...
optional
cables, with 8-pole connector on one side and open wires on the other side.
The metallic housing of the pyranometer should preferably be
grounded ( ) locally. In this case, do not connect the wire of the
cable corresponding to the housing to prevent ground loops.
Only if it is not possible to ground locally the metallic case of the
pyranometer, connect the wire of the cable corresponding to the
housing to ground ( ).
Note: in LPPYRA03AV the housing is not con-
nected to the connector.
Inside the housing there is a surge protector connected between the
housing itself and the electronic circuit (powered models) or the ca-
ble shield (passive model). Grounding the housing allows the correct
protection function (in particular against lightning) of the surge pro-
tector.
4.1 LPPYRA03
CONNECTIONS
The pyranometer LPPYRA03 is passive and does not require power supply. It is to be
connected either to a millivoltmeter or to a data acquisition system. Typically, the py-
ranometer output signal does not exceed 20 mV. In order to better exploit the pyra-
nometer features, the readout instrument should have 1
µ
V resolution.
Connector Function Color
1 +Vout Red
2 -Vout Blue
3 Housing (C) White
4 Cable shield (SH) Black
1 2
3 4
+Vout
-Vout
SH
C
Fig. 4.1: LPPYRA03 connections
CPM12AA4… cable
Pyranometer M12
male connector
Datalogger or
converter/amplifier
with V or mA output
Connect to ground only if it is not possible to
ground locally the housing of the pyranometer
To circuit
Housing
Surge
protector