LPPYRHE16
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V2.3
4
ELECTRICAL CONNECTIONS
LPPYRHE16, LPPYRHE16AC and LPPYRHE16AV have a 4-pole connector and use
the CPM12AA4... optional cables.
LPPYRHE16S and LPPYRHE16ACS have a 8-pole connector. LPPYRHE16S uses the
CPM12-8D... optional cables, while LPPYRHE16ACS uses the CPM12-8DA... op-
tional cables.
The metallic housing of the pyrheliometer 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
pyrheliometer, connect the wire of the cable corresponding to
the housing to ground ( ).
In the powered versions, internally there are surge protection devices connected to the
housing. Grounding the housing allows the correct protection functionality, in particular
against lightning.
4.1
LPPYRHE16
CONNECTIONS
The pyrheliometer LPPYRHE16 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
pyranometer output signal does not exceed 20 mV. In order to better exploit the pyr-
heliometer 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
Fig. 4.1: LPPYRHE16 connections
CPM12AA4… cable
Sensor 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 pyrheliometer
