GHM Delta OHM LPPYRA11, Руководство по эксплуатации

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LPPYRA11
- 8 -
V1.1
4 ELECTRICAL CONNECTIONS
LPPYRA11 has a 8-pole connector and use the CPM12AA8... optional cables in UV
resistant PTFE, with 8-pole connector on one side and open wires on the other side.
The metallic housing of the albedometer 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
albedometer, connect the wire of the cable corresponding to the
housing to ground ( ).
The albedometer LPPYRA11 is passive and does not require power supply. It is to be
connected either to a millivoltmeter or to a data acquisition system (with at least two
inputs). Typically, the albedometer output signal does not exceed 20 mV. In order to
better exploit the albedometer features, the readout instrument should have 1 µ V res-
olution.
Connector Function Color
1 Output positive (+Vout) upper pyranometer [ ↓ ] Red
2 Output negative (-Vout) upper pyranometer [
↓
] Blue
3 Not connected
4 Not connected
5 Output negative (-Vout) lower pyranometer [
↑
] Brown
6 Housing White
7 Cable shield Black
8 Output positive (+Vout) lower pyranometer [
↑
] Green
Fig. 4.1: LPPYRA11 connections
The cable shield is isolated from the albedometer housing by means of two gas surge
arrestors, which prevents lightnings to damage the sensor. The shield has to be con-
nected to the same ground as the readout instrument. Best safety is achieved through
a perfect connection between housing and earth.
Connect to ground only if it is not possible to
ground locally the case of the pyranometer
CPM12AA8… cable
Sensor
male connector
Red [D]
Reflected
radiation
[
↑
]
Incident
radiation
[
↓
]
Multi-
input
data
logger
Converter
amplifier
with V or mA
output
Converter
amplifier
with V or mA
output
or
or
Green [A]
Brown [F]
Blue [C]
Black [E]
White [B]