User manual
Table Of Contents
- 1 FOREWORD
- 2 INTRODUCTION
- 3 PRINCIPLE OF OPERATION
- OPTIONS AND SPECIFICATION
- INSTALLATION REQUIREMENTS
- INSTALLATION
- 7 MECHANICAL
- 8 OUTPUT FORMATS
- 9 ANALOGUE OUTPUTS AND OPTIONS
- 10 METPAK SDI-12
- 11 MAINTENANCE & FAULT-FINDING
- 12 TESTS
- 13 APPENDICES
- CS215_jun06.pdf
MetPak Doc No 1575-PS-0001 Issue 02 CN 4240 March 2006
6.3 Electrical
Cable
Cable type
Generic description – Twisted pairs with drain wire, screened with aluminised tape,
with an overall PVC sheath. Wire size 7/0.2mm (24 AWG)
The table shows some suitable manufacturers’ references; other manufacturers’ equivalents can be used.
Application No. of pairs Gill ref. Belden ref.
Batt
electronics ref.
Analogue 4 026-03156 9728 91199
SDI-12 2 - 9729 -
Cable length
The maximum cable length is dependent on the chosen communication.
The table shows the typical maximum lengths at the given baud rates, using the recommended cable. If any problems of
data corruption etc are experienced, then a slower baud rate should be used. Alternatively, a thicker or higher
specification cable can be tried.
WindSonic Option Communication format Baud rate Max. cable length
Analogue – Voltage o/p N/A 6.5 m (20 ft) Option 3 and 4
Option 1 and 2
SDI-12
1200
90m (300ft)
Power supply
The MetPak requires a DC supply of between 9 –16vdc @ 22ma typical if fitted with a Campbell CS215
temperature and relative humidity probe or 10-28vdc @ 28ma typical if fitted with a Rotronic HygroClip S3
probe.
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