Operator`s manual

Installation, Operation and Maintainance of Buoy Operated Automatic Meteorological Stations

CR10X Storage and Control Module

The CR10X contains an internal lithium coil cell battery that operates the internal clock and SRAM when the

datalogger is not connected to an external power source. This lithium battery should last for at least 4 years when no

external power is available. However, in the default situation the datalogger is connected to the BP24 power supply,

and the expected lifetime of the lithium battery is therefore around 10 years. Consequently, battery replacement will

not be needed in the mid term future.

The voltage of this internal Lithium battery can be measured using “star-B” mode, operation 8. The user is

referred to the Campbell Scientific CR10X Operator’s Manual for the exact instructions. If the voltage drops below 2.4

V the battery needs to be replaced. In this unlikely event, the user is advised to contact Campbell Scientific. Relevant

addresses are presented in Annex 10.

2.5 Signature

BUOY_METSTAT contains an instruction to calculate a program signature on a daily basis. This signature is a function

of the exact text of the BUOY_METSTAT program in the logger’s memory. The signature therefore changes if the

program is modified or corrupted. Thus, a daily calculation of the program signature represents a good test for

checking the state of the datalogger program.

The reader is referred to Annex 4, for detailed instructions on how to check the daily program signature. A change

in program signature requires that BUOY_METSTAT to be reloaded (for the appropriate instructions to this end see

paragraph 2.2).

2.6 Prompt Sheet

The project has prepared a Prompt Sheet, which is intended as memory aid when going into the field to visit the

Automatic Meteorological Stations. This sheet contains: (a) all relevant keyboard commands, (b) the wiring diagram,

mation while checking and operating the station.

The Prompt Sheet is included at the back of this manual. An additional laminated copy is provided, and can be left

on site in the instrument container/protective enclosure.

2.7 Trouble Shooting

Problem 1: Logger is not recording/general failure.

Cause: The majority of general operation failures are due to a corrupted data logger program.

Remedy 1.1: Place a secure version of BUOY_METSTAT1 in program location 7 and BUOY_METSTAT2 in program

location 8 of the Storage Module SM4M. De-activate security by following the instructions in Box 3. Connect the

SM4M to the data logger with the SC12 cable. Switch power Off/On and follow the instructions given in Box 2 to load

the intended secure versions of the datalogger program into the logger’s system memory, compiled, and made the

active program. Re-activate security by following the instruction given in paragraph 2.2. If the problems persist, all

indicators are pointing towards a hardware problem.

Remedy 1.2: check if all cables are properly connected; check if wiring is according to the wiring schedule

presented in Annex 2; check if power is connected (please note that the keyboard display CR10KD is powered by the

logger, hence, if it works properly the problem is not related to power).

Remedy 1.3: check the grounding. The reader is referred to paragraph 4.5 for detailed instructions on how to

ground the Met Station.

A series of test in the Project office has shown that inadequate grounding can have significant influence on the

measurement values.