Campbell 21X Specifikace stáhnout pdf (Strana 12)

Number 4250-2000

Revision 1.0

Date MAY 1996

Page 3 of 7

• Replacement components as required

• Medium screwdrivers (flat-blade and Phillips-head)

• Battery charger

• Replacement sealed lead acid battery pack

• Two (2) dry half-unit DESI PAK desiccant packets

4.0 METHODS

Campbell 21X dataloggers should be serviced according to the following schedule:

• Prior to installation at a field monitoring site

• On an annual schedule (for units not used at field sites)

• Any time the operation or accuracy of the datalogger appears to be suspect

Calibration of the Campbell 21X datalogger is required any time calibration checks indicate

that the datalogger is not operating within factory specifications.

This section includes six (6) subsections:

4.1 Internal Memory Check

4.2 Analog Input Checks

4.3 Analog Output Checks

4.4 Pulse Counter Check

4.5 Panel Temperature Test

4.6 Internal Battery Servicing

4.7 Archiving Datalogger Service Records

Procedures for performing the internal memory check are documented on the Campbell

21X Datalogger Servicing Documentation Form (Figure 4-1) and are described in the following

sections.

RECORD Record the datalogger serial number and the current date. The

GENERAL initials of the technician performing the inspection should also be

INFORMATION recorded.

4.1 INTERNAL MEMORY CHECK

The Campbell 21X datalogger will perform an internal memory check on power-up. This

check indicates the status of each memory chip on the datalogger's CPU board. Procedures for

performing the internal memory check are documented on the Campbell 21X Datalogger

Servicing Documentation Form (Figure 4-1) and are as follows:

TURN Turn the datalogger

. The datalogger display will read

DATALOGGER "HELLO."

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Campbell 21X Specifikace Strana 12