Campbell 21X Especificaciones descargar pdf (Pagina 22)

Number 4250-2010

Revision 0.1

Date MAY 1996

Page 3 of 37

• Electronic contacts cleaning fluid

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

4.0 METHODS

Handar 540A/570A DCPs should be serviced according to the following schedule:

• Prior to installation at a field monitoring site

• On an annual schedule

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

Factory servicing and calibration of the Handar 540A/570A DCP is required when timing

and performance checks indicate that the DCP is not operating within factory specifications.

This section includes five (5) major subsections:

4.1 Post-Field Inspection and Performance Checks

4.2 Routine Laboratory Servicing

4.3 DCP Programming

4.4 Pre-Field Performance Testing

4.5 Archiving Handar 540A/570A DCP Service Records

4.1 POST-FIELD INSPECTION AND PERFORMANCE CHECKS

When a DCP is returned from a field site, the external and internal physical condition is

visually inspected prior to performing any performance tests or laboratory servicing. If the DCP

is received with the power switch in the "ON" position and there are no loose circuit boards,

disconnected or damaged connectors, or other apparent problems that might affect the operation

of the DCP, performance tests that evaluate DCP timing, A/D converter operation, transmission

power, and the DCP program are performed. Results and comments related to inspection and

performance testing are fully documented on the Post-Field Inspection Checklist - Handar

540A/570A DCP (Figure 4-1).

4.1.1 General Information

RECORD Record the DCP serial number, the site it was received from, and

GENERAL the date it was received. The initials of the technician performing

INFORMATION the inspection should also be recorded.

IDENTIFY Identify the DCP model (Figure 4-2 shows the front panel layout

DCP MODEL of each of the three DCP models used by ARS).

NOTE REASON Note whether the DCP was returned for annual servicing (no

FOR RETURN observed operational problems in the field) or for unscheduled

maintenance (unit malfunctioning). If returned for unscheduled

maintenance, describe the observed field symptoms.

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