Campbell 21X Especificaciones descargar pdf (Pagina 42)

Number 4250-2010

Revision 0.1

Date MAY 1996

Page 23 of 37

Enter M to select DCP channel 01. The display message will be "P

CHANNEL 01."

Enter N to edit the sensor configuration. The display message will

be "P01 SENSOR TYPE 10."

Enter V to scroll through the sensor configuration until you reach

the "start of measurement prompt", "P01 START OF MEAS

23:30:00."

The start of measurement time should be programmed for 30

minutes after the current hour (e.g., if the current time is 17:04:29,

enter 17:30:00). A second prompt asking "CHANGE ALL

CHANNELS? (1=Y, 2=N) will be displayed.

Enter 1, setting the start of measurement time for all channels to

17:30:00. The display message will be "P01 START OF MEAS

17:30:00."

This completes programming of the Handar 540A/570A DCP.

4.4 PRE-FIELD PERFORMANCE TESTING

Pre-field performance testing of the Handar 540A/570A DCP includes laboratory

performance testing and a 7-day field test at the Fort Collins Transmissometer Calibration and

Test Facility. Laboratory performance testing verifies proper programming and calibration of the

DCP. Field testing exposes the DCP to a varying operational environment, testing the ability of

the DCP to maintain accurate timing and calibration over a wide range of operating conditions.

Document all performance checks and results on the Laboratory Performance Testing Form -

Handar 540A/570A DCP (see Figure 4-10).

4.4.1 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).

4.4.2 Laboratory Performance Testing

Laboratory performance testing repeats the DCP performance and timing checks and the

transmission test performed during the post-field inspection and performance checks. It also

adds a run mode timing check. Procedures for conducting laboratory performance testing are:

• Perform DCP timing checks as described in Section 4.1.4.

• Perform DCP A/D converter checks as described in Section 4.1.5.

• Perform the DCP transmission test as described in Section 4.1.6.

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Campbell 21X Especificaciones Pagina 42