Campbell 21X Dokumentacja Pobierz pdf (Strona 31)

Number 4250-2010

Revision 0.1

Date MAY 1996

Page 12 of 37

SWITCH Switch the DCP from "RUN" mode to "PROGRAM" mode by

MODES entering ?.

The computer display will read "R Enter (1) = Service (2) = All."

Enter 2 to select "ALL."

SET OUTPUT Set the output of the calibrated voltage source to 0.000 volts.

OBTAIN Obtain DCP readings for data channels 01, 02, and 03 using the

READINGS following procedure:

• Enter M (access data channel 01 - transmissometer raw readings).

• Enter $ (execute a forced scan).

• Record the DCP reading for data channel 01.

• Enter V (scroll down to data channel 02 - transmissometer toggle

signal).

• Enter $ (execute a forced scan).

• Record the DCP reading for data channel 02.

• Enter V (scroll down to data channel 03 - transmissometer

standard deviation).

• Enter $ (execute a forced scan).

• Record the DCP reading for data channel 03.

With a 0.000 volt input, DCP data channels 01, 02, and 03 should

all read "000."

SET OUTPUT Set the output of the calibrated voltage source to 4.950 volts.

VOLTAGE

OBTAIN Obtain DCP readings for data channels 01-05 and 10 using the DCP

READINGS procedures described above for obtaining DCP readings for data

channels 01, 02, and 03.

OBTAIN Obtain current laboratory measurements of ambient temperature and

AT/RH relative humidity using the Rotronic GT-L hand held AT/RH sensor.

Record these values on the inspection checklist (DCP A/D

Converter Checks section) under channel 04 and channel 05,

respectively.

NOTE With a 4.950 volt input, DCP data channels 01 and 03 should read

READINGS "495." DCP data channel 02 should read "001."

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Campbell 21X Dokumentacja Strona 31