Campbell-scientific SDM-INT8 8-Channel Interval Timer Manual de usuario descargar pdf (Pagina 30)

SDM-INT8 8 Channel Interval Timer

*Table 1 Programs

01: 1 Sec. Execution interval

1: SDM-INT8 (P101) measure wind speed

1: 00 Address Option

2: 0022 Chan8765=HLrise/HLrise/LLrise/LLrise/

3: 2222 Chan4321=LLrise/LLrise/LLrise/LLrise

4: 0022 Chan8765=none/none/kHz/kHz/

5: 2222 Chan4321=kHz/kHz/kHz/kHz/

6: 0 Execution interval averaging (1 second)

7: 1 Loc [:m/s ]

8: 98.0 Mult m/s (convert from kHz to m/s)

9: 0 Offset

2: Excite,Delay,Volt(SE) (P4) measure wind direction

1: 6 Reps

2: 15 2500 mV fast Range

3: 1 IN Chan

4: 1 Excite all reps w/EXchan 1

5: 0 Delay (units .01sec)

6: 2500 mV Excitation

7: 7 Loc [:degrees ]

8: .1420 Mult degrees

9: 0 Offset

7.2.3 Brake Pressure and Wheel Speed Test - Capture All Events and P23

Burst Mode

A CR10X controls an INT8 to capture about 2 seconds worth of wheel speeds

while measuring corresponding brake pressures in Burst Mode. The CR10X's

Burst Mode (P23) triggers the INT8 with Control Port 1 (C1) when the first

analog channel measures pressure over the trigger level.

Flag 1 is manually set by the operator to control when the program is entered.

After each test, the program sets Flag 1 low to return control to the operator.

The first time through the table, the INT8 is programmed and starts measuring,

looking for the edge on channel 1 that the Burst Mode Instruction (P23) will

trigger using C1.

The real time of the brake event (immediately after it occurred) is stored in

array ID 9 with P77, followed by the analog burst data in arrays 1,2,3,4 and the

timing data from the INT8 (picked up each time on the subsequent time

through the table) in arrays 5,6,7,8.

The Burst Mode measures for 2 seconds (200 scans at 10 ms/scan). The INT8

measures for about the same 2 seconds, as defined by the trigger edge on

channel 1 caused by the start of Burst Mode and the ending edge caused by

pulsing Port 1 after the Burst Mode. Data from the INT8 is stored in Final

Storage the next time the table is executed, and the INT8 is reinitialized for the

next brake event.

1 2 ... 25 26 27 28 29 30 31 32 33 34 35 ... 41 42

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Campbell-scientific SDM-INT8 8-Channel Interval Timer Manual de usuario Pagina 30

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