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SDM-INT8 8-Channel Interval Timer
利用できるサービス
修理 非対応
キャリブレーション 非対応
フリーサポート 非対応

概要

The SDM-INT8 outputs timing data to a Campbell Scientific data logger. The data logger can process the timing data to calculate RPM, duty cycle, velocity, crank angle, etc.

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利点と特徴

  • Allows individual programming for each of the eight channels
  • Includes an internal microprocessor that allows measurement independent of data logger's execution interval
  • Outputs period, pulse width, frequency, counts, or time intervals
  • Records results as execution interval averages, continuous averages, specified interval averages, or capture all events

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詳細

The SDM-INT8 has eight channels that are individually programmed to record the timing of input voltage transitions (events). It uses this information to output:

  • Period (ms)
  • Frequency (kHz)
  • Elapsed time between events on adjacent channels
  • Number of counts measured on channel 2 between a “start” event on channel 1 and a “stop” event on any other channel
  • Elapsed time between events on channel 1 and any other channel
  • Pulse Counting (any channel can function as a pulse counter)

High Level Voltage Input Pulses Schematic

Low Level AC Voltage Input Schematic

SDM Operation

The data logger enables individual modules through an addressing scheme; up to 15 SDM-INT8s can be connected to one data logger. After a module is enabled, it operates independently of the data logger until additional commands are received or results are transmitted.

仕様

Operating Voltage 9.6 to 16 Vdc
Current Drain
  • 13 to 20 mA (active)
  • 400 µA (quiescent)
Maximum Timing Measurement 16.7 s
Resolution ±1 µs
Operating Temperature -25° to +50°C
Dimensions 0.3 x 12.7 x 2.5 cm (8 x 5 x 1 in.)
Weight 0.82 kg (1.8 lb)

High-Level Voltage Input Pulses

Minimum Pulse Width 2 µs
Maximum Frequency (32-bit values)
  • The maximum frequency specification for high-resolution (32-bit) values assumes all eight channels are used.
  • 5.1 kHz (averaging options)
  • 10 kHz (capturing all events)
Maximum Frequency (16-bit values)
  • The maximum frequency specifications for low-resolution (16-bit) values is for the execution interval averaging only.
  • If number of channels programmed is
    • 1 channel—42.5 kHz
    • 2 channels—17.5 kHz
    • 3 channels—11 kHz
    • 4 channels—8.6 kHz
    • 5 channels—5.2 kHz
    • 6 channels—4.8 kHz
    • 7 channels—4.5 kHz
    • 8 channels—4.28 kHz

Low-Level AC Voltage Input

AC Voltage
  • 20 mV RMS (min.) ac voltage
  • 20000 mV RMS (max.) ac voltage
Input Hysteresis 11 mV
Minimum Frequency 1 Hz
Maximum Frequency
  • 100 kHz (20 mV min. RMS)
  • 400 kHz (50 mV min. RMS)
  • 1000 kHz (150 mV min. RMS)
  • 4000 kHz (2.5 to 20 V min. RMS)

互換性

注意: 以下は代表的な互換性情報を示しています。互換性のある製品や互換性のない製品をすべて網羅したリストではありません。

Data Loggers

製品 互換性 注意
21X (リタイア)
CR10 (リタイア)
CR1000 (リタイア)
CR10X (リタイア)
CR200X (リタイア)
CR206X (リタイア)
CR211X (リタイア)
CR216X (リタイア)
CR23X (リタイア)
CR295X (リタイア)
CR3000 (リタイア) SDMs are connected to the ports labeled SDM-C1, SDM-C2, and SDM-C3.
CR500 (リタイア)
CR5000 (リタイア) SDMs are connected to the ports labeled SDM-C1, SDM-C2, and SDM-C3.
CR510 (リタイア)
CR6
CR800 (リタイア)
CR850 (リタイア)
CR9000 (リタイア) SDMs connect to ports provided on the CR9080 PAM module.
CR9000X (リタイア) SDMs connect to ports provided on the CR9032 CPU module.

Mounting Equipment

製品 互換性 注意
ENC10/12
ENC10/12R
ENC12/14
ENC14/16
ENC16/18
ENC24/30
ENC24/30S

Distributed Data Acquisition

製品 互換性 注意
Granite 10
Granite 6
Granite 9

互換性に関する追加情報

Data Logger Considerations

Programming

The SDMINT8 instruction controls the SDM-INT8 operation in CRBasic. Instruction 101 controls the SDM-INT8 operation in Edlog.

Power Considerations

The SDM-INT8 draws 20 mA. In most applications, the data logger’s sealed rechargeable power supply can be used. The data logger’s alkaline power supply has sufficient capacity to operate the SDM-INT8 during short-term installations only.

Enclosure Considerations

The SDM-INT8 should be housed in an environmental enclosure. A bracket is shipped with the SDM-INT8 for mounting it to an enclosure backplate.

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