Sensoray 518 Uživatelský manuál Strana 43

  • Stažení
  • Přidat do mých příruček
  • Tisk
  • Strana
    / 57
  • Tabulka s obsahem
  • KNIHY
  • Hodnocené. / 5. Na základě hodnocení zákazníků
Zobrazit stránku 42
42
Thermistor/Custom Resistive Sensors
In the following discussion, thermistor is used interchangeably with custom resistive sensor.
Thermistors have much higher resistance than RTD’s over most of their operating range. As a
result, the RTD two-wire configuration is recommended if your sensor will be operating only at
higher resistance values. If your thermistor will be operating at lower resistance values, you
should consider implementing a three- or four-wire hookup to prevent cable-losses.
Thermistors should be connected using shielded cable. The shield should be connected only to
the 7409TC S terminal.
Strain and Pressure Gages
In a typical strain/pressure gage, four wires connect the gage to the measurement system. Two
wires supply gage excitation, while the other two wires carry the gage output signal. If you are
using a six-wire gage, you must connect the gage’s excitation source and sense leads together at
the 7409TC I+ and I- terminals.
Strain and pressure gages should use shielded cable. The shield should be connected only to the
channel S terminal on the 7409TC.
Zobrazit stránku 42
1 2 ... 38 39 40 41 42 43 44 45 46 47 48 ... 56 57

Komentáře k této Příručce

Žádné komentáře