Response Electronics CL6011B Especificaciones Pagina 39

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4-9Input and Output Card
Original — December 1991 UM4.6:CS6003
Step 15: Turn the calibrator power OFF.
Step 16: Disconnect the umbilical cable and remove the isolated
analog input card.
4.1.3 Type DM6331 RTD Input Card —
Resistance-temperature Detector
The RTD input card is available in six temperature ranges. The
calibration steps are the same for all card versions.
4.1.3.1 Overview
Calibration of the RTD (resistance-temperature detector) card consists of
setting a minimum and maximum input level resistance and checking
linearity for each of four input channels. The ZERO potentiometer on
each channel controls the minimum level for that channel. The minimum
input resistance is set slightly above a true 0 percent level to allow for
underranging. The SPAN potentiometer on each channel controls the
maximum level for that channel. Figure 4-3 shows the location of the
ZERO and SPAN potentiometers for each channel on an RTD input card.
4
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