H-38-11 Bourns Inc., H-38-11 Datasheet - Page 33

• Manufacturer Part Number: H-38-11
• Description: HDWR NUT MOUNTING FOR ECW ENCODR
• Manufacturer: Bourns Inc.
• Type: Mounting Nutr
• Series: Hr

Specifications of H-38-11

• Mounting Hole Size: 9 mm
• Features: Hardware indicated by shaded area is normally supplied with unit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: ECW1DB24BC0024 - ENCODER DIGITAL CONT 24 CPRECW1JB24BC0024 - ENCODER DIGITAL CONT 24 CPR
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

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Application Notes
RCL Bridge Null Control
In this application, the precision potentiometer is
used as a dissipation factor dial in a capacitance
bridge, and is used in conjunction with a calibrated
dial. This application requires the use of a closely
controlled output function characteristic found in
the precision potentiometer. See Figure 11.
Figure 11: RCL Bridge Null Control Circuit
Sweep Delay Control
When used as a sweep delay control in an
oscilloscope or other types of test instrumentation,
the 10-turn precision potentiometer requires precise
linearity so that the turns-counting dial reading can
be accurately converted to a time interval. See Figure
12.
Figure 12: Sweep Delay Control Circuit
Some typical applications for panel control
potentiometers are listed below along with circuit
configurations and application details.
Audio Frequency Balance Control
A stereo balance control usually requires a pair of
non-linear panel control elements with opposite
tapers (log and reverse log), or special elements in
which no resistance change takes place over half
rotation. The panel control is normally a dual cup
unit controlled by a single shaft. See Figure 13.
Figure 13: AF Balance Control Circuit
Triac Control
In this application, the panel control is used as a
triac load control (i.e., light dimmer) using a
rheostat configuration. The principal concern in this
application is wiper current or power dissipation and
voltage rating. See Figure 14.
Figure 14: Triac Control Circuit