Kobold KPH300 Operating Manual

KOBOLD Instruments Inc.
1801 Parkway View Drive
Pittsburgh, PA 15205
PH: 412-788-2830
FAX: [phone]
www.koboldusa.com

Series KPH300
Adjustable Pressure Switch

Precautions

• User's Responsibility for Safety: KOBOLD manufactures a
wide range of process sensors and technologies. While each
of these technologies are designed to operate in a wide
variety of applications, it is the user's responsibility to select a
technology that is appropriate for the application, to install it
properly, to perform tests of the installed system, and to
maintain all components. The failure to do so could result in
property damage or serious injury.

• Wiring and Electrical: Because this is an electrically
operated device, only properly trained personnel should install
and maintain this product. Be sure that the power supplied to
the unit is appropriate for the device. Electrical wiring of the
sensor should be performed in accordance with all applicable
national, state and local codes.

Wiring Diagram:

SPDT Switch Wiring:

• Make a Fail-Safe System: Design a fail-safe system
that accommodates the possibility of sensor, relay or
power failure. In critical applications, KOBOLD
recommends the use of redundant backup systems
and alarms in addition to the primary system.

Switch Adjustment:

Switchpoint:

The switchpoint is adjusted by using a 2 mm hex wrench
inserted into the hex-headed screw within the threaded
electrical connector mounting boss. Clockwise rotation of
the adjusting screw will increase the switchpoint; counter­clockwise rotation will decrease the switchpoint.

CAUTION: Do not attempt to force the adjustment screw
beyond its maximum or minimum adjustment point or
damage to the switch will occur. Typical adjustment range
is ~10-12 turns.

Dimensions:

Hysteresis:

Switch hysteresis is adjusted by using a small, slotted
(blade) screwdriver inserted into the access hole located
near the equipment ground terminal. Clockwise rotation of
the adjusting screw will increase the amount of hysteresis;
counter-clockwise rotation will decrease the amount of
hysteresis. NOTE: Rotating the Hysteresis adjustment
completely clockwise or counter-clockwise will disable the
switch function.

FM Rev. 5/24/12

KPH300_manual