DH Instruments PPC2 AF - Driver Board; Barometer Board

PPC2 AF OPERATION AND MAINTENANCE MANUAL
© 1998 DH Instruments, Inc. Page 4
1.2.5 DRIVER BOARD
Internal Layout
The driver board is controlled by the micro card (see Section 1.2.4). It supports the
12 V drivers for the internal and external solenoid valve actuation and the barometer board
(see Section 1.2.6). It also supplies power to the cooling fan.
1.2.6 BAROMETER BOARD
Internal Layout
The barometer board supports a board mounted, barometric range, micromachined silicon
sensor and an ambient temperature sensor. The barometer readings are used for dynamic
atmospheric pressure compensation when measuring gauge pressure with an absolute
reference transducer.