Dwyer DHII User Manual

Page 15

ArEA, DIA, XDIM and YDIM SUB MENUS

These SUB MENUS become accessible if the instrument is set for flow. When measuring flow, the
area of the duct must be specified. Tables 3 and 4 show the input range vs maximum flow and duct
size. For a rectangular duct the maximum size is specified in square feet or meters. For a circular duct
the maximum size is specified as the diameter. X, Y and circular dimensions are entered in feet with
0.01 foot resolution for FLOr = LO and 0.1 foot resolution for FLOr = HI, or entered in millimeters with
1 millimeter resolution.

ArEA - Area, select CIR for a circular duct or RECT for a rectangular duct. If a circular duct
is selected, the DIA SUB MENU will be activated. If a rectangular duct is selected, the XDIM
and YDIM SUB MENUS will be activated.

DIA - Diameter, enter the diameter of a duct
XDIM - Enter the “X” dimension of a duct
YDIM - Enter the “Y” dimension of a duct

OUt (Output) MAIN MENU

The OUt MENU selects the output type of the instrument. The SUB
MENUS are:

CtrL- Control type

ALrE - Alarm reset, manual or auto

ISP - SP1 reverse or direct acting

AL.H - Alarm inhibit

AL - Alarm type

ALDL - Alarm delay