Dwyer instruments, inc – Dwyer DHII User Manual

Page 20

MSP1 and MSP2 (Maintenance Set Point 1 & 2) SUB MENUS

Adjust for the desired maintenance set points when the unit is placed in the maintenance
mode. The deadband is fixed at 2% of full scale. To enter or leave the maintenance mode,
press and hold the for 8 seconds.

ADDR (Modbus

Address ) SUB MENU

Modbus

communication instrument address. Set from 1 to 247. This number must match the

address number used by the host computer.
To obtain the Digihelic

II Controller Modbus

See page 4 for wiring diagram.

WR (Modbus

Write Protect) SUB MENU

d.S - Disables write commands from Modbus

. Modbus

can only read information from the

instrument.

En - Enable write commands from Modbus

. Modbus

can read information from and write

information to the instrument.

ZERO and SPAN (Calibration of Zero and Span) SUB MENUS

The lower display reads CAL in this mode.

ZERO Calibration
Note: For accurate calibration, DO NOT apply any pressure when performing this function.

With the display reading ZERO, press the ENTER key. The upper display will blink. Press
ENTER again to complete the zeroing of the instrument or press the MENU key to cancel.

SPAN Calibration
With the display set to SPAN, apply full scale pressure to the unit. Press the ENTER key. The
upper display will blink. Press ENTER again to complete the calibration or press the MENU key
to cancel.

SP/AL

Printed in U.S.A. 10/13

FR# 19-443434-00 Rev. 3

DWYER INSTRUMENTS, INC.

Phone: 219/879-8000 www.dwyer-inst.com

P.O. BOX 373 • MICHIGAN CITY, IN 46360, U.S.A.

Fax: 219/872-9057 e-mail: [email protected]