Honeywell DirectLine DL421, User Manual, Page: 3 / 40

2/04 DirectLine® DL421 Sensor Module User Manual iii
About This Document
Abstract
This manual contains all the information that is needed to install, configure, calibrate,
operate, and troubleshoot the DirectLine® Sensor. Insert 70-82-10-01, a quick
reference guide for configuring and calibrating the DL421, should accompany this
document.
Contacts
World Wide Web
The following lists Honeywell’s World Wide Web sites that will be of interest to our
customers.
Honeywell Organization WWW Address (URL)
Corporate http://www.honeywell.com
Industrial Measurement and Control http://www.honeywell.com/imc
International
http://www.honeywell.com/Business/global.asp
Telephone
Contact us by telephone at the numbers listed below.
Organization Phone Number
United States and
Canada Honeywell 1-800-423-9883
(215) 641-3610 Tech. Support
1-888-423-9883 Q&A Faxback
(TACFACS)
1-800-525-7439 Service
Symbol Definitions
The following table lists any symbols used in this document to denote certain conditions.
Symbol Definition
Earth Ground. Functional earth connection. NOTE: This connection shall be bonded to
Protective earth at the source of supply in accordance with national and local electrical
code requirements.
ATTENTION, Electrostatic Discharge (ESD) hazards. Observe precautions for handling
electrostatic sensitive devices