Honeywell DirectLine DL421 User Manual

DirectLine® DL421 Sensor Module

®

for Durafet

Meredian

®

II, and HPW7000 pH

II, Durafet® III,

Electrodes

User Manual

70-82-25-102

Rev. 5

2/04

Industrial Measurement and Control

Notices and Trademarks

Copyright 2004 by Honeywell

February, 2004

Warranty/Remedy

Honeywell warrants goods of its manufacture as being free of defective materials and faulty
workmanship. Contact your local sales office for warranty information. If warranted goods are returned to
Honeywell during the period of coverage, Honeywell will repair or replace without charge those items it
finds defective. The foregoing is Buyer's sole remedy and is in lieu of all other warranties, expressed or
implied, including those of merchantability and fitness for a particular purpose. Specifications may
change without notice. The information we supply is believed to be accurate and reliable as of this
printing. However, we assume no responsibility for its use.

While we provide application assistance personally, through our literature and the Honeywell web site, it
is up to the customer to determine the suitability of the product in the application.

CE Conformity

This product is in conformance with the protection requirements of the following European Council
Directives: 89/336/EEC, the Electromagnetic Compatibility Directive and 73/23/EEC, the Low Voltage
Directive. Conformance of this product with any other “CE Mark” Directive(s) shall not be assumed.

ATTENTION

The emission limits of EN 61326 are designed to provide reasonable protection against harmful
interference when this equipment is operated in an industrial environment. Operation of this equipment in
a residential area may cause harmful interference. This equipment generates, uses and can radiate radio
frequency energy and may cause interference to radio and television reception when the equipment is
used closer than 30 m to the antenna(e). In special cases, when highly susceptible apparatus is used in
close proximity, the user may have to employ additional mitigating measures to further reduce the
electromagnetic emissions of this equipment.

Industrial Measurement and Control

Honeywell

1100 Virginia Ave.

Fort Washington, PA 19034

DirectLine is a registered trademark of Honeywell

Durafet and Meredian are U.S. registered trademarks of Honeywell

Other brands or product names are trademarks of their respective owners

Insert 70-82-10-01 should accompany this document.

ii DirectLine® DL421 Sensor Module User Manual 2/04

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

Industrial Measurement and Control

International

http://www.honeywell.com

http://www.honeywell.com/imc

http://www.honeywell.com/Business/global.asp

Telephone

Contact us by telephone at the numbers listed below.

United States and
Canada

Honeywell 1-800-423-9883

Organization Phone Number

[phone] 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

2/04 DirectLine® DL421 Sensor Module User Manual iii

Contents

1. INTRODUCTION....................................................................................................................1

1.1 Overview.........................................................................................................................................1

1.2 Electronics Module ......................................................................................................................... 1

1.3 Operator Interface........................................................................................................................... 2

1.4 Specifications.................................................................................................................................. 3

1.5 Model Selection Guide ................................................................................................................... 4

2. INSTALLATION ..................................................................................................................... 5

2.1 Assembly and Wiring...................................................................................................................... 5

2.2 Integral Mounting............................................................................................................................ 7

2.3 Remote Mounting ...........................................................................................................................8

2.4 Conduit connections ..................................................................................................................... 13

3. CONFIGURATION ............................................................................................................... 14

3.1 Overview.......................................................................................................................................14

3.2 Configuration Set Up Procedure................................................................................................... 15

4. CALIBRATION.....................................................................................................................18

4.1 Calibration Diagnostics................................................................................................................. 18

4.2 Calibration Diagnostic Reset ........................................................................................................ 18

4.3 Calibration..................................................................................................................................... 19

4.4 Calibration in High Purity Water ...................................................................................................22

5. OPERATION ........................................................................................................................ 23

5.1 Displays ........................................................................................................................................ 23

5.2 Diagnostic Error Messages .......................................................................................................... 25

5.3 Unit Reset ..................................................................................................................................... 26

6. SPARE PARTS....................................................................................................................27

7. APPENDIX: CE MARK APPLICATIONS ............................................................................30

8. SALES AND SERVICE........................................................................................................ 32

iv DirectLine® DL421 Sensor Module User Manual 2/04

Tables

Table 2-1 Assembly and Wiring Procedure for Field Wiring Connector___________________________ 6
Table 2-2 Integral Mounting Procedure (refer to Figure 2-3) __________________________________ 7
Table 2-3 Remote Mounting Procedure for Durafet II and Durafet III Electrodes __________________ 8
Table 2-4 Remote Mounting Procedure for Meredian II Electrodes_____________________________ 9
Table 2-5 Remote Mounting Procedure for HPW7000 Electrodes ____________________________ 10
Table 3-1 Buffer Groups and the pH standard values ______________________________________ 14
Table 3-2 Configuration Set Up Procedure ______________________________________________ 15
Table 4-1 Standard pH Buffer Values __________________________________________________ 20
Table 4-2 Zero (Standardization) Calibration Procedure ____________________________________ 21
Table 4-3 Slope Calibration Procedure _________________________________________________ 22
Table 4-4 High purity water calibration Procedure_________________________________________ 22
Table 5-1 Online Parameter Descriptions _______________________________________________ 23
Table 5-2 Display Navigation Procedure ________________________________________________ 24
Table 5-3 Online Diagnostic Errors ____________________________________________________ 25
Table 5-4 Factory Default Values _____________________________________________________ 26

2/04 DirectLine® DL421 Sensor Module User Manual v

Figures

Figure 1-1 DirectLine® Sensor ________________________________________________________ 1
Figure 1-2 Electronics Module _________________________________________________________ 2
Figure 2-1 Cordset Connection and Wiring ________________________________________________ 5
Figure 2-2 Field Wiring Connector______________________________________________________ 6
Figure 2-3 Integral Mounting __________________________________________________________ 7
Figure 2-4 Remote Mounting _________________________________________________________ 11
Figure 2-5 Remote Mounting Hardware_________________________________________________ 12
Figure 7-1 Wiring for CE Mark Applications______________________________________________ 30

vi DirectLine® DL421 Sensor Module User Manual 2/04

Introduction

1. Introduction

1.1 Overview

The DirectLine® Sensor consists of an electronics module connected to a
Durafet® II, Durafet® III, Meredian® II or HPW7000 pH electrode that eliminates

the need for pre-amps, transmitters, and analyzers in pH applications.
The modular electronics design can be separated from the sensor, allowing the

sensor to be easily removed or replaced while retaining power to the electronics
module.

The DL421 electronics module is contained in a Nema Type 4x polysulfone
housing. The Module can be mounted as an integral unit directly connected to the
electrode or remotely using an electrode with a cable. The sealed plastic housing
has plug-in connections for the pH electrode and 4-20 mA cordset.

Figure 1-1 DirectLine® Sensor

1.2 Electronics Module

The electronics module is loop-powered by 16-42 Vdc and will modulate its supply
current from 4 mA to 20 mA, depending upon the pH value that is sensed by the
electrode. The transmitted loop current is compensated for temperature internally
using the standard Honeywell 8550 thermistor.

For submersion or special wiring applications, the remote electronics module is
compatible with the existing Durafet II, Meredian II or HPW7000 technology without
modification. A Durafet II or Meredian II cable length is supported with direct
connection to the electronics module.

A 4-20 mA output connection is provided via a 6m cordset or a customer supplied
cable used in combination with a field wiring connector.

2/04 DirectLine® DL421 Sensor Module User Manual 1

Introduction

Figure 1-2 Electronics Module

1.3 Operator Interface

The DirectLine® Sensor operator interface consists of three pushbuttons and one 4­digit, 7-segment LCD display with 3 decimal points, plus (+), and minus (–) signs. It
is responsible for the display of measured values and configuration of parameter
values.

2 DirectLine® DL421 Sensor Module User Manual 2/04

Introduction

1.4 Specifications

Displayed pH 0-14 pH

Displayed Temperature Range –10 °C to +110 °C (14 °F to 230 °F)

Process Temperature –10 °C to +110 °C (14 °F to 230 °F)

Sensor Survivable Temperature Range
Durafet II & III
Meredian II

Electronics Module Ambient Temperature –20 °C to +85 °C (–4 °F to +185 °F)

Output Type 4-20 mA (2-wire loop powered)

Output Scale 0-14 pH

Output Calibration 4-20 mA

Mating Connector Rating Submersible to 6.1m (20’)

Output (Loop)

User Termination Tinned leads

Cable Lengths
Sensor:

Power

Local Display and Buttons LCD 4-digit, 7-segment

Engineering Units

Calibration Options

Solution Temperature Compensation

Diagnostics Sensor and electronics

Case

Approvals

Remote Mounting Pipe, Wall, or DIN Rail

Dimensions H 123 mm (4.84”) x W 48 mm (1.89”) x D 46 mm (1.81”)

Weight Approximately 142 g (5.0 oz.)

–10 °C to +130 °C (14 °F to 266 °F)
0 °C to 110 °C (32 °F to 230 °F)

6m (19.7’) cordset or Shielded twisted pair with field
wiring connector

Durafet II & Durafet III: 6.1m (20’) or 15.24m (50’)
Meredian II: 3.65m (12’) or 6.1m (20’)
HPW7000: .45m (1.5’) or 10.97m (36’)

16-42 Vdc, 23mA max
Maximum load resistance: 250 ohms at 16 Vdc
600 ohms at 24 Vdc
1400 ohms at 42 Vdc

pH
degrees F
degrees C

1 point Sample or 2 point Sample
Auto Buffer Recognition
Selections: US, NIST, EURO

Selections: 0.00pH/10°C
–0.16pH/10°C
–0.32pH/10°C

Weatherproof, corrosion-resistant plastic housing, NEMA4X

CE Mark for Industrial Applications
UL – General Purpose for Process Control
CSA – General Purpose
FM – CLI, DIV1, Groups A, B, C & D and CLI, Zone 0
AEx ia IIC (IS)
FM – CLI, DIV2, Groups A, B, C & D and CLI, Zone 2,
Groups IIC (N.I. Field Wiring)

2/04 DirectLine® DL421 Sensor Module User Manual 3

Introduction

_-_

y

1.5 Model Selection Guide

Instructions

Select the desired key number. The arrow to the right marks the selection available.
Make the desired selections from Tables I through IV using the column below the
proper arrow. A dot ( ) denotes availability.

Key Number I II III IV

_ _ _ _ _ -_-

-_ _ _ _

Key Number - DirectLine®Sensor Electronics Module

(Specify electrodes/cells/probes separately) Selection

Availability

pH For use with Durafet II, Meredian II & HPW7000 pH electrodes DL421
ORP For use with ORP electrode DL422
Conductivity For use with Contacting Conductivity Cells DL423
DO - PPM For use with Dissolved Oxygen ppm Probes DL424

DO - PPB

TABLE I - OUTPUT CABLE

Output Cable for

Integral or Remote

Mounting

For use with Dissolved Oxygen ppb Probes

None

(replacement module or customer supplied output cable)­Cordset - 6m (19.7 ft.) - includes connector and cable ­Field Wiring Connector only - customer supplies cable only -

Note 1

Note 2

Note 2

DL425

D
E
F

TABLE II - SENSOR CABLE/REMOTE CONNECTOR (between electronic module and electrode, sensor or probe)

Integral Mounting
Remote Mounting
Cable ­Durafet Onl

Remote Mounting
Connector (Cable
is supplied with
sensor or probe)

No cable or connector required

6,096m (20 ft.) of sensor cable - Durafet II Remote Mtg w/PWB connector 1
6,096m (20 ft.) of sensor cable-Durafet III Remote Mtg w/Vario Pin connector-

15,24m (50 ft.) of sensor cable - Durafet II Remote Mtg w/PWB connector
15,24m (50 ft.) of sensor cable - Durafet III Remote Mtg w/Vario Pin connector-Note 3
Remote Mounting Connector - Meredian II pH
Remote Mounting Connector - Meredian II ORP
Remote Mounting Connector - HPW7000
Remote Mounting Connector - Conductivity
Remote Mounting Connector - Dissolved Oxygen

Note 3

0 ddddd

e

7 e
2

e

8

e
e

3
3
4

5
6

e

e

e

ee

TABLE III - REMOTE MOUNTING OPTIONS

Mounting Kit for None Integral unit - mounting not required A
Remote Mounting 2" (5,08 cm) Pipe mtg. bracket, wall mtg, & DIN Rail clip B

TABLE IV - OPTIONS

Tagging

Certificates

None
SS Customer ID Tag - 3 lines w/22 characters/line

None
Calibration & Conformance

Notes:

1

Customers may procure their own output cordsets from the vendors listed below.

2

Customers may make their own 4-20 mA output cordset using a 2-wire twisted shielded pair,
and M12 field wiring connector procured from one of the vendors listed below.
Use only UV rated outdoor cable to maintain NEMA 4 rating.

Cordset SAC-3P-5.0-PUR/M12FSSH Stainless RKV4T-6/S618

M12 Field Wiri ng Connector

Cable

Phoenix Contact

SACC-M12FS-4CON-PG7 B8141-0

2-wire twisted shielded pair

Turck

00 _ _

SS _ _

_ _ 00

_ _ CC

3

Durafet III cables with Vario Pin connector require Durafet III electrode with Vario Pin connector

RESTRICTIONS

Restriction

Letters

d
e

ORDERING INSTRUCTIONS:

1. Part numbers are provided to facilitate Distributor Stock.

2. Orders may be placed either by model selection or by part number.

3. Part numbers are shown within the model selection tables to assist with compatibility information.

4. Orders placed by model selection are systematically protected against incompatibility.

5. Compatibility assessment is the responsibility of the purchaser for orders placed by part number.

6. Items labeled as N/A are not available via the stocking program and must be ordered by model selection.

4 DirectLine® DL421 Sensor Module User Manual 2/04

Available Only With Not Available With

Table

IIl A
III B

Table

SelectionSelection

2. Installation

2.1 Assembly and Wiring

Depending on the customer selected output cable options, the DirectLine can be
wired to an appropriate 16-42 Vdc source using 2 different methods:

1) cordset

2) field wiring with customer supplied cable.
Refer to Section 7 for wiring for CE Mark applications.

2.1.1 Cordset

Power Supply

Minimum: 16 V @ 250 ohms (max.)
Maximum: 42 V @ 1400 ohms (max.)

__

_

++

Installation

Chart Recorder,
Controller, etc.
(Use 250 ohms
for 1-5 V signal)

Load
Resistance

+

Black (–)

*Blue wire not used

Shield
Wire
(Ground)

*

Brown (+)

Cordset 6m (19.7’)

Electronics
Module

Figure 2-1 Cordset Connection and Wiring

2/04 DirectLine® DL421 Sensor Module User Manual 5

Installation

2.1.2 Field Wiring

Refer to Figure 2-2. The field wiring connector supports customer supplied cable with an
outer diameter of 4-6mm.

Table 2-1 Assembly and Wiring Procedure for Field Wiring Connector

Step Procedure

1 Disassemble field wiring connector

a) Unscrew parts to separate pressure screw, clamp type cage, gasket,

housing and female insert.

2 Insert customer supplied cable through connector parts

a) Slide pressure screw over skin and tinned customer cable (note

orientation).
b) Slide clamp type cage over cable (note orientation).
c) Slide gasket over cable.
d) Slide housing over cable (note orientation).

3 Connect wires to pins

Look closely at end of female insert to locate pin numbers. Connect
positive wire to pin 1 and negative wire to pin 4. Remaining wires and
female insert pins 3 and 2 are unused.

4 Assemble field wiring connector

a) Screw female insert to housing until female insert’s o-ring is

compressed.

b) Slide clamp type cage/gasket into housing.

c) Thread pressure screw into housing until ¼ turn past finger tight.

5 Connect cable to source

Wire the other end of the Output cable to a 16-42 Vdc source as indicated
in Figure 2-1. Note: your wire colors may be different.

To Power Supply

Output cable
(Customer supplied)

Pos +

Neg -

Pressure screw
Clamp-type cage
Gasket

Housing

Female insert with 4

numbered pins

6 DirectLine® DL421 Sensor Module User Manual 2/04

Figure 2-2 Field Wiring Connector

2.2 Integral Mounting

Table 2-2 Integral Mounting Procedure (refer to Figure 2-3)

Step Procedure

Connect Electrode to Pipe and Electronics Assembly

1 Screw the electrode into the pipe tee (3/4 “ NPT thread).

Make sure that the final position of the installed electronics module allows the display to
be easily viewed by plant personnel.

2 Align the slots in the electronics module with those in the electrode and press down to

connect the electronics to the electrode.

Installation

3

Tighten the locking screw on the bottom rear of the electronics module.

Electronics
Module

Locking Screw in
Rear of Housing

Step 2

Step 3

2/04 DirectLine® DL421 Sensor Module User Manual 7

Electrode

Step 1

Figure 2-3 Integral Mounting

Installation

2.3 Remote Mounting

Table 2-3 Remote Mounting Procedure for Durafet II and Durafet III Electrodes

Step Procedure (Refer to Figure 2-4 and Figure 2-5)

1 Apply a thin film of silicon grease to the ID of electronics module’s remote mounting

cavity.

2 Connect Remote Sensor Wiring Cable to the Remote Electronics Housing

a) Remove the cover from the remote cable connector.

b) Align the slots in the cable connector housing with those in the electronics module

and push up to connect the cable to the electronics module.

c) Tighten the locking screw on the rear of the electronics module. Make sure the

connector is completely seated.

3 Secure Electronics Module with Wall, Pipe, or DIN Rail Mounting

Mount bracket with clips facing forward, smaller clip on top and larger clip on bottom.

Wall: Use one of three through-holes to secure to wall.

Pipe: Feed hose clamp through two slots and secure to pipe.

DIN rail: Attach the appropriate DIN rail clip to the mounting bracket:

“U” DIN rail—use metal clip and shorter screw (8 mm)
“G” DIN rail—use gray clip and longer screw (10 mm)

Clip can be rotated for horizontal or vertical DIN rails.

Push electronics module onto the remote mounting bracket until it snaps into position.

4 Connect Remote Sensor Wiring Cable to the Remotely Mounted Electrode

Durafet II with PC Board type connector:

a) Remove cover from the remote cable connector.

b) Loosen the ferrule and slide back the ferrule, small O-ring, and plastic cover to

expose the remote cable connector. Align the cable connector keyway with the
electrode key (small black tab on the top of the electrode). Slide the plastic cover
over the electrode end and hand-tighten the cover onto the electrode. Be careful not
to cross the threads of the connector.
Slide the O-ring and ferrule down the cable to the back of the cover cap. Hand­tighten the ferrule onto the cover cap.

-OR-

Durafet III with Vario Pin, 11 conductor connector:

Electrostatic Discharge (ESD) hazards. Observe precautions for handling

electrostatic sensitive devices.
a) Remove cover from the cable connector.
b) Make sure electrode connector and cable connector are clean and dry.
c) Align keyway of Vario Pin connector on electrode with tab inside mating connector

on cable. Press cable connector onto electrode firmly.

d) Tighten knurled busing of cable connector by hand to ensure waterproof seal.

8 DirectLine® DL421 Sensor Module User Manual 2/04

Installation

When the DL421 is specified with Table II = 3, the Remote Connector Assembly (part number
51500768-001) is supplied loose for connection of the Meredian II pH electrode cable to the
DL421 module. Table 2-4 gives the mounting procedure.

Table 2-4 Remote Mounting Procedure for Meredian II Electrodes

Step Procedure (Refer to Figure 2-4 and Figure 2-5)

1 Turning counterclockwise, remove strain relief/cover combination from the remote

connector assembly.

2 Remove the protective plastic bag from the end of the electrode cable. Be careful to

keep bare fingers away from coax cable termination.

3 Loosen and remove compression cap from strain relief fitting. Carefully push cable end

through cap and strain relief fitting so that these parts are strung back along cable
jacket.

4

5

6 Slide cap along cable and tighten onto cable jacket with small wrench until cable cannot

7

8 Apply a thin film of silicon grease to the ID of electronics module’s remote mounting

9 Plug remote connector assembly into DL421 module aligning polarity tab of module

10 Secure Electronics Module with Wall, Pipe, or DIN Rail Mounting

Connect cable leads as follows:

Terminal 1 = Orange Reference Electrode Lead
Terminal 2 = White Temperature Compensation Lead
Terminal 3 = White Temperature Compensation Lead
Terminal 4 = Pigtail Shield Lead
Terminal 5 = NC (No Connection)
Terminal 6 = Coax Measuring Electrode Lead
Earth Ground = Yellow

Slide cover along cable and tighten by hand onto the remote connector assembly.

slide within strain relief rubber bushing.

Remove yellow protective sleeve from opposite end of connector assembly.

cavity.

housing and mating groove on connector.

Mount bracket with clips facing forward, smaller clip on top and larger clip on bottom.

Wall: Use one of three through-holes to secure to wall.

Pipe: Feed hose clamp through two slots and secure to pipe.

DIN rail: Attach the appropriate DIN rail clip to the mounting bracket:

Clip can be rotated for horizontal or vertical DIN rails.

Push electronics module onto the remote mounting bracket until it snaps into position.

2/04 DirectLine® DL421 Sensor Module User Manual 9

“U” DIN rail—use metal clip and shorter screw (8 mm)
“G” DIN rail—use gray clip and longer screw (10 mm)

Installation

When the DL421 is specified with Table II = 4, the Remote Connector Assembly (part number
51500768-002) is supplied loose for connection of the HPW7000 electrode cables to the DL421
module. Table 2-5 gives the mounting procedure.

Table 2-5 Remote Mounting Procedure for HPW7000 Electrodes

Step Procedure (Refer to Figure 2-4 and Figure 2-5)

1 Turning counterclockwise, remove strain relief/cover combination from the remote

connector assembly.

2 Remove the protective plastic bag from the end of the measuring electrode cable. Be

careful to keep bare fingers away from coax cable termination.

3 Loosen and remove compression cap from strain relief fitting. Carefully push all 3 cable

ends through cap and strain relief fitting so that these parts are strung back along cable
jacket.

4

5

6 Slide cap along cables and tighten onto cable jackets with small wrench until cables

7

8 Apply a thin film of silicon grease to the ID of electronics module’s remote mounting

9 Plug remote connector assembly into DL421 module aligning polarity tab of module

10 Secure Electronics Module with Wall, Pipe, or DIN Rail Mounting

Connect cable leads as follows:

Terminal 1 = Clear Reference Electrode Coax Lead
Terminal 2 = Black Temperature Compensation Lead
Terminal 3 = White Temperature Compensation Lead
Terminal 4 = Black/White Measuring Electrode Coax Shield
Terminal 5 = Clear Measuring Electrode Coax Lead
Terminal 6 = No Connection
Earth Ground = (3) Green/White Leads from Measuring, Reference and
Temperature

Slide cover along cables and tighten by hand onto the remote connector assembly.

cannot slide within strain relief rubber bushing.

Remove yellow protective sleeve from opposite end of connector assembly.

cavity.

housing and mating groove on connector.

Mount bracket with clips facing forward, smaller clip on top and larger clip on bottom.

Wall: Use one of three through-holes to secure to wall.

Pipe: Feed hose clamp through two slots and secure to pipe.

DIN rail: Attach the appropriate DIN rail clip to the mounting bracket:

Clip can be rotated for horizontal or vertical DIN rails.

Push electronics module onto the remote mounting bracket until it snaps into position.

10 DirectLine® DL421 Sensor Module User Manual 2/04

“U” DIN rail—use metal clip and shorter screw (8 mm)
“G” DIN rail—use gray clip and longer screw (10 mm)

Electronics
Module

Cable

Connector

Housing

Cable

Connector

Cover

Remote Electronics

Module for

Durafet II or III Electrodes

Locking Screw in
Rear of Housing

Remote Wiring Cable

20 or 50 Feet

Electrode

Electronics
Module

Protective
Vinyl Boot
(remove)

Cover

Strain
Relief

Compression
Cap

Remote Wiring Cable

12 or 20 Feet for

Meredian II Electrodes,

1.5 or 36 Feet for
HPW7000

Electrode

Meredian II Electronics

1

Orange Reference Electrode Lead

2

White Temperature Compensation Lead

3

White Temperature Comp ensation Lead

4

Pigtail Shield Lead

5

1 Meg-ohm resistor (pre-installed by
Honeywell)

6

Coax Measuring Electrode Lead and
1 Meg-ohm resistor (pre-installed by
Honeywell)

6

5

4

1

2

3

6

5

4

1

2

3

HPW7000 Electronics

1

Clear Referen ce Coax Lead

2

Black Temperature Sensor Lead

3

White Temperature Sensor Lead

4

Black/White Measuring Shield

5

Clear Measuring Coax Lead

6

No Connection

Note: Three Green/White leads to DL421
mounting bracket screw. Mounting bracket
must be connected to earth ground.

Installation

2/04 DirectLine® DL421 Sensor Module User Manual 11

Remote Electronics

Module for

Meredian II Electrodes

and HPW7000

Figure 2-4 Remote Mounting

Installation

Hose Clamp Slot

for Pipe Mounting

(Hose Clamp

included in kit)

Through Hole for
DIN Rail Mounting

Metal clip for

“U” DIN rail mounting

Gray clip for

“G” DIN rail mounting

Mounting Kit

View from End

Panel

Terminal Connectors

Front View

“U” Style DIN Rail

Barriers, Repeater, Isolators

View from End

PanelPanel

Front View

“G” Style DIN Rail

Figure 2-5 Remote Mounting Hardware

12 DirectLine® DL421 Sensor Module User Manual 2/04

Installation

2.4 Conduit connections

The DirectLine provides a male ½” NPT thread to accommodate a customer conduit
connection. Use ½” conduit coupling (min. 38.1mm (1.5”) long) on DL conduit
connection to clear cordset connector. Conduit can not be used with field wiring
connector due to size restriction.

Do not exceed 200in-lb. torque when attaching fixed piping.
Use wrench flats provided under the ½” NPT threads to support the DirectLine

during installation.

2/04 DirectLine® DL421 Sensor Module User Manual 13

Configuration

3. Configuration

3.1 Overview

Configuration Parameters

Set Up consists of configuring the following functions:

• Buffer Group Selection – Only used with Auto Buffer Recognition calibrations.

Determines the set of standard pH buffer values to be used for Zero
(standardization) and Slope calibration by automatic buffer recognition. Each of
the available Buffer Groups is a set of 5 pH buffer standards that you can
select.
The available groups are: US (default), NIST, and EURO.

Table 3-1 Buffer Groups and the pH standard values

Buffer Group pH Buffers Display
US (default)
NIST
EURO

2 4 7 10 12

1.68 4.01 6.86 9.18 12.45
1 3 6 8 10

• Solution Temperature Coefficient – Typically only used in power plants for

condensate/feedwater applications. Measured pH is displayed and transmitted
to a pH value normalized to what the pH value would be if the temperature of
the process was 25 °C. Magnitude of normalization is dependent upon the
Solution Temperature coefficient, expressed in units of pH/10 °C with precision
to the hundredth decimal place.
The three available values are: 0.00 (standard setting, default), −0.16 pH/10 °C

(pure water), and −0.32 pH/10 °C (condensate/feedwater).

• Noise Suppression Frequency Selection – Selection of 50 Hz or 60 Hz.

Defaults to 60 Hz at unit reset.

• Output Configuration – The following Output Configuration functions can be

selected:

 0% Range 0 % Range values can be adjusted within a range

0.00 to 14.00 pH in 0.50 pH increments.

 100% Range 100 % Range values can be adjusted within a range

0.00 to 14.00 pH in 0.50 pH increments.

 0% Calibration Output current can be typically adjusted to within a

range of 3.80 mA to 4.40 mA.

 100% Calibration Output current can be typically adjusted to within a

range of 19.60 mA to 20.40 mA.

US

nISt

Euro

14 DirectLine® DL421 Sensor Module User Manual 2/04

Configuration

3.2 Configuration Set Up Procedure

ATTENTION:

In Table 3-2, under the Press column:

• Hold means to hold the button down until the display changes.

• Momentarily means to press and release the indicated button.

From the Online pH display, follow this procedure.

ATTENTION:

If no key is pressed for 60 seconds, the display will abort the entry mode and default to Online Display.

Table 3-2 Configuration Set Up Procedure

Step Operation Press Display

Enter Buffer Group

1

Selection

Edit Buffer Group

Select desired Buffer
Group

Save the Buffer Group

Enter Solution

2

Temperature
Coefficient Selection

Edit Solution
Temperature Coefficient

Select desired
Coefficient

Save the Solution
Temperature coefficient

MODE

Hold

MODE

Hold

Momentarily

MODE

Momentarily

MODE

Momentarily

MODE

Hold

Momentarily

MODE

Momentarily

bFrG (for 1 second) then,
(Current Buffer Group Selection)

Flashing Display – You are now in EDIT mode

(Value of current Buffer Group selection)

To select US (default), NIST, or Euro

Selection for group

COEF (for 1 second) then,
(Solution Temperature Coefficient Selection)

Flashing Display – You are now in EDIT mode

(Value of current Coefficient selection)

To select: 0.00 pH/10°C (default) or

−0.16 pH/10°C (pure water)

−0.32 pH/10°C (AVT, Amine,
Phosphate or Oxygenated Treatment

Selection for coefficient

2/04 DirectLine® DL421 Sensor Module User Manual 15

Configuration

Step Operation Press Display

Enter Noise

3

Suppression
Frequency

Edit Noise Suppression
Frequency

Select desired
Frequency

Save the Noise
Suppression Frequency

Enter Output

4

Configuration

0% Range Value
Selection

Edit 0 % Range Value
Selection

Select desired 0 % pH
Value

Save the New 0 %
Range Value

MODE

Momentarily

MODE

Hold

Momentarily

MODE

Momentarily

MODE

Momentarily

Momentarily

MODE

Hold

Momentarily

MODE

Momentarily

nSUP (for 1 second) then,
(Noise Suppression Frequency Selection)

Flashing Display – You are now in EDIT mode

(Value of current Frequency selection)

To select 50 Hz or 60 Hz (default)

Selection for frequency

OutC Enter Output Calibration

rnGL (for 1 second) then,

(value of current 0 % Range Value Selection)

Flashing Display – You are now in EDIT mode

Value of current 0 % selection)

Selected 0 % pH Value in 0.50 pH increments

Range: 0.00 to 14.00 pH (default 0.00)

(New Value)

100 % Range Value

5

Selection

Edit 100 % Range Value
Selection

Select 100 % pH Value

Save the New 100 %
Range Value

0 % Calibration

6

Adjust 0 % Calibration

Save 0 % Calibration

Momentarily

MODE

Hold

Momentarily

MODE

Momentarily

Momentarily

MODE

Hold

Momentarily

MODE

Momentarily

rnGH (for 1 second) then,

(value of current 100% Range Value Selection)

Flashing Display – You are now in EDIT mode
(value of current 100 % selection)

Selected 100 % pH Value in 0.50 pH increments

Range: 0.00 to 14.00 pH (default 14.00)

(New Value)

AdJL

AdJL (flashes) – You are now in EDIT mode
Range: 3.80 to 4.40 mA typically (default 4.00 mA)

+AdJL (increments value)

−AdJL (decrements value)

AdJL

16 DirectLine® DL421 Sensor Module User Manual 2/04

Configuration

Step Operation Press Display

100 % Calibration

7

Adjust 100 %
Calibration

Save 100 % Calibration

Return to Online Display

8

Momentarily

MODE

Hold

Momentarily

MODE

Momentarily

MODE

Momentarily

AdJH

AdJH (flashes) – You are now in EDIT mode

Range: 19.60 to 20.40 mA typically
(default 20.00 mA)

+AdJH (increments value)

−AdJH (decrements value)

AdJH

Returns to Online Display

2/04 DirectLine® DL421 Sensor Module User Manual 17

Calibration

4. Calibration

4.1 Calibration Diagnostics

Introduction

The manual and automatic standardization and slope adjustments change the zero
offset and the percent theoretical slope calibration diagnostics used by this system.
These values are viewed as read-only information. It is good practice to observe
these values after calibration. Monitoring the values over time will help you predict
when the electrode will need to be replaced.

Zero Offset pH Value

When Online pH value is displayed, PRESS 1button momentarily to display the
current Zero Offset value in fixed hundredths decimal position.

Zero Offset is non-volatile and is initialized to 0.00 pH at unit reset.
It has a range of –2.00 pH to +2.00 pH and it is updated after each calibration.

Percent Theoretical Slope Value

When Online pH value is displayed, PRESS 2 button momentarily to display the
current Percent Theoretical Slope value in fixed tenths decimal position.

Percent Theoretical Slope is non-volatile and is initialized to 100.0 % at unit reset.
It has a range of 80.0 % to 105.0 % and it is updated after each calibration.

60 Second Timeout

If no key is pressed for 60 seconds, the display will abort the entry mode and default
to Online Display.

4.2 Calibration Diagnostic Reset

Introduction

When a new electrode is installed, the indicated pH will use the zero offset and
percent theoretical slope values from the previous calibration. Depending on the
condition of the replaced electrode, the difference between the known and indicated
pH of the new electrode may vary as much as several pH units. A calibration on the
new electrode will correct this difference.

ATTENTION:

If Auto Buffer Recognition (ABR) calibration is used when the new electrode is calibrated for the first time,
the ABR calibration may select a buffer value from the selected standard buffer group table (Table 4-1)
that is directly above or below the actual buffer value.

To avoid this discrepancy, follow one of the two procedures listed below:

1. Select the correct buffer value by following Step 2B of Table 4-3.

2. Perform a calibration diagnostic reset as described below prior to performing an ABR calibration on
the new electrode.

18 DirectLine® DL421 Sensor Module User Manual 2/04

Calibration

Zero Offset pH Value and Percent Theoretical Slope Value

a) Momentarily press 1 to view the Zero Offset value. From this display press and

hold the 1 button until the Zero Offset pH value resets to factory default “0.00”.
The Percent Theoretical Slope value resets to factory default “100.0” at the same
time (approximately 10 seconds).

b) Press MODE button, or wait 60 seconds, to return to Online pH.

4.3 Calibration

Overview

ATTENTION:

If a Solution Temperature Compensation Coefficient was selected per Configuration Section 3.2, this
coefficient is disabled while calibration is being performed.

Calibration consists of the following functions:

• Calibrating the Zero (Standardization) – Manual or automatic pH calibration. In

auto calibration, you can select one of the other buffer pH values directly above
or below the recognized buffer value in the current buffer group. (See Table
4-1.)

• Calibrating the Slope - Manual or automatic pH calibration. In auto calibration,

you can select one of the other buffer pH values directly above or below the
recognized buffer value in the current buffer group. (See Table 4-1.)

2/04 DirectLine® DL421 Sensor Module User Manual 19

Calibration

Table 4-1 Standard pH Buffer Values

Temp °C

Group Buffer

US

(default)

2

4

7

10

12

NIST

1.68

4.01

6.86

9.18

12.45

EURO 1

3

6

0 5 10 15 20 25 30 35 40 45 50

2.01 2.01 2.01 2.01 2.00 2.00 2.00 2.00 2.00 2.00 2.00

4.01 3.99 4.01 3.99 4.00 4.00 4.01 4.02 4.03 4.04 4.05

7.13 7.10 7.07 7.05 7.02 7.00 6.99 6.98 6.97 6.97 6.97

10.34 10.26 10.19 10.12 10.06 10.00 9.94 9.90 9.85 9.82 9.78

12.60 12.44 12.28 12.14 12.00 11.88 11.79 11.66 11.53 11.43 11.32

1.67 1.67 1.67 1.67 1.68 1.68 1.68 1.69 1.69 1.70 1.71

4.01 4.00 4.00 4.00 4.00 4.01 4.01 4.02 4.03 4.04 4.06

6.98 6.95 6.92 6.90 6.88 6.86 6.85 6.84 6.84 6.83 6.83

9.48 9.40 9.33 9.28 9.23 9.18 9.14 9.10 9.07 9.04 9.01

13.42 13.21 13.01 12.80 12.64 12.45 12.30 12.13 11.99 11.84 11.71

0.98 0.98 0.99 0.99 1.00 1.00 1.01 1.01 1.01 1.01 1.02

3.02 3.02 3.02 3.02 3.00 3.00 2.99 2.99 2.98 2.98 2.97

6.03 6.02 6.01 6.00 6.00 6.00 6.00 6.01 6.02 6.04 6.05

8

10

8.15 8.11 8.07 8.03 8.00 7.97 7.94 7.91 7.88 7.87 7.86

10.22 10.17 10.12 10.05 10.00 9.95 9.90 9.86 9.82 9.78 9.74

20 DirectLine® DL421 Sensor Module User Manual 2/04

Calibration

Calibration Procedures

ATTENTION:

CAL2 must be done within 10 minutes of CAL1, otherwise CAL1 must be repeated to enable CAL2.

ATTENTION:

In Table 4-2 and Table 4-3, under the Press column:

• Hold means to hold the button down until the display changes.

• Momentarily means to press and release the indicated button.

Table 4-2 Zero (Standardization) Calibration Procedure

Step Operation Press Display

OR

Enter Zero

1

(Standardization)
Calibration

Do Sample (Manual)

2A

Calibration

Edit Buffer Value

Save New Buffer
Value

Do Auto Buffer

2B

Recognition
Calibration

Edit Group Buffer
Value

1

Hold

1

Momentarily

Momentarily

Momentarily

Momentarily

or

MODE

1

Hold

or

CAL1

For Sample (Manual) calibration, go to step 2A.
OR

For Auto Buffer Recognition calibration, go to

step 2B.

SCAL for one second,

then displays Live Buffer Value.

To edit Buffer Value (Flashing Display)

Buffer Value is saved and goes to Online Display.

ACAL for one second,

then displays closest Group Buffer Value.
(Flashing Display until stable reading is achieved

“New Value” – Selects ± 1 buffer group
(Flashing Display until stable reading is achieved)

then goes to Online Display.

2/04 DirectLine® DL421 Sensor Module User Manual 21

Calibration

Table 4-3 Slope Calibration Procedure

Step Operation Press Display

2A

OR

2B

Enter Slope Calibration

1

Do Sample (Manual)
Calibration

Edit Buffer Value

Save New Buffer
Value

Do Auto Buffer

Recognition
Calibration

Edit Group Buffer
Value

2

Hold

2

Momentarily

Momentarily

Momentarily

Momentarily

or

MODE

Hold

2

or

CAL2

For Sample (Manual) calibration, go to step 2A.
OR

For Auto Buffer Recognition calibration, go to

step 2B.

SCAL for one second then,

displays Live Buffer Value

To edit Buffer Value (Flashing Display)

Buffer Value is saved and goes to Online Display.

ACAL for one second then,

displays closest Group Buffer Value
(Flashing Display until stable reading is achieved

“New Value” – Selects ± 1 buffer group
(Flashing Display until stable reading is achieved)

then goes to Online Display

4.4 Calibration in High Purity Water

When the DirectLine module is used with the HPW7000 High pHurity Water
Assembly an addition calibration step may be required. This involves doing an
independent check of the pH with a portable lab meter and then, if necessary, a
Sample Cal to correct the reading.

Table 4-4 High purity water calibration Procedure

Step Procedure

Perform a 2-point calibration using either the Auto Buffer Recognition Calibration or Manual

1

Calibration per section 4.3.

Return the HPW7000 electrodes to the flow chamber and restart flow to the chamber.

2

Allow the flow chamber to “clean out” by flowing sample through the chamber for at least an

3

hour.

Check the pH of the process using a portable instrument that uses a flowing reference type

4

electrode. Make sure the sample is not exposed to air, otherwise the pH due to absorption
of carbon dioxide from the air.

If necessary adjust the HPW7000 pH to agree with the portable instrument reading by doing a 1-

5

point Sample Cal per section 4.3.

22 DirectLine® DL421 Sensor Module User Manual 2/04

Operation

5. Operation

5.1 Displays

Overview

The DirectLine® DL421 displays the pH value, Temperature, Zero Offset pH value, and Percent
Theoretical Slope online. The table below describes these parameters.

Table 5-1 Online Parameter Descriptions

Parameter Description

Online pH

Online Temperature

Zero Offset pH
Value

Percent Theoretical
Slope Value

Measured pH expressed with fixed hundredths decimal precision.
Range: 0.00 to 14.00

Measured temperature expressed with fixed tenths decimal precision.
Temperature displayed in °C or °F
Range: −10.0 to 110.0 °C

−14.0 to 230.0 °F

Zero Offset pH value expressed with fixed hundredths decimal precision.
Range: −2.00 to +2.00 pH

Percent Theoretical Slope value expressed with fixed tenths decimal precision.
Range: 80.0 % to 105.0 %

The default display and home position is the Online pH display. It appears when:

 The unit is powered up
 No button presses for 60 seconds
 A successful Zero (Standardization) or Slope calibration has occurred in Auto Buffer

Recognition

 The Mode button has been pressed during Zero (Standardization) or Slope calibration

(Sample Calibration)

 The Mode button has been pressed during a configuration edit

The measurement and display of pH is updated at a rate of 500 ms.

2/04 DirectLine® DL421 Sensor Module User Manual 23

Operation

ATTENTION:
In Table 5-2, under the Press column:

• Momentarily means to press and release the indicated button.

Table 5-2 Display Navigation Procedure

Step Operation Press Display

View Online pH value MODE

1

View Online Temperature MODE

2

Toggle Online

2A

Temperature display units

Return to home position MODE

3

Momentarily

Momentarily

or

Momentarily

Momentarily

(measured pH)

(measured temperature in °C or °F)

Proceed to step 2A or step 3.

(measured temperature in °C or °F)

Proceed to step 3.

(measured pH)

24 DirectLine® DL421 Sensor Module User Manual 2/04

Operation

5.2 Diagnostic Error Messages

When a diagnostic error or status condition occurs, the Online Display alternates
between measured pH and a text message.

Table 5-3 Online Diagnostic Errors

What you see What it is What to do

CNFG

FALT

These errors may occur when online pH or temperature is displayed.

P HI

P LO

PRBE

T HI

T LO

These errors may occur during probe calibration and abort the calibration process.

FAIL

Data error detected. Reset unit or cycle power.

Second occurrence will show
FALT.

Unit electronics are defective. Replace electronics module.

Measured pH is > 14.00 pH Bring process within limits

Measured pH is < 0.00 pH Bring process within limits

Probe is defective, removed from process, or not
connected.

Forces the output to burnout level (greater than

21.8 mA).

Measured temperature is > 110 °C

Measured temperature is < −10 °C

These error messages are preceded by the
message “FAIL”

BFRS The Slope buffer is less than 2 pH from

Zero (Standardization) buffer.

SRNG The Slope calibration failed due to a

calculated Percent Theoretical Slope value
outside the range of 80.0 % to 105.0 %.

STBL The Zero (Standardization) or Slope

calibration failed due to measured pH
instability.

TRNG The Zero (Standardization) or Slope

calibration failed due to solution
temperature outside the range of 0 °C to 50
°C. (Auto Buffer Recognition calibration
only)

ZRNG The Zero (Standardization) calibration

failed due to a calculated Zero Offset value
outside the range of –2.00 pH to 2.00 pH.

Check probe, connection and
presence of sample.

When the source of the error is
removed, the error will clear and
the output will return to normal
operation.

Bring process within limits

Bring process within limits

Press Mode to return to online
display.

2/04 DirectLine® DL421 Sensor Module User Manual 25

Operation

5.3 Unit Reset

Overview

Unit Reset initializes all of the DirectLine® Sensor’s calibration and configuration
data to factory default values.

Procedure

• From the Online pH display, press and hold the 1 and 2 buttons

simultaneously until “rSEt” appears on the display (minimum of 10 seconds).

• “rSEt” will remain on the display until reset is complete. Next, the firmware
version number appears briefly and the unit then returns to the Online pH
display.

Table 5-4 Factory Default Values

Data Default Values

Zero Offset

Slope

Online Temperature

Buffer Group Selection

Solution Temperature Coefficient Selection

Noise Suppression Frequency Selection

Output Configuration – 0 % Range Value

Output Configuration – 100 % Range Value

Output Configuration – 0 % Calibration

Output Configuration – 100 % Calibration

0.00 pH

100.0 %

°C

US

0.00 pH/10 °C

60 Hz

0.00 pH

14.00 pH

4.00 mA typically

20.00 mA typically

26 DirectLine® DL421 Sensor Module User Manual 2/04

Spare Parts

6. Spare Parts

Part Number Description

51452682-001 DirectLine® DL421 Sensor Module (Replacement Module)

51452683-001 6 m cordset

51452684-002 Field Wiring connector (supports customer supplied cable (4-6mm OD))

51500270-001 Remote Electrode Mounting Cable – 20 foot (Durafet II only)

51500270-002 Remote Electrode Mounting Cable – 50 foot (Durafet II only)

51453225-001 Remote Electrode Mounting Cable – 20 foot (Durafet III only)

51453225-002 Remote Electrode Mounting Cable – 50 foot (Durafet III only)

31086221

51452655-001 Remote Mounting Kit for Wall, Pipe, or DIN Mounting

51500768-001

51500768-002

51452706-001 Locking screw (locks sensor module to electrode or remote connector)

O-ring for Integral Durafet Electrode or Remote Electrode Mounting Cable
or
External O-ring for Integral Meredian Electrode or Remote Electrode Cable
Connector

Remote Electrode Cable Connector Assembly (Meredian II Electrodes)
— Includes O-rings and strain relief

Remote Electrode Cable Connector Assembly (HPW7000 Electrodes)
— Includes O-rings and strain relief

Cordset

The cordset connection is an M12 female type that can be purchased directly from
Honeywell or from multiple vendors including:

Turck Industries

Part Number RKV4T-6/S618 for a 6 m cordset with a stainless coupling nut
Part Number RK4T-6/S618 for a 6 m cordset with a nickel plated coupling nut

Phoenix Contact

Part Number SAC-3P-5.0-PUR/M12FSSH Stainless for a 5m cordset with a stainless coupling nut
Part Number SAC-3P-5.0-PUR/M12FSSH for a 5m cordset with a nickel plated coupling nut

Field Wiring connector

The Field Wiring Connector is an all-plastic screw terminal M12 female type that can
be purchased directly from Honeywell or from multiple vendors including:

Turck Industries

Part Number B8141-0 for a M12 field wiring connector that accommodates customer supplied
cable.

Phoenix Contact

Part Number SACC-M12FS-4CON-PG7 for a M12 field wiring connector that accommodates
customer supplied cable.

2/04 DirectLine® DL421 Sensor Module User Manual 27

Spare Parts

28 DirectLine® DL421 Sensor Module User Manual 2/04

Spare Parts

2/04 DirectLine® DL421 Sensor Module User Manual 29

Appendix: CE Mark Applications

7. Appendix: CE Mark Applications

In situations where the pH display appears to fluctuate (short deviations above 0.2 pH
points) due to field wiring electrical noise, the noise may be reduced by making the
additional ground connections as described in Figure 7-1.

Output cable

Qty. (2)
#8 screws

Step 3

Connect yellow
wire to screw on
mounting bracket.

Figure 7-1 Wiring for CE Mark Applications

Step 1

Connect or mount
bracket to earth
ground.

Step 2

Carefully remove
shrink tubing cover
(Durafet II only)

Remote cable option

30 DirectLine® DL421 Sensor Module User Manual 2/04

Appendix: CE Mark Applications

2/04 DirectLine® DL421 Sensor Module User Manual 31

Appendix

For application assistance, current specifications, pricing, or name of the nearest Authorized Distributor,
contact one of the offices below.

ARGENTINA

HONEYWELL S.A.I.C.
BELGRANO 1156
BUENOS AIRES
ARGENTINA
Tel. : [phone]

ASIA PACIFIC

HONEYWELL ASIA
PACIFIC Inc.
Room 3213-3225
Sun Kung Kai Centre
N° 30 Harbour Road
WANCHAI
HONG KONG
Tel. : [phone]

AUSTRALIA

HONEYWELL LIMITED
5 Thomas Holt Drive
North Ryde Sydney
NSW AUSTRALIA 2113
Tel. : [phone]
AUSTRIA

HONEYWELL AUSTRIA

G.m.b.H.
Handelskai 388
A1020 VIENNA
AUSTRIA
Tel. : [phone]

BELGIUM

HONEYWELL S.A.
3 Avenue de Bourget
B-1140 BRUSSELS
BELGIUM
Tel. : [phone]

BRAZIL

HONEYWELL DO
BRAZIL

AND CIA
Rua Jose Alves Da
Chunha
Lima 172
BUTANTA

05360.050 SAO PAULO
SP
BRAZIL
Tel. : [phone]

BULGARIA

HONEYWELL EOOD
14, Iskarsko Chausse
POB 79
BG- 1592 Sofia
BULGARIA
Tel : [phone]/
794027/ 792198

8. Sales and Service

CANADA

HONEYWELL LIMITED
THE HONEYWELL

CENTRE
300 Yorkland Blvd.
NORTH YORK,

ONTARIO
M2J 1S1
CANADA
Tel.: [phone]
Fax:: [phone]

CZECH

REPUBLIC
HONEYWELL, Spol.s.r.o.
Budejovicka 1
140 21 Prague 4
Czech Republic
Tel. : [phone]

DENMARK

HONEYWELL A/S
Automatikvej 1
DK 2860 Soeborg
DENMARK
Tel. : [phone]

FINLAND

HONEYWELL OY
Ruukintie 8
FIN-02320 ESPOO 32
FINLAND
Tel. : [phone]

FRANCE

HONEYWELL S.A.
Bâtiment « le Mercury »
Parc Technologique de St
Aubin
Route de l’Orme
(CD 128)
91190 SAINT-AUBIN
FRANCE
Tel. from France:
01 60 19 80 00
From other countries:
33 1 60 19 80 00

GERMANY

HONEYWELL AG
Kaiserleistrasse 39
D-63067 OFFENBACH
GERMANY
Tel. : [phone]

HUNGARY

HONEYWELL Kft
Gogol u 13
H-1133 BUDAPEST
HUNGARY
Tel. : [phone]

ICELAND

HONEYWELL
Hataekni .hf
Armuli 26
PO Box 8336
128 reykjavik
Iceland
Tel : [phone]

ITALY

HONEYWELL S.p.A.
Via P. Gobetti, 2/b
20063 Cernusco Sul
Naviglio
ITALY
Tel. : [phone]

MEXICO

HONEYWELL S.A. DE
CV
AV. CONSTITUYENTES
900
COL. LOMAS ALTAS
11950 MEXICO CITY
MEXICO
Tel : [phone]

THE NETHERLANDS

HONEYWELL BV
Laaderhoogtweg 18
1101 EA AMSTERDAM
ZO
THE NETHERLANDS
Tel : [phone]

NORWAY

HONEYWELL A/S
Askerveien 61
PO Box 263
N-1371 ASKER
NORWAY
Tel. : [phone]

POLAND

HONEYWELL Sp.z.o.o
UI Domainewksa 41
02-672 WARSAW
POLAND
Tel. : [phone]

PORTUGAL

HONEYWELL
PORTUGAL LDA
Edificio Suecia II
Av. do Forte nr 3 - Piso 3
2795 CARNAXIDE
PORTUGAL
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REPUBLIC OF IRELAND

HONEYWELL
Unit 1
Robinhood Business
Park
Robinhood Road
DUBLIN 22
Republic of Ireland
Tel. : [phone]

REPUBLIC OF
SINGAPORE

HONEYWELL PTE LTD
BLOCK 750E CHAI
CHEE ROAD
06-01 CHAI CHEE IND.
PARK
1646 SINGAPORE
REP. OF SINGAPORE
Tel. : [phone]

REPUBLIC OF SOUTH
AFRICA

HONEYWELL
Southern Africa
PO BOX 138
Milnerton 7435
REPUBLIC OF SOUTH
AFRICA
Tel. : [phone]

ROMANIA

HONEYWELL Office
Bucharest
147 Aurel Vlaicu Str.,
Sc.Z.,
Apt 61/62
R-72921 Bucharest
ROMANIA
Tel : [phone]/
211 79

RUSSIA

HONEYWELL INC
4 th Floor Administrative
Builiding of AO "Luzhniki"
Management
24 Luzhniki
119048 Moscow
RUSSIA
Tel : [phone]

SLOVAKIA

HONEYWELL Ltd
Mlynske nivy 73
PO Box 75
820 07 BRATISLAVA 27
SLOVAKIA
Tel. : [phone]/
425

SPAIN

HONEYWELL S.A
Factory
Josefa Valcarcel, 24
28027 MADRID
SPAIN
Tel. : [phone]

SWEDEN

HONEYWELL A.B.
S-127 86 Skarholmen
STOCKHOLM
SWEDEN
Tel. : [phone]

SWITZERLAND

HONEYWELL A.G.
Hertistrasse 2
8304 WALLISELLEN
SWITZERLAND
Tel. : [phone]

TURKEY

HONEYWELL
Otomasyon ve Kontrol
Sistemlen San ve Tic
A.S.
(Honeywell Turkey A.S.)
Emirhan Cad No 144
Barbaros Plaza C. Blok
Kat 18
Dikilitas 80700 Istanbul
TURKEY
Tel : [phone]

UNITED KINGDOM

HONEYWELL
Unit 1,2 &4 Zodiac House
Calleva Park
Aldermaston
Berkshire RG7 8HW
UNITED KINGDOM
Tel : [phone]

U.S.A.

HONEYWELL INC.
INDUSTRIAL PROCESS

CONTROLS
1100 VIRGINIA DRIVE
PA 19034-3260
FT. WASHINGTON
U.S.A.
Tel. : [phone]

VENEZUELA

HONEYWELL CA
APARTADO 61314
1060 CARACAS
VENEZUELA
Tel. : [phone]

32 DirectLine® DL421 Sensor Module User Manual 2/04

2/04 DirectLine® DL421 Sensor Module User Manual 33

Industrial Measurement and Control

Honeywell
1100 Virginia Drive
Fort Washington, PA 19034

70-82-25-102 0204 Printed in USA www.honeywell.com/imc