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Introduction 

 

2 

DirectLine® DL421 Sensor Module User Manual 

2/04 

 

Figure 1-2   Electronics Module 

 
 

1.3 Operator Interface 

The DirectLine® Sensor operator interface consists of three pushbuttons and one 4-
digit, 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. 
 

Summary of Contents for DirectLine DL421

Page 1: ...Industrial Measurement and Control DirectLine DL421 Sensor Module for Durafet II Durafet III Meredian II and HPW7000 pH Electrodes User Manual 70 82 25 102 Rev 5 2 04 ...

Page 2: ...h 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 operat...

Page 3: ...t 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 t...

Page 4: ...ntegral 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 MAR...

Page 5: ...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 cali...

Page 6: ..._______________________________________ 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 Fi...

Page 7: ...trode 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 internall...

Page 8: ...tronics Module 1 3 Operator Interface The DirectLine Sensor operator interface consists of three pushbuttons and one 4 digit 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 ...

Page 9: ...m 50 Meredian II 3 65m 12 or 6 1m 20 HPW7000 45m 1 5 or 10 97m 36 Power 16 42 Vdc 23mA max Maximum load resistance 250 ohms at 16 Vdc 600 ohms at 24 Vdc 1400 ohms at 42 Vdc Local Display and Buttons LCD 4 digit 7 segment Engineering Units pH degrees F degrees C Calibration Options 1 point Sample or 2 point Sample Auto Buffer Recognition Selections US NIST EURO Solution Temperature Compensation Sel...

Page 10: ... Mounting Connector Dissolved Oxygen e e 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 None 00 _ _ SS Customer ID Tag 3 lines w 22 characters line SS _ _ Certificates None _ _ 00 Calibration Conformance _ _ CC 3 3 No cable or connector required Mounting F Non...

Page 11: ...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 Electronics Module Black Brown Shield Wire Ground Minimum 16 V 250 ohms max Maximum 42 V 1400 ohms max Power Supply _ _ Load Resistance _ Chart Recorder Controller etc Use 250 ohms for 1 5 V signal Cordset 6m 19 7 Blue wire not used Figure 2 1 Cordset...

Page 12: ...sket 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 ...

Page 13: ...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 3 Tighten the locking screw on the bottom rear of the electronics module Electronics Module Locking Screw in Rear of Housing Elect...

Page 14: ...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 plasti...

Page 15: ...erminal 4 Pigtail Shield Lead Terminal 5 NC No Connection Terminal 6 Coax Measuring Electrode Lead Earth Ground Yellow 5 Slide cover along cable and tighten by hand onto the remote connector assembly 6 Slide cap along cable and tighten onto cable jacket with small wrench until cable cannot slide within strain relief rubber bushing 7 Remove yellow protective sleeve from opposite end of connector as...

Page 16: ...trode Coax Shield Terminal 5 Clear Measuring Electrode Coax Lead Terminal 6 No Connection Earth Ground 3 Green White Leads from Measuring Reference and Temperature 5 Slide cover along cables and tighten by hand onto the remote connector assembly 6 Slide cap along cables and tighten onto cable jackets with small wrench until cables cannot slide within strain relief rubber bushing 7 Remove yellow pr...

Page 17: ...l Coax Measuring Electrode Lead and 1 Meg ohm resistor pre installed by Honeywell Compression Cap Strain Relief Cover Protective Vinyl Boot remove Remote Electronics Module for Meredian II Electrodes and HPW7000 Remote Wiring Cable 12 or 20 Feet for MeredianII Electrodes 1 5 or 36 Feet for HPW7000 Electrode Electronics Module 1 2 3 6 5 4 1 2 3 4 5 6 Clear Reference Coax Lead Black Temperature Sens...

Page 18: ...el Terminal Connectors View from End Front View View from End Front View Barriers Repeater Isolators Hose Clamp Slot for Pipe Mounting Metal clip for U DIN rail mounting Gray clip for G DIN rail mounting Mounting Kit Hose Clamp included in kit Through Hole for DIN Rail Mounting Figure 2 5 Remote Mounting Hardware ...

Page 19: ...customer conduit connection Use 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 NPT threads to support the DirectLine during installation ...

Page 20: ...ications 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 ...

Page 21: ...nt Buffer Group Selection Edit Buffer Group MODE Hold Flashing Display You are now in EDIT mode Value of current Buffer Group selection Select desired Buffer Group Momentarily To select US default NIST or Euro Save the Buffer Group MODE Momentarily Selection for group 2 Enter Solution Temperature Coefficient Selection MODE Momentarily COEF for 1 second then Solution Temperature Coefficient Selecti...

Page 22: ...ODE Hold Flashing Display You are now in EDIT mode Value of current 0 selection Select desired 0 pH Value Momentarily Selected 0 pH Value in 0 50 pH increments Range 0 00 to 14 00 pH default 0 00 Save the New 0 Range Value MODE Momentarily New Value 5 100 Range Value Selection Momentarily rnGH for 1 second then value of current 100 Range Value Selection Edit 100 Range Value Selection MODE Hold Fla...

Page 23: ...on Momentarily AdJH Adjust 100 Calibration MODE Hold AdJH flashes You are now in EDIT mode Range 19 60 to 20 40 mA typically default 20 00 mA Momentarily AdJH increments value AdJH decrements value Save 100 Calibration MODE Momentarily AdJH 8 Return to Online Display MODE Momentarily Returns to Online Display ...

Page 24: ...ope 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 theoretic...

Page 25: ...ew 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...

Page 26: ...79 11 66 11 53 11 43 11 32 1 68 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 01 4 00 4 00 4 00 4 00 4 01 4 01 4 02 4 03 4 04 4 06 6 86 6 98 6 95 6 92 6 90 6 88 6 86 6 85 6 84 6 84 6 83 6 83 9 18 9 48 9 40 9 33 9 28 9 23 9 18 9 14 9 10 9 07 9 04 9 01 NIST 12 45 13 42 13 21 13 01 12 80 12 64 12 45 12 30 12 13 11 99 11 84 11 71 EURO 1 0 98 0 98 0 99 0 99 1 00 1 00 1 01 1 01 1 01 1 01...

Page 27: ...tion 1 Hold CAL1 For Sample Manual calibration go to step 2A OR For Auto Buffer Recognition calibration go to step 2B Do Sample Manual Calibration 1 Momentarily SCAL for one second then displays Live Buffer Value Edit Buffer Value or Momentarily To edit Buffer Value Flashing Display 2A Save New Buffer Value MODE Momentarily Buffer Value is saved and goes to Online Display OR 2B Do Auto Buffer Reco...

Page 28: ...o 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 1 Perform a 2 point c...

Page 29: ...0 0 to 110 0 C 14 0 to 230 0 F Zero Offset pH Value Zero Offset pH value expressed with fixed hundredths decimal precision Range 2 00 to 2 00 pH Percent Theoretical Slope Value 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 6...

Page 30: ...2 Display Navigation Procedure Step Operation Press Display 1 View Online pH value MODE Momentarily measured pH 2 View Online Temperature MODE Momentarily measured temperature in C or F Proceed to step 2A or step 3 2A Toggle Online Temperature display units or Momentarily measured temperature in C or F Proceed to step 3 3 Return to home position MODE Momentarily measured pH ...

Page 31: ...the source of the error is removed the error will clear and the output will return to normal operation T HI Measured temperature is 110 C Bring process within limits T LO Measured temperature is 10 C Bring process within limits These errors may occur during probe calibration and abort the calibration process FAIL These error messages are preceded by the message FAIL BFRS The Slope buffer is less t...

Page 32: ...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 0 00 pH Slope 100 0 Online Temperature C Buffer Group Selection US Solution Temperature Coefficient Selection 0 00 pH 10 C Noise Suppression Frequency Selection 60 Hz Output Configuration 0 Range Val...

Page 33: ...00768 002 Remote Electrode Cable Connector Assembly HPW7000 Electrodes Includes O rings and strain relief 51452706 001 Locking screw locks sensor module to electrode or remote connector 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 cou...

Page 34: ...Spare Parts 28 DirectLine DL421 Sensor Module User Manual 2 04 ...

Page 35: ...Spare Parts 2 04 DirectLine DL421 Sensor Module User Manual 29 ...

Page 36: ...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 Connect yellow wire to screw on mounting bracket Carefully remove shrink tubing cover Durafet II only Connect or mount bracket to earth ground Step 1 Step 2 Step 3 Remote cable option Figure 7 1 Wiring for CE Mark Applications ...

Page 37: ...Appendix CE Mark Applications 2 04 DirectLine DL421 Sensor Module User Manual 31 ...

Page 38: ...LY Tel 39 02 92146 1 MEXICO HONEYWELL S A DE CV AV CONSTITUYENTES 900 COL LOMAS ALTAS 11950 MEXICO CITY MEXICO Tel 52 5 259 1966 THE NETHERLANDS HONEYWELL BV Laaderhoogtweg 18 1101 EA AMSTERDAM ZO THE NETHERLANDS Tel 31 20 56 56 911 NORWAY HONEYWELL A S Askerveien 61 PO Box 263 N 1371 ASKER NORWAY Tel 47 66 76 20 00 POLAND HONEYWELL Sp z o o UI Domainewksa 41 02 672 WARSAW POLAND Tel 48 22 606 09 ...

Page 39: ...2 04 DirectLine DL421 Sensor Module User Manual 33 ...

Page 40: ...Industrial Measurement and Control Honeywell 1100 Virginia Drive Fort Washington PA 19034 70 82 25 102 0204 Printed in USA www honeywell com imc ...

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