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Easidew DryCheck User’s Manual

14

 

 

 

97108 Issue 13, July 2017

OPERATION

3.4 

Operating Temperature / ppm

V

 Range 

3.4.1  Temperature Range Default

The default temperature unit for the Easidew DryCheck is in degrees Celsius. This is 

indicated by the °Cdp LED indicator. The default settings associated with this temperature 

scale are as follows:

• 

Span -100 to +20°Cdp

• 

Lower and upper span limits -100 and +20 (display flashes outside this 

range)

• 

Minimum alarm set-point -100°Cdp

• 

Maximum alarm set-point +20°Cdp

To range the instrument for °F, all the above parameters need 

to be changed to their Fahrenheit equivalent values (-148 and 

+68°F). It is not sufficient just to change the °F/°C units. 

To change the range to Fahrenheit follow the procedures in Section 3.4.2.

Содержание Easidew DryCheck

Страница 1: ...Easidew DryCheck OnLine Dew Point Hygrometer User s Manual 97108 Issue 13 July 2017...

Страница 2: ...nformation when contacting Michell Instruments for service purposes Instrument Code Serial Number Invoice Date Location of Instrument Tag No Instrument Code Serial Number Invoice Date Location of Inst...

Страница 3: ...d may not be copied or otherwise reproduced communicated in any way to third parties nor stored in any Data Processing System without the express written authorization of Michell Instruments Ltd For M...

Страница 4: ...Operation 9 3 2 1 First Time Operation 9 3 3 System Alarms 10 3 3 1 Alarm Switching Logic Default 10 3 3 2 Reversal of Alarm Switching Logic 10 3 3 3 Alarm Level Set Up 12 3 3 4 Re Transmitted Output...

Страница 5: ...and Unit Settings 15 Figure 12 Set up Alarm Set Point Limits 16 Figure 13 Set up Monitor to read ppmV 18 Figure 14 Set up Data Communications Parameters 20 Figure 15 Sensor Removal 23 Figure 16 Inspe...

Страница 6: ...rking pressure is 10 barg 145 psig Toxic Materials The use of hazardous materials in the construction of this instrument has been minimized During normal operation it is not possible for the user to c...

Страница 7: ...ew point Hz Hertz mA milliampere Nl min normal liters per minute psig pound s per square inch gauge V volts VA volt ampere Warnings The following general warnings listed below are applicable to this i...

Страница 8: ...100 to 20 Cdp 148 to 4 Fdp 60 to 60 Cdp 76 to 140 Fdp 50 to 50 Cdp 58 to 122 Fdp The Easidew DryCheck is protected within an IP65 rated wall mounted enclosure with a hinged lid The lid allows access...

Страница 9: ...fully see Figure 2 1 Remove the accessories box 4 2 Lift out the instrument 2 together with its end packing pieces 1 and 3 3 Remove the end packing pieces and set the instrument down at the site of in...

Страница 10: ...Needle Valve Flowmeter Figure 3 Gas Flow Diagram NOTE The DryCheck is designed to measure dew point at standard instrument air pressure or 7 barg A barometric version is available on request please c...

Страница 11: ...re marked ALr1 low and ALr2 high Access to the alarm relay contacts is provided on the rear panel The connection for the ALr2 contact is shown in Section 2 8 NOTE Every monitor is factory fitted with...

Страница 12: ...ErrH error high and temperature reading for high temperature over range 4 ALr1 Output Only available directly from the back of the Monitor panel 5 ALr2 When illuminated this LED indicates that the dew...

Страница 13: ...ext this key is used to access the set value of the selected process field and as an Accept key for new parameter values Table 2 Function Keys 2 6 Mounting The instrument is designed for wall or panel...

Страница 14: ...nal Connections 1 2 3 4 5 6 Normally Closed Normally Open COM Not used mA mA Figure 5 Alarm and Communications The signal outputs will be connected to external systems that can potentially influence t...

Страница 15: ...4 Red Transmitter loop supply ve 24 V DC w r t terminal 1 7 User defined ALr2 normally closed 9 7 8 8 User defined ALr2 normally open 9 User defined ALr2 common 13 User defined Current loop out ve De...

Страница 16: ...oses to re range the transmitter or if ppmV is selected The instrument must also have been installed as detailed in Section 2 and connected to a sample gas supply that is representative of the process...

Страница 17: ...point temperature as a steady reading within the range 100 to 20 Cdp 148 to 68 Fdp 60 to 60 Cdp 76 to 140 Fdp 50 to 50 Cdp 58 to 122 Fdp or 0 to 3000 ppmV depending upon how the instrument has been s...

Страница 18: ...ions Alarm 2 Temp 40 Alarm 2 ON Temp 40 Alarm 2 OFF Section 3 3 2 describes the method for reversing the default switching logic and Section 3 3 3 describes the method for setting up individual alarm...

Страница 19: ...Easidew DryCheck User s Manual Michell Instruments 11 OPERATION P SET x3 P P SET SET x2 Main Display Main Display Figure 8 Change Alarm Switching Logic...

Страница 20: ...s follows to exit to the Main Display without saving any new settings press the P key Figure 9 shows the operational key sequence To set up the alarm set point 1 Press the SET key twice 2 Press the ke...

Страница 21: ...ws the operational key sequence Change output from 4 20 mA to 0 20 mA 1 Press the P key once the display will read tECH 2 Press the SET key and the display will flash between ConF and PinP 3 Press the...

Страница 22: ...settings associated with this temperature scale are as follows Span 100 to 20 Cdp Lower and upper span limits 100 and 20 display flashes outside this range Minimum alarm set point 100 Cdp Maximum ala...

Страница 23: ...display will flash the current maximum span limit 020 0 6 Use the or keys to set the required equivalent Fahrenheit value 068 0 and press the SET key twice unit is then displayed 7 Press the key the d...

Страница 24: ...ess the key four times and the display will flash between ConF and GEnn 4 Press the SET key once the display will read SU L 5 Press the key once to display a flashing 4 digit number representing the c...

Страница 25: ...he current maximum span limit 0200 8 Use the and keys to set the required ppmV maximum reading 3000 and press the SET key twice unit is then displayed 9 Press the key the display will flash the curren...

Страница 26: ...Set Span max 3000 ppm v x2 x3 SET SET P Main Display ppm v Main Display e g C Set alarm lower range limit e g zero Set alarm upper range limit e g 3000 ppm v x2 x2 Figure 13 Set up Monitor to read pp...

Страница 27: ...o accept the new value Set baud rate 7 bAud will now be displayed Press the key once to display a flashing 4 digit number The default setting is 0003 representing 9600 baud 8 Use the and keys to give...

Страница 28: ...Main display SET Set baud Set Address 0 1200 1 2400 2 4800 3 9600 4 19200 SET SET Set Parity Set number of stop bits 0000 1 stop bit 0001 2 stop bits 0000 None 0001 Odd 0002 Even SET SET Main Display...

Страница 29: ...0xCA Send this to the instrument with the correct delays between characters Baud Rate bps Min Delay ms Max Delay ms 1200 9 17 13 76 2400 4 59 6 88 4800 2 30 3 44 9600 1 15 1 72 19200 0 57 0 86 After a...

Страница 30: ...n on the output side of the sample block In applications where the test gas has a very high flow rate an instrument by pass arrangement is preferable to flow restriction after the transmitter Flow Rat...

Страница 31: ...ation and exchange sensor schemes to suit specific needs A Michell representative can provide detailed custom advice for Michell Instruments contact information go to www michell com 5 3 Transmitter M...

Страница 32: ...ent should be changed when the flow falls below an acceptable level or the pressure drop becomes too high In any case the element should be replaced before the pressure drop across it reaches 0 7 barg...

Страница 33: ...ilure Refer to Michell or local representative for repair Sbr Sensor failure or break in sensor connection Check transmitter cable for continuity damage Rectify replace cable ErrH Gas is wetter than 2...

Страница 34: ...Easidew DryCheck User s Manual 26 97108 Issue 13 July 2017 APPENDIX A Appendix A Technical Specifications...

Страница 35: ...D Ingress Protection IP65 NEMA 4x Mains Cable 2m cable supplied Filtration 99 5 removal of 0 3 m Gas Connection Quick connect fittings for 6mm OD Teflon pipe 60 to 60 Cdp 50 to 50 Cdp Electrical Speci...

Страница 36: ...Easidew DryCheck User s Manual 28 97108 Issue 13 July 2017 APPENDIX B Appendix B System Drawing...

Страница 37: ...Easidew DryCheck User s Manual Michell Instruments 29 APPENDIX B Appendix B System Drawing Figure 17 System Drawings...

Страница 38: ...Easidew DryCheck User s Manual 30 97108 Issue 13 July 2017 APPENDIX C Appendix C Quality Recycling Warranty Information...

Страница 39: ...irectives Full information can be found on our website at www michell com compliance This page contains information on the following directives ATEX Directive Calibration Facilities Conflict Minerals...

Страница 40: ...Easidew DryCheck User s Manual 32 97108 Issue 13 July 2017 APPENDIX D Appendix D Return Document Decontamination Declaration...

Страница 41: ...hemicals YES NO Radioactive substances YES NO Other hazards YES NO Please provide details of any hazardous materials used with this equipment as indicated above use continuation sheet if necessary You...

Страница 42: ......

Страница 43: ...http www michell com...

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