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Michell Instruments S904, User Manual

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S904 and S904D

Humidity & Temperature Calibrator

User’s Manual

Data Acquisition

Desiccant Charge

Humidity = Yellow

De-Humidify - Green

Heating = Yellow

Cooling = Green

Chamber Set
    Humidity

Chamber Set
Temperature

%rh

°C

Auto  On

On   Auto 

Man. Off

Off   Man.

S-904
Humidity Calibrator

Max.

Min.

4 9 5

2 0 6

97209 Issue 3.1

October 2016

Summary of Contents for S904

Page 1: ...nual Data Acquisition Desiccant Charge Humidity Yellow De Humidify Green Heating Yellow Cooling Green Chamber Set Humidity Chamber Set Temperature rh C Auto On On Auto Man Off Off Man S 904 Humidity Calibrator Max Min 4 9 5 2 0 6 97209 Issue 3 1 October 2016 ...

Page 2: ...information 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 Instrument Tag No Instrument Code Serial Number Invoice Date Location of Instrument Tag No ...

Page 3: ... Ltd and 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 S904 For Michell Instruments contact information please go to www michell com ...

Page 4: ...1 1 Installing Relative Humidity Instruments for Calibration 13 3 2 Start Up 14 3 3 Manual Control of Humidity and Temperature Setting 14 3 4 Typical Response Times for Various Step Changes 14 3 5 Maximum Humidity Levels That can be Generated by the S904 Series 15 3 6 25 pin D sub Connector S904 16 3 7 Automatic Control of Temperature and Humidity Set Points S904 17 3 7 1 25 pin D sub Connector Re...

Page 5: ...emperature Setting Switches 14 Figure 17 25 pin D sub Connector Location 16 Figure 18 25 pin D sub Connector 16 Figure 19 Switches 17 Figure 20 25 pin D sub Connector 18 Figure 21 S904D Wiring Diagram Example 1 19 Figure 22 S904D Wiring Diagram Example 2 20 Tables Table 1 Typical Response Times for Step Changes 14 Appendices Appendix A Technical Specifications 42 Appendix B EU Declaration 44 Appen...

Page 6: ...nufacturer for use with the instrument 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 come into contact with any hazardous substance which might be employed in the construction of the instrument Care should however be exercised during maintenance and the disposal of certain parts Re...

Page 7: ... abbreviations are used in this manual C degrees Celsius F degrees Fahrenheit AC alternating current DC direct current max maximum min minimum percentage RH relative humidity RS232 serial data transmission standard T temperature USB Universal Serial Bus V Volts mA milli Ampere ...

Page 8: ...re repeated in the text in the appropriate locations Where this hazard warning symbol appears in the following sections it is used to indicate areas where potentially hazardous operations need to be carried out DANGER Electric Shock Risk Where this symbol appears in the following sections it is used to indicate areas of potential risk of electric shock ...

Page 9: ...chamber The response time to a humidity or temperature step change is typically less than 10 minutes so a simple 3 point calibration can be carried out in under an hour The S904 Series is easy to maintain The desiccant changes color to indicate when it needs to be recharged and this is visible through a clear window on the front of the unit Recharging the desiccant is simply a matter of heating it...

Page 10: ...The S904D has the Data Acquisition connector on the rear panel and a blanking plate fitted to the front panel as shown in Figure 2 The S904D also features a USB and an RS232 port on the rear panel for communication with the LabVIEW application software Front Panel Data Acquisition Figure 1 S904 Figure 2 S904D ...

Page 11: ...door 2 Water reservoir 3 Desiccant cell and indicator window 4 Relative humidity set point RH 5 A Manual Auto switches for relative humidity temperature control MAN Setpoint is set by switch 4 humidity and switch 6 temperature AUTO Remote control of relative humidity temperature set points see Section 3 7 B ON OFF switches for relative humidity temperature control 6 Temperature setpoint C 7 Humidi...

Page 12: ...h and power input fuse Accessories The S904 humidity and temperature generator is delivered with the following standard accessories Bottle of distilled water Desiccant cell filled with silica gel HT961T00 control probe Chamber door according to customer specification IEC mains cable Calibration certificate for internal reference probe Certificate of conformity graph User s Manual ...

Page 13: ...or 2 Water reservoir 3 Desiccant cell and indicator window 4 Relative humidity set point RH 5 A Manual Auto switches for relative humidity temperature control MAN Setpoint is set by switch 4 humidity and switch 6 temperature AUTO Remote control of relative humidity temperature set points see Section 3 7 B ON OFF switches for relative humidity temperature control 6 Temperature setpoint C 7 Humidity...

Page 14: ...n connector 4 USB connection 5 RS232 connection Accessories The S904D humidity and temperature generator is delivered with the following standard accessories Bottle of distilled water Desiccant cell filled with silica gel HT961T00 control probe Chamber door according to customer specification IEC mains cable Calibration certificate for internal reference probe Certificate of conformity graph User ...

Page 15: ...ure that any water in the reservoir is drained and the relative humidity control probe in the chamber is removed The S904 Series should NOT be moved while in operation 2 1 Installing the Relative Humidity and Temperature Control Probe The HT961T00 Relative Humidity and Temperature Control Probe is supplied as an accessory with the S904 Series This control probe is removed during transportation To ...

Page 16: ...4D User s Manual 8 97209 Issue 3 1 October 2016 INSTALLATION GND OUTPUT TEMP SUPPLY 8 35 VDC OUTPUT RH BOTTOM VIEW TOP VIEW Control Probe Connector Figure 8 Location of Control Probe Inside the Climate Chamber ...

Page 17: ...mineralized water Figure 9 Filling the Water Reservoir Use the bottle supplied to fill the water reservoir 1 Remove the red plastic cap from the top of the reservoir 2 Carefully fill with clean distilled water to a level between the two indicator lines 3 Replace the red cap on the water reservoir after filling Do NOT fill above the MAX indicated line as this may cause liquid to enter the humidity ...

Page 18: ...1 Remove the red caps from the bottom and top of the water reservoir 2 Drain the water into a suitable container 3 Tilt the instrument to empty the reservoir completely 4 Re fit the red cap after emptying Figure 10 Emptying the Water Reservoir It is essential to drain the water reservoir before transporting or when the system is not going to be used for a few weeks Do not re use any of the drained...

Page 19: ...come transparent or pink this is an indication that the instrument s ability to generate low humidity is reduced It is recommended that the silica gel is replaced or regenerated at this time The desiccant can be regenerated by emptying it completely from the desiccant chamber and drying it in an oven for approximately 3 hours at a temperature of 130 C 266 F After drying it in an oven allow the des...

Page 20: ...red to operate the unit The power supply connection is a 3 pin IEC plug located on the rear panel of the instrument The ON OFF switch and the power input fuse are in the same location adjacent to the power socket A 3 core power cable is provided DANGER Electric Shock Risk The instrument must be connected to an electrical earth for safety purposes ...

Page 21: ...ng used should be covered with a blind stop to exclude temperature and relative humidity influences from outside the chamber NOTE If a door without ports A000268 is used the probes to be tested must be placed inside the measurement chamber To ensure good air flow do not overfill the chamber with probes The port adapters can be changed using a port adapter removal tool A000265 available from Michel...

Page 22: ... readings Chamber Set Humidity Chamber Set Temperature Auto On On Auto Man Off Off Man 2 4 5 4 5 0 Figure 16 Humidity and Temperature Setting Switches 3 4 Typical Response Times for Various Step Changes Typical response times for various step changes are shown in Table 1 below T100 represents the total time taken to reach stability at the new setpoint T63 and T95 values represent the time taken to...

Page 23: ...ump to switch off in order to save energy If only temperature calibration is needed humidity generation can be switched off NOTE In this instance the pump will also stop The minimum chamber temperature that can be reached is about 10 C 18 F below ambient temperature The maximum chamber temperature is limited to about 52 C 125 F 3 5 Maximum Humidity Levels That can be Generated by the S904 Series 1...

Page 24: ...ront panel only Control probe output Temperature 0 to 100 C 0 to 10 V fixed output 22 Front panel only Control probe output RH 0 100 RH 0 to 10 V fixed output 24 Front panel only External set point control enable input 0 V DC Not connected Manual control 5 V DC Enable external set point control 10 Front panel only Temperature setpoint control input 0 to 10 V 0 to 100 C 23 Front panel only RH setpo...

Page 25: ... to be controlled using a voltage input Chamber Set Humidity Chamber Set Temperature Auto On On Auto Man Off Off Man 2 4 5 4 5 0 Figure 19 Switches 1 Put the MAN AUTO switches into the AUTO position 2 Put the ON OFF switches into the ON position 3 Connect 5 V to pin 24 with respect to ground pin 21 to enable external control of the set points The unit is now ready to accept external inputs Externa...

Page 26: ... RH 0 to 10 V fixed output 24 Front panel only External set point control enable input 0 V DC Not connected Manual control 5 V DC Enable external set point control 8 Channel 3 20 Channel 4 7 Channel 5 19 Channel 6 6 Channel 7 18 Channel 8 25 14 5 V supply 21 Ground 10 11 12 13 23 24 Reserved Do not use Free Unused These pins are wired from the 25 pin connector inside the chamber to straight throug...

Page 27: ...ying a current or voltage to the Reserved PINS may cause permanent irreversible damage to the S904D electronics 3 7 2 S904D Example Wiring Diagrams The following diagram shows how to connect three RH probes using the 25 pin D sub connector inside the chamber and powering the probes using the internal S904D power supply while logging their RH and temperature outputs 1 2 3 4 5 6 7 8 9 10 11 12 13 25...

Page 28: ...INPUT OUTPUT OUT RH OUT T GND V OUT RH OUT T GND V OUT RH OUT T GND V Figure 22 S904D Wiring Diagram Example 2 S904D Data Acquisition Resolution The data acquisition is made for 0 to 10 V input The AD converter analog to digital is 12 bit data acquisition so there are 4096 steps If a device is connected with a 0 to 5 V output the resolution goes down to 2048 steps and for an instrument with a 0 to...

Page 29: ...to install the S904D software 4 1 Connecting and Starting the S904D Software Connect the S904D to the computer by using the USB cable or through the RS232 port Start the LabVIEW software by clicking on S904D Control exe standard location C Program Files Michell Instruments S904D Control Program Select the used com Port and click on Connect ...

Page 30: ... October 2016 APPLICATION SOFTWARE Click on OK to confirm Once the connection is established the green interface light will come on 4 2 LabVIEW Software Menu Structure This section covers the navigation of the LabVIEW software 4 2 1 Command File ...

Page 31: ...eader containing the name date and page number can be added to the file for printing The print margins can also be changed Print Window If required for reporting purposes a screen shot can be printed by clicking on Print Window Exit To close the program click on Exit 4 2 2 Command Settings ...

Page 32: ...ettings Save Control Settings All setpoint settings can be saved by clicking on Save Control Settings The file can then be saved under a unique name Reset Control Settings By clicking on Reset Control Settings the connection with the control sensor in the calibration chamber will be disconnected All setpoint settings will be then be set back to factory settings 4 2 3 Command Tools ...

Page 33: ...ents 25 APPLICATION SOFTWARE Logging During the different conditions generated in the chamber all data can be saved to the log file A maximum of 6 channels can be logged plus the internal reference probe with temperature and relative humidity ...

Page 34: ...ate from the PC where the log file is saved to will be used Time stamp The time from the PC where the log file is saved to will be used Setpoints The temperature and humidity setpoint chosen by the user in LabVIEW Step A total of 32 setpoint steps can be chosen All steps are numbered from 1 to 32 The actual step number setpoint can also be logged here Select Deselect All Date stamp Time stamp Set ...

Page 35: ...E Channels 1 and 2 are dedicated channels and cannot be changed Save Log Settings All log settings can be saved by clicking on Save Log Settings The file can then be saved under a unique name Retrieve Control Settings To load a previously saved log settings file click on Retrieve Log Settings Log interval Click on Log interval a new window appears Select the logging frequency ...

Page 36: ...button will now be enabled Log to File Type the name for the log file The name and path will be visible at the bottom of the log settings window Accept and return to main program Use this button to leave the log settings menu and return to the main program To accept all new settings click on OK ...

Page 37: ...truments 29 APPLICATION SOFTWARE The green Log file light will come on Monitor Ones the program is running it is possible to open a new window Process Monitor This window will display the status of humidity temperature setpoints and time ...

Page 38: ... This option opens a new window showing the logged data in a graph 4 2 4 Command Help About Click on About to find the software version number USB Interface driver Click on the USB Interface driver to install the CP210x USB to UART Bridge Driver see S904D Controller Installation Guide ...

Page 39: ...ws or type the desired set point value for temperature and or humidity in the corresponding box Temperature range 0 0 to 75 0 C Humidity range 0 0 to 99 5 RH Slope Slope determines how fast the S904D will go from one setpoint to another setpoint Use the up and down arrows or type the desired value for the slope of temperature and or humidity in the corresponding box Slope Temperature range 0 0 to ...

Page 40: ...lso true when a certain setpoint is not achieved The program could otherwise be stalled by one extreme setpoint When the duration setpoint is set to 0 the LabVIEW software will automatically go to the next setpoint The value that is selected is directly related to an hour For example if the time chosen is 0 9 this is calculated as 0 9 x 60 minutes 54 minutes See below for a quick reference chart T...

Page 41: ...S904 S904D User s Manual Michell Instruments 33 APPLICATION SOFTWARE Progress A green light will show the actual setpoint Start Press the start button to start the program and or logging ...

Page 42: ...Issue 3 1 October 2016 APPLICATION SOFTWARE Click on OK to start the process The process starts and the green light will come on The program runs all setpoints sequentially After the last setpoint the program stops Click on OK to finish ...

Page 43: ...S904 S904D User s Manual Michell Instruments 35 APPLICATION SOFTWARE Log file The log file is a comma separated file When it is loaded into Excel it will look like this Actual Values ...

Page 44: ...ime to end The time elapsed so far and the estimated time to the end of all steps Step The actual step maximum of 32 that the software is in Progress A bar showing the progress of the steps S904 to default after completion Normally when the S904D Control program is finished the logging stops and the last setpoints remain active until the S904D is switched off If for example the last setpoint was 1...

Page 45: ...es will not be logged This additional setpoint remains active until the S904D is switched off The orange light will come on Example of a test program 1 stabilize the chamber for 30 minutes at 20 C and 50 RH assuming the S904D starts at ambient temperature and humidity 20 C 50 RH 2 go in 1 hour to 30 C and 20 RH and stabilize for 1 5 hours 3 go in 1 hour to 40 C and 20 RH and stabilize for 2 hours ...

Page 46: ... hour delta T 10 C slope 10 C hr Set slope for humidity to 30 0 no Ramp time for humidity use standard slope Set duration time to 3 0 hour 1 hour Ramp time 2 hours stabilize time 4 Set temperature setpoint to 48 0 C set humidity setpoint to 60 RH Set slope for temperature to 16 0 Ramp time 0 5 hour delta T 8 C slope 16 C hr Set slope for humidity to 80 0 Ramp time 0 5 hour delta RH 40 RH slope 80 ...

Page 47: ...S904 S904D User s Manual Michell Instruments 39 APPLICATION SOFTWARE ...

Page 48: ... the chamber No humidifying Water level too low No drying and humidifying Switch 1 is off see below No heating or cooling Switch 2 is off see below No display Fuse on back panel No external control Front panel switches set to AUTO Pin 24 of the front connector must be 5V Chamber Set Humidity Chamber Set Temperature Auto On On Auto Man Off Off Man 2 4 5 4 5 0 Switch 1 Switch 2 ...

Page 49: ...S904 S904D User s Manual Michell Instruments 41 APPENDIX A Appendix A Technical Specifications ...

Page 50: ...ate From 20 to 40 C 68 to 104 F 40 to 20 C 104 to 68 F 1 5 C minute 2 7 F minute 0 7 C minute 1 2 F minute Control element Removable relative humidity sensor General Probe Ports up to 5 sensor body diameters 5 25mm 0 2 0 98 accommodated by port adapters Chamber Volume 2000cm3 122 1in3 Chamber Dimensions 105 x 105 x 160mm 4 13 x 4 13 x 6 3 w x h x d Instrument Dimensions 520 x 290 x 420mm 20 5 x 11...

Page 51: ...S904 S904D User s Manual Michell Instruments 43 APPENDIX B Appendix B EU Declaration ...

Page 52: ...rective Low Voltage Directive LVD 2011 65 EU Restriction of Hazardous Substances Directive RoHS2 and has been designed to be in conformance with the relevant sections of the following standards or other normative documents EN61326 1 1997 A1 1998 A2 2001 Electrical equipment for measurement control and laboratory use EMC requirements Class B emissions and Industrial Locations immunity EN61010 1 201...

Page 53: ...S904 S904D User s Manual Michell Instruments 45 APPENDIX C Appendix C Quality Recycling Warranty Information ...

Page 54: ...s which may be harmful to the environment Similarly we are increasingly using recyclable and or recycled material in our business and products wherever it is practical to do so To protect natural resources and to promote material reuse please separate batteries from other types of waste and recycle responsibly If batteries are not properly disposed of these substances can cause harm to human healt...

Page 55: ...rective 2011 65 EU Article 3 24 defines Control and Monitoring Equipment specifically as monitoring and control instruments designed exclusively for industrial or professional use RoHS2 EU Directive 2011 65 EU states the closing date for compliance of any Control and Monitoring Equipment product sold into the EU market place as 22nd July 2017 However the careful design policy of all Michell Instru...

Page 56: ...es of our manufacturing In the unlikely event that any chemicals of concern appear in our products in quantities greater than 0 1 of total mass per product we will immediately inform you by correspondence according to the REACH Article 33 requirements Our current appraisal is however that we do not expect or foresee such an incidence January 2013 C 7 Return Policy If a Michell Instruments product ...

Page 57: ...nts for North America This device complies with part 15 of the FCC Rules Operation is subject to the following two conditions 1 This device may not cause harmful interference 2 This device must accept any interference including interference that may cause undesired operation This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to part 15 of the F...

Page 58: ...S904 S904D User s Manual 50 97209 Issue 3 1 October 2016 APPENDIX D Appendix D Return Document Decontamination Declaration ...

Page 59: ...micals 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 Your method of cleaning decontamination Has the equipment been cleaned and decontaminated YES NOT NECESSARY Michell Instruments will not accept instruments that have been exposed to toxins radio activity o...

Page 60: ...http www michell com ...

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