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Table of Contents
Related Manuals for Shaw SDHmini Series
Summary of Contents for Shaw SDHmini Series
- Page 1 Model SDHmini Dewpoint Meter Instruction Manual SDHmini User Manual - Iss 1...
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Page 3: Table Of Contents
Index Unpacking Your Shaw Moisture Meters SDHmini........4 General Description..................4 Ranges......................5 Symbols Table....................6 Lithium-ion Cell - Battery................6 Pressure Exposure..................6 Installing the Air/Gas Sampling System............7 Gases to Avoid....................7 Piping Installation Schematic............... 8 Piping Schematic Component Index............9 Purging the Sample Connection.............. -
Page 4: Unpacking Your Shaw Moisture Meters Sdhmini
1.0 Unpacking Your Shaw Moisture Meters SDHmini Please examine the SDHmini package for any damage or mishandling. If any damage is evident please notify the carrier and the Shaw Moisture Meters representative from where this unit was purchased. You should have received (if ordered): ●... -
Page 5: Ranges
The GUI features three main viewing screens, digital, graphical (historical readings in a scrolling strip chart) and a meter (a traditional moving coil). There is also a secondary display in the top right which allows display of readings in alternative units of measurement. -
Page 6: Symbols Table
2.0 Symbols Table Battery Note: Please refer to section 2.1 Rating of instrument is less than 1 W in operation. Charging voltage is 5 V nominal. Charging input is however additionally protected to Um 250 Vrms. The symbol indicates that the device contains a battery which may be charged via the neighbouring connector. -
Page 7: Installing The Air/Gas Sampling System
3.0 Installing the Air/Gas Sampling System The Piping Installation Schematic diagram (see section 3.2) shows all components, which could be used in a dry gas measurement application. Although not all the items shown will be required for every installation. The SDHmini should be placed on a stable surface prior to connecting to the sample pipework. -
Page 8: Piping Installation Schematic
3.2 Piping Installation Schematic... -
Page 9: Piping Schematic Component Index
3.3 Piping Schematic Component Index Sample Isolation Valve - This is a recommended item as it allows access to the sample system without interrupting the main process line. Sample Tube – This should be stainless steel for dry air or gas applications but copper or carbon steel can be used where wetter gases are to be measured. -
Page 10: Sampling Information
reading. The flow should not be so high that the gas velocity could physically damage the sensor or cause back-pressure in the sensor head, so should not exceed approximately 10 litres/min. Allow this purge to continue for two minutes to remove any residual moisture from the sample pipe work and components. -
Page 11: Normal Operations
5.0 Normal Operations 5.1 Powering On/Off On power up, the SDHmini briefly displays a splash screen showing instrument status, error information and firmware version number. To turn off the SDHmini press and hold for five seconds. 5.2 Graphical Viewing Options The start up screen is soon replaced by the normal measurement mode screen (see below) displaying the current moisture measurement in a variety of views. -
Page 12: Display Options
5.3 Display Options The display can be changed by pressing the following keys to cycle through all of the graphical views. Here is a view starting as a digital number followed by simulated strip chart and moving coil instruments. The digital display mode has the benefit of showing the moisture measurement in main choice of engineering units but also a secondary display with perhaps alternative engineering units. -
Page 13: Calibration
Use the key to move to the desired measurement type and press to select it. Pressing will exit the current screen without making any further changes. Here the secondary display is being changed to ppm(v) engineering units. Please note: when you change the display to either the moving coil meter or the strip chart the secondary engineering units display is... -
Page 14: Auto Calibration (Autocal)
6.2 Auto Calibration (AutoCal) The AutoCal facility uses the fact that each sensor is designed and manufactured to give no further increase in response when it reaches its maximum moisture level. For example a SDHmini with a full scale value of 0 °C dewpoint will read 0 °C dewpoint when exposed to a gas with this moisture concentration and will continue to read 0 °C dewpoint as the moisture concentration rises above 0 °C dewpoint. -
Page 15: Calset
Close the desiccant head when instructed to do so and press during the AutoCal aborts the process. Pressing The value present at the start of the aborted AutoCal process is reinserted. The SDHmini will return the instrument to normal measurement mode. Note: Avoid carrying out the AutoCal procedure on a SDHmini with a full scale value of 0 °C dewpoint on days when the ambient may be below this value, for example a dry day when the ambient temperature is below... -
Page 16: Calibration Notes
The SDHmini will display a moving bar until it assesses that the sensor has stabilised (up to 10 minutes). The full scale value, -10 °C dewpoint, is now displayed. Press when complete. Close the desiccant head when instructed to do so and press during CalSet aborts the Pressing... -
Page 17: Additional Information
7.0 Additional Information 7.1 Additional Sensor Settings On the configuration screens there exists a collection of measurement settings associated with the sensors and its environment. 7.2 Sensor Type Here you may view the type of sensor installed in the SDHmini and its range. If you receive another sensor type (colour) then you may perform a field change of the sensor range as shown in the following. -
Page 18: Selecting Gas Molecular Weights
7.4 Selecting Gas Molecular Weights 8.0 Pressure This sub-menu has, for both the primary and secondary displays, five options allowing the user to select either atmospheric pressure or one of four pressure engineering units and applied pressure. When this function is selected, the main and secondary display screens will display the pressure at which the dewpoint reading is calculated. -
Page 19: Non Measurement Related Configuration Functions
9.0 Non Measurement Related Configuration Functions 9.1 Changing the Date In order to change the present date press the arrow key to select the Date function from the Configuration menu. Press to change the date. Here for example the date is changing from 06/03/15 to 06/04/15. Press to enter new date or to abort changes. -
Page 20: Changing International Settings
9.3 Changing International Settings In order to change the settings for Language, Date Format and Numerical Delimiter, use the selection cursor Select International Settings from the Configuration Menu. To change the Language option select The language choice area is highlighted. A flag of a country most associated with one of the pre-installed languages indicates which language is currently selected. -
Page 21: Hotkeys
10.0 Hotkeys To access the hotkeys from the main screen, press key 5 on the keypad. The four soft keys are replaced by a new set of hotkeys for a short while. These are available for rapid access to certain areas of the menu structures or functions. - Page 22 If more than one device is found, (as per example image shown) select the device you wish to pair with using and press to begin the pairing process. Enter the pairing authorisation code for the device and press to connect. The message will say Connecting and finally Connected.
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Page 23: Desiccant And Head Seal Replacement
12.0 Desiccant and Head Seal Replacement ● Unscrew the four handle retaining screws using a hex socket drive. ● Unscrew the four posidrive countersunk screws which hold the retaining ring to the SDHmini. ● The desiccant filled desiccant chamber can now be removed from the sample chamber by fully retracting the desiccant chamber. -
Page 24: Temperature
This is the reason that the Shaw SDHmini is so successful. The sensor is kept in a dry condition when it is not in use and therefore results are obtained in the quickest possible time. -
Page 25: Problem Guide
components – including the water vapour. Water Vapour Pressure varies in direct proportion to the total gas. Dewpoint Temperature The temperature to which the gas must be cooled in order that it should be saturated with water vapour (i.e. 100% relative humidity). For practical reasons it is referred to water above 0 °C and ice below 0 °C. -
Page 26: Sdhmini Specifications
-80 °C dewpoint to -20 °C dewpoint Grey (G): -80 °C dewpoint to 0 °C dewpoint Blue (BL): -80 °C dewpoint to +20 °C dewpoint Silver (S): -100 °C dewpoint to -20 °C dewpoint Sensor: Operating Principle: Shaw Ultra High Capacitance Aluminium Oxides Sensor... -
Page 27: Sdhmini General Assembly Diagram
19.0 SDHmini General Assembly Diagram... - Page 28 SDHmini User Manual - Iss 1 © SHAW MOISTURE METERS UK (LTD) 2016 Shaw Moisture Meters (UK) Ltd. Len Shaw Building Bolton Lane Bradford BD2 1AF England t. +44 (0)1274 733582 f. +44 (0)1274 370151 e. mail@shawmeters.com www.shawmeters.com...