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Grimm Mini-LAS 11-R Manual

Portable laser aerosol spectrometer
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Portable Laser Aerosol Spectrometer
Model Mini-LAS 11-R

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Summary of Contents for Grimm Mini-LAS 11-R

  • Page 1 Portable Laser Aerosol Spectrometer Model Mini-LAS 11-R...
  • Page 2 Model 11-R Address: GRIMM Aerosol Technik GmbH & Co. KG Dorfstraße 9 83404 Ainring GERMANY Internet: www.grimm-aerosol.com E-Mail: info@grimm-aerosol.com Telephone: +49 8654-578-0 Fax: +49 8654-578-35 Registration office Traunstein, German Commercial Register (HRB) 4803 Manager: Dr.-Ing. Hans-Jürgen GRIMM GRIMM AEROSOL TECHNIK GmbH & Co.KG...

  • Page 3: Table Of Contents

    1.5.2 Information about direct/remote control ................. 14 1.5.3 Notes on starting/stopping measurements ................14 1.5.4 Self-test of the Mini-LAS 11-R ....................14 1.5.5 Restrictions on use and fields of application ................14 1.5.6 Ambient conditions ......................... 14 Transportation ........................15 Storage ...........................
  • Page 4 Model 11-R, version 12.40, particle number measuring mode (counts) ........ 60 5.1.7 Model 11-R version 12.40 measuring mode channel masses in µg/m³ ......... 60 GRIMM Windows 1178 software incl. Installation of the software: ........61 Troubleshooting (display messages and status indicators) ........... 65 Maintenance and cleaning ............66 Maintenance and cleaning by the customer ................
  • Page 5 Installation of the duct probe 1152 ..................80 Zero filter (model 1148) ......................81 Temperature and relative humidity sensor (model 1158-EE) ..........81 Temperature, humidity and air speed sensor (model 1154) ..........82 GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 5 von 83...
  • Page 6 Figure 1-1: Safely labelling in and on the Mini-LAS 11-R ................ 12 Figure 2-1: Control elements on the cover, front and right side panel of the Mini-LAS 11-R ....17 Figure 2-2: Control-elements on the left side of the Mini-LAS 11-R ............18 Figure 2-3: Control elements and labelling on the underside of the Mini-LAS 11-R ........
  • Page 7 Figure 6-5: Inserting the new filter ......................68 Figure 7-1: Pneumatics schematic of the Mini-LAS 11-R ................ 72 Figure 7-2: Required and recommended accessories for the Mini-LAS 11-R ......... 75 Figure 7-3 Suction head ........................... 77 Figure 7-4: Suction head storage ......................77 Figure 7-5: Removing the suction head ....................

  • Page 8: Instructions For Safe Operation

    Therefore, it is not liable for damages caused directly or indirectly due to the use of this information, the hardware or the software. Furthermore, GRIMM Aerosol Technik is not responsible for damages due to the abuse of patent rights or third-party rights.

  • Page 9: Warranty

    Should the device fail during the 1-year warranty period or fail to meet the requirements, the company GRIMM Aerosol Technik has the right to replace defective parts or the device; operating errors are ex- cepted. The company GRIMM Aerosol Technik shall perform repairs free of charge at the factory. Only transportation costs and the resulting incidental costs are borne by the customer.

  • Page 10: Explanation Of Symbols

    This symbol points out useful tips that can simplify and optimise your work. This symbol points out specific hazards that can lead to malfunctions or even damage to the hardware, and describes how these can be avoided. GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 10 von 83...

  • Page 11: Fundamental Safety Instructions

    The wait time until resuming operation can be reduced by drying in a heating cabinet. GRIMM Aerosol Technik recommends an acclimatisation time of approximately 8 hours at approximately 20°C and 40-45% relative humidity.

  • Page 12: Laser Safety

    When exposed to high levels of electrostatic charges, the Mini-LAS restarts. When operating the Mini-LAS, please take note of possible electrostatic sources and do not operate the Mini-LAS in their vicinity. Special ESD-safe clothing is not required to operate the Mini-LAS 11-R. GRIMM AEROSOL TECHNIK GmbH & Co.KG...

  • Page 13: Declaration Of Conformity

    Model 11-R 1.4.5 Declaration of conformity GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 13 von 83...

  • Page 14: Intended Use And Fields Of Application

    In case of doubt or questions about the use of the Mini-LAS 11-R, contact the dealer or sales repre- sentative of GRIMM Aerosol Technik GmbH & Co. KG nearest you.

  • Page 15: Transportation

    Figure 1 1: Sunlight warning You will find this label on the underside of the Mini-LAS 11-R. It advises you not to expose the measur- ing device itself or the Mini-LAS 11-R in the transport case to direct sunlight or high temperatures. Oth- erwise device damage or failure may result.

  • Page 16: Disposal

    1.8.2 Disposal of consumables PTFE filters for the Mini-LAS 11-R are considered consumables. These PTFE filters, provided the dust they were exposed to is free of contaminants, are disposed of in household or commercial waste. If substances that are hazardous to health were knowingly or presumably collected with the dust in the PTFE filter, the PTFE filter must be handled according to the respective contaminants.

  • Page 17: Device Description

    Device description Only put the device into operation after reading this manual! Connections on the Mini-LAS 11-R The section that follows explains the various control elements of your dust monitor. In operating the device, one differentiates between standby mode and operating mode. All settings can be read and changed.

  • Page 18: Figure 2-2: Control-Elements On The Left Side Of The Mini-Las 11-R

    Model 11-R 14 15 Figure 2-2: Control-elements on the left side of the Mini-LAS 11-R Bluetooth antenna Connection for GPS antenna Aerosol output LAN connection USB-B connection USB-A connection GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 18 von 83...

  • Page 19: Filter Chamber And Certifications On The Rear Of The Device

    Model 11-R 2.1.2 Filter chamber and certifications on the rear of the device Figure 2-3: Control elements and labelling on the underside of the Mini-LAS 11-R 17 Filter chamber with bayonet closure 18 PTFE filter (not marked in the illustration)

  • Page 20: Display

    - Up to relative humidity of 49 %: green - Up to relative humidity of 74 %: yellow - From relative humidity of 75%: red Figure 2-5: Humidity indicator GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 20 von 83...

  • Page 21: Particle Concentration

    PC. Only SD memory cards can be used. The maximum storage time depends on the chosen storage interval and the capacity of the memory card. The memory card must be installed in standby mode before measuring begins. GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 21 von 83...

  • Page 22: Initialising The Memory Card

    Only remove the memory card from the device in standby mode. The memory card can be read and erased using any Windows PC with a card slot or external card reader. Reading or erasing the memory card with the Mini-LAS 11-R is not possible. GRIMM AEROSOL TECHNIK GmbH & Co.KG...

  • Page 23: Meaning Of The Leds Next To The Card Slot

    The memory card can be read using a PC with card reader function or an external SD card reader.  Reading or erasing the memory card with the Mini-LAS 11-R is not possible. GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 23 von 83...

  • Page 24: Membrane Keyboard And Key Functions

    The measuring cell is not flushed if there is a sudden loss of power. Figure 2-11: Membrane keyboard on the Mini-LAS 11-R with the 10 function keys and Figure 2-5: Membrane keyboard on the 11-R with the 10 function keys and...

  • Page 25: Button Functions In Standby Mode

    Please note that data sent over the RS-232 interface and recorded on the memory card are of the same type shown on the display. That means either mass or particle concen- trations can be recorded! GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 25 von 83...
  • Page 26 Pressing the {Date/Time} button again advances the cursor. If no button is pressed for some time (approximately 3 seconds), the device returns to standby mode. When changing the minutes, the seconds are simultaneously reset to zero. GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 26 von 83...

  • Page 27: Button Functions In Operating Mode

    When the alarm value is 0 the alarm function is inactive. The speaker for the acoustic warning signal is behind the circle. GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 27 von 83...
  • Page 28 The error states are also stored in the datasets on the memory card and output over the RS- 232 interface. GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 28 von 83...

  • Page 29: Brief Overview Of The Button Functions

    Display of the serial number and hours of operation. During question “Filter Changed? Yes or No?”: {+} or {-} {- }: Calculation of the filter weight continues {+}: Calculated filter weight is reset to zero GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 29 von 83...

  • Page 30: Sample Intake

    Then the suction head is easily removed. Various sample collection systems are available depending on the application. Also see the list of accessories in Section 7.3. Figure 2-13: Removing the suction head GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 30 von 83...

  • Page 31: Analogue Jack

    Before the 11-R spectrometer is used for the first time, the lithium-ion battery in the device has to be fully charged. Charging can take up to 8 hours. Connect the 1112C mains charger to the jack on the Mini-LAS 11-R. GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 31 von 83...

  • Page 32: Rs-232 Interface

    The serial interface in the form of a 9-pin jack is on the right side panel. This interface can be used to control the dust monitor and send the measurement data to a PC. Always use the original GRIMM USB/RS-232 data cable with the catalogue number 1141A, see Figure 8-2. By default the RS-232 inter- face is prioritised and can be deactivated by the USB, LAN or Bluetooth interface.

  • Page 33: 2.11 Usb (Universal Serial Bus) Connection

    The Mini-LAS 11-R has two USB interfaces on the left side panel: One USB interface for control and one for storage. When you connect a USB stick to your Mini-LAS 11-R via USB-A, you can use the following functions: - Measurement data backup to a USB stick...

  • Page 34: Figure 2-17: Configuring The Tcp/Ip Connection

    Settings in the terminal programme Figure 2-17: Configuring the TCP/IP connection Connect your terminal programme to the measuring device. Send a “v” to activate the interface. GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 34 von 83...

  • Page 35: 2.13 Gps Antenna

    When a GPS antenna (1146) is used, the GPS data for the current device location are entered in the P- line after rH_i and Temp_i. They can be read using a terminal programme or the GRIMM Windows 1178 software. With the GRIMM Windows 1178 software, note that receiving GPS data has to be checked off in the software.

  • Page 36: 2.15 Ptfe Filter

    2.18 Calibration label The calibration label on the underside of the device states the month and year when the calibration expires. After expiry, GRIMM Aerosol Technik no longer warrants the accuracy of the measure- ments within the specified error limits. This also applies if the cali- bration label is damaged or removed.

  • Page 37: 2.19 Device Designation And Serial Number

    1152. If the sample air discharge is blocked, the device will shut down. The sample air discharge can also be used for leak testing. GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 37 von 83...

  • Page 38: Particle Measuring With Grimm Dual Technology

    This dual technology is unique and patented by GRIMM Aerosol Technik. The measurements can be output as a particle concentration in the unit of particles per litre or as a mass concentration in the unit µg/m³.

  • Page 39: Measuring Principle

    A laser diode serves as the light source in all GRIMM laser aerosol spectrometers and dust monitors. With the Mini-LAS 11-R, the wavelength is in the visible range of 660 nm. The laser diode can be oper- ated in what is known as multiplex mode, which means that the intensity of the laser beam is modulat- ed.

  • Page 40: Figure 3-2: Schematic Of The Laser Measuring Chamber

    R uses 31 size channels. Capturing the particle concentration and particle size makes it possible to capture the size distribution of the aerosol particles, which in turn is the foundation for calculating the particle mass. GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 40 von 83...

  • Page 41: Calibration, Physical Background

    As the master device, the first GRIMM reference unit was in turn compared to the laser aerosol spectrometer model LAS-X from PMS Boulder, Colorado as a reference unit. We ensure correct particle size measurements in the specified channels with this procedure.

  • Page 42: Figure 3-3: Screenshot Of The Grimm Calibration Software During With A

    Figure 3-3: Screenshot of the GRIMM calibration software during with a reference unit and candidate (here: GRIMM Environmental Dust Monitor with 31 channels The table in the illustration shows a section of the calibration with results of the calibration process, when there are at least 3 matches between the accumulated count values of the devices and the refer- ence unit in the respective channel size.

  • Page 43: Figure 3-4: Calibration; Simultaneously Measured Particle Concentration

    500 particles per litre of air, it is considered successfully calibrated. The following screenshot from the GRIMM calibration software CalSoft is provided for clarification. What are known as “ramps” show an example of the measured particle concentration for a candidate com- pared to the reference unit, respectively after calibration.

  • Page 44: Measurements

    Standalone operation For properly putting the device into operation, follow the steps and information below. Never operate the device without a PTFE filter! Only use the original GRIMM 47 mm PTFE filter! Check whether the gravimetry filter (PTFE filter) is properly installed as shown in the illustration to the right.
  • Page 45 This process takes about 30 seconds. Self-Test If you want to modify any operating parameters during this time, you have to put the device into standby mode again. Standby Mode Press 2nd Key GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 45 von 83...

  • Page 46: Measurement

    USB stick, or for operation with HyperTerminal or the GRIMM Windows software 1178, sent over the respective interface. This means that either mass or particle concentrations can be displayed and recorded.

  • Page 47: Mode Switching Particle Count/Particle Mass

    - Particle mass in 31 mass channels in µg/m³ Mode switching particle count/particle mass On the Mini-LAS 11-R: See 3.5.1.2 “Setting the measuring mode and selecting the size channels to be displayed” Via terminal software: “N” to switch to normal mode (mass) “C”...
  • Page 48 On the other hand, the measurements on the memory card and output over the RS-232 interface are not corrected. The gravimetry factor ap- pears in the P-line. GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 48 von 83...

  • Page 49: Analysis Software

    5.1.2 Establishing a HyperTerminal connection Connect the dust monitor to the PC with a GRIMM USB/RS232 cable (1141A) and turn the device on. After installing the terminal programme under Windows 7, you will find it under: START->All programs ->Accessories ->HyperTerminal 1) Select a serial interface.

  • Page 50: Figure 5-2: Transmission Parameters

    4.) Press “ENTER” to start the data transfer. Once the data transfer is complete, OK appears under the final dataset. Then go again to TRANSFER - > RECORD TEXT -> END. GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 50 von 83...

  • Page 51: Rs-232 Commands

    PUMP CURRENT TOO HIGH Motor current I > 100% “3” FLOW-ERROR Volume flow control outside the control range “2” CHECK FILTER < 20% “1" CHECK FILTER > 60% Request for mass value transfer/turn off fast mode GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 51 von 83...
  • Page 52 Output mean value and sample volume (count mode in the example that follows) Comments: The display on the model 11-R has four lines (Mc: Mc; mc: mc;). Turn on mass display, turn off count mode GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 52 von 83...
  • Page 53 Time output. The clock can be set in standby mode. If the minutes are changed, the seconds are set to zero. Timer operation for turning the dust monitor on and off automatically. In this operating mode, turning the Mini-LAS 11-R on and off can be programmed with the fol- lowing input: - Month (Mon)
  • Page 54 The three “user” texts are output in the first line. The second line first shows the three multiplication factors for the analogue voltages and then the offset values. Analogue 4 is assigned internally. Turn the dust monitor on Long Break GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 54 von 83...

  • Page 55: Figure 5-5: Help Screen Of The Mini-Las 11-R

    Model 11-R Figure 5-5: Help screen of the Mini-LAS 11-R Autocal. The device stops during an ongoing measurements after the configured number of hours. The measurement begins again automatically after self-test. Example: ; 99 After an ongoing measurement over 99 hours, the device turns off and starts with a self- test.

  • Page 56: Service Mode Setting

    To return to measuring mode, press | and the space bar {ASCII character 124} and {ASCII character 32}. You will find the | key on the relational operator key of your keyboard. GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 56 von 83...
  • Page 57 Data presentation in service mode with brief explanation of the P-line values: Year Mon Err Qbatt P_Weight P_Vol{l} rH_i Temp_i GPS-Position 36.2 33.6 N51.6279 E12.3962 H97 132940 77350 48435 22270 9325 4610 3210 1795 1305 1050 GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 57 von 83...

  • Page 58: Rs-232 Measurement Transmission

    (control command {_}) and edited (control command {*}). A user text (control command {$}) can also be set on the device for each sensor. GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 58 von 83...
  • Page 59 6 = 6 seconds or faster, the unit is particles per 0.1 l. In particle mass measuring mode, designated as normal mode in HyperTerminal, the unit is always µg/m³. GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 59 von 83...

  • Page 60: Model 11-R, Version 12.40, Particle Number Measuring Mode (Counts)

    Model 11-R version 12.40 measuring mode channel masses in µg/m³ 35.7 34.1 32.9 32.2 31.7 31.3 31.2 31.1 31.0 31.0 30.9 30.9 30.9 30.8 30.6 30.4 29.9 28.6 28.3 27.7 27.3 27.3 27.3 25.0 25.0 0.0002 m3 GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 60 von 83...

  • Page 61: Grimm Windows 1178 Software Incl. Installation Of The Software

    PM values and mass fractions according to occupational safety The GRIMM 1178 software supports online statistical data analysis, the analysis of the device functions and a complete system diagnosis. The software is provided to you with the order on the supplied USB stick. The installation instructions refer to installation from the USB stick.

  • Page 62: Figure 5-7: Home Screen Of The 1178 Software

    Figure 5-8: Measuring interval settings The device clock is highly pre- cise. Synchronisation is only required about every three months or after changing the time zone. Figure 5-9: Time synchronisation GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 62 von 83...

  • Page 63: Figure 5-10: Setting User Information

    The pane to the left shows the count values in selected rang- es and also the mass values. The pane to the right shows the count values across all channels. Figure 5-11: Count values GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 63 von 83...

  • Page 64: Figure 5-12: Graphical Particle Count Distribution

    Further analyses of the counts, for example regarding the particle diameters, number of particles in table form and other characteristics, are possible with the GRIMM Windows 1178 software. Further information is found in the manual for the GRIMM Windows 1178 software.

  • Page 65: Troubleshooting (Display Messages And Status Indicators)

    Contact service but do not open the device. CHECK FILTER < 20% Use the original GRIMM PTFE filter and correctly install it in the filter chamber. CHECK FILTER > 60% Use the original GRIMM PTFE filter and correctly install it in the filter chamber.

  • Page 66: Maintenance And Cleaning

    Maintenance and cleaning Maintenance and cleaning by the customer Some maintenance on the Mini-LAS 11-R can be carried out by the customer. This maintenance work is described in this section. Other maintenance work, such as internal filter replacement, must be carried out by authorised service technicians.

  • Page 67: Cleaning The Measuring Chamber

    A dry cloth should be used to clean the housing, or moist cleaning cloths for IT equipment in case of tough dirt. Protect the device against contact with liquids! GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 67 von 83...

  • Page 68: Replacement Of The Ptfe Filter

    Make sure to replace the filter in a timely manner for this reason, no later than when the corresponding warning is displayed. A filter load over 20 mg should be avoided if possible. GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 68 von 83...
  • Page 69 Some regional dealers maintain their own calibra- tion laboratory at their site. If this is not the case for your dealer, please contact GRIMM Aerosol Tech- nik GmbH & Co. KG for an offer and to coordinate the process.

  • Page 70: K-Line, Function Test Of The Optical Measuring Cell, Laser Diode And Photo Diode

    0. A value not equal to zero indicates un- wanted particles in the measuring cell, e.g. due to a leak in the sample air path. GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 70 von 83...

  • Page 71: Repair

    1292 1654 the laser diode in a GRIMM aerosol spectrometer is operated with two alternating laser outputs in what is known as multiplex mode. La_l “low” means low laser current in mA and La_h “high” means high laser current. If the La_h current increases to values greater than 180 mA, the laser diode is probably defec- tive.

  • Page 72: Technical Specification

    Filters optimised for low pressure loss are used so that power can be supplied by the battery as long as possible. Figure 7-1: Pneumatics schematic of the Mini-LAS 11-R A purge air circuit to protect the optical components passes through the measuring chamber in operat- ing mode.

  • Page 73: Technical Data

    0.1 to 100,000 µg/m³ Reproducibility: ±3% across the entire measuring range Sample volume flow: 1.2 l/min, ±5% constantly controlled Purge air volume flow: 0.3 l/min, constantly controlled Automatic follow-up cleaning in standby mode GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 73 von 83...
  • Page 74 In case of power loss during a measurement, all mean values with the corresponding sample volumes are saved so that the measurement is automatically continued when power is restored. GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 74 von 83...

  • Page 75: Accessory List

    Model 11-R Accessory list Required and recommended accessories Product no. Description 1141A Special GRIMM RS-232 on USB data transfer cable (with larger buffer) 1112C Power supply/charger 220/110 V 1113A PTFE filters (25) 1111 Radially symmetrical sample collection head 1119 Straight connection tube, length 3 cm 1142.SD4GB SD memory card 4 GB...
  • Page 76 1146 GPS antenna for aerosol spectrometer 11-R and 11-E Sources of supply Accessories and consumables are available from GRIMM Aerosol Technik GmbH & Co. KG Dorfstraße 9 D - 83404 Ainring (Germany) Tel.: +49 (0) 8654-578-0 GRIMM AEROSOL TECHNIK GmbH & Co.KG...

  • Page 77: Sample Collector

    Since the dust and particle measuring devices are equipped with volume flow control (1.2 l/min or 72 l/h), the suction speed can be determined exactly by the geometry of the sample collector. A suitable sample collector should therefore be used according to the application. GRIMM offers the following models: 7.4.1...

  • Page 78: Clean Room Sample Collection Heads With Stand (Model 1151A)

    0.5 m/s -Gold nozzle: 0.5 to 1.0 m/s -Green nozzle: 1.0 to 2.0 m/s -Blue nozzle: 2.0 to 4.0 m/s Separate installation instructions are provided for this application. GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 78 von 83...

  • Page 79: Isokinetic Duct Probe For 2 To 25 M/S (Model 1152)

    Wrench 8/10 for nozzle replacement and attaching the banjo fitting on the left side of the device. Also (1) air duct, (5) sample air to measuring device, (6) exhaust air duct Figure 7-8: Parts of the duct probe GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 79 von 83...

  • Page 80: Installation Of The Duct Probe 1152

    The grey PVC hose c) conducts the sample air back and is connected to the sample discharge on the Mini-LAS 11-R without tools. Note: To avoid particle losses due to sedimentation in the silicone tube as far as possible, the distance between the duct probe and the sample intake on the dust monitor should be as short and straight as possible or vertical.

  • Page 81: Zero Filter (Model 1148)

    This sensor due to its low power input is ideal as an accessory for all dust monitors. The sensor values can be shown online on the display, via HyperTerminal or in the sensor window of the GRIMM Windows 1178 software. Knowledge of the relative humidity is fundamental for the interpretation and analysis of aerosol measurement data.

  • Page 82: Temperature, Humidity And Air Speed Sensor (Model 1154)

    Figure 7-12: Sensor 1154 Humidity range: 0 to 100 % relative humidity Resolution: 0.1 % Accuracy: Typically 3.5 % Wind speed: 0.4 to 20 m/s Resolution: 0.1 m/s Accuracy: Typically ±1% GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 82 von 83...
  • Page 83 58.3 35.0 56.1 40.0 54.5 50.0 52.4 60.0 51.4 80.0 50.4 100.0 50.1 Graphical presentation Illustration, appendix: Size distribution of dust particles according to EN 481 Dust in the Workplace GRIMM AEROSOL TECHNIK GmbH & Co.KG Seite 83 von 83...

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