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SKC 770-300A, Operating Instructions Manual, Page: 20 / 36

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SKC 770-300A Operating Instructions Manual Download Page 20

Page 18 

770-300M Issue E 

www.skcltd.com

5) Set the Alarm Concentration Level

An audible alarm can be set to alert  the worker that the dust concentration level is approaching 

a threshold limit. As a starting point it is recommended to set the alarm concentration level to 

80% of the WEL (Worker Exposure Limit) for the particulate type being sampled.
To set the alarm concentration level, on the main 

menu screen press the up and down keys to highlight 

the Special Functions menu item and press enter to 

show the new screen.

  Run
  Review Data
  Special Functions
  Auto-Zero

On the Special Options menu screen press the up and 

down keys to highlight the Set Alarm menu item.

  System Options
  Date/Time
  Set Alarm
  Cancel

Press the enter key to select the menu option and the 

Set Alarm screen will be displayed.

     SET  ALARM
  

Conc:   ▴00.00 mg/m

  

Use the up and down keys to adjust the value of the  

digit highlighted by the underlined cursor.

     SET  ALARM
  

Conc:   ▵00.00 mg/m

  

Press the enter key to enter the selected digit value 

and the next digit is highlighted by the underlined 

cursor. Use the up, down and enter keys to enter the 

required alarm concentration.

     SET  ALARM
  

Conc:   120.0▴ mg/m

  

On pressing the enter key after adjusting the value of 

the last digit of the alarm concentration the setting is 

saved and the main menu screen is displayed.

  Run
  Review Data
  Special Functions
  Auto-Zero

6) Perform an Auto-Zero

The auto-zero function sets the measurement baseline of the Split2 monitor to zero mg/m³ 

and should be performed prior to beginning a new set of measurements. The battery should 

be fully charged and the unit switched on for at least 10 minutes prior to performing the auto-

zero.
If performing respirable sampling in Passive mode ensure that the auto-zero is performed in 

a clean, dust free environment as in this mode the auto-zero is performed without using the 

zeroing accessory.
If performing sampling in Active mode insert the zeroing accessory supplied with the Split2 

monitor into the IOM inlet on the sensor head and ensure the air sample pump is running.

Setup of the Split2 Monitor for Sampling

Summary of Contents for 770-300A

Page 1: ...www skcltd com Operating Instructions Split 2 Real Time Dust Monitor This manual covers the following model 770 300A ...

Page 2: ...e of purchase and then at yearly intervals on this date However it is the responsibility of the user to perform a risk assessment to determine the necessary frequency of servicing that is required Service Date Service Date Service Date 1 5 9 2 6 10 3 7 11 4 8 12 Please note that SKC Ltd are the only authorised service centre in the UK guaranteeing you access to the full range of genuine SKC replac...

Page 3: ...pling 13 2 Active Sampling 13 Setup of the Split2 Monitor for Sampling 15 1 Set the Flow Rate When Performing Active Pumped Sampling 15 2 Check the Battery Status 16 3 Set the Particle Size 16 4 Set the Sample Rate 17 5 Set the Alarm Concentration Level 18 6 Perform an Auto Zero 19 Sampling with the Split2 Monitor 20 1 Mounting the Split2 Monitor on the Worker 20 2 Initiate Sampling 20 3 Low Batte...

Page 4: ...nger proof Split 2 is not designated as waterproof Battery 7 2V 1 15Ah NiMH rechargeable battery Run time 8 hours minimum with fully charged battery Size 180 x 80 x 45 mm protruding sockets and belt clip excluded from measurements Weight 780 g Flow rate 2 l min using external pump not included 2 Kit Contents Carry Case Split2 monitor in carry pouch with detachable shoulder strap Sensor head assemb...

Page 5: ...l min flow rate Belt clip on monitor or removable shoulder strap on carry pouch for mounting on worker and lapel clip on sensor head for attachment within the worker s breathing zone for personal sampling Simple cleaning of sensor hardware Operational Features On screen programming of sampling and data storage parameters Real time clock User selectable audible alarm In field zero and span check of...

Page 6: ...y please contact SKC Ltd customer services on 44 0 1258 480188 or download at www skcltd com 3 The WEEE Directive This product is marked with the crossed out wheelie bin symbol which identifies that it falls within the scope of the EU Directive 2002 96 EC on waste electrical and electronic equipment WEEE At the end of it s useful life this product must be disposed of in an environmentally sound wa...

Page 7: ...ltd com 770 300M Issue E Page 5 Split2 Monitor Diagram Split2 Monitor RS 232 Data Port Sensor Head Socket On Off Switch Charging Socket Keypad LCD Screen Sensor Head Plug Sensor Head Sensor Bracket Spring Clip ...

Page 8: ...cltd com Sensor Head Exploded Diagram IOM dust cap IOM front plate IOM inlet Rubber seal Sensor head body Sensor head bracket O rings Filter IOM cassette grid IOM body O ring Tube end cap IOM cassette inlet For gravimetric analysis ...

Page 9: ...e matching charging socket on the side of the Split2 monitor Plug the charger into the electrical mains supply and switch on the power When fully charged disconnect the charger plug from the Split2 monitor 2 The On Off Push Button Power can be supplied to the Split2 either from its internal battery or from a mains power source by leaving the charger connected Press the on off push button switch on...

Page 10: ...ill not wake from standby check that it is on by pressing the on off push button on the side of the monitor If the monitor will still not wake from standby mode charge it fully When first switched on the Split2 unit monitor will display the welcome screen as shown Split 2 Real Time Dust Monitor SKC Ltd V3 2 2 03 To clear the welcome screen and display the main menu screen press the enter key Run R...

Page 11: ...tion and the new screen will be displayed System Options Date Time Set Alarm Cancel In some screens such as the Set Date Time screen use the up and down keys to adjust the underlined value Time Date Day Press the enter key to enter the selected value and adjust the next digit of the setting Time 1 Date Day ...

Page 12: ...cial Functions menu item indicated by the selection arrow on the screen Run Review Data Special Functions Auto Zero Press the enter key to select the menu item and the Special Functions menu screen will be displayed System Options Date Time Set Alarm Cancel Press the up and down keys to highlight the Date Time menu item on the Special Functions menu screen System Options Date Time Set Alarm Cancel...

Page 13: ...e Cancel Select the Set Date Time menu item and press the enter key to save the date and time just entered or select the Cancel menu item to retain the existing time and date The main menu screen is then displayed Run Review Data Special Functions Auto Zero 2 Clearing the Data Logging Memory The memory of the Split2 monitor can be cleared at any time Note that this operation will clear all data po...

Page 14: ...to highlight the Erase Memory menu item and press enter to show the new screen No Yes Erase Memory DATA WILL BE LOST Select the Yes option and press enter to erase the memory or select the No option to retain the existing logged data in memory The Special Functions menu screen is then displayed System Options Date Time Set Alarm Cancel ...

Page 15: ...IOM front plate fitted to the front of the sensor head and the sensor head mounted onto the bracket in the orientation shown below Secure the sensor head to the bracket with the two thumb screws supplied In Passive mode the Split2 monitor is calibrated to respond to the respirable fraction only and cannot be used to measure the inhalable fraction Also it is not possible to take a filter sample for...

Page 16: ...the IOM sampler SKC part number 391 01 In Active mode with a size selective foam plug fitted to the IOM inlet at the front of the sensor head the Split2 monitor will respond to the respirable fraction Without a size selective foam fitted to the IOM inlet the Split2 monitor will respond to the inhalable fraction Ifafiltersampleistobetakenforsubsequentgravimetricand orchemicalanalysis placea25mm dia...

Page 17: ...mate a calibration adapter for the IOM sampler SKC part number 391 01 and a length of 1 4 bore flexible tubing Connect the outlet hosetail of the flow meter to the hosetail on the calibration adapter with the length of flexible tubing Switchontheairsamplepumpandallowtorunforatleast5minutestostabilisebeforeproceeding Press the foam pad of the calibration adapter firmly against the IOM front plate o...

Page 18: ...tem Options Date Time Set Alarm Cancel On the System Options menu screen press enter to select the Extended Options menu item and show the new screen Extended Options Sample Rate Erase Memory Cancel On the Extended Options menu screen press the up and down keys to highlight the Battery Status menu item and press enter to select and show the new screen Size Select Battery Status Cancel The Battery ...

Page 19: ...le Thoracic Inhalable 4 Set the Sample Rate To set the sample rate on the main menu screen press the up and down keys to highlight the Special Functions menu item and press enter to show the new screen Run Review Data Special Functions Auto Zero On the Special Functions menu screen use the up and down keys to highlight the System Options menu item and press enter to show the new screen System Opti...

Page 20: ...s the enter key to enter the selected digit value and the next digit is highlighted by the underlined cursor Use the up down and enter keys to enter the required alarm concentration SET ALARM Conc 120 0 mg m On pressing the enter key after adjusting the value of the last digit of the alarm concentration the setting is saved and the main menu screen is displayed Run Review Data Special Functions Au...

Page 21: ... displayed Refer to Cleaning the Optics on page 30 for more information AUTO ZERO Please clean optics before auto zero The Auto Zero menu screen is then displayed Press enter to select the Auto Zero menu item and initiate the Auto Zero sequence The Auto Zero status screen is then displayed Auto Zero Cancel The sequence takes 25 seconds and an on screen countdown timer indicates progress At the end...

Page 22: ...workers and vice versa for left handed workers 2 Initiating Sampling If using the Split2 monitor in Active mode start the air sample pump running On the main menu screen press the up and down keys to highlight the Run menu item and press enter to display the new screen Run Review Data Special Functions Auto Zero On the Run menu screen select the Run Continue option to begin sampling with the alarm...

Page 23: ... Selecting either of the two Overwrite sampling options will cause the existing data to be deleted and the new data to be stored in location 001 The dust fraction display indicates the particle fraction setting I for inhalable T for thoracic and R for respirable The minus sign indicates that the Split2 monitor is measuring a negative dust concentration value If this occurs for any reasonable lengt...

Page 24: ...mode stop the air sample pump Remove the equipment from the worker If taking a concurrent filter sample transfer the equipment to a clean dust free environment Check the flow rate refer to page 15 for details and note the flow meter reading for use in the calculation of the dust concentration Remove the sensor head from the bracket Unscrew the IOM sampler body from the rear of the sensor head and ...

Page 25: ...hlight the New Tag menu item and press enter Review Tag 004 New Tag Cancel The Tag Select screen is displayed This is the location tag of the data to be reviewed The range listing indicates the range of data location tags that have data recorded in them TAG SELECT Range 001 thru 005 Tag 00 Press the up and down keys to enter the first digit of the required location tag and press the enter key Repe...

Page 26: ...er to return to the main menu screen T W A Date MON 03 APR 17 TWA 38 94 mg m Elapsed 04 01 28 The final Statistics screen indicates the S T E L Short Term Exposure Level dust concentration and the date and time it occured Press the down key to display the next Statistics screen or press enter to return to the main menu screen S T E L Date MON 03 APR 17 STEL 83 49 mg m Time 11 13 28 The S T E L ind...

Page 27: ...age concentration calculated for the filter sample The filter T W A and the T W A from the Split2 monitor review data see page 23 24 are then used to calculate the custom scale factor as follows Custom Scale Factor Filter T W A Result Split2 T W A Result Example Filter T W A 5 mg m Split2 T W A 4 mg m Custom Scale Factor 5 mg m 4 mg m 1 25 Important Note Applying a custom scale factor to the Split...

Page 28: ...up and down keys to enter the first digit of the custom scale factor and press the enter key Repeat the process to enter the remaining three digits of the required location tag SCALE Scale 01 2 When the last digit is entered the display will return to the Size Select menu screen Select Apply Scale Restore Defaults Cancel The custom scale factor will then be applied to the Split2 monitor reading on...

Page 29: ... close the Properties window Select the Unit menu option on the DustComm Pro window and select Download A progress window will open with the message Awaiting connection On the Split2 monitor from the main menu screen press the up and down keys to highlight the Review Data menu item Press enter to display the Review Data menu screen Run Review Data Special Functions Auto Zero On the Review Data scr...

Page 30: ...ttery must be fully charged refer to page 16 4 The particle size setting must be set to Respirable refer to page 16 17 5 The custom scale factor must be reset to the default value of 01 00 refer to Setting a Custom Scale Factor on page 25 26 Assemble the sensor head as shown below with the IOM inlet rubber seal and IOM front plate only fitted Perform an auto zero refer to page 19 Insert the calibr...

Page 31: ...cific to this instrument Battery maintenance Battery cycling during regular use To maintain optimum capacity during regular battery use cycle the battery once a month Run the Split2 monitor until low battery shutdown occurs then fully charge battery Long term storage and highly infrequent use 1 Charge battery fully prior to long term storage 2 Store in a cool dry place at temperature between 0 and...

Page 32: ...he end of their working life This means that they must be collected and treated separately from other waste Please ensure that any end of life SKC battery packs are collected and recycled or disposed of correctly 3 Cleaning the Sensor Optics It is important to keep the sensor optics of the Split2 monitor clean to ensure the integrity of the optical sensor The condition of the sensor optics should ...

Page 33: ... warranty Clean external surfaces of the sensor head and the instrument if required using pre moistened lens wipes Refit the curved cover plate noting that the foam pad affixed to the underside of the cover plate is closer to the front edge of the cover plate than the rear edge so that it fits into the recess in the sensor head body Secure the cover plate with the three thumb screws fitting the to...

Page 34: ...005 Dust cap for I O M sampler 2 Accessories Part No Description 224 52MTX Sidekick deluxe sample pump with timer 5 3000 ml min ATEX approved 210 3311 AirChek 3000 fully programmable sample pump 5 3250 ml min ATEX and IECEx approved 223 203A Single battery charger 100 240V 50 60Hz supply with UK EU US AUS mains plugs for Sidekick pump 223 240A Single fast battery charger 100 240V 50 60Hz supply wi...

Page 35: ... recover from SKC any consequential damages damages to property damages for loss of use loss of time loss of profits or income or any other incidental damages Nor shall the Buyer be entitled to recover from SKC any consequential damages resulting from defect of the instrument 3 This warranty extends only to the original purchaser of the warranted instrument during the term of the warranty the buye...

Page 36: ... Shaftesbury Road Blandford Forum Dorset DT11 8ST United Kingdom Phone 44 0 1258 480188 Fax 44 0 1258 480184 Email info skcltd com Web www skcltd com 770 300M Issue E April 2020 A I R S A M P L I N G S O L U T I O N S E X P E R T I S E ...

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