www.skcltd.com
chek-mate Air Flowmeter
Operating Instructions
This manual covers the following models:
375-00205 / 375-0550
Page 1: ...www skcltd com chek mate Air Flowmeter Operating Instructions This manual covers the following models 375 00205 375 0550 ...
Page 2: ...f 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 is the only authorised service centre in the UK guaranteeing you access to the full range of genuine SKC replacemen...
Page 3: ...1 Contents Specifications 2 Introduction to the chek mate Flowmeter 4 General Information 6 Diagram of the chek mate Flowmeter 8 Using the chek mate Flowmeter 10 Battery Care 14 Calibration of the chek mate Flowmeter 16 Notes 18 Warranty 20 ...
Page 4: ... min 1 of reading 0 5 to 0 75 litre min 2 5 of reading 0 75 to 5 0 litre min 1 of reading Weight 232 g 8 2 oz 236 g 8 3 oz Operating temperature range 0 C to 40 C 32 F to 104 F Operating atmospheric pressure range 700 mbar to 1090 mbar 20 7 inHg to 32 2 inHg Operating altitude Sea level to approximately 3050 m 10000 ft above sea level Enclosure IP rating IP40 Battery 9V alkaline disposable PP3 6LR...
Page 5: ... 3 33 5mm 1 3 178 5mm 7 1 Note SKC Ltd reserves the right to make changes to the specification and design of this product at any time without prior notice to the end user The chek mate flowmeter is manufactured by SKC Ltd under a sole license from Graham Blatchford ...
Page 6: ...e sensor This type of flowmeter gives a mass flow reading meaning that the pressure drop across the orifice will be constant for a given mass flow of gas independent of the density of the gas The chek mate also incorporates an ambient temperature sensor and an atmospheric pressure sensor and uses the readings of these sensors to correct the mass flow reading generated by measuring the pressure dro...
Page 7: ...nication cable P N 375 200 which plugs into a socket on the right hand side of the chek mate and to the serial interface port on the pump The chek mate automatically outputs its flow rate reading via the CalChek serial interface at 3 5 second intervals when airflow through the chek mate is present Refer also to the specific pump user manual for detailed instructions on performing CalChek calibrati...
Page 8: ...sure Ensure that fluids do not enter the flowmeter inlet or outlet ports If the flowmeter has been stored in a cold location and is immediately taken to a hot humid location do not use the flowmeter until it has stabilised to the higher ambient temperature to prevent condensation forming inside the flowmeter The flow meter case is IP40 rated it is not rated as waterproof or splashproof and therefo...
Page 9: ...ct your local distributor or SKC Ltd for further details on how to comply with the requirements of the WEEE Directive SKC Ltd s producer registration number is WEE KH0054TQ 3 The Batteries Directive The alkaline disposable battery supplied with this flowmeter and any spare batteries purchased for it fall within the scope of the European Directive 2006 66 EC on batteries and accumulators and waste ...
Page 10: ...Page 8 007 03 004 Issue D www skcltd com 2 1 5 4 3 6 7 8 Diagram of the chek mate Flowmeter ...
Page 11: ... 007 03 004 Issue D Page 9 Key to Flowmeter Diagram 1 LCD screen 2 Low battery indicator 3 On Off button 4 Inlet port 5 Outlet port 6 Battery compartment cover 7 Battery 8 CalChek interface socket 375 0550 model only ...
Page 12: ...ere is no airflow or the flow rate is below the minimum display value The minimum display value is dependent on the atmospheric conditions but at 20 C and 1013 25 mbar 1atm the values are 5 ml min for the 375 00205 model and 0 3 litre min for the 375 0550 model The minimum display value will be higher when the chek mate is used at higher altitudes and temperatures Note The chek mate flowmeter does...
Page 13: ...f these two readings or Note 10 chek mate readings and calculate the average of the 10 readings Note It is recommended to allow the pump to run for a minimum of 5 minutes to stabilise before adjusting the flow rate e Adjust the air sample pump to give the desired sample airflow rate f Disconnect the tubing from the flowmeter outlet hosetail taking care to pull the tubing in line with the axis of t...
Page 14: ...ng cradle for the AirChek Touch pump and the pump must be fitted to the charging cradle to perform CalChek calibration b When performing a single point CalChek calibration of a complete sample train connect the outlet port of the chek mate to the inlet of the sample train using a calibration adapter if required c A full CalChek calibration which automatically calibrates the pump across its entire ...
Page 15: ...ek mate automatically outputs its flow readings via the CalChek interface at 3 5 second intervals e The pump will automatically read in the chek mate flow readings as required to complete the CalChek process and completion of the process will be indicated on the pump display ...
Page 16: ... the flowmeter is switched on again with the battery in this condition the LCD will indicate bAtt LO ten times and then automatically switch off To replace the battery unfasten the two captive screws securing the battery compartment cover using a Pozi drive size 1 screwdriver and remove the battery compartment cover Lift the old battery straight up out of the battery compartment Fit the replacemen...
Page 17: ...at they must be collected and treated separately from other waste It is recommended to remove the battery from the battery compartment if the flowmeter is not to be used for an extended period of time Deep discharge of alkaline batteries can result in the eventual leakage of battery electrolyte even from quality batteries and can cause corrosion of the battery compartment terminals and potentially...
Page 18: ... pulled through the chek mate by the vacuum generated by the air sample pump To ensure that the SKC factory flow calibration is representative of how the chek mate is actually used the flow calibration is performed under vacuum Factory calibrations are performed by applying the airflow alternately to the chek mate and reference flowmeters SKC recommend that subsequent flow calibrations of the chek...
Page 19: ...t be corrected to these conditions for comparison with the chek mate indicated flow reading 4 The factory flow calibration is performed under vacuum therefore the calibration gas used is ambient air with relative humidity of 50 20 RH When performing positive pressure flow calibrations using compressed dry laboratory air or nitrogen gas the difference in gas density must be corrected for 5 When per...
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Page 22: ...ranties of merchantability or fitness for a particular purpose and neither assumes nor authorises any person to assume for it any liability in connection with the sale of these instruments No description of the goods being sold has been made a part of the basis of the bargain or has created or amounted to an express warranty that the goods will conform to any such description Buyer shall not be en...
Page 23: ... to the Buyer and continue for a period of one 1 year 6 a To obtain performance of any obligation under this warranty the buyer shall return the instrument freight prepaid to SKC at the following address SKC Limited 11 Sunrise Park Higher Shaftesbury Road Blandford Forum Dorset DT11 8ST t 44 0 1258 480188 f 44 0 1258 480184 6 b To obtain further information on the warranty performance contact SKC ...
Page 24: ...bal group of companies SKC Limited 11 Sunrise Park Higher Shaftesbury Road Blandford Forum Dorset DT11 8ST United Kingdom T 44 0 1258 480188 F 44 0 1258 480184 E info skcltd com W www skcltd com 007 03 004 Issue D August 2018 ...
