SKC chek-mate 375 Series Operating Instructions Manual
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chek-mate Flowmeter
Cat. No. 375 Series
Operating Instructions
Inlet
Low battery
indicator
LCD screen
On/off button
INTRODUCTION
Description
The chek-mate
Flowmeter (Figure 1) is designed specifically for use with air sample pumps and is
®
available in three models as described below:
•
High Flow chek-mate Flowmeter with CalChek Cat. Nos. 375-50300N, 375-50300, and
375-50300S – Flow measurement range of 5 to 30 L/min and CalChek capability. Volumetric
accuracy is 1% of reading for 5 to 30 L/min. The CalChek serial interface enables direct
communication with CalChek-ready pumps in the chek-mate flow range for single-point (single)
and multiple-point (full) automatic flow calibration.
•
Medium Flow chek-mate Flowmeter with CalChek Cat. Nos. 375-0550N, 375-0550, and
375-0550S – Flow measurement range of 0.5 to 5 L/min and CalChek capability. Volumetric
accuracy is 1% of reading for 0.75 to 5 L/min and 2.5% of reading for 0.5 to 0.75 L/min. The
CalChek serial interface enables direct communication with CalChek-ready pumps in the chek-
mate flow range for single-point (single) and multiple-point (full) automatic flow calibration.
skcinc.com
Outlet
CalChek interface socket
(high flow and medium flow
models only)
Front view
Figure 1. chek-mate Flowmeter Overview
Form 39013 Rev 210827
Battery compartment
cover
Battery
Back view
Page 1
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Summary of Contents for SKC chek-mate 375 Series
- Page 1 chek-mate Flowmeter Cat. No. 375 Series Operating Instructions Outlet Inlet CalChek interface socket (high flow and medium flow models only) Low battery indicator Battery compartment cover LCD screen On/off button Battery Back view Front view Figure 1. chek-mate Flowmeter Overview INTRODUCTION Description The chek-mate...
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Page 2: Required Equipment
Checking Flowmeter/Kit Contents Use the table below to verify that you received all items associated with the Cat. No. ordered. If you are missing items, contact SKC at 800-725-8472 (U.S. only) or 724-941-9701. If You Ordered Cat. Your Package Should Contain... -
Page 3: Getting Started
Avoid extended use of the chek-mate in areas with high levels of airborne particulates. If this cannot be avoided, use an external inlet filter with high collection efficiency (i.e., one that collects the majority of all dust particles) and low back pressure. SKC does not supply this. •... -
Page 4: Operation
OPERATION Set/Calibrate Flow Rate • Allow the chek-mate to equilibrate for at least 10 minutes after moving it from one temperature extreme to another. • Protect the chek-mate from direct exposure to sunlight to prevent it from heating the case. •... - Page 5 b. For high flow model, use flexible 3/8-inch ID tubing and place Pulsation Dampener Cat. No. 375-150 in line between the flowmeter outlet and representative sample medium inlet. If required by the sampler, use a calibration adapter. See Figure 3. Pump inlet Pulsation Flowmeter...
- Page 6 Automatic Power Off Timer — chek-mate will remain on indefinitely provided that a flow rate higher than the minimum display value (see Step 1 above) is indicated. With a flow rate lower than the minimum display value or no airflow (“ ”...
- Page 7 b. Install other connector end of cable into CalChek port on back of charging cradle (or e-Cradle) for AirChek TOUCH pump or into data port on top of Leland Legacy pump. Data port AirChek TOUCH charging cradle CalChek port Leland Legacy data port 4.
- Page 8 FLOW CALIBRATOR Power FOR AIR SAMPLING PUMPS supply 0.5 - 5.0 litre/min S/No18544134 CALIBRATE UNDER VACUUM MANUFACTURED BY SKC LIMITED UNDER A SOLE LICENSE FROM GRAHAM BLATCHFORD www.skcltd.com CalChek cable Figure 6. CalChek Full Calibration Train (AirChek TOUCH Pump) Flowmeter outlet...
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Page 9: Maintenance
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 with the chek-mate connected in series with the reference flowmeter. - Page 10 SKC CAL Service offers calibration and documentation for the chek-mate and other flowmeters. The SKC Calibration Laboratory will calibrate the chek-mate at predefined flow rates. NIST-traceable and ISO/IEC www.skcinc.com/skccal 17025:2017 services are available. Order SKC CAL Service at Important notes/recommendations for third-party flow calibrations: •...
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Page 11: Accessories/Replacement Parts
SKC Limited Warranty and Return Policy SKC products are subject to the SKC Limited Warranty and Return Policy, which provides SKC’s sole liability and the buyer’s exclusive remedy. To view the complete SKC Limited Warranty and Return Policy, go to skcinc.com/warranty. - Page 12 APPENDIX Performance Profile Flow Measurement High flow: 5 to 30 L/min Range Medium flow: 0.5 to 5 L/min Low flow: 20 to 500 ml/min Airflow Display High flow: 0.01 L/min Resolution Medium flow: 0.001 L/min Low flow: 0.01 up to 100 ml/min and 0.1 above 100 ml/min Airflow Accuracy ±...
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