Van Walt CT12 Operating Instructions Manual

Contents

Van Walt CT12 Operating Instructions Manual Manual pdf 8 page image

Operating InstructionsVan Walt Ltd | Prestwick Lane | Grayswood | Haslemere | Surrey | GU27 2DU | Tel. 01428 661 660 | Fax. 01428 656 808 | www.vanwalt.comCompact Turbimeter7VAN WALTMonitoring your needsTo index a cuvette, insert the sample cuvette with the orientation mark facingforward. Systematically rotate the sample cuvette 45° at a time and record theposition of the lowest value. This is the optimal cuvette alignment for low turbiditymeasurement.Total Suspended Solids - This mode will only be active if a site calibration has beenstored within the Compact Turbimeter. Once a calibration has been created (viathe Calibration menu) the site ID can be used to recall the site specific relationshipbetween turbidity and suspended solids. Choose Reading mode, select TotalSuspended Solids and press ‘OK’.Highlight the Site ID for the Site/Sample under investigation using the Up/Downarrows. The calibration data will be recalled automatically. Insert the sample withthe orientation mark facing forward and press ‘Read’.A beep will occur at the start and end of each measurement cycle. Result isdisplayed on the screen in mg/l and stored in the log with time, date, Operator IDand Sample ID.CALIBRATION MenuThe Compact Turbimeter is delivered with a stored calibration carried out on primaryFormazin standards and validated as part of the production process. For field use aset of calibration standards are provided as part of the kit.Two different methods of calibration are available for the Compact Turbimeter.The calibration methods are :SDVB – The use of SDVB for field calibration of turbidity meters is preferable dueto the improved stability and handling compared to Formazin. When calibratingturbidity instruments, SDVB standards are assigned to a specific model and cannotbe transferred. Using SDVB standards from another manufacturer may differ greatlywhen applied to the Compact Turbimeter. This is normal behavior and should notcause concern.