palintest Macro 900 Operation Manual

Contents

palintest Macro 900 Operation Manual Manual pdf 135 page image

Macro 900 Operation Manual V3© 2013 Palintest Ltd. www.palintest.com Page 135 of 14722. Appendix 2. Flow Through Cell22.1. IntroductionThe Palintest Flow Through Cell (Flowcell) is designed for use with any model ofMacro Accessory Probe and most third party pumping devices.The Flowcell allows sample water to flow up through the probe, passing over allthe individual electrodes simultaneously. This eliminates air contact withpumped samples from groundwater boreholes allowing truly representativemeasurements to be obtained.Made from marine grade aluminium and 6mm wall thickness acrylic, theFlowcell is ruggedly constructed for hard use in the field. The base flangeincludes four holes to allow the unit to be pegged down if necessary.22.2. Spigot InstallationThe Palintest Flowcell is supplied with two pairs of spigots, one pair to fit 6mm(1/4”) ID tube and one pair to fit 10mm (3/8”) ID tube.The spigots have a tapered thread so should be screwed into the inlet andoutlet holes of the Flowcell until they are tight. At this point, they should sealdue to the taper. If a spigot will not seal properly, remove it then re-insert withsome PTFE plumber’s tape wrapped around the thread.22.3. Probe InstallationThe probe sleeve and protective Sleeve EndCap must be fitted to the MAP.Loosen the screw collar located at the topof the Flowcell and slide the MAP in all theway, ensuring it is properly seated in therecess where the clear tube enters thebase. Tighten the collar to clamp the MAP inplace.22.4. OperationConnect the Flowcell to a pumping deviceso that sample water enters at the bottomand exits at the top. Adjust the flow rate sothat there is no visible turbulence orcavitation within the Flowcell. Connect aMacro 900 Meter and monitor the readings.If the readings are jumpy or erratic, reducethe flow rate. The ideal flow rate is around30 litres/hour (8 US gallons/hour), althoughthe MAP is capable of operating at flowrates as low as 15 litres/hour (4 USProbe