HM 1400 TRX Total Mercury Analyser - Webshop, Gas Analysis ...

8. Measuring device check (option)8.4 Checking procedureWARNINGRisk of poisoning and chemical burnsChemicals, in this case mercury, hydrochloric acid and tin(II) chloridedihydrate in principle give rise to particular dangers. Therefore, they mustalways be handled with the necessary care by appropriately trainedpersonnel. Please comply with the information provided on the safety datasheets provided with these chemicals. Persons handling these substancesshould be familiar with the contents of these extracts. Extracts from the"Mercury" safety data sheet can be found in the Appendix to this manual!1. Connect the calibration module to the device2. Dissolve defined concentration of mercury stock solution (example: Hg 2+0.5 mg/l) in HCl 1 mol/l,3. Fill glass vessel with appropriate concentration of mercury stock solution,4. Immerse hose end of dosing pump in the solution,5. Dissolve SnCl 2 (flakes, powder) in HCl 1 mol/l (10 ... 50 g SnCl 2 per l HCl 1mol/l),6. Pour approx. 100 ... 120 ml of the dissolved SnCl 2 into the calibrationreactor and seal with glass insert,7. Connect hoses to measuring setup according to Figure 8.1: Functionalprinciple of wet chemical Hg0 generator for device calibration,8. Switch measuring system to calibration mode and wait until the systempressure and flow have stabilised ( display),9. Now start the calibration (a constant value will appear on the display afterapprox. 10 minutes),10. Only apply this new value if you are sure that the measuring system is leakfreeand other errors can be excluded.Note:Attention!!1. Applying these results will permanently adjust the span of the storedcalibration curve. The numeric value of the span can be queried in themenu. Normally the numeric value is between 0.8 and 1.2.2. Before handling the specified chemicals, the pertinent safety data sheetsmust be complied with.HM 1400 TRX 71