Scope of investigation for coolants, emulsions according to TrGs 611/BGR-143:
• Refractometer concentration %
• Total oil concentration (DIN 51368) %
• Emulsion stability, centrifuge concentration %
• pH value (DIN 51369)
• Electrical conductivity in MS
• Smell and look
• NO2/NO3 (measured by a reflectoquant)
• degree of corrosion (DIN 51360/T2)
• temperature °C
• hardness dH°
