Specification Conditions of the 1290 Infinity III Evaporative Light Scattering Detector (G7102A)

ASTM: “Evaporative Light Scattering Detectors Used in Liquid Chromatography”.

**Table:** Reference conditions
Gas flow	1.6 SLM
Neb temperature	70 °C
Evaporator temperature	70 °C
Data Rate	40 Hz
Smoothing	1

ASTM drift tests require a temperature change below 2 °C/h (3.6 °F/h) over one hour period. Our published drift specification is based on these conditions. Larger ambient temperature changes will result in larger drift. Better drift performance depends on better control of the temperature fluctuations. To realize the highest performance, minimize the frequency and the amplitude of the temperature changes to below 1 °C/h (1.8 °F/h). Turbulences around one minute or less can be ignored. ASTM measurements require that the detector should be turned on enough time before start of testing.