SLQ-QT500 Datasheet, PDF (2/7 Pages) List of Unclassifed Manufacturers – High Purity Flow Meter

1.1 Calibration Field Information
The SLQ-QT500 Liquid Flow meter holds two
calibrations, one for isopropyl alcohol (IPA) and one
for water. Each calibration is stored on a separate
calibration field (CF):
 Calibration field 0: IPA (factory default)
 Calibration field 2: H2O
The default calibration field (i.e. the active calibration
field at power up) can be permanently changed via
I²C or RS485 commands. Alternatively, the default
calibration field can be changed using the USB-
RS485 Sensor Viewer which is part of the Flow Meter
Kit and also available in the download center on the
Sensirion liquid flow webpage.
www.sensirion.com/liquidflow-download
The standard calibrations cover the flow range
from -2500 µl/s to +2500 µl/s. Extended calibration
ranges for both IPA and water are available on
request.
1.2 Sensor Measurement Configuration
The default measurement configuration of the
SLQ-QT500 is optimized for the measurement of
short dispensing processes. For measuring
continuous flow rates, a different setting for the micro-
heater is preferred. The default setting can be
permanently changed via I²C or RS485 commands.
Alternatively, the default heater setting can be
changed using the USB-RS485 Sensor Viewer.
2 Specification Charts
Figure 1: Flow meter accuracy and repeatability across the flow range. Relative error in % of measured value (left column) and
absolute error in µl/s (right column) for IPA (top) and H2O (bottom)
www.sensirion.com
Version 3 – October 2014
2/7