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Temperature units, Pressure units, Flow rate units – ROTRONIC MBW 373 User Manual

Page 23: Volume ratio units, Weight ratio units, Absolute humidity units, Specific humidity units, Vapor pressure units

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Temperature Units

Temperature values may be displayed in units of °C, °F, or K. When changing temperature
units, all temperature values, whether displayed as numeric or in a graph, change to reflect the
new units selection. Notice that the chosen units will appear on the screen both on the units
selection key and next to any temperature related values currently displayed.

Pressure Units

Pressure values may be displayed in units of Pa, hPa, kPa, MPa, atm, bar, mb, inHg, mmHg,
cmHg, inH

2

O, mmH

2

O, cmH

2

O, Torr, and psia. . When changing pressure units, pressure

values (not including vapor pressure), whether displayed as numeric or in a graph, change to
reflect the new units selection. Notice that the chosen units will appear on the screen both on
the units selection key and next to any pressure related values currently displayed.

Flow Rate Units

The gas flow rate may be displayed in units of l/min, ml/min, l,/h, cfm, and cfh. When changing
flow units, an indicated flow rate will change to reflect the new units selection, whether displayed
numerically or as a graph. Notice that the chosen units will appear on the screen both on the
units selection key and next to the flow rate when displayed.

Volume Ratio Units

Humidity expressed as a volume ratio may be displayed in units of PPM

V

(Parts Per Million by

Volume) or PPB

V

(Parts Per Billion by Volume). When changing these units, volume ratio will

change to reflect the new units selection, whether displayed numerically or as a graph. Notice
that the chosen units will appear on the screen both on the units selection key and next to the
volume ratio when displayed.

Weight Ratio Units

Humidity expressed as a weight ratio may be displayed in units of PPM

W

(Parts Per Million by

Weight) or PPB

W

(Parts Per Billion by Weight). When changing these units, weight ratio will

change to reflect the new units selection, whether displayed numerically or as a graph. Notice
that the chosen units will appear on the screen both on the units selection key and next to the
weight ratio when displayed.

Absolute Humidity Units

Absolute humidity may be displayed in units of g/l, g/m

3

, and lb/ft

3

. When changing these units,

absolute humidity will change to reflect the new units selection, whether displayed numerically or
as a graph. Notice that the chosen units will appear on the screen both on the units selection
key and next to absolute humidity when displayed.

Specific Humidity Units

Specific humidity may be displayed in units of g/g, g/kg, and lb/lb. When changing these units,
specific humidity will change to reflect the new units selection, whether displayed numerically or
as a graph. Notice that the chosen units will appear on the screen both on the units selection
key and next to specific humidity when displayed.

Vapor Pressure Units

Vapor pressure may be displayed in units of Pa, hPa, kPa, MPa, atm, bar, mb, inHg, mmHg,
cmHg, inH

2

O, mmH

2

O, cmH

2

O, Torr, and psia. . When changing vapor pressure units, vapor

pressure will change to reflect the new units selection, whether displayed numerically or as a
graph. Notice that the chosen units will appear on the screen both on the units selection key
and next to vapor pressure when displayed.