DH Instruments COMPASS FOR MOLBOX, User Manual

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COMPASS

for molbox™ User’s Manual
© 1998-2003 DH Instruments, Inc .
Page 154
14.2 FLOW UNIT EDITOR
The <Flow Unit Editor> is accessed by selecting <Edit Units> in a any flow unit of measure drop
down list.
When the <Flow Unit Editor> first displays it is in view mode . This means that any flow units can be
viewed by selecting the unit from the <Flow Unit> list. If any part of a unit is modified or the <New> or
<Copy> options are selected, the editor changes to edit mode . In this state, existing units cannot be
viewed until the flow unit is saved. The toolbar at the top of the editor provides option buttons to save an
edited flow unit, create a new flow unit, restore an edited flow unit or delete an existing flow unit. The icon
representations of these buttons are common to other
COMPASS editors.
When creating a new flow unit of measure, always start by selecting a <Base Unit> . If a standard
volumetrically based mass flow unit is selected (sccm, slm, etc.), entries for the <Reference
Temperature> and <Reference Pressure> are provided. Change the dimensions of a flow unit by
creating a <User Defined Unit> then applying a multiplier to change the unit.
Table 55 provides information on the fields and functions of the <Flow Unit Editor> .
The flow units kg/s, mg/s and mols/s should never be deleted or modified. COMPASS must use the
flow units in their raw form to read flow data from the molbox.
See the molbox Operation and Maintenance Manual, [Unit] Section for additional information on flow
unit types and units of measure.
Figure 89. <Flow Unit Editor> Panel