v
C o n t e n t s
Manual History ............................................................................................ ii
Warranty ..................................................................................................... iii
About This Manual .................................................................................... ix
Formatting and Typography .................................................................. ix
Technical Assistance
—Help! ................................................................ ix
Safety Information ..................................................................................... xi
Labels .................................................................................................... xi
Description of Caution/Warning Symbols ............................................ xii
Caution .............................................................................................. xii
Warning ............................................................................................. xii
Caution or Warning Symbols ............................................................ xii
CHAPTER 1 Introduction ........................................................................ 1-1
Instrument Description ........................................................................ 1-2
Unpacking ........................................................................................... 1-3
CHAPTER 2 Getting Started ................................................................... 2-1
Keypad ................................................................................................ 2-1
Powering the Instrument ..................................................................... 2-2
Using the AC Adapter ...................................................................... 2-2
Battery Installation ........................................................................... 2-2
Battery Charging .............................................................................. 2-4
Instrument Start-up ............................................................................. 2-5
Zeroing the Manometer ....................................................................... 2-5
Zeroing the Gauge Pressure Sensor ............................................... 2-5
Zeroing the Differential Pressure Sensor ........................................ 2-6
Connecting the Manometer to the Test Points.................................... 2-7
Attaching the Hoses to the Manometer ........................................... 2-7
Bleeding the Entrained Air ............................................................... 2-7
Attaching the Hoses to the Test Points ........................................... 2-8
Performing Pressure Measurements .................................................. 2-8
Accessing the Pressure Measurement Screen ............................... 2-8
Pressure Measurement Screen ....................................................... 2-8
Continuous Pressure Measurements .............................................. 2-9
Discrete Pressure Measurements ................................................... 2-9
Performing Flow Measurements ....................................................... 2-10
Accessing the Flow Measurement Screen .................................... 2-10
Flow Measurement Screen ............................................................ 2-10
Continuous Flow Measurements ................................................... 2-11
Discrete Flow Measurements ........................................................ 2-11
Summary of Contents for HM685
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