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Chapter 2. Introduction
The HM680 Hydronic Manometer is an easy-to-use instrument designed for the accurate measurement of
pressure and calculation of flow in non-potable water and air systems. Features of the manometer include
the following:
Single-function keys for ease of use
Simultaneous measurement and display of High-side gauge and Differential pressure
Direct calculation and display of Low-side gauge pressure
Direct calculation and display of flow
Automatic density corrected readings
Data logging with calculated statistics
Output port for downloading stored data to a computer
User-selectable units of measure
User-selectable time constant
Easy-to-read, dot matrix LCD with backlight
Power supplied via AC adapter or batteries (alkaline or rechargeable NiMH)
Internal NiMH battery charging
Automatic power shutoff
Splash-proof case
Rugged carrying case for storage of meter, hoses, accessories, tools, and paperwork
6-inch temperature probe
Instrument Description
The HM680 Hydronic Manometer includes a meter, 6-inch temperature probe, hard carrying case,
(2) 6-foot (1.8 m) hoses with shut-off valves, (2) P/T gauge adapter probes, (2) B&G readout probes,
(2) ¼” Flare male × ¼” NPT male fittings, AC adapter, (4) NiMH batteries, external battery charger, neck
strap, owner’s manual, and NIST traceable certificate.
Figure 1: HM680 Meter Description
Keypad
Bottom Port Cover
AC Power
Adapter
Input Port
USB Port
Dot Matrix
LCD Display
Pressure
Ports
Neck/Hanging
Strap Clips
Valve Handle
Temperature
Probe Port
Temperature Port Cover
Содержание HM680
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