Alnor HM685 Digital Handheld Professional Hydronic Manometer

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Alnor HM685 Digital Handheld Professional Hydronic Manometer is designed for balancing and checking performance on hydronic cooling and heating systems. The Alnor HM685 features simultaneous high side and low side with differential pressure up to 300 psi, store and recall up to 4,000 measurements with included software, and two optional temperature probe inputs (1 probe included).

MFG Part No.: HM685

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Characteristics:	Alnor HM685 Digital Handheld Professional Hydronic Manometer
	Simultaneous high side and low side with differential pressure up to 300 psi
	Flow calculations based on manufacturer's Kv factors
	Unit can calculate brake power, heat flow, and impeller diameter
	Store and recall up to 4,000 measurements with included software
	Tough and water resistant case
	Illuminated display
	Two optional temperature probe inputs
	Units of measure: in. H2O, ft. H2O, psi, in. Hg, mm H2O, kPa, mm Hg, or bar
Includes:	Gard carrying case, (2) 6.7 ft x ¼-in. (2 m x 6 mm) hoses with shut-off valves, (2) B&G readout probes, (2) P/T gauge adapter probes, power cord, a temperature probe, CompuDat USB downloading software, and USB interface cable.

Specifications:	Alnor HM685 Hydronic Manometer Digital
Pressure
Differential Range	±300 psi (±2068 kPa)
Gauge Range	-20 to 300 psi (-138 to 2068 kPa)
Resolution (best)	0.001 psi (0.01 kPa)
Accuracy	±1% of reading +.072 psi (0.5 kPa)
Units	psi, in. H2O, ft H2O, kPa, mm Hg, in. Hg, m H2O, bar
Pressure Connection	1/4” 37° flare fitting, Male
Temperature
Operating (electronics)	40 to 113°F (5 to 45°C)
Storage	-4 to 140°F (-20 to 60°C)
Liquid Media	32 to 180°F (0 to 82°C)
Probe	-40 to 250°F (-40 to 121 °C)
Resolution	0.1°F (0.1°C)
Accuracy	±0.5°F (0.3°C) from 32 to 160°F (0 to 71°C); max ± 2.0°F (1.2°C) from -40 to 32°F (-40 to 0°C) and from 160 to 250°F (71 to 121°C)
Units	°F, °C
Flow
Range	0 to 2,271 m3/h, 0 to 9,999 USGPM (0 to 6,31 l/s)
Resolution (best)	0.0001 USGPM (0.00001 l/s)
Accuracy	per pressure accuracy + valve deviation
Units	USGPM, UKGPM, m3/h, l/s, l/m
Time	Constant
Data
Statistics	min, max, average, sum up to 4,000 readings
Data Storage	4,000 combined readings, 100 Test IDs
Logging Interval	User selectable (1, 5, 10, 20, and 30 seconds)
General
External Meter Dimensions	11.1 in. × 4.7 in. × 3.5 in. (28.2 cm × 11.9 cm × 8.8 cm)
Meter Weight with Batteries	2.65 lbs (1.20 kg)
Power Requirements	Four AA-size cells, or AC adapter

Alnor HM685 Digital Handheld Professional Hydronic Manometer

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