Hydronic Manometers models HM670 and HM680

Hydronic Manometers

models HM670 and HM680

The HM670 and HM680 Hydronic Manometers are used to balance hydronic heating and cooling systems and to check pump performance. Both models can measure and display differential, high side, and low side pressures simultaneously without having to change hose connections or instrument valve settings. Both models feature a backlit display and operate on four alkaline or NiMH rechargeable batteries.
The HM680 can also display volumetric flow when a Cv (Kv) factor is programmed. Up to 100 Cv (Kv) factors can be entered. In addition, the HM680 can calculate brake power, heat flow, Cv (Kv) factors and impeller sizing. Up to 1,000 data points can be stored to memory for later recall or downloaded to a PC using CompuDatTM USB software and USB interface cable.

Features

Measure and display high side, low side, and differential pressure simultaneously from 0 to 300 psi (0 to 2068 kPa)
Robust, splash-proof case
Calculates flow using valve manufacturers’ Cv (Kv) factors
Calculates heat flow, impeller diameter, and brake power

Applications

Test and balance heating and cooling systems
Check pump performance

HM670 kit includes hard 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, and power cord. HM680 kit includes all items in HM670 kit, plus a temperature probe, CompuDat USB downloading software, and USB interface cable.

Specification

Pressure
Differential Pressure	0 to 300 psi (0 to 2068 kPa)
Gauge Pressure	0 to 300 psi (0 to 2068 kPa)
Resolution (best)	0.001 psi (0.01 kPa)
Accuracy1	±1% of reading or .072 psi (0.5 kPa), whichever is greater
Units	in. H2O, ft H2O, in. Hg, kPa, mm Hg, m H2O, psi, bar
Connection	¼ in. (6.25 mm) 37° Flare Fitting, Male
Temperature
Operating (electronics)	40 to 100°F (4 to 38°C)
Storage	0 to 140°F (-18 to 60°C)
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
Range2	0 to 2271 m3/h, 0 to 9,999 USGPM (0 to 631 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

Statistics	min, max, average, sum up to 1000 readings (HM680 only)
Data Storage	1000 combined readings, 100 Test IDs (HM680 only)
Logging Interval (HM680 only)	User selectable, 5 to 3600 seconds
Averaging Interval (HM680 only)	User selectable, 1 to 30 seconds
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
1 Accuracy statement applies from 0 to 250 psi (0 to 1724 kPa) 2 The flow reading is a calculated value determined from the measured Differential pressure, user entered valve flow coefficient (Kv or Cv), and fluid specific gravity

Models