TSI Alnor HM685 Specifications

HYDRONIC MANOMETERS

MODELS HM675, HM685

The HM675 and HM685 Hydronic Manometers are used to balance

hydronic heating and cooling systems, check pump performance and to set

balancing valves. They can measure and display dierential, high side and

low side pressure simultaneously, without having to change hose

connections or instrument valve settings. Each model features a backlit

display and operates on four alkaline or NiMH rechargeable batteries.

Features and Benets

+ Measure and display high side, low side, and dierential

pressure simultaneously

+ Robust, splash-proof case

+ Inputs for two temperature probes

Features and Benets (HM685 only)

+ Calculates ow using valve manufacturers’ Cv (Kv) factors

[up to 100 Cv (Kv) can be entered]

+ Calculates heat ow, impeller diameter and brake power

+ Stores up to 4,000 data points to memory for later recall/download

to a PC using CompuDat™ USB Software and USB interface cable

Intuitive menu structure for easy navigation and instrument set up

Applications

+ Test and balance heating and cooling systems

+ Check pump performance

+ Set balancing valves

HM675 kit includes hard carrying case, (2) 6.7 ft x ¼-in.

(2 m x 6 mm) hoses with shut-o valves, (2) B&G readout probes, (2)

P/T gauge adapter probes, and power cord.

HM685 kit includes all items in HM675 kit, plus a temperature probe,

CompuDat USB downloading software, and USB

interface cable.

UNDERSTANDING, ACCELERATED

SPECIFICATIONS

HYDRONIC MANOMETERS MODELS HM675 AND HM685

Pressure

Dierential Range -300 to 300 psi (-2,068 to 2,068 kPa) Gauge Range -20 to 300 psi (-138 to 2,068 kPa) (-40 to 610 in. Hg) Resolution (best) 0.001 psi (0.01 kPa) (0.01 in. Hg) Accuracy1 ±1% of reading plus .072 psi (0.5 kPa) (0.15 in. Hg) Units m H2O, bar

psi, in. H2O, ft H2O, kPa, mm Hg, in. Hg,

Pressure Connection ¼” 37• are tting, 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 (immersion) -40 to 250°F (-40 to 121 °C) Resolution 0.1°F (0.1°C) Accuracy ±0.5% of reading +1.2°F (0.7 °C) Units °F, °C

Flow (HM685 Only)

Range2 -22,712 to 22,271 m3/h, -99,999 to 99,999 USGPM (-6,309 to 6,309 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

User selectable (1, 5, 10, 20, and 30 seconds)

Product feature comparison HM675 HM685

Dierential, high side, and low side pressures displayed simultaneously Reads in in. H2O, ft H2O, psi, in. Hg, m H2O, kPa, mm Hg, bar Performs ow calculations

Downloading software and USB cable

Temperature probe

Hard carrying case

Certicate of Calibration

Unique Calculations menu for determining:

Brake Power

Heat ow

Calculate Cv/Kv

Pump law impeller diameter

Pump law delta P

Pump law brake power

+ +

optional +

+ +

HM675 HM685

Statistics (HM685 only) min, max, average, sum up to 4,000 readings

Data Storage (HM685 only)

4,000 combined readings, 100 Test IDs

Logging Interval (HM685 only) User selectable (1 to 3,600 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

Accuracy statement applies from -15 to 250 psi (-103 to 1,724 kPa)

The ow reading is a calculated value determined from the measured Dierential

pressure, user entered valve ow coecient (Kv or Cv), and uid specic gravity

Specications subject to change without notice.

UNDERSTANDING, ACCELERATED

TSI Incorporated

USA Tel: +1 800 874 2811 UK Tel: +44 149 4 459200 France Tel: +33 1 41 19 21 99 Germany Tel: +49 241 523030

Printed in U.S.A.

- Visit our website www.tsi.com for more information.

India Tel: +91 80 67877200 China Tel: +86 10 8219 7688 Singapore Tel: +65 6595 6388