Alnor HM680, Owner'S Manual, Page: 39 / 40

33
Specifications*
Range
Differential Pressure ......... 0 to 300 psi (0 to 2068 kPa)
Gauge Pressure................ 0 to 300 psi (0 to 2068 kPa)
Flow
1....................................................
0 to 9999 USGPM (0 to 631 l/s, 0 to 2271 m
3
/h)
Operating Temperature .... 40 to 100°F (4 to 38°C) electronics
Storage Temperature ....... 0 to 140°F (-18 to 60°C)
Temperature Probe .......... -40 to 250°F (-40 to 121 °C)
Resolution
Pressure (best) ................. 0.001 psi (0.01 kPa)
Flow (best) ........................ 0.0001 USGPM (0.00001 l/s)
Temperature ..................... 0.1°F (0.1°C)
Accuracy
Pressure
2
.......................... ±1% of reading or .036 psi (0.25 kPa), whichever is greater
Flow .................................. per pressure ac valve deviation
Temperature ..................... ±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
Pressure ........................... psi, in. H
2
O, ft H
2
O, kPa, mm Hg, in. Hg, m H
2
O, bar
Flow .................................. USGPM, UKGPM, m
3
/h, l/s, l/m
Temperature ..................... degrees F, degrees C
Statistics
................................ min, max, average, sum up to 1000 readings
Data Storage
.......................... 100 Test IDs, 1000 combined readings, time and date stamped
Logging Interval
.................... user selectable (5 to 3600 seconds)
Averaging Interval
................. user selectable (1 to 30 seconds)
Display
.................................... dot matrix LCD with backlight
Dimensions
(meter only)........ 11.1 in. × 4.7 in. × 3.5 in. (28.2 cm × 11.9 cm × 8.8 cm)
Pressure Connection
............ ¼” 37° Flare Fitting, Male
Weight with Batteries
............ 2.65 lb. (1.20 kg)
Power Requirements
............ four AA-size cells, alkaline or rechargeable NiMH (included), or AC
adapter (included) 7.5 VDC, 1.6 A, regulated
Battery Life
3
........................... minimum of 12 hours with backlight on
minimum of 18 hours with backlight off
Recharge Time
...................... 4 hours (internal charger)
Warranty
................................. 2 year factory warranty
*Specifications are subject to change without notice.
1
The flow reading is a calculated value determined from the measured Differential pressure, user entered valve flow coefficient
(Cv or Kv), and fluid specific gravity.
2
Accuracy statement applies from 0–250 psi (0–1724 kPa).
3
The minimum battery life stated will occur after the NiMH batteries have been recharged 2-3 times after initial charge.