Alnor
®
Models EBT720/EBT721 and AIRFLOW™ Instruments
Models PH720/PH721
Specifications
*
*
Specifications are subject to change without notice.
Range
Differential pressure ... ±15 in. H
2
O (3735 pa); 150 in.
H
2
O maximum safe operating
pressure
Absolute pressure ...... 15 to 40 in. Hg (356 to
1016 mm
Hg)
Velocity ...................... 25 to 8,000 ft/min (0.125 to
40 m/s) pitot probes;
25 to 5,000 ft/min (0.125 to
25 m/s) air flow probe;
25 to 2,500 ft/min (0.125 to
12.5 m/s) velocity matrix
Volume ...................... 25 to 2,500 ft
3
/min (42 to
4250 m
3
/h) capture hood
Temperature .............. -40 to 250°F (-40 to 121°C)
temperature probe
14 to 140°F (-10 to 60°C)
temperature/RH probe
40 to 140°F (4.4 to 60°C)
operating (electronics)
Storage temperature ... -4 to 160°F (-20 to 71°C)
Rh .............................. 0 to 95% RH temperature/RH
probe
Resolution
Pressure .................... 0.00001 in. H
2
O (0.001 pa) static
and differential;
0.01 in. Hg (1 mm Hg) absolute
Velocity ...................... 1 ft/min (.01 m/s)
Volume ...................... 1 ft
3
/min (1 m
3
/h)
Rh .............................. 0.1% RH
Temperature .............. 0.1°F (0.1°C)
Accuracy
Pressure .................... ±2% of reading ±0.001 in. H
2
O
(0.25 pa) static and differential;
±2% of reading absolute
Velocity ...................... ±3% of reading ±7 ft/min
(0.04 m/s) >50 ft/min (>0.25 m/s)
Volume ...................... ±3% of reading ±7 ft
3
/min
(12 m
3
/h) >50 ft
3
/min (>85 m
3
/h)
Rh .............................. ±3% RH
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 .................... in. H
2
O, pa, hPa, kPa, mm Hg,
in. Hg, cm Hg, mm H
2
O, cm H
2
O
Velocity ...................... ft/min, m/s
Volume ...................... ft
3
/min, m
3
/h, m
3
/min, l/s
Temperature .............. degrees F, degrees C
Statistics ...................... min, max, average up to 1000
readings
Data Storage ................ 1000 readings, time and date
stamped
Logging Interval .......... user selectable (10 to 600
seconds)
Response Time ............ 2 to 8 seconds
Display ......................... 6 digit, 0.75 in. character height,
multi-line, sectored, multiple
symbolic icons, high-contrast
backlit LCD
Dimensions
(manometer only) ............. 7.4 in. × 4.5 in. × 2.3 in.
(18.8 cm × 11.4 cm × 5.8 cm)
Pressure connection ... ¼ in. OD straight ports for use
with 3/16 in. ID flexible tubing
Weight with batteries
.. E
BT720/PH720 17 oz (0.5 kg);
EBT721/PH721 7.4 lb (3.4 kg)
Power requirements .... four AA-size cells, rechargeable
NiMH (included) or alkaline, or
AC adapter (included), 7.5 VDC,
1.6 A, regulated
Battery life .................... minimum of 12 hours typical
Recharge time.............. 1 hour (external charger); 4 hours
(internal charger)
Hood sizes available
Standard .................... 2 ft × 2 ft (610 mm × 610 mm)
Optional ........................ 2 ft × 4 ft (610 mm × 1220 mm);
1 ft × 4 ft (305 mm × 1220 mm);
1 ft × 5 ft (305 mm × 1525 mm);
3 ft × 3 ft (915 mm × 915 mm)
RS232C output .............. ASCII character codes;
1200, 2400, 4800, 9600, 19200
baud rate (selectable)
no parity
8 data bits
1 stop bit
no handshaking
Warranty ....................... 2 year factory warranty
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