Instruction Manual

Series 490 Digital Manometers are
versatile, hand-held, battery operated
manometers available in several basic ranges
from 0-15.0 psi up to 0-500 psi. All models
measure either positive, negative or
differential pressures with ±0.5% of full scale
accuracy. You can select from up to seven
common English and metric pressure units so
conversions are not necessary. A memory
function allows storage of up to 40 readings
for later recall and a backlight provides
auxiliary lighting for hard-to-see locations.
Also standard are a hold feature plus both
visual and audible overpressure alarms.
Series 490 Wet/Wet Handheld Digital Manometer
Specifications - Installation & Operating Instructions
Bulletin D-24
DWYER INSTRUMENTS, INC. Phone: [phone] www.dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: [phone] e-mail: [e-mail]
SPECIFICATIONS
Service: Compatible, non-combustible
gases & liquids.
Wetted Materials: Type 316L SS.
Accuracy: ±0.5% F.S., 60 to 78°F (15.6 to
25.6°C); ±1.5% F.S. from 32 to 60°F and 78
to 104°F (0 to 15.6°C and 25.6 to 40°C).
Pressure Hysteresis: ±0.1% of full scale.
Pressure Limits: See chart.
Temperature Limits: 32 to 104°F
(0 to 40°C).
Storage Temperature Limits: -4 to 176°F
(-20 to 80°C).
Display: 4-digit LCD (.425 H x .234 W
digits).
Resolution: See chart.
Power Requirements: 9 volt alkaline
battery. Battery included but not connected.
Weight: 14.1 oz (400 g).
Connections: Two 1/8˝ (3.18 mm) female
NPT.
Agency Approvals: CE.
Model
Number
490-1
490-2
490-3
490-4
490-5
490-6
English
Range
0-15.00 psi
0-30.00 psi
0-50.00 psi
0-100.0 psi
0-500.0 psi
0-200.0 psi
Metric
Range
0-103.4 kPa
0-206.9 kPa
0-344.8 kPa
0-689.5 kPa
0-3448 kPa
0-1379 kPa
Maximum
Pressure
30 psi (2.7 bar)
60 psi (4.13 bar)
100 psi (6.89 bar)
200 psi (13.78 bar)
1000 psi (68.9 bar)
400 psi (27.57 bar)
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