Dwyer Instruments 478A Operating Manual

MODEL

MANOMETER

DIFFERENTIAL

PRESSURE

478A

MADE IN

THE U.S.A.

ACCURACY

±1.5% FS

RUGGED

ALUMINUM

METAL

HOUSING

ONE-TOUCH™ CALIBRATION

TECHNOLOGY

MIN./MAX.

READING

RECALL

SPECIFICATIONS Service: Air and compatible gases. Wetted Materials: Consult factory. Accuracy: ±1.5% full-scale* at 72°F (22.2°C). Includes linearity and repeatability. Pressure Hysteresis: ±0.1% of FS. Pressure Limits: 5 psig (.34 bar). Temperature Limits: 0 to 140°F (-17.8 to 60°C). Compensated Temperature Limits: 32 to 104°F (0 to 40°C). Thermal Effect: 0.05% FS/°F. Display: 4 digit LCD (.425˝H x .234˝W digits). Power Requirements: 9 V alkaline battery, installed non-functional, user replaceable. Process Connections: Two barbed connections for use with 3/16˝ or 1/4˝ ID tubing. Weight: 10.8 oz (306 g). Agency Approvals: CE.

*When subjected to electromagnetic interference, at 837 MHz (10 V/m) accuracy is 5.0% full scale.

TE-478A

MODEL CHART

Model Range in w.c.

478A-0

-4.00 to 4.00

478A-1

-60.0 to 60.0 .1495

Available Pressure Units Resolution

.1445

2.168

.294

4.41

0.996

14.95

4.00

60.0

7.47

112.1

9.96

149.5

101.6 1524

in w.c.

996 0.01

0.1

Max. Pressurebar psi in Hg kPa in w.c. mm Hg mbar mm w.c Pa

5 psig 5 psig

OPERATING INSTRUCTIONS ON/OFF:

Press ON/OFF to toggle on and off. Press and hold ON/OFF for about 2 seconds to turn it off. Device will automatically shut off after 20 minutes if not used.

ZERO:

Vent both pressure ports to atmosphere. Press ZERO button until the LCD displays “---” then release it. UNITS: To change units, press both ON/OFF and ZERO buttons simultaneously.

HOLD READING:

Press HOLD to hold current reading. Press again to resume measurement.

MIN/MAX:

First button press displays MIN value. Second press displays MAX value. Third press returns to normal measurement. Reset MIN and MAX by pressing ON/OFF button when MIN or MAX is displayed.

BATTERY:

Remove retaining screws on end cap at base of instrument to replace battery when LOW BAT is displayed. Use 9 V alkaline battery

MN 1604, Eveready® 522, or equivalent.

Duracell

Eveready

is a registered trademark of Eveready Battery Company, Inc.

DWYER INSTRUMENTS, INC. • MICHIGAN CITY, IN 46360 email: info@dwyermail.com • http://www.dwyer-inst.com

is a registered trademark of The Gillette company.

443438-10 Rev. 4

Made in USA of U.S. & Imported Parts