Extech 407910 Operating Manual

User's Guide

Heavy Duty
Differential Pressure Manometer

Model 407910

Warranty

EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects

in parts and workmanship for one year from date of shipment (a six month limited warranty
applies to sensors and cables). If it should become necessary to return the instrument for
service during or beyond the warranty period, contact the Customer Service Department at
[phone] ext. 210 for authorization or visit our website www.extech.com for contact
information. A Return Authorization (RA) number must be issued before any product is
returned to Extech. The sender is responsible for shipping charges, freight, insurance and
proper packaging to prevent damage in transit. This warranty does not apply to defects
resulting from action of the user such as misuse, improper wiring, operation outside of
specification, improper maintenance or repair, or unauthorized modification. Extech
specifically disclaims any implied warranties or merchantability or fitness for a specific
purpose and will not be liable for any direct, indirect, incidental or consequential damages.
Extech's total liability is limited to repair or replacement of the product. The warranty set
forth above is inclusive and no other warranty, whether written or oral, is expressed or
implied.

Introduction

Congratulations on your purchase of the Extech Manometer Model 407910. This device
has a differential input with convenient quick-disconnect fittings. Eight units of measure are
selectable by front panel pushbutton. Advanced features include Data hold, MAX/MIN
record/recall, and RS-232 PC interface. Properly used, this device will provide years of
reliable service.

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Model 407910 - Version 2.0 - March 2005

Specifications

General Specifications

Circuit Custom one-chip LSI microprocessor circuit
Display 0.6" (16mm) 2000 count LCD with function indicators
Units of Measure mBAR, psi, kg/cm2, mm Hg, inches Hg, meter H2O, inches H2O

Input circuit Differential inputs (P1 and P2)
Data Hold Freezes displayed reading
Sensor Built-in piezoelectric sensors
Zero Adjust Front panel push-button
Sample rate 0.8 sec. (approx.)
Compatibility Air or non-corrosive and non-ionized gas
Auto Power OFF Meter turns off after approx. 10 minutes to conserve energy
Data Output RS-232 PC serial interface
Ambient conditions 32 to 122oF (0 to 50oC); < 80% RH
Battery power 9V alkaline battery
Power Consumption 6mA DC (approx.)
Dimensions 7.1 x 2.8 x1.3" (180 x 72 x 32 mm)
Weight 0.76 lbs (345 g)
Accessories Quick-disconnect fittings (2), rubber jacket, and 9V battery

Range Specifications

Range/Units (Max.) Resolution

± 2000 mbar 1
± 29 psi 0.02
± 2.040 Kg/cm2 0.001
± 1500 mm Hg 1
± 59.05 inches Hg 0.05
± 20.40 meters H2O 0.01
± 802 inches H2O 0.5
± 1.974 atmospheres 0.001

and Atmospheres

Accuracy

± 2% full scale @ 23±5
Note: Accuracy includes linearity,

hysteresis and repeatability effects

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Model 407910 - Version 2.0 - March 2005