Extech 406800 Operating Manual

User's Guide

Differential Pressure Manometer
Model 406800

Introduction

Congratulations on your purchase of the Extech 406800 Differential Pressure Manometer.
This device measures Gauge/Differential Pressure from 0 to 138.3 inH
It features 11 selectable units of measure: inH

O, cmH2O, kg/cm2. Additional features include: Data Hold, Auto Power Off disabled,

ftH

2

O, psi, bar, mbar, kPa, inHg, mmHg, oz/in2,

2

and an RS-232 for capturing readings to a PC using optional software (407752). Careful
use of this meter will provide years of reliable service.

O (inches of water).

2

Specifications

Function Range Resolution
inH2O ±138.3inH2O 0.1inH2O
psi ±5.000psi 0.001psi
bar ±0.344bar 0.001bar
mbar ±344.7mbar 0.1mbar
kPa ±34.47kPa 0.01kPa
inHg ±10.18inHg 0.01inHg
mmHg ±258.5mmHg 0.1mmHg
ozin2 ±80.00oz/in2 0.01oz/in2
ftH2O ±11.53ftH2O 0.01ftH2O
cmH2O ±350.1cmH2O 0.1cmH2O
kgcm2 ±0.351kg/cm

Display Dual LCD
Accuracy ±0.3%FS
Repeatability ±0.2% to 0.5% FS
Linearity/Hysteresis ±0.3%FS
Combined Accuracy ±1.1%FS (+5 to -4psi) (-4 to -5psi unspecified)
Connectors Two metal 4.8mm ports for flexible tubing
Maximum Pressure 20psi
Response Time 0.5 seconds typical
Compatibility Air or Non-Corrosive Gases
Low Battery Indicator Yes
Overrange Indicator Err.1
Underrange Indicator Err.2
Compensated Temperature Range 32 to 122
Operating Conditions 32 to 122
Storage Conditions -4 to 140
Power Supply 1 x 9V battery
Dimensions / Weight 7.1 x 2.8 x 1.1” (182 x 72 x 30mm); 7.7 oz. (220g)

Note: Exceeding maximum pressure will cause sensor damage.

2

0.001kg/cm2

º

F (0 to 50ºC)

º

F (0 to 50ºC); < 80% RH non-condensing

º

F (-20 to 60ºC); <80% RH non-condensing

406800 V2.1 11/06 2