Setra 470 Data sheet

Models 370 & 470

etra Models 370 and
470 offer extremely high

S

accuracy and unmatched
stability in a digital output
configuration. Environmen­ta l mo nitoring and te s t &
measurement systems around
the world rely on Setra's
experience in barometric pres­sure me a s u r e m e n t instru­menta tion, as well as high
ac curac y measu rements of
higher pressures. Both mod­els utilize Setra's unique SE­TRACERAM™ sensor, w hich
is combined with advanced
microprocessor based circuitry
and sophisticated firmware
to provide system accuracy to
better than ± 0.02% full scale.

The Model 370 Digital Pressure
Gauge is an extremely versa­tile instrument. Pressure and
altitude data is displayed on a 6
digit LCD and is also accessible
through a bidirectional RS-232
port. A numeric key pad is
provided for easy access to
engineering unit conversions,
min/max tracking, entry of
Hi/Lo alarm setpoints, nonlin­ear functions and calibration
procedures. The 370 is also
av ailab le wit h an optional
rechargeable battery pack to
bring lab accuracy to the fi eld.

The Model 470 is function­ally the same as the 370. It is
intended fo r a pplications
which do not require local
display of pr essure or key
pad access to commands. The
470's solid stability, reliability
and versatility make it the fi rst
choice for weather observa­tion systems worldwide. Both
units are programmable for
continuous, interval or on­de ma nd pr in ti n g at an
adjustable (300-9600) baud
rate.

U.S. Patent No. 4168518

Models 370 and 470 Specifi cations

Type of Pressure Pressure Range Readout or Report Altitude Range

1

Barometric 600 to 1100 hPa/mb 600.00 to 1100.00 -1000 to 13,800 ft.

800 to 1100 hPa/mb 800.00 to 1100.00 -1000 to 6,400 ft.

Absolute 0 to 10 psia 10.0000 10,300 to 100,000 ft.

0 to 20 psia 20.0000 -1000 to 100,000 ft.

0 to 50 psia 50.0000 -1000 to 100,000 ft.

0 to 100 psia 100.000 -1000 to 100,000 ft.

Proof Pressure: 150% of full scale pressure range

Pressure Media: Clean dry air or other gases (non-condensable)

Accuracy

± 0.02% FS

3

at 70°F (21°C)

Non-Linearity ± 0.012%FS (End Point)

Hysteresis 0.010% FS

Non-Repeatability 0.010% FS

Thermal Effects

4

Compensated Range °F (°C) +32 to +110 (0 to +45)

Zero Shift %FS/°F (°C) 0.002 (0.004)

Span Shift %FS/°F (°C) 0.001 (0.002)

Altitude Resolution 1 ft. (4 ft. for 100 psi range)

Stability 0.005% FS, 24 hours

0.02% FS, 30 days

0.05% FS, 1 year

Notes: 1. Altitude is calculated using a polynomial expression, which is derived from the standard atmosphere curve, and corrected to sea level by the methods outlined in

“Smithsonian Meteorological Tables, Vol. 114". Ranges greater than 20 psia not recommended for altimeter certifi cation.

2. RSS of Non-Linearity, Non-Repeatability and Hysteresis.

3. FS = 300 hPa/mb for 800-1100 hPa/mb range; 500 hPa/mb for 600-1100 hPa/mb range.

4. Unit calibrated at 70

o

F. Maximum thermal error is computed from this datum.

Specifi cations are subject to change without notice.

Model 370: 110/220 VAC (-10% to +20%), 50/60 Hz., optional 12

VDC internal rechargeable battery pack (approx. 8 hours between

charges). Approximately 4 watts power consumption.

Model 470 5 VDC ±1%, 70 mA max.

Model 370

Display 6 digit Liquid Crystal Display (LCD) with

annunciators for pressure/altitude engineering

units (PSI, mbar, hPa, mmHg, in.Hg, mmH

2

O,

in.H

2

O, ft, m, units), HI/LO ALARM, pressure

signal stability (O.K.) and barometric pressure

corrected to sea level

(SEA LEVEL).

Digital Output Bidirectional RS-232 interface. All display data

can be transmitted on the interface (Model

370) and all keyboard functions and commands

can be duplicated using a remote terminal or

keyboard.

Model 470

Digital Output Pressure data for the Model 470 is accessible

through the Bidirectional RS-232 I/O port,

which is user programmable for continuous,

interval or on-demand printing at an adjustable

The same functions are available on the Model

Pressure Ranges

Applications

● Automatic Weather
Reporting Systems

● Pressure Transfer Standard

● Altimeter Calibration

Recertifi cation

● Lab or Production Process
Monitoring

Performance Data

Output Data

● Altitude Chambers

Operating Power

Features

■ ± 0.02% Full Scale Accuracy

■ High Resolution 6 Digit LCD

Display for Pressure or Altitude
Monitoring (M370)

■ Bidirectional RS-232 Digital
Communications I/O Port

■ Engineering Unit

Conversions for Pressure
and Altitude

■ Digital Altimeter Setting
Indicator (DASI) and Corrected
Altimeter Mode

■ Programmable Non-Linear
Functions

■ Meets CE Conformance

Standards

When it comes to a product to rely
on - choose the Model 370/470.
When it comes to a company to
trust - choose Setra

800-257-3872

Toll Free: 800-257-3872; Fax: [phone]; email: [e-mail]

Excitation DB-9S, (9 Pin D-Subminiature Female):

Pin: 3 GRD, 9 + 5 VDC

Communications DB-9S, (9 Pin D-Subminiature Male):

Pin: 2 TXD, 3 RXD, 5GRD

The calibration of this product is NIST traceable.

Elev: + 120 feet
Max: + 15.552 PSI A
Min:

 + 11.793 PSI A
Hi A: + 16.000 PSI A
Lo A: + 11.000 PSI A

600. sec/reading

14.595 PSI A

14.596 PSI A

14.598 PSI A

Digital Interface

Model 370 Physical Description

Available Options

Outline Drawings

Model 370

Model 470 Physical Description

Ordering Information

Model 470