LEX1 Highly Precise Digital Manometer Riels0 pages

LEX 1

DIGITAL
MANOMETER

PRESSURE
CONTROLS

Highly Precise Digital Manometer Precision (0,01 % FS*)
RS485 BUS Interface
LEX1 is a micro-processor controlled, accurate and versatile digital pressure measuring
instrument for calibration and testing purposes with 0,05 %FS standard accuracy.
Option for precision 0,01% available as extra feature. Via the RS485 Bus Interface,
communication with up to 128 connected instrument can take place.
The pressure is measured twice per second and displayed.
The top display indicates the actual pressure, the bottom display shows the Max. or Min.
pressure.
ATEX / IECEx: LEX1 devices which are marked with “LEX1 Ei” are intrinsically safe for use in
hazardous areas (by approval for both ATEX and IECEx standards).

Tutti i dati ed i contenuti di questa scheda sono di proprietà esclusiva di Riels Instruments

Function
LEX1 has two operating keys.The left key is to turn the instrument on, to select the functions
and the pressure units. The right key executes the selected function resp. unit or serves to
display the Max. and Min. value.
The instrument has the following functions
RESET With the RESET-function, the Max. and Min.value is set to the actual pressure value.
ZERO Using the Zero-function will set any prevailing pressure to be the new zero point
reference.
CONT The instrument turns off 15 min. after the last key function.
Activating CONT(Continuous) deactivates this automatic turn-off.
UNITS All standard instruments are calibrated in bar.
The pressure can be indicated in 13 different units.
Scope of Delivery: Carrying case and 5-point calibration certificate.

LEX1 with piezo-resistive
pressure sensor

Optional accessories
- Carrying bag, protective rubber covering
- Iinterface converter K-114A

SPECIFICATIONS

Number of Digits of the LCD Display

5 digit

Measuring Rate (Display LCD)
Measuring Rate via Serial Interface

2 x per second
Pressure up to 15 x per second

Storage / Operating Temperature
Medium Temperature Pressure Sensor

-10…60°C / 0…50°C
-20…80°C, others on request
LEX 1 Ei max. 60°C

Compensated Temperature Range
Battery

0…50°C

Battery Life

approx. 2’000 hours continuous operation

Pressure Connection

G1/4” (other threads on request)

Bus Interface (****)

RS485 (RIELS bus protocol)

Electrical Connection (****)

External supply and RS485 communication via
Fischer D103A054, flange socket fits with
PC-converter cable K-114A (USB to RS485)

External Supply (****)

* Accuracy and Precision

8…28 VDC

Temperature Measurement

Accuracy typ. 0,5°C

Material in Contact with Media

Stainless Steel (AISI 316L), Viton® O-ring.
In addition with LEX1 capacitive:
gold plated ceramic diaphragm, Nitril O-ring

Protection

IP65

Diameter x Height x Depth (approx.)

Weight (approx.)

LEX1 with capacitive
pressure sensor

3 V battery, Typ CR 2430

LEX1 piezoresistive: 76x118x55 mm
LEX1 capacitive: 76x148x55 mm
LEX1 piezoresistive: 300 g.
LEX1 capacitive 335 g.

(****) In the Ex-Zone, the LEX1 Ei gauges are not allowed to be supplied externally, nor can they be connected via the
RS485 interface.

Riels Instruments Srl

+39 049 8961771

“Accuracy” is an absolute term, “Precision” a relative term.
Dead weight testers are primary standards for pressure,
where the pressure is defined by the primary values of
mass, length and time.
Highest class primary standards in national laboratories
indicate the uncertaintyof their pressure references with
70 to 90 ppM or close to 0,01%.
Commercial dead weight testers as used in our facilities
to calibrate the transmitters and manometers indicate an
uncertainty or accuracy of 0,025%.
Below these levels, RIELS use the expression “Precision” as
the ability of a pressure transmitter or manometer to be
at each pressure point within 0,01 %FS relative to these
commercial standards.
The manometer’s full-scale output can be set up to match
any standard of your choice by correcting the gain with a
calibration software.

+39 049 717368 www.riels.it info@riels.it