Ref: Model 711-2 et 716-2

High-precision geotechnical dual-axis tiltmeter

High-precision biaxial electrolytic tilt measurement
Measuring ranges: ±0.046°, ±0.46°, ±0.8°, ±8°, ±4°, ±70°.
Resolution: 0.1 / 1 or 10 µrad depending on measurement range
Output signal: ±8VDC, ±16VDC or RS-232/485
Low-pass filter - 0.1 Hz
Floor (711) or wall (716) platform mounting
Temperature output
Operating temperature: -25 to +70°C
Power supply: ±11 to ±15 VDC or 7-29VDC
Dimensions: 15 x 15 x 10 cm
Cable length 3m included
IP65 version

High-precision tiltmeter for geotechnical applications

A711 and A716 tiltmeters are tilt measurement platforms for geotechnical applications. Each of them incorporates two high-precision electrolytic sensing elements mounted perpendicular to each other, enabling the detection of minute movements on the X and Y axes. Resolution ranges from 0.1 to 10 µrad, depending on the measurement range. 6 measurement ranges are available:±0.046°, ±0.46°, ±0.8°, ±8°, ±4°, ±70°.

Analog or digital output

The output signal of 711 and 716 tiltmeters is either analog (±8 VDC (unipolar), ±16 VDC (differential)) or digital (RS-232/485). On analog models, 2 switches allow selection of gain and filter constant from 2 pre-defined values. On digital models, configuration of filter, zero gain, serial communication and sampling frequency is done via firmware. Data is recorded on the fly (serial link) or on internal memory (540 Kb capacity, i.e. 22,000 values).

IP65 design

With IP65 grade, the A711(4X) tilt measurement platform is designed for geotechnical applications with steam or corrosive environments. Technical specifications otherwise remain identical to models A711 and A716.

Specifications

	A-711-2A ou A-716-2A	A-711-2B ou A-716-2B	A-711-2A(4X)	A-711-2B(4X)	A-711-2C(4X)	D711-A	D711-B	D711-C
Measuring range	± 0,046° ou ± 0,46°	±0,8° ou ±8°	± 8000 µrad (± 0,46°)	± 4°	± 70°	± 0,5°	± 5°	± 70°
resolution max	0,1 µrad	1 µrad	1 µrad	1 µrad	10 µrad	1 µrad	10 µrad	21 µrad
repeatability	1 µrad	2 µrad	2 µrad	2 µrad	20 µrad	4 µrad	15 µrad	350 µrad
Non-linearity	0,2 ou 2%	0,2 ou 1,5%	1%	5%	4%	0,40%	0,10%	0,10%
Signal output	±8 VDC ou ±16 VDC	±8 VDC ou ±16 VDC	±8 VDC ou ±16 VDC	±8 VDC ou ±16 VDC	±8 VDC ou ±16 VDC	RS-232/422	RS-232/422	RS-232/422
Voltage supply	±11 to ±15 VDC	±11 to ±15 VDC	±11 to ±15 VDC	±11 to ±15 VDC	±11 to ±15 VDC	7-28VDC	7-28VDC	7-28VDC
Installation	711: horizontale, 716: verticale	711: horizontale, 716: verticale	horizontale	horizontale	horizontale	horizontale	horizontale	horizontale
thermal drift on zero	±3 μrad/°C	±0.001°/°C	±4 μrad/°C	±4 μrad/°C	±0,004°/°C	±3,5 μrad/°C	±3,5 μrad/°C	±0.004°/°C
thermal drift on sensitivity	0.05%/°C	0.05%/°C	±0.04%/°C	±0.04%/°C	±0.13%/°C	0.02%/°C	0.02%/°C	0.05%/°C
Remarks			IP65	IP65	IP65

Installation

Platform 711 is floor-mounted, platform 716 wall-mounted. Fastening and leveling are done with screws. 3m cable included. Supply voltage is between 11 and 15 VDC for analog models, and 7 to 29 VDC for digital versions.