Jewell Instruments A906 Specifications

Model A906 “Little Dipper” IPI

1

2

3

*Specifications subject to change without notice on account of continued development

; 1Resolution calculated a

t 1mV; 2Linear scale factor

The model A906 “Little Dipper” is a precision,
low-cost In-Place Inclinometer (IPI) system for
monitoring slopes, retaining walls,
embankments, ground subsidence and
settlement, and more. Units install easily in
standard inclinometer casings, or can be
grouted or buried directly into place. All A906
IPI’s are pressure rated to +72 psi. With ±3 VDC
output units also easily connect to any voltage
input datalogger. The A906 is configurable for
use for use in both vertical and horizontal
boreholes. Units ship standard with 3m cable
(specify additional cable length on order).

High-Gain Standard
Angular Range
Resolution
Repeatability
Scale Factor
Non-Linearity
Output ±3.0VDC
Channels X-tilt, Y-tilt, Temperature
Kz Coefficient (deg/C) ±5 arcsec/C (typical)
Ks Coefficient (%/C) ±0.03%/C (typical)
Time Constant 0.15 sec
Natural Frequency 10 Hz
Power +8 to +24 VDC; 7mA, 250 mV ripple max, reverse polarity protected
Environmental -25 to +70 C; Submersible to72psi (5 bar); 100% humidity (non-condensing)
Dimensions 231 x 39 mm (9.25 x 1.55 in.), 0.35kg (0.75 lb.)
Materials Cylindrical ABS housing, Delrin (guide fins)
Cable Multiconductor, PVC jacket, polypropylene insulation, overall shield, 0.2 in. (5mm) dia.

±12° ±30°

<0.005° <0.01°

0.01° 0.02°
4°/V

0.8% (full span) 1% (half span); 4% (full span)

10/V

calculated from BFSL through calibration curve; 3Linearity calculated as max % deviation from BFSL. 0.05% linearity achievable using a polynomial

Ordering Code: Pin-out/Wiring:

Jewell Instruments LLC 850 Perimeter Road, Manchester, NH 03103

[e-mail] • www.jewellinstruments.com • Tel [phone]

Color Function

Red V+

Black GND

Blue X-Out

Green Y-Out

Yellow Temp Out

L00182 Rev. B

Model A906 “Little Dipper” IPI

A906 “Little

Dipper

”

Installation Configurations

Sensor Module

with Guide Fins

with Universal Pivot

Little Dipper

Direct Burial Installation

Axis Configuration (Vertical Installations)

Little Dipper

Multiple-Point Installation

Little Dipper

Multiple-Interval Installation

Accessories:

Part No. Description

86816-04

86803-01

86801

86802

86818

70369

Set of 4 guide fins for 3.34 inch (85
mm) casing
Universal pivot assembly (order
guide fins separately)
Fiberglass connecting rod (specify
sensor spacing)
Hanger assembly
(vertical boreholes)
Tensioning weight
(vertical boreholes)
6-conductor cable
(specify total length on order)

Jewell Instruments LLC 850 Perimeter Road, Manchester, NH 03103

[e-mail] • www.jewellinstruments.com • Tel [phone]

L00182 Rev. B