Jewell Instruments ECS Specifications

ECS eCompass Series

Making Sense out of Motion…

ECS eCompass Series

Features

♦ High Accuracy

⇒ Heading within 0.5° or better
⇒ Tilt within 0.2° or better

♦ Wide Operating Range

⇒ ±42° Pitch and Roll
⇒ ±80° Dip angle range
⇒ Temperature -40° to 105°C
⇒ Local Hard Iron to ±1.5 Gauss

♦ Fast Response

⇒ 27.5 readings per second
⇒ Wake from standby in 50 msec

♦ Single Supply Operation

⇒ 6 to 45V unregulated DC or
⇒ 5V regulated DC

♦ Low Power

⇒ 25 mA operating
⇒ 10 mA sample
⇒ 2 mA standby

♦ Wide Selection of Output data

⇒ Heading, pitch, and roll
⇒ Magnetometer X, Y, and Z
⇒ Dip angle
⇒ Total, horizontal, and vertical magnetic field

strength

⇒ Horizontal X and Y magnetic field strength

♦ Choice of Interface

⇒ Full-duplex RS-232
⇒ Full-duplex RS-485

♦ In-System Configuration and Test

⇒ PC or laptop can be connected while unit

operates in-situ

⇒ Perform hard and soft iron calibration
⇒ Monitor outputs and change user-definable

settings

Strap down Electronic Compass

General Description

The ECS series represents the state-of-the-art in
magnetic compassing. It combines a precision 3­axis solid-state magnetometer and a rugged 2-axis
electrolytic tilt sensor to provide accurate heading
and tilt measurements over a wide range of
environmental conditions. The firmware and signal
processing algorithms have been refined and
improved over three prior generations of
compasses to deliver the ultimate in performance
from the available sensor data.

A key advantage of the ECS is its quick-connect,
external serial interface. While the compass is in­place, and without disconnecting system wiring, a
serial cable or available USB cable can be
temporarily connected via the RJ12-style modular
receptacle. This allows easy access during
installation for calibration and tuning. It also provides
a valuable diagnostic port and can be used for an
auxiliary read-out when needed. In situations where
a fixed installation
is not desirable,
the RJ12
connection can
be used
exclusively.

Among the host
of user definable
parameters is the
selection of
NMEA output data

Attitude Display in PC Software

and update rate;
operating mode as continuous or query-only; and
angle data in degrees, mils, radians, or 16-bit integer
(65536 counts per revolution). Compensation for
both hard and soft iron influences is built-in.

Jewell Instruments offers a development kit that
includes the compass, cable, and software. The ECS
is covered by a full one-year replacement warranty.

Rev C

Jewell Instruments LLC 850 Perimeter Road, Manchester, NH 03103

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

Page 1 of 7

ECS eCompass Series

Making Sense out of Motion…

Specifications

Heading Performance

Parameter Value Comments

Accuracy
Repeatability
Response time 36 msec Minimum, no filter
Dip Angle Range
Tilt Range
Update rate 27.5 per second

Pitch and Roll Performance

Parameter Value Comments

Accuracy
Repeatability
Range
Settling time 0.5 sec No damping

Electrical

Parameter Value Comments

Supply Current
25 mA operating typical
10 mA sample typical

2 mA standby typical

Supply Voltage (VDD)

Environmental

Parameter Value Comments

Operating Temp -40° to 105 °C

Storage Temperature -50° to 150 °C

Humidity 0 to 90% Non-condensing

± 0.5° rms Typical, Tilt < 35° Dip < 60°

± 0.3°

± 80°
± 42°

No filter

± 0.3°

± 0.20°

± 42°

Below values are the same color

Below values are the same color

6 – 45 Vdc unregulated 4.9 Vdc min

5.0 Vdc regulated

Factory calibrated

No filter

Rev C

Jewell Instruments LLC 850 Perimeter Road, Manchester, NH 03103

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

Page 2 of 7

ECS eCompass Series

Making Sense out of Motion…

Mechanical

Enclosure Material

PCB Size 1.8"W x 3.0"L x 0.6"H – H required for tilt sensor
PCB Mounting 4 #4 screws, 1.4" x 2.2" spacing
Weight

Connectors 8 pin, single-row, 0.1" friction header

6 pin RJ12 modular jack

Plastic Enclosure (P Option): (ABS) Flame Retardant UL94 VO

Aluminum Enclosure (A Option): Diecast Aluminum Alloy (Type 360.1)

Plastic Enclosure (P Option): 3.2 oz. (90.7 grams)

Aluminum Enclosure (A Option): 7.2 oz. (204.1 grams)

Interface

Signal type RS232 or RS485
Baud rate 2400, 4800, 9600, 19200, 38400 or 57600 bps
Character Format 8 data, no parity, 1 stop
Input Buffer Size 110 characters
Output Buffer Size 110 characters
Output Format NMEA 0183 and binary
Output Data Rate 1 to 1650 sentences per minute
Operating Modes Continuous or sample
Angle Units Degrees, mils, radians, 16-bit integer

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

How to Order

Rev C

Jewell Instruments LLC 850 Perimeter Road, Manchester, NH 03103

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

Page 3 of 7