Jewell Instruments D820 Specifications
Model D820 Shallow Water Digital Tiltmeter
High Gain
Standard Gain
Wide Angle
Angular Range
±0.5°
±3°
±50°
Resolution
<0.0001
0.0001
0.002
Repeatability
0.0003
0.0003
0.004
Non-Linearity
0.1%
0.1%
0.1%
Kz Temp Coefficient
±0.0002 /°C (typical)
±0.002 /°C (typical)
Ks Temp Coefficient
0.04%/°C (typical)
<0.1 %/°C (typical)
Channels
Tilt, Temperature, Serial No.
Time Constant
0.15 sec
Output
RS232, RS422
Output Format
NMEA XDR, Trimble TCM, Ashtec compatible, Simple (default: X, Y, Temp., S/N)
Baud Rate
9600 (default), 19200, 28800, 57600, 115200, 130400
Power
7-28 VDC @ 30mA, 250 mV ripple max, reverse polarity protected
Environmental
-4° to +60°C operational, -30° to +100°C storage. Submersible to 200 meters (656.2 ft)
Mounting
Two no. 10 stainless steel mounting screws.
Materials
316 SS
Dimensions & Weight
92.1 x 112.4 x 61 mm, 1.6 kg
Housing Connector
6-pin bulkhead, male plug
Mating Cable
6-conductor unshielded, 20AWG female receptacle with locking sleeve, neoprene jacket, 24”
The model D820 Shallow Water is a highprecision submersible tiltmeter for use in fresh
and salt water applications with RS232 or RS422
digital output. Using an absolute gravity
referenced electrolytic sensor, the D820
delivers superior measurement accuracy with
virtually no long-term drift. High-gain units are
sensitive to <0.0017 mm/m or better. All units
are rated to 200 meters (656.2 ft) waterproof
for advanced protection from the elements. Use
the D820 “Shallow Water” for structural
monitoring, angle measurement and control,
platform leveling and more.
How to Order:
Page 1 of 3
Jewell Instruments LLC 850 Perimeter Road, Manchester, NH 03103
sales@jewellinstruments.com • www.jewellinstruments.com • Tel (800) 227-5955
L00264 Rev. C
Model D820 Shallow Water Digital Tiltmeter
Wiring/Pin Out – RS232
Wiring/Pin Out – RS422
Pin
Assignment
Color
Pin
Assignment
Color
1
Pwr Gnd
Black
1 Pwr Gnd
Black
2
N/C
White
2 Tx-
White
3
Pwr
Red 3
Pwr
Red 4 RxD
Green
4 TX+
Green
5
N/C
Orange
5 RX-
Orange
6
TxD
Blue
6 RX+
Blue
UNITS: [mm]
IN
Dimensions:
Page 2 of 3
Jewell Instruments LLC 850 Perimeter Road, Manchester, NH 03103
sales@jewellinstruments.com • www.jewellinstruments.com • Tel (800) 227-5955
L00264 Rev. C
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