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Model 820 Shallow Water Tiltmeter Series

The model 820 Shallow Water is a high-precision submersible tiltmeter for use in fresh and saltwater applications. Using an absolute gravity-referenced electrolytic sensor, the 820 delivers superior measurement accuracy with virtually no long-term drift. High-gain units are sensitive to <0.0017 mm/m or better. Output options include analog (±5 VDC, ±10 VDC), current (4-20mA), and digital (RS-232 and RS-422). All units are rated to 200 meters (656.2 ft) waterproof for advanced protection from the elements. Use the 820 “Shallow Water” for structural monitoring, angle measurement and control, platform leveling, and more.

 

 

Additional information

Weight 56.4 oz
Dimensions 3.6 × 4.4 × 2.4 in

A820: ±5V Output

Performance Specifications

High GainStandardWide Angle
Angular Range (°)±0.5±3.0±50
Resolution (°)<0.00010.00010.002
Repeatability (°)0.00030.00030.004
Non-linearity (%)0.10.10.1
Time Constant0.15 sec
Kz Temperature Coefficient (°/C)±0.0002±0.002
Ks Temperature Coefficient (%/°C)0.04<0.1
Baud Rate9600 (default), 19200, 28800, 57600, 115200, 130400
OutputRS-232, RS-422
Output Format NMEA XDR, Trimble TCM, Ashtec compatible, Simple (default: X, Y, Temp., S/N)
ChannelsTilt, Temperature, S/N
Temperature Output0.1°C/mV typical
(single ended; 0°C = 0mV)
Power7-28 VDC @ 30mA, 250 mV ripple max, reverse polarity protected
Environmental-4 to +60° C operation;
-30 to +100° C storage.
Submersible to 200 meters (656.2 ft)
Materials316SS
MountingTwo no. 10 stainless steel mounting screws.
Housing Connector6-pin bulkhead, male plug
Cable6-conductor unshielded, 20AWG female receptacle with locking sleeve, neoprene jacket, 24”

C820: 4-20mA Output

Performance Specifications

High GainStandardWide Angle
Angular Range (°)±0.5±3.0±50
Resolution (°)<0.00010.00060.01
Repeatability (°)<0.00020.0010.02
Non-linearity (%)12½ span: 1
Full span: 2
Scale Factor (°/mA)0.06250.3756.25
Time Constant0.15 sec
Kz Temperature Coefficient (°/C)±0.0002±0.002
Ks Temperature Coefficient (%/°C)<0.04<0.1
Output4-20mA Two-wire current loop (per axis)
ChannelsTilt, Temperature
Output Impedance (Ω)270
Temperature OutputTemperature is measured with a 2500 Ohm thermistor, -50 to 150°C range
Power(0.02 Ampere x R + 10 VDC) < Vs < 29 VDC
Environmental-4 to +60° C operation; -30 to +100° C storage.
Submersible to 200 meters (656.2 ft)
Materials316SS
MountingTwo no. 10 stainless steel mounting screws.
Housing Connector6-pin bulkhead, male plug
Cable6-conductor unshielded, 20AWG female receptacle with locking sleeve, neoprene jacket, 24”

D820: Digital Output

Performance Specifications

High GainStandardWide Angle
Angular Range (°)±0.5±3.0±50
Resolution (°)<0.00010.00010.002
Repeatability (°)0.00030.00030.004
Non-linearity (%)0.10.10.1
Time Constant0.15 sec
Kz Temperature Coefficient (°/C)±0.0002±0.002
Ks Temperature Coefficient (%/°C)0.04<0.1
Baud Rate9600 (default), 19200, 28800, 57600, 115200, 130400
OutputRS-232, RS-422
Output Format NMEA XDR, Trimble TCM, Ashtec compatible, Simple (default: X, Y, Temp., S/N)
ChannelsTilt, Temperature, S/N
Temperature Output0.1°C/mV typical
(single ended; 0°C = 0mV)
Power7-28 VDC @ 30mA, 250 mV ripple max, reverse polarity protected
Environmental-4 to +60° C operation;
-30 to +100° C storage.
Submersible to 200 meters (656.2 ft)
Materials316SS
MountingTwo no. 10 stainless steel mounting screws.
Housing Connector6-pin bulkhead, male plug
Cable6-conductor unshielded, 20AWG female receptacle with locking sleeve, neoprene jacket, 24”

Downloads

A820 Datasheet A820 Outline Drawing A820 User Manual
C820 Datasheet C820 Outline Drawing C820 User Manual
D820 Datasheet  D820 Outline Drawing  D820 User Manual

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