Additional Information
| Weight | 56.4 oz |
|---|---|
| Dimensions | 3.6 × 4.4 × 2.4 in |
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.
Performance Specifications
A820: ±5V Output
Performance Specifications
High Gain Standard Wide Angle
Angular Range (°) ±0.5 ±3.0 ±50
Resolution (°) <0.0001 0.0001 0.002
Repeatability (°) 0.0003 0.0003 0.004
Non-linearity (%) 0.1 0.1 0.1
Time Constant 0.15 sec
Kz Temperature Coefficient (°/C) ±0.0002 ±0.002
Ks Temperature Coefficient (%/°C) 0.04 <0.1
Baud Rate 9600 (default), 19200, 28800, 57600, 115200, 130400
Output RS-232, RS-422
Output Format NMEA XDR, Trimble TCM, Ashtec compatible, Simple (default: X, Y, Temp., S/N)
Channels Tilt, Temperature, S/N
Temperature Output 0.1°C/mV typical
(single ended; 0°C = 0mV)
Power 7-28 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)
Materials 316SS
Mounting Two no. 10 stainless steel mounting screws.
Housing Connector 6-pin bulkhead, male plug
Cable 6-conductor unshielded, 20AWG female receptacle with locking sleeve, neoprene jacket, 24”
C820: 4-20mA Output
Performance Specifications
| High Gain | Standard | Wide Angle | |
| Angular Range (°) | ±0.5 | ±3.0 | ±50 |
| Resolution (°) | <0.0001 | 0.0006 | 0.01 |
| Repeatability (°) | <0.0002 | 0.001 | 0.02 |
| Non-linearity (%) | 1 | 2 | ½ span: 1 Full span: 2 |
| Scale Factor (°/mA) | 0.0625 | 0.375 | 6.25 |
| Time Constant | 0.15 sec | ||
| Kz Temperature Coefficient (°/C) | ±0.0002 | ±0.002 | |
| Ks Temperature Coefficient (%/°C) | <0.04 | <0.1 | |
| Output | 4-20mA Two-wire current loop (per axis) | ||
| Channels | Tilt, Temperature | ||
| Output Impedance (Ω) | 270 | ||
| Temperature Output | Temperature 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) |
||
| Materials | 316SS | ||
| Mounting | Two no. 10 stainless steel mounting screws. | ||
| Housing Connector | 6-pin bulkhead, male plug | ||
| Cable | 6-conductor unshielded, 20AWG female receptacle with locking sleeve, neoprene jacket, 24” | ||
D820: Digital Output
Performance Specifications
| High Gain | Standard | Wide Angle | |
| Angular Range (°) | ±0.5 | ±3.0 | ±50 |
| Resolution (°) | <0.0001 | 0.0001 | 0.002 |
| Repeatability (°) | 0.0003 | 0.0003 | 0.004 |
| Non-linearity (%) | 0.1 | 0.1 | 0.1 |
| Time Constant | 0.15 sec | ||
| Kz Temperature Coefficient (°/C) | ±0.0002 | ±0.002 | |
| Ks Temperature Coefficient (%/°C) | 0.04 | <0.1 | |
| Baud Rate | 9600 (default), 19200, 28800, 57600, 115200, 130400 | ||
| Output | RS-232, RS-422 | ||
| Output Format | NMEA XDR, Trimble TCM, Ashtec compatible, Simple (default: X, Y, Temp., S/N) | ||
| Channels | Tilt, Temperature, S/N | ||
| Temperature Output | 0.1°C/mV typical (single ended; 0°C = 0mV) |
||
| Power | 7-28 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) |
||
| Materials | 316SS | ||
| Mounting | Two no. 10 stainless steel mounting screws. | ||
| Housing Connector | 6-pin bulkhead, male plug | ||
| Cable | 6-conductor unshielded, 20AWG female receptacle with locking sleeve, neoprene jacket, 24” | ||
