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MX2001
Operating Manual
12 pgs739.84 Kb0
Specifications
2 pgs1.24 Mb0
Quick Start Guide
2 pgs450.93 Kb0
User Manual
8 pgs3.77 Mb0

Onset MX2001 Operating Manual

HOBO® MX Water Level Logger (MX2001-0x) Manual
The HOBO MX water level logger is used for monitoring changing water levels in a wide range of applications, including streams, lakes, wetlands, tidal areas, and groundwater. This Bluetooth® Low Energy-enabled logger is designed for wireless communication with a mobile device. Using the HOBOmobile® app, you can easily configure the logger and read it out—all from its deployed location—to your phone or tablet where you can view the logged data or share it for further analysis. With HOBOmobile, you can also set
HOBO MX Water Level Logger
Models:
• MX2001-01 or MX2001-01-Ti (Titanium), 9-meter/30-foot depth)
• MX2001-02, 30-meter/100-foot depth
• MX2001-03, 76-meter/250-foot depth
• MX2001-04 or MX2001-04-Ti
(Titanium), 4-meter/13-foot
depth Note: Each model consists of a sensor end (MX2001-0x-S or MX2001-0x-Ti-S) and a top end (MX2001-TOP).
Included Items:
• Two AA 1.5 V Batteries
• Logger consisting of a top end
and sensor end connected by a cable in desired length (ordered separately)
Required Items:
• HOBOmobile® 1.4 or later
• Device with iOS 8.3–9.0 and
Bluetooth 4.0
• Cable (CABLE-DR-xxx)
Accessory:
• Well cap (WELL-CAP-01)
Without cumbersome vent tubes or desiccants to maintain and convenient data retrieval to a phone or tablet, this easy-to-use logger is an ideal solution for water level studies and research.
Specifications
Pressure (Absolute) and Water Level Measurements MX2001-01-S and MX2001-01-Ti-S
Operation Range 0 to 207 kPa (0 to 30 psia); approximately 0 to 9 m (0 to 30 ft) of
Factory Calibrated Range 69 to 207 kPa (10 to 30 psia), 0° to 40°C (32° to 104°F)
Burst Pressure 310 kPa (45 psia) or 18 m (60 ft) depth
Water Level Accuracy* Typical error: ±0.05% FS, 0.5 cm (0.015 ft) water
Raw Pressure Accuracy** ±0.3% FS, 0.62 kPa (0.09 psi) maximum error
Resolution <0.02 kPa (0.003 psi), 0.21 cm (0.007 ft) water
Pressure Response Time (90%)*** <1 second at a stable temperature
Pressure (Absolute) and Water Level Measurements MX2001-02-S
Operation Range 0 to 400 kPa (0 to 58 psia); approximately 0 to 30.6 m (0 to 100 ft)
Factory Calibrated Range 69 to 400 kPa (10 to 58 psia), 0° to 40°C (32° to 104°F)
Burst Pressure 500 kPa (72.5 psia) or 40.8 m (134 ft) depth
Water Level Accuracy*
Raw Pressure Accuracy** ±0.3% FS, 1.20 kPa (0.17 psi) maximum error
Resolution <0.04 kPa (0.006 psi), 0.41 cm (0.013 ft) water
Pressure Response Time (90%)*** <1 second at a stable temperature
Pressure (Absolute) and Water Level Measurements MX2001-03-S
Operation Range 0 to 850 kPa (0 to 123.3 psia); approximately 0 to 76.5 m (0 to
Factory Calibrated Range 69 to 850 kPa (10 to 123.3 psia), 0° to 40°C (32° to 104°F)
Burst Pressure 1,200 kPa (174 psia) or 112 m (368 ft) depth
Water Level Accuracy*
Raw Pressure Accuracy** ±0.3% FS, 2.55 kPa (0.37 psi) maximum error
Resolution <0.085 kPa (0.012 psi), 0.87 cm (0.028 ft) water
Pressure Response Time (90%)*** <1 second at a stable temperature
water depth at sea level, or 0 to 12 m (0 to 40 ft) of water at 3,000 m (10,000 ft) of altitude
Maximum error: ±0.1% FS, 1.0 cm (0.03 ft) water
of water depth at sea level, or 0 to 33.6 m (0 to 111 ft) of water at 3,000 m (10,000 ft) of altitude
Typical error: ±0.05% FS, 1.5 cm (0.05 ft) water Maximum error: ±0.1% FS, 3.0 cm (0.1 ft) water
251 ft) of water depth at sea level, or 0 to 79.5 m (0 to 262 ft) of water at 3,000 m (10,000 ft) of altitude
Typical error: ±0.05% FS, 3.8 cm (0.125 ft) water Maximum error: ±0.1% FS, 7.6 cm (0.25 ft) water
19389-A
HOBO MX Water Level Logger (MX2001-0x) Manual
T
Specifications (continued)
Pressure (Absolute) and Water Level Measurements MX2001-04-S and MX2001-04-Ti-S
Operation Range 0 to 145 kPa (0 to 21 psia); approximately 0 to 4 m (0 to 13 ft) of water depth at sea level, or 0 to 7 m (0 to 23 ft)
Factory Calibrated Range 69 to 145 kPa (10 to 21 psia), 0° to 40°C (32° to 104°F)
Burst Pressure 310 kPa (45 psia) or 18 m (60 ft) depth
Water Level Accuracy* Typical error: ±0.075% FS, 0.3 cm (0.01 ft) water
Raw Pressure Accuracy** ±0.3% FS, 0.43 kPa (0.063 psi) maximum error
Resolution <0.014 kPa (0.002 psi), 0.14 cm (0.005 ft) water
Pressure Response Time (90%)*** <1 second at a stable temperature
Barometric Pressure (MX2001-TOP)
Operation Range 66 to 107 kPa (9.57 to 15.52 psia)
Temperature Calibrated Range -20 to 50°C (-4 to 122°C)
Accuracy ±0.2 kPa (±0.029 psi) over full temperature range at fixed pressure; maximum error ±0.5% FS
Water Level Accuracy* Typical error: ±0.075% FS, 0.3 cm (0.01 ft) water
Resolution <0.01 kPa (0.0015 psi)
Response Time <1 second at stable temperature
Stability (Drift) <0.01 kPa (0.0015 psi) per year
of water at 3,000 m (10,000 ft) of altitude
Maximum error: ±0.15% FS, 0.6 cm (0.02 ft) water
Maximum error: ±0.15% FS, 0.6 cm (0.02 ft) water
emperature Measurements (All Sensor End Models MX2001-0x-S and MX2001-0x-Ti-S)
Operation Range -20° to 50°C (-4° to 122°F)
Accuracy ±0.44°C from 0° to 50°C (±0.79°F from 32° to 122°F), see Plot A
Resolution 0.1°C at 25°C (0.18°F at 77°F), see Plot A
Response Time (90%) 5 minutes in water (typical)
Stability (Drift) 0.1°C (0.18°F) per year
Logger
Operating Range -20° to 50°C (-4° to 122°F)
Radio Power 1 mW (0 dBm)
Transmission Range Approximately 30.5 m (100 ft) line-of-sight
Wireless Data Standard Bluetooth Low Energy (Bluetooth Smart®)
Logging Rate 1 second to 18 hours
Logging Modes Fixed interval, multiple intervals with up to 8 user-defined logging intervals and durations, or burst
Memory Modes Wrap when full or stop when full
Start Modes Immediate, date & time, or next interval
Stop Modes When memory full, stop with HOBOmobile, date & time, or after a set logging period
Time Accuracy ±1 minute per month 0° to 50°C (32° to 122°F)
Battery Two AA, 1.5 V alkaline batteries, user replaceable
Battery Life 1 year, typical with logging interval of 1 minute. Faster logging and/or statistics sampling intervals, entering
Memory 256 KB memory (30,000 sets of measurements)
Full Memory Download Time
Dimensions Top end (MX2001-TOP): 2.54 cm (1.0 inches) diameter, 28.9 cm (11.4 inches) length; mounting hole 7.6 mm
burst logging mode, excessive readouts, checking of Full Status Details, and remaining connected with HOBOmobile will impact battery life.
Approximately 2 minutes; may take longer the further the device is from the top end of the logger
(0.3 inches) diameter
Sensor end (MX2001-0x-S and MX2001-0x-Ti-S: 2.54 cm (1.0 inches) diameter, 9.91 cm (3.9 inches) length
Note: The length of the water level logger cable (CABLE-DR-xxx) can vary ±3% from the length ordered. The logger adds 38.8 cm (15.3) inches to the length of the cable ordered.
1-800-LOGGERS 2 www.onsetcomp.com
Specifications (continued)
HOBO MX Water Level Logger (MX2001-0x) Manual
Weight
Wetted Materials Top end (MX2001-TOP): PVC housing, Polycarbonate end cap, Viton O-ring
* Water Level Accuracy: With accurate reference water level measurement, known water density,
and a stable temperature environment. System Water Level Accuracy equals the sum of the Barometric Water Level Accuracy plus the selected sensor end Water Level Accuracy.
** Raw Pressure Accuracy: Absolute pressure sensor accuracy includes all sensor drift, temperature,
and hysteresis-induced errors.
*** Changes in Temperature: Allow 20 minutes in water to achieve full temperature compensation of
the pressure sensor. There can be up to 0.5% of additional error due to rapid temperature changes. Measurement accuracy also depends on temperature response time.
Logger Components and Operation
Top end (MX2001-TOP): Approximately 136 g (4.78 oz) in air Stainless sensor end (MX2001-0x-S): Approximately 106 g (3.74 oz) in air; approximately 53.9 g (1.9 oz) in fresh
water Titanium sensor end (MX2001-0x-Ti-S): Approximately 80 g (2.83 oz) in air; approximately 37 g (1.3 oz) in fresh
water
Stainless sensor end (MX2001-0x-S): Acetal housing, Viton and Buna-N O-rings, ceramic sensor in stainless steel end cap
Titanium sensor end (MX2001-0x-Ti-S): Acetal housing, Viton and Buna-N O-rings, ceramic sensor in Titanium end cap
Cable (CABLE-DR-XXX): Polycarbonate end cap, PVC end cap, polycarbonate collar nut, Viton O-rings, polyurethane jacket
The CE Marking identifies this product as complying with all relevant directives in the European Union (EU).
See last page
pressure sensors and the body of the sensor end houses the temperature sensor.
Plot A
Top end
End cap with mounting hole
Sensor end
Temperature sensor (inside)
Pressure sensors (inside)
Water level logger cable
The MX water level logger consists of a top end and a sensor end that is connected by a water level logger cable. The three components work together to allow for wireless transfer of data to the HOBOmobile app on a mobile phone or tablet. This is an overview of each component:
• Top end. This contains the Bluetooth wireless
communication and two AA batteries. This top end unit is suspended from the top of the well using the mounting hole in the end cap (see Deploying the Logger).
• Sensor end. This measures the pressure and temperature
in the water. The nose cone on the sensor end houses the
• Water level logger cable. This is the cable that connects
the top end to the sensor end. Data measured by the sensor is transmitted through the cable to the top end where it is logged for later upload to a mobile phone or tablet (see Getting Started with the Logger).
When the three components are deployed together, you can then configure the logger or offload data to your mobile device without having to pull the logger up to the surface.
Factory Calibration
The pressure sensors in the sensor end are individually calibrated. During calibration, raw pressure sensor data is collected at multiple pressures and temperatures over the calibrated range of the logger (see Specifications). This data is used to generate calibration coefficients that are stored in the sensor end’s non-volatile memory. The calibration coefficients are then checked to be sure that the logger meets its stated accuracy over the calibrated range. The pressure sensor can be used at pressures and temperatures that are outside of the calibrated range, but the accuracy cannot be guaranteed.
Important: Never exceed the burst pressure of the sensor!
1-800-LOGGERS 3 www.onsetcomp.com
HOBO MX Water Level Logger (MX2001-0x) Manual
Getting Started with the Logger
Follow these steps to begin using the logger. After completing steps 1–4, it is recommended that you perform a trial run of steps 5 through 12 before deploying the logger.
Important: When assembling the logger or attaching the cable, make sure the O-rings and mating housing surfaces are clear of any debris. Any contamination of these surfaces can cause leaks that will lead to logger failure.
1. Install the batteries in the top end. See Battery Information for details.
2. Connect the logger components. Connect the top end to the sensor end with the water level logger cable as shown below. The end of the cable with the longer housing connects to the top end as shown below.
Plug this portion of the cable with the longer housing into the top end and screw to tighten (hand tight)
Plug this portion of the cable with the smaller housing into the sensor end and screw to tighten (hand tight)
3. Download HOBOmobile. Go to the App Store download the HOBOmobile app to your phone or tablet.
4. Open HOBOmobile. Enable Bluetooth in your device settings if prompted.
5. Determine the logger is within range. In HOBOmobile, tap
at the bottom of the screen. The logger should appear in the Recently Seen/In Range list in the HOBOs screen as shown below (note that the serial number shown in HOBOmobile is for the top end of the logger). If it does not appear in the list, make sure the logger is within range of your device. Note that sensor readings are displayed as “--“ when the logger is stopped. Readings are updated every minute while the logger is logging and in range.
SM
and
• If your device can connect to the logger intermittently or loses its connection, move closer to the top end of the logger, within sight if possible.
• If the logger appears in the Recently Seen/In Range list, but you cannot connect to it or if you are experiencing persistent connection problems, close HOBOmobile and power cycle the mobile device (turn it off, wait a minute, and turn it back on). This forces the previous Bluetooth connection to close.
8. Configure the logger. Once connected to the logger, tap Configure to set up the logger.
9. Set the Reference Water Level and Water Density.
a. In the Configure screen, tap Reference Water Level or
Water Density and enter the current water level as the reference level in meters or feet. Water levels that are below the reference point should be entered as negative values. The reference water level entered will be associated with a data point taken upon tapping Start (step 12) to determine the correction factor to be used for water level data.
b. Select the water density for the deployment or enter
your own value under Manual Input.
c. Tap Done to return to the Configure screen.
10. Enable the desired sensors. Differential pressure must be enabled to calculate water level. Temperature must be
6. Deploy the logger if ready. If you are ready to deploy the
logger, place it in the deployment location (see Deploying
enabled to log absolute pressure. Temperature must also be enabled if you selected the water density option “Fresh Water adjusted for Temp” because the temperature values are used to calculate the water density.
the Logger for deployment guidelines). Otherwise, skip deployment and complete the following steps as a test.
7. Connect to the logger. Tap a row in the Recently Seen/In Range list to connect to the logger. Tips for connecting:
• Make sure the top end of the logger is within range of
your mobile device. The range for successful wireless communication is approximately 30.5 m (100 ft) with full line-of-sight.
1-800-LOGGERS 4 www.onsetcomp.com
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