JEWELL LILY User manual

LILY Self-Leveling Borehole Tiltmeter
850 Perimeter Road
Manchester, NH 03103
Phone: [phone]
Fax: [phone]
www.jewellinstruments.com
[e-mail]
Copyright ©2013 by Jewell Instruments LLC. All rights reserved.
Manual No. B-05-1003, Rev. J
This manual is used in conjunction with Lily Firmware 2.1 Revision D

LILY | 2013 User Manual
B-05-1003, Rev. J
TABLE OF CONTENTS
1 Introduction....................................................................................................................................1
2 Technical Highlights ......................................................................................................................2
3 Specifications..................................................................................................................................3
4 Transient Protection ......................................................................................................................3
5 Digital Output Features and Wiring ............................................................................................4
5.1 RS232 .....................................................................................................................................4
5.2 RS485 (RS422) .......................................................................................................................4
5.3 Using the Test Cable ..............................................................................................................4
6 Initial Check-Out Procedures.....................................................................................................11
7 Installing and Leveling Your Tiltmeter, Collecting Data.........................................................11
7.1 Settling Behavior..................................................................................................................12
8 Communicating with your LILY Tiltmeter................................................................................12
8.1 Basic Requirements and Settings .........................................................................................12
8.2 Firmware Command Format................................................................................................14
8.3 Firmware Command Summary ............................................................................................15
8.4 Sample Data Using the XY Command..................................................................................17
8.5 Using the Magnetic Compass...............................................................................................18
8.6 Recording Data in Internal Memory or on a PC; Data File Sizes.......................................19
8.7 Switching between RS232 and RS485 Output......................................................................20
9 Maintenance and Troubleshooting.............................................................................................20
9.1 Routine Maintenance............................................................................................................20
9.2 Determining the Cause of Malfunctions...............................................................................20
9.3 Opening Your LILY Tiltmeter...............................................................................................21
Appendix A Connector Pin Assignments and Test Cable Wiring...............................................22
Appendix B Firmware Commands................................................................................................24
Appendix C Lily Tiltmeter Options and Accessories...................................................................28
Appendix D Warranty and Limitation of Liability......................................................................29
Appendix E Revision Record..........................................................................................................30

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1 Introduction
The LILY Self-Leveling Borehole Tiltmeter is designed for volcanic and tectonic research and for
monitoring of hydraulic fracturing and other subsurface processes in the energy and mineral industries.
LILY is the culmination of over 25 years of experience in the fields of instrumentation and geophysics by
engineers and scientists. Its small diameter and high-pressure stainless steel housing give it ruggedness and
versatility for demanding field projects (Figure 1).
The dual-axis tiltmeter senses angular movement in two orthogonal vertical planes using precision
electrolytic tilt sensors. The digital electronics convert the tilt signals to easily recorded RS485 or RS232
data streams that contain tilt (2 channels), azimuth, temperature, serial number and time. Data output in
NMEA 0183 format is a standard feature.
The LILY tilt sensors can self-level on command through a range of ±10 degrees and have <5
nanoradians resolution over a dynamic range of ±330 microradians. LILY incorporates an innovative new
design (patent applied for) that achieves high mechanical stability, necessary for stable long-term
measurements, at a much lower cost than was previously possible in instruments of this type (Figures 2-5).
The standard tiltmeter comes with RS485 digital output. An RS232 version is also available.
Additionally, we make a third version that allows the user to switch between RS485 and RS232 output.
The version that you have is indicated on the title page and in Appendix A of this user’s manual. Note that
RS232 is typically limited to cable lengths less than 15 meters (50 feet). The RS485 output of the LILY
tiltmeter (which is functionally equivalent to RS422 output) can drive cable lengths greater than 1200
meters (4,000 feet).
Your LILY includes a 45 cm (18 inch) cable whip that mates to the bulkhead connector on the top
of the tiltmeter. Please verify that the cable whip is present when you unpack the box. You can splice your
own cable to this whip and add your own connector to produce a hookup cable that is specific to your
application. Alternatively, we will be pleased to manufacture cables to your specifications. Please contact
customer support at www.jewellinstruments.com if you require our services.
You may have ordered one of the following “Starter Kits” when you purchased your LILY
tiltmeter. Each Starter Kit consists of one 6 meter (20 ft) test cable and a power transformer for powering
the tiltmeter from 100-240 VAC mains power:
Starter Kit Part No.
Description
89079-01
Test cable for LILY with RS485 output. 100-240 VAC transformer
89079-02
Test cable for LILY with RS232 output, 100-240 VAC transformer
89079-03
Test cable for LILY with both output types, 100-240 VAC transformer
The Starter Kit enables you to get your tiltmeter up and running quickly in a bench test or a shallow
borehole installation.
The test cables and transformer are also available for purchase separately. Part numbers for the test
cables are listed in Appendix A. The transformer is part number 00254-02.

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Figure 1. LILY Self-Leveling Borehole Tiltmeter
2 Technical Highlights
LILY includes the following key features:
•Tilt angle is measured with two electrolytic sensors with resolution < 5 nanoradians.
•The tiltmeter will automatically level both sensors upon receipt of one firmware command.
•An onboard magnetic compass measures tiltmeter azimuth.
•The tiltmeter comes with a powerful set of user-selectable firmware commands.
•All electronics reside on a single internal printed-circuit board.
•Housing and all structural elements are nonmagnetic stainless steel. The housing is designed
for rapid assembly and for full submergence at high water pressures (Figure 3).
•All tiltmeters are hand-assembled, calibrated, and tested at our plant under stringent quality
control standards.
•Jewell maintains complete specifications and test records for every tiltmeter built.
Your tiltmeter contains two electrolytic level sensors (one for each tilt axis) that produce changes
in resistance in response to a rotation of the sensor. A voltage divider network senses the resistance
change. The electronics then sample and convert the sensor outputs into tilt angles using factory calibration

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data stored in nonvolatile FLASH memory. LILY measure tilts in two orthogonal vertical planes, X and Y
(Figure 6). The vector sum of the outputs of both channels yields the magnitude of rotation with reference
to the vertical gravity vector and the direction of this rotation with respect to the tiltmeter azimuth. Please
contact us should you desire technical assistance when processing your tilt measurements.
3 Specifications
General specifications are listed below:
Specifications
CHANNELS
X tilt, Y tilt, azimuth, temperature
RESOLUTION
< 5 nanoradians
REPEATABILITY
Same as resolution under static conditions
MEASUREMENT RANGE
±330 microradians*
SELF-LEVELING RANGE
±10 degrees
LINEARITY
0.2% of full span
FREQ. RESPONSE
< 1 Hz
TEMPERATURE COEFS.
Span: KS= +0.02%/°C, Zero: KZ= ±3 radians/°C, typical.
AZIMUTH DETECTION
On-board magnetic compass, 0° to 360° output
SAMPLE RATES
User-selectable from 10/second to 1/day
DATA STORAGE
2 Megabytes of nonvolatile Flash memory (64,000 samples)
DATA FORMATS
Formats: NMEA XDR, Trimble proprietary, Ashtech compatible, Simple (x, y, azimuth, temperature, serial no.)
SERIAL OUTPUT
RS232 or RS485 (RS422). Baud rate: 4800, 9600, 19200 (default), 28800, 57600, 115200
REAL-TIME CLOCK
Present. Accuracy better than 10 minutes/year.
POWER REQT’S.
7 to 28 VDC @ 30 mA when sampling or transmitting, @16.5 mA in idle mode when sampling 1/minute; 250 mV
peak-to-peak ripple max., reverse polarity protected
SURGE PROTECTION
All input and output wires are transorb protected.
CONNECTIONS
6- or 8-pin wet-mateable neoprene connector with 10,000 psi (690 bars) pressure rating
ENVIRONMENTAL
Housing, electronics and sensor: -25°C to +85°C operational, -30°C to +100°C storage
Neoprene connector: -4°C to +60°C operational and storage
Collapse pressure of tubular housing = 3,300 psi (227 bars).
Titanium housing available, collapse pressure = 10,500 psi (725 bars)
LILY is fully submersible.
DIMENSION & WEIGHT
51mm (2 inches) diameter x 915mm (36 inches); detachable handle is 150mm (6 inches) long. 6.8 kg (15 lb)
MATERIALS
303 and 304 stainless steel
Memory Storage
Standard Memory Mode: Store 36,631 to 77,205 outputs to nonvolatile memory
Advanced Memory Mode: Store up to 32,749 outputs to nonvolatile memory
*1 degree = 3600 arc seconds = 17453 radians (microradians) 1 radian = 57.29578 degrees 2radians = 360 degrees
4 Transient Protection
Your tiltmeter has an earth ground circuit that provides protection from high-voltage transients
(surges) caused by nearby lightning strikes, unstable power supplies and other sources. High-voltage
transients, typically from nearby lightning strikes, are a common cause of failure of electronic field
instruments. In a typical occurrence, an induced transient travels along the cable until it encounters the
instrument’s electronic circuitry, where the delicate, low-voltage components are overloaded and fail. To
help avoid such an occurrence, each wire that enters the LILY tiltmeter is connected to the stainless steel
tiltmeter housing through variable-resistance type surge absorbers (transorbs). The transorbs normally have
extremely high resistance. They change to low-resistance conductors when they sense a high voltage on
one of the incoming wires. Ideally, they will then short this high voltage to the outer housing of the
tiltmeter and into the earth if the tiltmeter is grounded.

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The transorbs in LILY form a single stage of transient protection and require that the tiltmeter
housing be grounded to be effective. For fuller protection, we recommend the installation of an external
three-stage surge protection device, such as a PolyPhaser IX-DC24 (www.polyphaser.com) or Citel B480-
12 (www.citelprotection.com).
Transient protection and noise reduction can also be enhanced by keeping your cable as short as
possible, and by earthing your cable shield (drain wire) at one end only. Note that the tiltmeter connector
does not carry a cable shield into the tiltmeter or short it to the tiltmeter housing.
5 Digital Output Features and Wiring
The firmware in your tiltmeter can be selected to give you either RS232 or RS485 (RS422) digital
output. The test cable shipped with your cable has DB9 connectors for both output protocols. Firmware
command XY-SET-RSMODE,x is used to switch between the two protocols. Please read Section
8.7 before attempting to change output protocols.
5.1 RS232 Output
RS232 output is designed for signal transmission over cable lengths less than approximately 15
meters. LILY versions 98020-02 and 98020-03 have RS232 output. Appendix A lists the RS232 pin
assignments in the tiltmeter connector and cable.
5.2 RS485 (RS422) Output
RS485 and RS422 outputs are designed for signal transmission over long cables. The RS485 and
RS422 standards specify transmission distances up to 1220 meters (4000 ft), but it is common to transmit
data longer distances by using heavier gauge wire. LILY uses the RS485 protocol for data transmission,
which is functionally equivalent to the RS422 protocol in most cases. If you are operating more than one
tiltmeter with RS485 output, each requires its own serial port. It is not currently possible to operate a series
of tiltmeters in “multidrop” fashion on a single 4-wire cable. Appendix A shows the wiring and pin
assignments for version 98020-01 with RS485 output. Wiring of the DB9 connector on the test cable
corresponds to the National Instruments 8-port RS485 card for the PCI databus, part no. 777641-08 (2004).
When cable length exceeds 12 meters we recommend that termination resistors be used at the ends
of the transmit and receive lines to dampen possible reflections and maintain good signal quality.
Recommended resistor values are between 100 and 130 Ohms. Connect one resistor between the “receive”
inputs, Rx+ and Rx–, at the computer end of the cable. Similarly, connect one resistor between the
tiltmeter’s Rx+ and Rx– inputs at the tiltmeter end of the cable (Appendix A).
5.3 Using the Test Cable
The test cable and power transformer in the Starter Kit (see Section 1) are intended for initial
check-out and bench testing of the tiltmeter. The test cable includes a barrel connector (Figure 7) that
mates with the output jack of the power transformer. When the transformer is plugged into a 110 or 220
VAC wall socket, it supplies 12 Volts DC to the tiltmeter. The standard transformer shipped with the
tiltmeter accepts 100 to 240 Volts AC at 50-60 Hz. For safe operation, read the power rating printed on
the transformer and verify that it conforms to your wall socket power before use!
The test cable has either one or two DB9 serial connectors, depending on the tiltmeter version that
you have (Figure 8). To use the test cable, plug one end into the tiltmeter and the other end into your

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RS232 or RS485 serial port. Connect power and then begin communicating with the tiltmeter using the
firmware commands. If you use your own power supply, you can cut off the barrel connector and wire DC
power directly to the red (+) and black ( wires.

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Figure 2. LILY Self Leveling Borehole Tiltmeter, Exploded View

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Figure 3. Assembled View, with and without Outer Tube

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Figure 4. Assembled View Showing Header Locations on Circuit Board