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

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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

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Figure 5. Cable Assembly at Top End of Tiltmeter (see Figure 2 for item numbers)
Figure 6. Tilt Sign Convention, Looking Down at Top of Tiltmeter

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Figure 7. Test cable for LILY version 98020-03 with 8-pin connector. This cable has two
serial connectors, RS485 and RS232.
Figure 8. DB9 serial connectors and barrel connector (upper left) for power transformer.
Test cables for LILY versions 98020-01 and -02 have only one serial connector.
6 Initial Check-Out Procedures
Before installing your tiltmeter, verify that it is functioning properly by following the steps below.

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Refer to the firmware command summary in Section 8.3. The following instructions assume that the
operator is using HyperTerminal (Windows 95 and later) to communicate with the tiltmeter:
1. Apply power and attach the tiltmeter to a PC according to the wire color and pin assignment code
in Appendix A. Or, use the test cable (Figure 7 and 8) and power transformer supplied with your
Starter Kit.
2. Open HyperTerminal, selecting the proper COM port and baud rate (the default baud rate for your
tiltmeter is 19200).
3. Type the command *9900XYC2 (note that the tiltmeter firmware commands are case sensitive).
4. If properly attached, the tiltmeter will now start outputting data through the serial port at a rate of 1
reading per second, and the data will be displayed in HyperTerminal.
5. Tilt the unit in the +X and then the +Y direction (Figure 6). Next tilt it in the –X and –Y
directions. Verify that the tilt values move through the full measurement range (Section 3) and that
the sign (polarity) of the output changes on opposite sides of null.
6. Type the command *9900XYC-OFF to stop the output.
7. Your LILY tiltmeter is now ready for installation.
7 Installing and Leveling Your Tiltmeter, Collecting Data
LILY tiltmeters are designed for installation at any depth in cased or uncased holes with internal
diameters of 64 mm (2.5 inches) or greater. We consider an internal diameter of 76 mm (3 inches) to be
ideal. If the diameter is too small, the tiltmeter may become stuck if the casing bends or deforms.
To install your tiltmeter, first pour clean sand into bottom of the hole to a depth of 8-10 cm (3-4
inches). Lower LILY to the bottom of the hole on a rope which has been threaded through the hole in the
handle (Figure 3). Then pour enough sand into the hole to cover the tiltmeter to the middle of the handle.
Keep the rope on the tiltmeter if you plan to retrieve it later.
After LILY has been installed in the hole, connect the cable to a computer, power the tiltmeter, and begin
the self-leveling process by issuing the following firmware commands:
*9900SO-SIM
(This command puts the output into “Simple” format)
*9900XY-LEVEL,1
(This command begins the leveling process)
The leveling process typically takes 5-10 minutes total. The leveling process can take up to 30 minutes
per axis depending on the last leveling and the angle of the borehole. When the X and Y readings are around 0
to +/-20 microradians, the leveling process will stop. You should then issue the following command before
proceeding:
*9900XY-LEVEL,0
(This command resets the tiltmeter so that it can be
leveled again later.)

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Leveling a single axis is possible with the following commands.
*9900X-LEVEL,1
(This command will level the X-axis)
*9900X-LEVEL,0
(This command resets the tiltmeter so that it can be
leveled again later.)
*9900Y-LEVEL,1
(This command will level the Y-axis)
*9900Y-LEVEL,0
(This command resets the tiltmeter so that it can be
leveled again later.)
Unless you plan to collect data with the “Simple” output format, you should now change the format
using the SO command to your desired output format. For example, the following command changes the
output to the XDR format.
*9900SO-XDR
Next, set the number of samples to average for each output. The command below sets the number at 8000:
*9900XY-SET-N-SAMP,8000
To request a single sample, e.g., from a GPS receiver, issue the command:
*9900XY
Or, to continuously output once per minute, issue the command:
*9900XYC4
Note that the LILY tiltmeter samples the waveform coming from each of the tilt sensors at a rate of
1 kilohertz. An 8000-sample average requires 8 seconds per sensor, or a total of 16 seconds to average
enough samples for one output on each channel.
For a complete description of the firmware commands, see Section 8 and Appendix B.
7.1 Settling Behavior
After you level the sensors in your tiltmeter, they will continue to “settle” until they reach
equilibrium. A typical example of this settling is shown in Figure 9. In this example, the sensors were
leveled after tiltmeter installation in a barrel filled with sand in the Jewell Instruments laboratory. The
graph (Figure 9) begins at the end of the leveling process and shows that the X sensor settled about 25
microradians and the Y sensor about 12 microradians over a period of a few hours (the increase in output at
the end of the data set is caused by warming after sunrise). In some cases, we have found that leveling a
second time after installation increases long-term stability and reduces long-term drift.

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8 Communicating with your LILY Tiltmeter
8.1 Basic Requirements and Settings
You may communicate with your tiltmeter using:
1. A terminal emulator program (e.g. Terminal in Windows 3.1 or HyperTerminal in Windows 95 and
later); or
2. A GPS receiver that is capable of sending and receiving terminal commands.
All communication to the tiltmeter is performed through the send (transmit) and receive wires of
the serial port. The default parameters for the serial port are set to no parity, 8 bits and 1 stop bit with no
hardware or software flow control. The baud rate is the only parameter that is user-selectable. The default
baud rate is 19200. Baud rates up to 115200 are supported.
LILY@ jewellinstruments Sandpit - SN6561
XYC4 - Logging to Flash - FW1.0R
12/22/05 (7:10 PM) to 12/23/25 (9:10) AM
Figure 9. Typical Settling Behavior of LILY Tiltmeter after Leveling. Settling Occurs between
7:00 and 9:00 p.m. on 12/22/05.
LILY @ AGI Sandpit - SN6561
XYC4 - Logging to Flash - FW1.0R
12/22/05 (7:10 PM) to 12/23/05 (9:10 AM)
-40
-35
-30
-25
-20
-15
-10
-5
0
5
10
12/22/05 6:43
PM 12/22/05 9:07 PM 12/22/05 11:31 PM 12/23/05 1:55 AM 12/23/05 4:19 AM 12/23/05 6:43 AM 12/23/05 9:07 AM
Time
microradianans
N6561 X
N6561 Y
N6561X
N6561Y
N6561 X
N6561 Y

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8.2 Firmware Command Format
The format of commands issued by the host (PC or GPS receiver) is:
*9900<command><CR><LF>
Valid commands are summarized in Section 8.3 and described in detail in Appendix B.
The input/output processing on the serial port of the LILY tiltmeter is as follows:
(1) Input is read until a <CR> or <LF> (carriage return or line feed) is received. (On a PC, this usually
means pressing the ‘Enter’ or ‘Return’ key.)
(2) When a line is received, it is parsed to see if it is a command of the device. If it is not, then it is echoed
back out, terminated with a <CR> <LF> and we go back to step (1). All strings that are not commands
for the unit are echoed. If the command is for the device, we then go to step (3).
(3) The command is processed and we return to step (1). All incoming characters are buffered (up to
1000) while the command is being processed. If the command is for ID 99 and echoing of 99
commands is enabled, the command is echoed after the command result is transmitted.
Default output of the tiltmeter is the Simple (“SIM”) comma-delimited string consisting of X tilt in
microradians, Y tilt in microradians, temperature in C, and the serial number of the device. Optional outputs
consist of a Trimble Navigation proprietary ASCII string with X (Roll) and Y (Pitch) tilts in microradians, and
two output formats that follow NMEA Standard 0183, version 2.1, October 15, 1995. This standard may be
obtained from:
National Marine Electronics Association (NMEA)
National Office
P.O. Box 3435
New Bern, NC 28564-3435 USA
Tel: [phone]
Fax: [phone]
8.3 Firmware Command Summary
The list below summarizes the most important user-accessible firmware commands. Precede these
Commands with the string *9900. See Appendix C for additional details.
XY Outputs a single tilt and temperature measurement. The format of the output
Depends on the setting of the SO command.
SO-xxx Selects the output format for the XY command. “xxx” selects format as follows:
ASH: Ashtech compatible NMEA format
SIM: Simple x,y,t,sn output string (default)
XDR: NMEA XDR format
TCM:Trimble Navigation proprietary pitch (Y) and roll (X) string
XY-MEMS Stores tiltmeter readings at selected output rate in nonvolatile memory.

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XY-MEMD Downloads data from nonvolatile memory.
XY-M1 Sets the tiltmeter to Mode-1 operation.
XYVR Displays the sign-on string.
ID Sets the tiltmeter ID (not currently implemented).
XY-TR-PASH-ON Translates the Paros provided $PASHS,XDR,P sentences to standard
NMEA XDR format.
XY-TR-PASH-OFF Turns off translation of $PASHS,XDR,P sentences.
XY-EP Enables power on message.
XY-SP Disables power on message.
XY-SET-BAUDRATE,xSets baud rate to value of xin bits per second. Selectable values include
4800, 9600, 19200, 28800, 57600 and 115200 baud.
XY-SET-N-SAMP,xSets number of samples that are averaged before a reading is transmitted;
xmay have any value from 1 to 8000. Changing this value may also change
the output rate.
XY-LEVEL,xStarts sensor leveling procedure when x= 1 and stops leveling when x= 0.
XY-LEVEL,x,override,iGain,pGain,dGain,iMax,iMin
Starts sensor leveling procedure when x= 1 and stops leveling when x= 0,
however, this command provides some additional functionality. When
override = 1, the end range motor current detection is turned off—allowing an
increase in current to be applied to the leveling motors. This allows the
motors to level in specific harsh environmental conditions, however, raises
the chances of the motor becoming stuck at the end of the ranges (for
example, if the Lily is outside of the leveling range). Additional inputs
(iGain, pGain, dGain, iMax, and iMin) are used with the PID leveling
Algorithm and should not be changed from factory settings unless the end user
Is having significant leveling problems. Each individual Lily has PID
Coefficients that are uniquely tuned and tested at the factory. The current
Values can be found by using the XY-DUMP2 command.
Using the advanced XY-LEVEL command with the override set to 1 bypasses normal ‘out of
range’ detection methods and can potentially lead to the leveling motors becoming stuck. When
using this command, verify that the instruments installation angles is within the specified
leveling range. Should the motors get stuck, the unit will have to be opened to return normal
operation.
XY-SET-RSMODE,xSelects serial output mode:
x= 0 RS232
x= 1 RS485 (RS422)
XY-AUTOZ Turns on auto zero function.
XY-AUTOXOFF turns off auto zero function.

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XYCxContinuously sends XY data where x determines output rate as follows:
x= 0: 8-10 outputs per second
x= 1: 4 outputs per second
x= 2: 1 output per second (default)
x= 3: 1 output every 10 seconds
x= 4: 1 output every 60 seconds
x= 5: 1 output every hour
x= 6: 1 output every 12 hours
x= 7: 1 output every 24 hours
x= 0A: Averaging of the 8-10 outputs per second data
x= 1A: Averaging of the 4 outputs per second data
x= 2A or x= A: Averaging of the 1 output per second data
Once initiated, continuous output remains in effect until turned off with the
XYC-OFF command (see below).
XYC-OFF Turns off XYC mode.
XY-SET-MAG,x Adds compass heading to Simple (SIM) output string when x= 1 and
removes it when x= 0. This command works only when the tiltmeter output
is set to the Simple (SIM) output string (see section 8.4).
XY-MAG-OFFSET,xSets the magnetic declination. The xvalue is added to the measured output.
XY-DUMP-SETTINGS Dumps settings of device.
XY-DUMP2 Dumps extended settings of device.
XY-TOGGLE-SUPPLYVOLTAGE Appends a supply voltage reading to the Simple (SIM) output
string when toggled on (see section 8.4).
XY-TOGGLE-TIMESTAMP Appends a timestamp to the Simple (SIM) output string when
toggled on (see section 8.4).
SET-TIME,sec,min,hour,day,month,year Sets the current Lily time to a specific time. Each input must
be two characters long:
sec 00-59
min 00-59
hour 00-23
day 00-31
month 00-12
year 00-99

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8.4 Sample Data Using the XY Command
The most commonly used command is the XY command, which returns the X and Y tilt angles in
microradians, and the internal temperature of the tiltmeter in ºC. The format of the returned data depends
on the setting of the SO command. The returned data are averages of a series of readings. The number of
samples used in the average is set by the XY-SET-N-SAMP command. The following lines illustrate the
format of the data returned by the XY command for the range of possible SO settings:
SO = “ASH.” Ashtech compatible NMEA output string which returns the North-South (Y) and East-West
(X) tilt angle in microradians and the internal temperature of the tiltmeter in ºC:
$PASHS,XDR,A,004.261,M,N,A,004.280,M,E,C,021.288,C,T-N1346
$PASHS,XDR,A,004.261,M,N,A,004.280,M,E,C,021.306,C,T-N1346
$PASHS,XDR,A,004.261,M,N,A,004.280,M,E,C,021.298,C,T-N1346
$PASHS,XDR,A,004.261,M,N,A,004.280,M,E,C,021.332,C,T-N1346
SO = “SIM” (default). Simple X,Y,T,TS,SV,SN output which returns the X and Y tilt angle in
microradians, the internal temperature of the tiltmeter in ºC, a timestamp (if enabled) and a supply voltage
reading in Volts(if enabled):
$-0.619,0.023,18.910,N0000
$-0.619,0.023,18.923,N0000
$-0.620,0.024,18.932,N0000
$-0.620,0.023,18.951,N0000
SO = “SIM” with the Supply Voltage ON:
$-330.000,-330.000, 21.16,11.86,N7055
$-330.000,-330.000, 21.16,11.87,N7055
$-330.000,-330.000, 21.17,11.86,N7055
$-330.000,-330.000, 21.16,11.86,N7055
SO = “SIM” with the Timestamp ON:
$-330.000,-330.000, 21.14,01/19/07 14:53:21,N7055
$-330.000,-330.000, 21.13,01/19/07 14:53:22,N7055
$-330.000,-330.000, 21.12,01/19/07 14:53:23,N7055
$-330.000,-330.000, 21.14,01/19/07 14:53:24,N7055
SO = “SIM” with the Supply Voltage and the Timestamp ON:
$-330.000,-330.000, 21.17,01/19/07 14:53:59,11.86,N7055
$-330.000,-330.000, 21.16,01/19/07 14:54:00,11.87,N7055
$-330.000,-330.000, 21.14,01/19/07 14:54:01,11.86,N7055
$-330.000,-330.000, 21.16,01/19/07 14:54:02,11.86,N7055

LILY | 2013 User Manual 18
B-05-1003, Rev. J
SO = “XDR.” Standard NMEA XDR output string which returns the North-South (Y) and East-West (X)
tilt angle in microradians and the internal temperature of the tiltmeter in ºC:
$YXXDR,A,000.034,M,N,A,-00.625,M,E,C,021.651,C,T-N0000*47
$YXXDR,A,000.034,M,N,A,-00.624,M,E,C,021.675,C,T-N0000*40
$YXXDR,A,000.034,M,N,A,-00.624,M,E,C,021.686,C,T-N0000*4C
$YXXDR,A,000.034,M,N,A,-00.625,M,E,C,021.707,C,T-N0000*45
SO = “TCM.” Proprietary Trimble Navigation pitch (Y-tilt) and roll (X-tilt) output string which returns the
tilt angle in microradians and a checksum:
$P-00.907R002.186*1C
$P-00.906R002.183*18
$P-00.908R002.191*15
$P-00.908R002.191*15
$P-00.905R002.190*19
8.5 Using the Magnetic Compass
To record the magnetic heading (azimuth) of the tiltmeter, you must first set the output to Simple
(SIM) mode by issuing the command *9900SO-SIM. Then, to turn the compass output on, issue the
command *9900XY-SET-MAG,1.
Now, whenever an XY or XYC command is issued, the output will have the form:
$-305.032,-124.346, 97.93, 18.60,N6561
where the first two variables are the X and Y tilts in microradians, the third is compass heading (+Y
direction) counter-clockwise from north, the fourth is temperature (oC), and the fifth is the tiltmeter serial
number.
The compass heading is the azimuth of the +Y direction of the tiltmeter (Figure 6), measured in
degrees counter-clockwise from North:
N = 0, W = 90, S = 180, E = 270
To remove the compass heading from the output data string, issue the *9900XY-SET-MAG,0
command.
To get an accurate azimuth it is necessary to correct for the magnetic declination. This is done
using the XY- MAG-OFFSET,xcommand, where xis the magnetic declination. The declination is added
to the output of the compass to give true north. Declinations to the west of north are positive numbers,
those to the east of north are negative numbers.