Crystal WT Series User manual

C R Y S T A L
engineering corporation
Operation Manual
WTSeries
Digital Pressure Gauge

Contents
Introduction........................................................2
Operating Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Unitsbutton.............................................................4
Zero...................................................................4
Peak detection and Average . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Resetting (clearing) recorded peak values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Automaticshut-off.......................................................5
Backlighting the Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
MeasuringVacuum......................................................6
Water Density (Inches of Water). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Overpressure Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Low battery indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Battery replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Reset..................................................................7
Troubleshooting.....................................................8
Noisy or unstable reading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Non-repeatability of pressure measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
DisplayedErrors.........................................................8
Display continuously ashes all segments ...................................9
DigitalInterface.....................................................9
Calibration.........................................................9
WT Series Serial Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Model Numbering System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Specications......................................................11
Accuracy.............................................................11
Temperature...........................................................11
Humidity..............................................................11
Media Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Pressure Conversions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Connection ...........................................................12
Power ................................................................12
Enclosure .............................................................13
Pressure Ranges, Display Scales & Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Software..........................................................15
LabVIEW™ drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
CongXP Conguration Software. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Accessories.......................................................15
ACadapterkit.........................................................15
RS-232Cable..........................................................15
Trademarks........................................................15
Warranty..........................................................16
HowtoContactUs:.....................................................16

Page 2 •WT Series
C R Y S T A L
engineering corporation
Introduction
The WTSeries Digital Test Gauge is designed to t in 8” or 10” panel mount applications common-
ly found in portable test sets. The WTSeries is based on the Crystal Engineering Corp. model XP2i
digital pressure gauge (www.xp2i.com). The WTSeries pressure gauge has been repackaged so
that it may be mounted in a portable enclosure, while retaining easy access to batteries and to the
digital (RS-232) interface (both of which would otherwise be on the back of the gauge).
Accuracy is 0.1 percent of reading - so any WTSeries gauge can typically replace several gauges
you may have been using. The gauge is fully temperature compensated - so there is no change
in accuracy throughout the entire operating temperature range! Three AAA batteries provide
up to 500 hours of continuous operation. The batteries are easily replaced by removing the two
screws.
Your WTSeries gauge can be customized, through the use of CongXP software available from
Crystal Engineering. Your personal computer can disable, enable or modify a variety of features of
your WT Series.
Look for the
Con
FIGXP PROGRAMMABLE logo for programmable features that will:
•provide a user-dened pressure scale, and/or disable unused pressure units
•disable keypad recalibration, enable peak button and/or units button
•expand or decrease allowable Zero range
•enable other pressure units (like inches of mercury, kPa, bar, etc.)
•create and enable a user-dened pressure unit
•store a 12 digit ID or tag number in non-volatile memory
•adjust calibration values
We hope the WTSeries gauge meets your expectations, and we're interested in any comments or
suggestions you may have. You can send us a note at: [e-mail]. Many
features in this and our other products are a direct result of your comments!
Crystal Engineering is the company that designs, manufactures, markets and services the XP2i,
30 series pressure calibrators, MultiCal multimeter pressure adapters and a variety of industry spe-
cic pressure measuring equipment. Crystal Engineering pioneered features like full temperature
compensation and “of reading”rated gauges and calibrators. Pressure measuring equipment is the
only thing we do and that’s why we say: PRESSURE is Our BUSINESS™

WT Series •Page 3
C R Y S T A L
engineering corporation
Operating Instructions
The WTSeries gauge is shipped with batteries installed, so it’s ready to use. Press
and hold the (on/off)button. The gauge will rst test all LCD segments. Re-
lease the button when the gauge indicates pressure.
The WTSeries gauge always resumes operation in the mode and the units of the pressure last
used, and it does not automatically rezero when turned on.
WARNING: Severe injury or damage can occur through improper use of pressure instru-
ments! Do not exceed recommended pressure limits of tubing and ttings. Be certain all pres-
sure connections are secured.
CAUTION: Never insert any object into the pressure connection! The sensor diaphragm is
very thin and can be damaged or destroyed by solid or sharp objects. Cleaning of the sensor
must be done with appropriate solvents only.
The WTSeries is intended for gauge pressure measurement. It indicates the dierence between
applied pressure and ambient barometric pressure. However, the
zero
button can be used to
force the WTSeries to read zero pressure at any applied pressure, up to the full scale rating of the
gauge. The factory default setting limits the maximum zero value to 200 PSI, but this limit can be
changed with
Con
FIGXP .
Some WTSeries gauges are rated for absolute pressure. Absolute gauges indicate the dierence
between applied pressure and an internal vacuum reference. Absolute pressure is always positive.
For instance barometric pressure at sea level is on average about 14.7 PSI (approximately 100 kPA
or 1 Bar), so at sea level this is the lowest expected pressure indication. However, absolute gauges
can be “zeroed”(unless prevented by CongXP). After zeroing an absolute gauge it is possible to
indicate a negative pressure.
WARNING: This gauge can display zero pressure when connected to a source of pressure! Do
not rely on the display indication before disconnecting—it may not be indicating true pres-
sure. Never disconnect pressure instrumentation without rst relieving system pressure!

Page 4 •WT Series
C R Y S T A L
engineering corporation
Units button
Pressing this button causes the WTSeries gauge to select the next available unit of
pressure measurement. See “Pressure Ranges, Display Scales & Resolution” for
the list of pressure units available for your model.
Con
FIGXP PROGRAMMABLE Units that you don’t need or never use can be
turned o. You can also dene a special unit for your WTSeries gauge with CongXP. That way
you can use the WTSeries gauge to display directly in a unit not otherwise available, such as feet
of seawater, or foot-pounds of torque. When your custom unit is selected and displayed on the
WTSeries gauge, all pressure unit icons will be o.
Zero
To zero the WTSeries gauge, you must turn o peak indication, then press the
zero button for at least ½ second. The display will then briey ash all dashed
lines (- - - - -), indicating that it has been re-zeroed. If you attempt to zero the gauge
while more than 200 PSI is applied (or the pressure limit set with CongXP), the
command will be ignored, and “- -HI-” will be displayed.
WARNING: This gauge can display zero pressure when connected to a source of pressure! Do
not rely on the display indication before disconnecting—it may not be indicating true pres-
sure. Never disconnect pressure instrumentation without rst relieving system pressure!
You can clear the zero value: Turn o peak indication then press and hold the
zero
button until
the display changes from (- - - - -) to (- - -). This is especially useful for absolute gauges that have
been zeroed while measuring barometric pressure.
Zeroed Clear Zero (Unzero)
Con
FIGXP PROGRAMMABLE You can change the point at which the Zero button will display
“- -HI-”. For instance, you could set the maximum zero to 1 PSI. You can also disable the zero but-
ton entirely, by setting the Zero value to a large negative number.
The
zero
button changes its function when the peak high (
HI
) or the peak low ( LO ) icon is
displayed. While a peak icon is displayed the
zero
button becomes the clear button.
PSI inH2O inHg kpa
mmHg mmH2O mbar kgf/cm2
LO
HI PSI inH2O inHg kpa
mmHg mmH2O mbar kgf/cm2
LO
HI

WT Series •Page 5
C R Y S T A L
engineering corporation
Peak detection and Average
Pressing the Peak button causes the display to cycle through the following:
HI
. . . . . . . . . . Recorded maximum pressure
LO . . . . . . . . . . Minimum recorded pressure
HI
LO . . . . Average pressure*
<No Icon> . . . . Live pressure display
Peak high and low values are not saved when the gauge shuts o; they will reset to the current
reading when the WTSeries gauge is turned on or reset.
* From the factory this Average Pressure is disabled. Use CongXP to enable.
Con
FIGXP PROGRAMMABLE In some cases the ability to display a peak value may not be
needed, or may even be dangerous. CongXP allows you to disable this button.
WTSeries gauges can average 1 to 10 readings, recalculated every time pressure is measured (3
times per second). Enable and set the number of readings to be averaged with CongXP.
Resetting (clearing) recorded peak values
Peak values (if enabled) can only be cleared when displaying either a high or low
recorded pressure. Press the clear button for at least ½ second. Dashed lines
will then briey appear across the display and both
HI
and
LO
icons will ash
briey, indicating that both peak values have been cleared. Both peak high and
low values will then display the current applied pressure. Pressing the clear button while
either peak hi or peak lo icon is displayed will not aect the zero value. If you need to rezero the
gauge, you must turn o both peak icons by pressing the peak button.
Automatic shut-off
The WTSeries gauge has a shuto timer and will turn o automatically after 20 minutes of non-
operation. Pressing any button or sending any command via the RS-232 connection resets the
shuto timer.
The shuto feature can be defeated, if desired, when turning the gauge on. Pressing the
(on/off) and
zero
buttons simultaneously will prevent the WTSeries gauge from automatically
turning o. The gauge will briey display the words“No Auto O” to indicate that it will not turn o.
This procedure is required each time the gauge is turned on, if you want to defeat the auto-shuto.

Page 6 •WT Series
C R Y S T A L
engineering corporation
Backlighting the Display
Pressing the (backlight) button instantly lights the display at maximum brightness,
but to keep it on you need to hold down the button for 2 seconds. The display will ash
briey, indicating that it will stay on for 1 minute. If you press the button again, the
backlight will go into a lower brightness setting to extend battery life, the display will again ash
briey, and remain on for 2 minutes. Press the button once more and the light will go out.
If you start the WTSeries gauge in the “No Auto O” mode, you select the brightness level the
same way, but the light will never time out and turn o; you will have to either turn o the gauge
or press the backlight again until the light goes out.
Measuring Vacuum
All versions of the WTSeries gauge can be used to measure moderate vacuum, though only
ranges of 300 PSI (and 20 bar or 2000 kPa) and lower are actually tested and certied for vacuum
operation.
When measuring pressure less than ambient barometric conditions, a minus (-) sign will appear.
WTSeries gauges are not recommended for continuous use at high vacuum (pressures lower than
-14.5 PSI, at sea level).
Absolute gauges (models with a “B” following the pressure range designation in the part num-
ber) will NOT indicate a negative sign when vacuum is applied, unless the zero button has been
pressed while a pressure greater than full vacuum is applied to the gauge. If your absolute gauge
does indicate a negative pressure, you can clear the zero value (“unzero”) by pressing the zero but-
ton until the display changes from ----- (5 dashes) to - - - (dash, space, dash, space, dash).
See “Zero” for details.
Water Density (Inches of Water)
The following applies only to models where inches of water are available. As shipped from the fac-
tory, the WTSeries gauge is set to display inches of water corresponding to the density of water at
4°C (39.2°F). You may require a dierent water density for your application, so the WTSeries can
be set to use the density of water at 20°C (68°F) or 15.6°C (60°F), instead.
To check and or change the water density setting from the keypad, turn on the WTSeries gauge
by pressing the (on/off) button and the units button simultaneously. The display will indi-
cate either “4C” or “60F” or “68F”.
Press the units button until the display cycles to the desired water density, then press the
zero
button to store the selection (this will not zero the gauge).
Con
FIGXP PROGRAMMABLE Select and set the desired density of water.

WT Series •Page 7
C R Y S T A L
engineering corporation
Overpressure Conditions
The WTSeries gauge will read pressure up to approximately 110% of the rated pressure range.
Above 110% percent of the range the display will start ashing and the readings will not be reli-
able. The zero function does not aect the point at which the display starts ashing to indicate
overpressure, so depending on the zero value it is possible that the display can start ashing with-
out the maximum pressure being displayed.
For instance, if a 100 PSI WTSeries gauge is zeroed when 30 PSI is being applied, it will indicate
that the overpressure condition has been reached at 80 PSI (i.e., 110% x 100 PSI – 30 PSI = 80 PSI).
Overpressure can aect accuracy, but the eect is only temporary unless the sensor has been
destroyed. See Specications for maximum overpressure.
Low battery indication
The battery icon ( ) is the rst indication of a low battery. The WTSeries gauge will continue
to operate accurately while the icon is visible. When the batteries are exhausted, the letters “batt”
will appear across the display. After “batt” appears, no pressure measurements will be possible
until the batteries are replaced.
Battery replacement
The WTSeries gauge uses 3 AAA alka-
line batteries. The batteries are located
above the gauge behind a metal pan-
el. With a small at blade screwdriver,
unscrew the two panel screws to gain
access to the battery compartment.
Remove the battery holder and slide the
cover o. After replacing the batteries,
the gauge will start operating imme-
diately (without having to press the
button). This indicates that a complete
reset has occurred, and is normal.
Reset
If for some reason the WTSeries gauge needs to be reset, remove any battery for at least one
minute, then reinstall the battery. If the reset is successful, the gauge will start operating without
pressing the (on/off) button. Reset will clear the zero, peak values will be reset to the current
reading, and the gauge will be set to the default unit of pressure (PSI).

Page 8 •WT Series
C R Y S T A L
engineering corporation
Troubleshooting
The WTSeries gauge is a very high performance gauge. Due to the high resolution of this prod-
uct, you may observe conditions that appear to be defects in the product, but are in fact a result of
being able to resolve and measure pressure to a degree not possible with other instruments.
Noisy or unstable reading
When calibrating or comparing the indicated pressure from a WTSeries gauge against a hydraulic
deadweight tester or piston gauge, the reading on the WTSeries may appear unstable - the least
signicant digit jumps up and down several counts.
Reason: Gas (usually air) is trapped in the line between the gauge and the deadweight tester.
What is actually happening is the mass is oscillating up and down, and the combination
of gas and uid is acting like a spring. At higher pressures (above 2000 PSI, typically) this
may eventually diminish, as the gas dissolves into the uid.
Solution: Evacuate all tubing with a vacuum pump, before introducing uid into the system.
Non-repeatability of pressure measurements
When checking the gauge against a hydraulic deadweight, increasing pressure measurements do
not match decreasing pressure measurements.
Reason: As in the previous note, gas has dissolved into the hydraulic uid. When decreasing the
pressure, the dissolved gas then leaves the uid, but at an uneven rate, so small pressure
dierential (due to uid head pressure) may exist between the reference deadweight
and the gauge being tested.
Solution: Evacuate all tubing with a vacuum pump, before introducing uid into the system.
Err 1 displayed
Reason: The WTSeries gauge checks the integrity of internal calibration coecients every time
it’s turned on. If any coecients have been corrupted in any way, “Err 1” is displayed.
Solution: Contact factory for instructions on how to restore the memory to the original factory
settings.
Err 2 displayed
Reason: The WTSeries gauge has tried to display a number too large for the display (i.e., more
than 5 digits). May be due to an electrical malfunction or numerical error.
Solution: Contact factory for further instructions.
Err 5 or Err 6 displayed
Reason: The WTSeries pressure sensor is exhibiting out of normal operating condition behavior.
Solution: Contact factory for sensor replacement.

WT Series •Page 9
C R Y S T A L
engineering corporation
Display continuously ashes all segments
Reason: After a reset, and after replacing batteries, the WTSeries gauge checks the integrity of
program memory. If for some reason it has been modied or corrupted, it ashes all seg-
ments, and prevents normal operation.
Solution: Contact factory for instructions on how to restore the memory to the original factory
settings.
Digital Interface
The WTSeries gauge can be connected to a personal computer via RS-232, using an ordinary DB9
extension cable (male DB9 for the gauge connection, female DB9 for the PC side). The interface
lets you record displayed readings and recorded peaks. The data string always includes the pres-
sure units. And the WTSeries gauge can be operated remotely, as if you were pressing the but-
tons. You can use a simple terminal program to send the commands, or, you can incorporate them
into your own software program. Refer to the XP2i Programming Instructions manual for details—
available from our website at: www.xp2i.com.
Calibration
If adjustment is required, we recommend returning the unit to the factory. Factory service oers
benets you won’t nd anywhere else. We have the facilities to test your gauge at a variety of
temperatures utilizing NIST traceable standards, resulting in calibration certicates that provide
performance data over temperature. Furthermore, upgrades may be available to add or enhance
operating features. We designed the product to last, and we support it so that you can get the
most from your investment.
Under normal operating conditions, we recommend the WTSeries gauge be calibrated on an
annual basis. Your quality system may require more or less frequent calibration, or your experience
with the gauge, or operating environment may suggest longer or shorter intervals.
Although we prefer that you return the WTSeries gauge to Crystal Engineering for calibration,
ordinary recertication and/or adjustments may be performed by any qualied personnel with ap-
propriate training and equipment. The following instructions are ONLY intended for such qualied
personnel with appropriate test equipment. We recommend that the calibration standards used
have a minimum rated accuracy of 0.025%. This level of accuracy may require the use of piston
(deadweight) gauges or very high performance pressure controllers, such as those manufactured
by DH Instruments (www.dhinstruments.com).
There are no internal potentiometers. The WTSeries gauge contains a “span”factor: “Userspan”,
set to approximately 1 (as shipped from the factory). As components age this may need to be
changed to a value slightly higher or lower, to slightly increase or decrease all readings. This ad-
justment can be made with or without a computer (see: CongXP Conguration Software).

Page 10 •WT Series
C R Y S T A L
engineering corporation
“Zero” the gauge, then record displayed pressure for two or more pressure points. Determine if the
WTSeries gauge would benet from an overall increase or decrease of the indicated pressures.
To change the userspan factor from the keypad, turn o the gauge, then press the (on/off),
units and peak buttons simultaneously. The rmware version will be briey displayed,
followed by the word “cal”, followed by the actual userspan value. The userspan factor may be
adjusted by pressing either the units or peak button to increase or decrease the value, re-
spectively. The value changes in 0.0001 increments. Press the zero button to store the new value
in memory, or the (on/off) button to cancel the change.
For absolute WTSeries gauges, it is possible to correct for long term drift using a second calibra-
tion factor, zero value o set. CongXP and a barometric reference with accuracy of 0.1 PSI or bet-
ter is required to perform the calibration. To calibrate the zero o set, clear the zero as described
earlier in this manual by pressing and holding the zero button until “- - -” appears. Once cleared,
subtract the displayed pressure from barometric pressure, add this dierence to any existing zero
value o set in CongXP, and update the gauge (new value = barometric – displayed + existing).
For example, if the displayed value is 14.5 PSI, barometric pressure is 14.7 PSI, and the existing zero
value o set in CongXP is 0.1 PSI, the new zero value o set would be 0.3 PSI (14.7 - 14.5 + 0.1 = 0.3).
Con
FIGXP PROGRAMMABLE The userspan level can be viewed, set directly, and disabled
by CongXP.
WT Series Serial Number
The serial number of your WTSeries is located
on the front panel directly below the zero but-
ton. It is also stored digitally within the gauge.
Model Numbering System
WT(prex)(type)-(options)
Prex: Pressure range and units - see table on page 14
Type: (none) . . .standard gauge
B . . . . . . . . (Barometric) Absolute pressure indication
Note: Absolute version available only on WTSeries gauges with ranges of 2000 PSI
and higher.
Options: -1000 . . . .Panel Mount Flange for 8.7”bolt center mounting
-1500 . . . . Panel Mount Flange for 10.125”bolt center mounting

WT Series •Page 11
C R Y S T A L
engineering corporation
Specifications
Accuracy specications are for one year, and include all eects of linearity, hysteresis, repeatability,
and temperature within the specied operating temperature range.
The gauge must be exercised and re-zeroed whenever exposed to signicant changes in environ-
mental conditions to achieve these specications. To exercise the gauge, cycle the gauge between
zero and the pressure of interest. A properly exercised gauge will return to a perfect zero reading.
Exposure to environmental extremes of temperature, shock and/or vibration may warrant a more
frequent recertication period.
Accuracy
20 to 100% of Full Scale: . . . . ±0.1% of reading
0 to 20% of Full Scale: . . . . . . . ±0.02% of Full Scale
Vacuum*, 300 PSI and lower pressure gauges:
0 to -14.5 PSIG : . . . . . . . . . . . . . ±0.25% of Full Scale,
where F.S. = . . . . . . . . . . . . . . . . -14.5 PSI
*Not specied for 500 PSI models and higher, although all models can be safely connected to
vacuum.
Temperature
Operating & Compensated Range: . . . -10°C to 50°C (14°F to 122°F)
Storage Range: . . . . . . . . . . . . . . . . . . . . . . -40°C to +75°C (-40°F to +167°F)
Humidity
Temperature Range Humidity
-10 to 10°C . . . . . . . . . . . . . . . . . Uncontrolled
10 to 30°C . . . . . . . . . . . . . . . . . . 0 to 95% Relative
30 to 40°C . . . . . . . . . . . . . . . . . . 0 to 75% Relative
40 to 50°C . . . . . . . . . . . . . . . . . . 0 to 45% Relative
Media Compatibility
Liquids and gases compatible with PTFE (Polytetrauoroethylene) penetrated, anodized alumi-
num sensor manifold, 316 stainless steel (sensor), and PTFE tape.

Page 12 •WT Series
C R Y S T A L
engineering corporation
Pressure Conversions
1 PSI = 27.6806 inches of water column (water at 4°C [39.2°F])
27.7070 inches of water column (water at 15.6°C [60°F])
27.7292 inches of water column (water at 20°C [68°F])
2.03602 inches of mercury (mercury at 0°C [32°F])
6.8948 kilopascals
51.7149 millimeters of mercury (mercury at 0°C [32°F])
703.087 millimeters of water column (water at 4°C [39.2°F])
0.068948 bar
68.948 millibar
0.070307 kilograms per square centimeter
Connection
Pressure Fitting: 1/8” female NPT.
Power
Batteries: 3 x AAA, alkaline recommended
Battery Life: 500 hours continuous operation
Low Battery Indicator: Battery Icon ( )
Dead Battery Indication: “batt”

WT Series •Page 13
C R Y S T A L
engineering corporation
Enclosure
Aluminum and stainless steel.
Weight: 1.25 kg (2.7 lbs), including batteries.
All dimensions in inches.
Dimensions in blue are for the 1500 Panel Mount Flange option.
°021
LP3
00.8
REVOCRAER
RETEMAID
08.3
07.8
ELCRICTLOB
50.1
LIATEDTROPLAIRES
1NIP
T
ROPERUSSERP
NOITISOP
AAAX3
)REVOCHTIW(
SSECCAYRETTAB
LAIRES
TROP
LEBALN/S
52.9
04.4
LLAURHT82.0X3
LEBALNOITACIFITNEDI
LEBALEGNAR
)YLNOECNEREFERROFNWOHS(
REVOCSBA
RAER
TROPERUSSERP
TPNF72-"8/1 REVOCRAER
SWERCSGNITNUOM
SECALP4
60.0
LENAP
SSENKCIHT
04.2
55.0
521.01
ELCRICTLOB
66.01

Page 14 •WT Series
C R Y S T A L
engineering corporation
Pressure Ranges, Display Scales & Resolution
1Unneeded pressure units may be disabled via the RS-232 connector using CongXP software. 2kPa models can display pressure in kPa and bar (or mbar) only. PSI and bar models can display all available units. 3WT Series gauges will indicate pressure up to 10% above Range Pressure. Above 110%, the XP2idisplay will ash,
indicating that the applied pressure exceeds the calibrated pressure range. If the calibrated pressure range is exceeded, the pressure displayed may not be accurate.
4An Absolute pressure version is available only on XP2is and XP2i-DDs with ranges of 2000 PSI and higher.
P/N Prex 15PSI 30PSI 100PSI 300PSI 500PSI 1KPSI 2KPSI 3KPSI 5KPSI 10KPSI
PSI bar
 
P/N Prex 1BAR 2BAR 7BAR 20BAR 30BAR 70BAR 140BAR 200BAR 300BAR 700BAR
kPa

P/N Prex 100KPA 200KPA 700KPA 2KKPA 3KKPA 7KKPA 14KKPA 20KKPA 30KKPA 70KKPA
Pressure Units and Resolution
0.001 0.001
0.01 0.01 0.01
0.1 0.1 0.1 0.1
1
PSI
0.01 0.01 0.01
0.1 0.1 0.1
1 1 1 1
kPa
0.0001 0.0001 0.0001
0.001 0.001 0.001
0.01 0.01 0.01 0.01
kg/cm2
0.0001 0.0001 0.0001
0.001 0.001 0.001
0.01 0.01 0.01 0.01
bar
0.001 0.001
0.01 0.01
0.1 0.1 0.1 0.1
1
0.01 0.01
0.1 0.1
1
inch Hg inch H2O
1 1 1
mm H2O
0.01
0.1 0.1
1 1
mm Hg
0.1 0.1 0.1
1 1
mbar

Over- pressure 6.5 x 3.0 x 2.0 x 2.0 x 2.0 x 2.0 x 2.0 x 1.5 x 1.5 x 1.5 x

WT Series •Page 15
C R Y S T A L
engineering corporation
Software
LabVIEW™ drivers
Control and communicate with the WTSeries gauge using National Instrument’s LabVIEW.
CongXP Conguration Software
Con
FIGXP Disable unwanted pressure units, set default pressure units, change water density,
adjust calibration, and more via the RS-232 interface.
Replacement Parts
The only user-replaceable parts are the batteries.
Accessories
AC adapter kit
P/N 2984: Permits operation of a WTSeries gauge from an AC supply of 90 - 264 VAC and 47 - 63
Hz. Includes interchangeable international plugs (for USA, Europe, U.K., and Australia). The adapter
will not charge batteries, but in the event of AC power loss, the gauge will automatically revert to
battery operation.
RS-232 Cable
P/N 2400: DB-9 male to DB-9 female straight pass-through cable.
Trademarks
This manual contains the following third-party trademarks, both registered and unregistered. All
marks are the property of their respective companies.
LabVIEW™ . . . . . . . . . . . . . . . . . . . . . . . . . . National Instruments
“Pressure is Our Business™” is a registered trademark of Crystal Engineering Corp.

Page 16 •WT Series
C R Y S T A L
engineering corporation
Warranty
Crystal Engineering Corporation warrants the WTSeries gauge Digital Pressure
Gauge to be free from defects in material and workmanship under normal use and
service for one (1) year from date of purchase to the original purchaser. It does not
apply to batteries or when the product has been misused, altered or damaged by
accident or abnormal conditions of operation.
Crystal Engineering will, at our option, repair or replace the defective device free of charge
and the device will be returned, transportation prepaid. However, if we determine the failure
was caused by misuse, alteration, accident or abnormal condition of operation, you will be
billed for the repair.
CRYSTAL ENGINEERING CORPORATION MAKES NOWARRANTYOTHERTHANTHELIMITEDWAR-
RANTY STATED ABOVE. ALL WARRANTIES, INCLUDING IMPLIED WARRANTIES OF MERCHANT-
ABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE, ARE LIMITED TO A PERIOD OF ONE (1)
YEAR FROM THE DATE OF PURCHASE. CRYSTAL ENGINEERING SHALL NOT BE LIABLE FOR ANY
SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES, WHETHER IN CONTRACT, TORT OR
OTHERWISE.
Note (USA only): Some states do not allow limitations of implied warranties or the exclusion
of incidental or consequential damages, so the above limitations or exclusions may not apply
to you. This warranty gives you specic legal rights and you may have other rights which vary
from state to state.
How to Contact Us:
Phone [phone]
Toll-Free [phone]
Fax [phone]
Email [e-mail]
Web www.crystalengineering.net
If calling, have ready the model number, serial number, date of purchase and reason for return.
You will receive instructions for returning the device to Crystal Engineering.
Send your comments to: [e-mail]

PN: 3310—Rev A
CRYSTAL
engineering corporation
© 2009 Crystal Engineering Corporation
708 Fiero Lane, Suite 9, San Luis Obispo, California 93401-8701