Crystal XP2 Operation Manual

D i g i t a l T e s t G a u g e

O p e r a t i o n M a n u a l

X

2

P

C R Y S T A L

engineering corporation

PN: 2975 Rev F, 3/2004
Page 2 of 24

PRESSURE is Our BUSINESS

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Contents

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

WARNING: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

CAUTION:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Zero/Tare . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Units button. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Peak detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Resetting (clearing) recorded peak values . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Disable Peak display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Automatic shut-off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Measuring Vacuum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Water Density (Inches of Water) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Overpressure Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Low battery indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Battery replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Noisy or unstable reading when used with fluids . . . . . . . . . . . . . . . . . . . . . . 9

Non-repeatability of pressure measurements . . . . . . . . . . . . . . . . . . . . . . . . . 9

Slow return to zero and/or non-repeatability of pressure measurements . . . . 9

Err 1 displayed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Err 2 displayed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Display continuously flashes all segments . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Digital Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

I/O Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Communication Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Query Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Pressure, High . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Pressure, Low . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Water Density . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Tare Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Serial Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Next Pressure Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

PN: 2975 Rev F, 3/2004

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Zero. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Clear Peaks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Water Density . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

No Auto Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Disable/Enable Peak Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Acknowledgment of a Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Troubleshooting the Digital Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Programming Tips. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

XP2 Model & Serial Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Serial Numbering System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Model Numbering System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Pressure Ranges, Display Scales & Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Media Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Pressure Conversions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Certifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

C-tick. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

European Community Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . 22

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

AC adapter kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Plastic Carrying Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

6″ Gauge Adapter Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

8½″ Gauge Adapter Kit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

LabVIEW™ drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

WinXP2 Configuration Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

How to Contact Us: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

PN: 2975 Rev F, 3/2004
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PRESSURE is Our BUSINESS

™

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Introduction

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Thank you for choosing the XP2 Digital Test Gauge from Crystal Engineering Corporation.
Your XP2 is a combination of leading edge technology and rugged industrial design.

The case, and almost all metal components, are stainless steel. Gaskets seal out dust and
water. Even the RS-232 connector (with or without the cover) is fully sealed!

Circuitry is mounted in a shock absorbing elastomer, and the batteries are easily accessible
by removing two screws. But you won’t need to change batteries often, since 3 AA batteries
operate the XP2 for up to 1500 hours of continuous use. If you are mounting the gauge in
a permanent location you might consider ordering the optional external power supply kit
(PN: 2984). With the external power supply the batteries serve as an automatic backup
supply, in case of power failure.

Other features include:

• continuous recording of peak and valley pressure readings

• a removable filter (to keep out large particles contaminants)

• all welded 316 stainless steel sensor

• can be cleaned for oxygen service

Accuracy is 0.1 percent of reading - so any XP2 can typically replace several of the range
rated gauges you may have been using. And the XP2 is fully temperature compensated ­so there is no change in accuracy throughout the entire operating temperature range!

Connect the XP2 to your system. Use pipe thread tape or pipe thread sealant on the ¼″ NPT
fitting. Always use a wrench (¾″ or 19mm) for installation and removal of XP2s! There

is a limit to how much rotational force can be applied to the case, so don’t rely on, or use,
the case to screw the XP2 into a fitting, and don’t use the case to remove the XP2
fitting, either.

To ensure safe and accurate operation, please read the following warnings:

Severe injury or damage can occur through improper use of pressure instruments!

Do not exceed recommended pressure limits of tubing and fittings. Be certain all pressure
connections are secured.

This gauge can display zero pressure with up to 200 PSI applied! Do not rely on the
display indication before disconnecting - it may not be indicating true pressure. Never

disconnect pressure instrumentation without first relieving system pressure.

Never insert any object (other than the
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.

We hope your XP2 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

XP2, 30 series pressure calibrators, MultiCal multimeter pressure adapters and a variety of

industry specific 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!™

Operating Instructions

The XP2 is shipped with batteries installed, so it’s ready to use. Press the
(on/off) button and the XP2 will test all LCD segments. Continue pressing the

button for at least one second and the XP2 will start normal operation.

one second delay avoids turning on XP2 by mistake.)

The XP2 always resumes operation in the mode and the units of the pressure last used, and
it does not automatically rezero when turned on.

(The

The XP2 can zero (or “tare”) any applied pressure up to 200 PSI (or equivalent). This
means that even if zero pressure is displayed, the actual gas or fluid pressure connected
to the XP2 may be high enough to be dangerous if you were to disconnect the XP2 without
relieving the pressure first. Always check that the pressure has been equalized with

ambient pressure before disconnecting the XP2!

To zero or tare the XP2, you must turn off peak indication, then press the
for at least ½ second before it responds. The delay avoids unintentional changes to the

zero/tare setting. The display will briefly flash all dashed lines, indicating that it has been
re-zeroed. If you attempt to tare or zero the gauge when more than 200 PSI is being applied,
the command will be ignored, and “--HI-” will be displayed.

The
icon is displayed. While a peak icon is displayed the
button.

All XP2s are intended for gauge pressure measurement. That is, they indicate the difference
between applied pressure and ambient barometric pressure. The
used as a tare function, meaning it can be set to read zero pressure at for any pressure up to
the full scale of the gauge, or 200 PSI, whichever is lower.

button can also be

PN: 2975 Rev F, 3/2004

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engineering corporation

Connect the XP2 to your system. Use pipe thread tape or pipe thread sealant on the ¼″ NPT

zero

clear

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zero

HI

LO

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clear

units

fitting. Always use a wrench (¾″ or 19mm) for installation and removal of XP2s! There
is a limit to how much rotational force can be applied to the case, so don’t rely on, or use,

the case to screw the XP2 into a fitting, and don’t use the case to remove the XP2
fitting, either.

To ensure safe and accurate operation, please read the following warnings:

WARNING:

Severe injury or damage can occur through improper use of pressure instruments!

Do not exceed recommended pressure limits of tubing and fittings. Be certain all pressure
connections are secured.

This gauge can display zero pressure with up to 200 PSI applied! Do not rely on the
display indication before disconnecting - it may not be indicating true pressure. Never

disconnect pressure instrumentation without first relieving system pressure.

CAUTION:

Never insert any object (other than the 1⁄16″ NPT metal filter) 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.

Zero/Tare

To make sure that the XP2 is performing to it’s rated accuracy, the XP2 should
be exercised and re-zeroed whenever exposed to changes in temperature (see

Specifications). It’s also good practice to check zero as your final reading too,

as the XP2 should return to a perfect zero reading. (If it does not return to zero,
check the filter - it may be blocked).

The XP2 can zero (or “tare”) any applied pressure up to 200 PSI (or equivalent). This
means that even if zero pressure is displayed, the actual gas or fluid pressure connected
to the XP2 may be high enough to be dangerous if you were to disconnect the XP2 without
relieving the pressure first. Always check that the pressure has been equalized with

ambient pressure before disconnecting the XP2!

To zero or tare the XP2, you must turn off peak indication, then press the

button

for at least ½ second before it responds. The delay avoids unintentional changes to the

zero/tare setting. The display will briefly flash all dashed lines, indicating that it has been
re-zeroed. If you attempt to tare or zero the gauge when more than 200 PSI is being applied,
the command will be ignored, and “--HI-” will be displayed.

The
icon is displayed. While a peak icon is displayed the

button changes its function when the peak high (

) or the peak low (

button becomes the

)

button.

Units button

Pressing this button causes the XP2 to select the next unit of pressure
measurement. There are up to 9 units available. See “Pressure Ranges,

Display Scales & Resolution” for the list of pressure units available for your

model.

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Peak detection

Hi

Lo

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peak

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LO

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The XP2 continuously records maximum and minimum applied pressure. To
see the recorded values, press the
appear, along with the recorded peak pressure. Press the
again and the
pressure. Pressing the

icon will appear instead, along with the minimum recorded

button once more and the display resumes

button, and the

icon will

button

normal operation, with only the current applied pressure reading displayed.

Peak high and low values are not preserved when the unit shuts off; they will reset to the
current reading when the XP2 is turned on or reset.

Resetting (clearing) recorded peak values

Peak values can only be cleared when displaying either a high or low recorded
pressure. Press the
then briefly appear across the display and both

button for at least ½ second. Dashed lines will

and

icons will flash

briefly, indicating that both peak values have been cleared. Both peak high and

low values will then display the current applied pressure. Pressing the

button while
either peak hi or peak lo icon is displayed will not affect the zero or tare value. If you need to
rezero the gauge, you must turn off both peak icons by pressing the

button.

Disable Peak display

In some cases it may be critical that the indicated pressure always be the true applied
pressure - not a stored peak high or peak low reading. For these cases the peak button can
be disabled, eliminating any possible indication of a stored reading. This feature can only
be enabled or disabled via the RS-232 interface. Refer to the Digital Interface section of the
manual for general instructions and the “Disable/Enable Peak Display” commands.

All versions of the XP2 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 certified for vacuum
operation.

When measuring pressure less than ambient barometric conditions, a minus (-) sign will
appear. XP2s are not recommended for continuous use at high vacuum (pressures less
than -14.5 PSI, at sea level). If the pressure applied is less than -14.5 PSI or equivalent,
regardless of zero or tare, the gauge will indicate overpressure (see “Overpressure

Conditions”).

The following applies only to models where inches of water are available. As shipped from
the factory, the XP2 is set to display inches of water corresponding to the density of water
at 4°C (39.2°F). You may require a different water density for your application, so the XP2
can be set to use the density of water at 20°C (68°F) or 15.6°C (60°F), instead. Changing
the setting can be accomplished via the keypad, or via the RS-232 interface (see: WinXP2

Configuration Software or refer to the Digital Interface section for instructions to change the

water density via RS-232).

To check and or change the water density setting from the keypad, turn on the XP2 by
pressing the (on/off) button and the
indicate either “4C” or “60F” or “68F”.

Press the

Automatic shut-off

The XP2 has a shutoff timer and will turn off automatically after 20 minutes of operation.
Pressing any button or sending any command via the RS-232 connection resets the shutoff
timer for another 20 minutes of operation.

The shutoff feature can be defeated, if desired, when turning the XP2 on. Pressing the
(on/off) and

buttons simultaneously will prevent the XP2 from automatically turning

off. The XP2 will briefly display the words “No Auto Off” to indicate that it will not turn off.

This procedure is required each time the XP2 is turned on, if you want to defeat the auto­shutoff.

The XP2 will read pressure up to approximately 110% of the rated pressure range. Above
110% percent of the range the display will start flashing and the readings will not be reliable.

The zero/tare function does not affect the point at which the display starts flashing to
indicate overpressure, so depending on the tare value it is possible that the display can

start flashing without the maximum pressure being displayed.

For instance, if a 100 PSI XP2 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 affect accuracy, but the effect is only temporary unless the sensor has
been destroyed. See Specifications for maximum overpressure.

The XP2 has a removable, stainless steel mesh filter, installed in
the bottom of the pressure connection. This filter is designed to
keep large particles from becoming entrapped in the sensor cavity.

If the XP2 fails to return to zero, or returns to zero or new applied
pressures slowly, the filter may be obstructed. The filter can
be removed and cleaned if necessary, by unscrewing it with a

5

air to clean it out. Or, you can purchase a replacement filter,
PN:3002.

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engineering corporation

Measuring Vacuum

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All versions of the XP2 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 certified for vacuum
operation.

When measuring pressure less than ambient barometric conditions, a minus (-) sign will
appear. XP2s are not recommended for continuous use at high vacuum (pressures less
than -14.5 PSI, at sea level). If the pressure applied is less than -14.5 PSI or equivalent,
regardless of zero or tare, the gauge will indicate overpressure (see “Overpressure

Conditions”).

Water Density (Inches of Water)

The following applies only to models where inches of water are available. As shipped from
the factory, the XP2 is set to display inches of water corresponding to the density of water
at 4°C (39.2°F). You may require a different water density for your application, so the XP2
can be set to use the density of water at 20°C (68°F) or 15.6°C (60°F), instead. Changing
the setting can be accomplished via the keypad, or via the RS-232 interface (see: WinXP2

Configuration Software or refer to the Digital Interface section for instructions to change the

water density via RS-232).

To check and or change the water density setting from the keypad, turn on the XP2 by
pressing the (on/off) button and the

button simultaneously. The display will

indicate either “4C” or “60F” or “68F”.

Press the

button until the display cycles to the desired water density, then press the

button to store the selection (this will not zero the gauge).

Overpressure Conditions

The XP2 will read pressure up to approximately 110% of the rated pressure range. Above
110% percent of the range the display will start flashing and the readings will not be reliable.

The zero/tare function does not affect the point at which the display starts flashing to
indicate overpressure, so depending on the tare value it is possible that the display can

start flashing without the maximum pressure being displayed.

For instance, if a 100 PSI XP2 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 affect accuracy, but the effect is only temporary unless the sensor has
been destroyed. See Specifications for maximum overpressure.

Filter

The XP2 has a removable, stainless steel mesh filter, installed in
the bottom of the pressure connection. This filter is designed to
keep large particles from becoming entrapped in the sensor cavity.

If the XP2 fails to return to zero, or returns to zero or new applied
pressures slowly, the filter may be obstructed. The filter can
be removed and cleaned if necessary, by unscrewing it with a

5

⁄32″ (4 mm) hex key, and using solvents and/or compressed
air to clean it out. Or, you can purchase a replacement filter,
PN:3002.

PN: 2975 Rev F, 3/2004
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Low battery indication

The battery icon ( ) is the first indication of a low battery. The XP2 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 XP2 uses 3 AA batteries*. Batteries must only be changed in a non-hazardous
area! With a small flat blade screwdriver, unscrew the two rear panel screws to gain access

to the battery compartment. After

replacing the batteries, the XP2 will

start operating immediately

(without having to press
the button). This
indicates that a complete
reset has occurred, and
is normal.

Reset

If for some reason the XP2 needs to be reset, remove any battery for at least one minute,
then reinstall the battery. If the reset is successful, the XP2 will start operating without
pressing the (on/off) button. Reset will clear the tare, peak values will be reset to the
current reading, and the XP2 will be set to the default engineering units.

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Troubleshooting

The XP2 is a very high performance gauge. Due to the high resolution of this product, 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 used with fluids

When calibrating or comparing the indicated pressure from an XP2 against a hydraulic
deadweight tester or piston gauge, the reading on the XP2 may appear unstable - the least
significant 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 fluid is acting like a spring. At higher pressures (above
2000 PSI, typically) this may eventually diminish, as the gas dissolves into the
fluid.

Solution: Evacuate all tubing with a vacuum pump, before introducing fluid 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 fluid. When

decreasing the pressure, the dissolved gas then leaves the fluid, but at an
uneven rate, so small pressure differential (due to fluid head pressure) may exist
between the reference deadweight and the gauge being tested.

Solution: Evacuate all tubing with a vacuum pump, before introducing fluid into the system.

Slow return to zero and/or non-repeatability of pressure measurements

Reason: Filter is obstructed.

Solution: Clean filter - see “Filter” section for instructions.

Err 1 displayed

Reason: The XP2 checks the integrity of internal calibration coefficients every time

it’s turned on. If any coefficients 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 XP2 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.

Display continuously flashes all segments

Reason: After a reset, and after replacing batteries, the XP2 checks the integrity of

program memory. If for some reason it has been modified or corrupted, it flashes
all segments, and prevents normal operation.

Solution: Contact factory for instructions on how to restore the memory to the original

factory settings.

PN: 2975 Rev F, 3/2004
Page 10 of 24

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Digital Interface

The XP2 can be connected to a personal computer via RS-232, using an ordinary DB9
extension cable (male DB9 for the XP2 connection, female DB9 for the PC side). The
interface lets you record displayed readings and recorded peaks. The data string always
includes the pressure units. And the XP2 can be operated remotely, as if you were pressing
the buttons. You can use a simple terminal program to send the commands, or, you can
incorporate them into your own software program.

Turn off the XP2 before connecting the RS-232 cable - if the gauge is on while connecting it
may reset, and clear the zero/tare and the recorded peak values.

I/O Settings

The serial interface settings are:

Baud Rate Parity Data Bits Stop Bits Flow Control

9600 None 8 1 Hardware (CTS/RTS)

Communication Format

Input is case-sensitive; all instructions should be sent in UPPERCASE. Instructions must be
terminated with a single carriage return (CR) character followed by an optional linefeed (LF)
character. Note that while the XP2 expects either CR or CR/LF as command termination on
its input, it always appends a CR/LF pair to its output. For reference, CR is ASCII value 13
decimal, while LF is ASCII character 10 decimal.

You have 30 seconds to complete an instruction. After 30 seconds, the XP2 will evaluate
whatever it has received and try to match it to its table of commands. Since the command is

incomplete, it will fail to match and the XP2 will return: N,Ø. (Negative acknowledgment with
no reception errors, so syntax is wrong.)

Query Instructions

All queries start with a question mark (?). Any pressure values returned are split across
two lines; the first contains a floating-point value, and the second contains the name of
the measurement unit. Each line is right-justified in a fixed width 10 character field. (Since

each line is terminated with a CR-LF pair, this means the total length of the response to a
measurement query is 24 bytes.) A decimal point will always be included with the pressure
value (for clarity) even if it is not displayed on the XP2. For example, a pressure query of a
300 PSI XP2 on the mbar scale could return a reading like this:

2478.

mbar

If the batteries are low enough to trip the low battery message, then any pressure query will
replace the pressure value with the letters “BATT”.

Pressure

?P,U Pressure returns the pressure value, followed by the pressure unit on the second

line. Example:

-7.89

mmH2O

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Pressure, High

?P,H Pressure, High returns the stored peak pressure value, in whatever pressure

units are currently being displayed.

91.3

mmH2O

Pressure, Low

?P,L Pressure, Low returns the peak low, or “valley” measurement, in the pressure

units currently being displayed.

-10.7

mmH2O

Water Density

?H2O Applies only to models with that include inches of water. Water density returns

the current density of water in terms of temperature with one of three values
possible:

_4C

60F

68F

Tare Check

?Z,U Tare Check reveals how much was subtracted from the reading to zero the

gauge, in the pressure units currently being displayed. When batteries are
installed or the XP2 is reset, the tare is cleared, and equals zero.

32.7

kPa

Range

?RNG Range, returns the pressure range of the gauge. It is returned in two, 10

character lines. The first line is the value, the second line is the engineering unit.
For example, a 100 PSI XP2 would return

100.00

PSI

Model

?MOD Return the model name, up to 20 characters long. For example, a 100 PSI XP2,

dual display would return the following:

100PSIXP2

Version

?VER Version returns the XP2’s firmware version as a 4 digit number preceded by the

letter “R”. This number is for factory use, only. This command also causes the
version to be displayed on the unit’s LCD.

Example Version Number:

R0101

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Serial Number

?SN# The serial number is returned in two strings, which are also shown sequentially

on the display. A typical example is shown below:

3

12659

Commands

The following are commands. All commands start with an exclamation mark (!).

Next Pressure Unit

!I,P This command is acknowledged with a simple “A,Ø”. To check which units were

selected, send the command “?P,U” to return the pressure value and the current
pressure units.

Zero

!ZER Zeroes the pressure readings by setting a tare value equal to the current applied

pressure. The tare cannot be cancelled, but it can be reloaded by calling this
command again. To check the tare value, send the Tare Check command

(“?Z,U”). If you want to disable the tare after enabling it, send the reset
(“!RST”) command. (Read the Reset section first to be sure you understand all

effects of performing a reset.)

Clear Peaks

!CLR Clear high and peak low values by setting them to the current live reading (which

might not be zero). For instance, if the current live reading were 253 PSI, then
both high and low peak registers would contain 253.

Water Density

!_4C Set the density of water to 4°C (39.2°F)

!60F Set the density of water to 15.6°C (60°F)

!68F Set the density of water to 20°C (68°F)

No Auto Off

!NAO Prevents automatic shutdown. Every time an XP2 is turned on, it defaults to a

shutdown schedule of 20 minutes after the last button push or the last RS-232
command. This command will return:

NO

AUTO

OFF

This message will also appear sequentially on the display.

To re-enable automatic shutdown, send the reset (“!RST”) command. (Read the

Reset section first to be sure you understand all effects of performing a reset.)

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Reset

!RST This command schedules a reset. There will be a three second pause before

the XP2 resets; during this time, no commands or queries should be sent to
the unit. When the unit resets, a product identification string, called the Boot
Signature, is sent. (See the Programming Tips section for more information.)
Some communications noise, including a serial framing error, is possible on
reset. Resetting the XP2 clears the tare (zero) value, clears the peak high and

peak low values, enables automatic shutdown after 20 minutes of inactivity

(resetting that timer to 20 minutes on reset), and selects the first pressure unit
on the XP2 (which can vary with product type, but will be consistent for each
reset operation). After a reset, you should query and/or select appropriate

measurement units using the “?P,U” and “!I,P” commands. If the reset
command fails to operate properly, or appears to “lock up” the device, contact
technical support.

Disable/Enable Peak Display

Prevent peak pressure readings from being displayed.

!NPK Prevents peaks from being displayed.

!PKS Enables peak button operation (default).

Acknowledgment of a Command

The XP2 always returns some indication to let you know a command or query was received
and acted on. For queries, the return of the measurement data is the acknowledgment.

For commands, possible acknowledgments are “A”, “N” or “X”, followed by a comma then a
single digit. The digit indicates whether there were any reception errors. The combination is
left justified.

A The XP2 understood the command and acted on it.

N The XP2 did not understand the command, due to either syntax or reception

errors.

X The command was understood, but is not implemented at this time.

Following an “A”, “N” or “X”, the single digits mean the following:

Ø There were no reception errors.

2 Buffer overflow.

4 Framing error.

6 There were both buffer overflow and framing errors

Example acknowledgment:

A,Ø Understood the command and acted on it. No reception errors.

N,4 Could not understand the command because there was a framing error.

N,Ø Could not understand the command, even though it was received without errors,

so syntax must have been wrong.

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Troubleshooting the Digital Interface

The following section gives possible reasons for various error codes.

N,Ø The “Ø” indicates there were no overrun or framing errors, so the command

was properly received. However, the “N” means the XP2 could not match it to
any allowed command. This means the syntax must have been wrong. The
command is rejected and nothing is done.

Possible reasons:

Instruction sent without a comma between “P” and “U” of the “?P,U” query.

More than 30 seconds passed to finish a command.

Line termination is incorrect; send carriage returns (CR) only, do not send line

feeds (LF).

N,2 XP2 buffer overflow, no action. In an overrun, bytes are lost, consequently the

XP2 will not be able to match the command string. If it can’t find a match, it

returns “N”.

Possible reasons:

Not enough time allowed between commands. This error should not occur if

the communication flow control is set to hardware. Check the communication
parameters. If hardware flow control is not available, wait 50 milliseconds
between receiving a complete response to a command and sending the next
command.

N,4 Framing error: Bytes were lost. Therefore, the command could not be matched.

A framing error can sometimes occur after power-on, after reset, or when the
batteries are changed; see the Programming Tips section for suggestions on
handling this.

Possible reasons:

Noise on the line either created a false start bit or obscured the stop bit.

Multiple, but infrequent, framing errors are probably due to noise on the

connection.

Frequent framing errors more likely mean the XP2 or the PC is not operating at

precisely 9600 Baud.

Occasionally, plugging the RS-232 connection into the XP2 will create a single

framing error.

N,6 Both buffer overrun (N,2) and framing errors (N,2) occurred during this

command. The “6” represents the binary OR masking of the two bits used to
indicate a buffer overrun (bit 1) and a framing error (bit 2).

Possible reasons:

Look at “Possible reasons” for troubleshooting the N,2 and N,4 error codes,

above.

PN: 2975 Rev F, 3/2004

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Programming Tips

The XP2 is a very straightforward device to communicate with, provided you follow these
tips. This advice is derived from our own experiences automating systems based on the

XP2, as well as the experiences of our users; following it will probably save you some time.

Anytime you establish (or re-establish) communications with the unit, you should use the
following initialization sequence, which will help you deal with possible noise due to reset,
etc.:

1. Reset the unit (unless you must preserve tare, peak values, etc.) by sending the

“!RST” command.

2. Wait 15 seconds.

3. Read the Bootloader Signature, even if you ignore it, to clear it from the PC’s input
buffer; see below for more details.

4. Send a carriage return to clear any noise in the XP2’s input buffer.

5. An error code, either “N,Ø” or “N,4” will be returned; this is normal (you have sent an
empty command); read it to clear it. The buffers are now reset.

6. Use the “?P,U” and “!I,P” commands to select the pressure unit you want to use.

7. IF APPROPRIATE, zero the XP2 by sending the “!ZER” command, since the tare
value will be clear.

8. IF APPROPRIATE, clear the high and low peak values to the current pressure (zero, if
you followed step 6) by sending the “!CLR” command.

9. If you are logging data, you should log the serial number of the unit for traceability
purposes by using the “?SN#” command. You should also log the product code,
hardware revision and firmware version with the “?VER” command.

10. Disable automatic shutdown with the “!NAO” command.

A quick note about the Bootloader Signature: This string contains a ten-character,
product-specific string (whose contents may vary with product revision), followed by a

carriage return and line feed (CR-LF), making the total string length 12 bytes. However,
a reset turns the RS-232 interface on and off, so it may be subject to noise; a NULL may

be received before the signature is sent, and the first character or so of the Bootloader
Signature may be corrupted. A framing error is also possible. The procedure above will
deal with this situation properly. Should you want to parse the bootloader signature, it has

the following format: “=XP2 BLxy=” where x and y will vary with product revision. The
bootloader signature is used by the firmware upgrade tool, but should NOT be used to

identify the firmware version; use the “?VER” command for that purpose. If you have a
system that may have Crystal DTG or XP2 units attached, you can use this signature to
determine which device is in use.

NOTE: Any time you detect the Bootloader Signature, the unit has been reset, or
disconnected from and reconnected to power; turning the unit on and off with the button will
not send the Bootloader Signature. You can use this behavior to detect a battery change, or
a problem with the XP2.

Some commands may take up to 500 milliseconds to return a reply. You should always wait
at least 50 milliseconds after each reply is received before sending the next command if you
are not using hardware flow control. After a reset command it may take up to 15 seconds
before the gauge resumes normal operation.

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The XP2 uses RTS/CTS hardware flow control, but only the CTS line is used; since the XP2

units

peak

units

peak

zero

only produces output when requested to do so, this is unlikely to cause a problem.

Data transmitted from the XP2 will always be 7-bit ASCII. Any high-ASCII characters indicate
a line-noise problem, or a problem with the XP2 or PC.

The XP2 has very thorough integrity checks to catch corruption of program or calibration
data memory. Should the data memory integrity check fail, the unit displays “ERR 1” on
the display as the value line of the serial output. It is important to check for this, or you may
mis-parse that line as “1 PSI”, depending on your program. Should the program memory
integrity check fail, the unit will continuously reset, blinking the LCD on and off, and the serial

output will alternate between the bootloader signature and a line reading “CRC FAIL”.
This condition can be recovered from, in the field, by reloading the unit’s firmware; contact
technical support for details.

Calibration

If adjustment is required, we recommend returning the unit to the factory. Factory service
offers benefits you won’t find anywhere else. We have the facilities to test your gauge at a
variety of temperatures utilizing NIST traceable standards, resulting in calibration certificates
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 XP2 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 XP2 to Crystal Engineering for calibration, ordinary
recertification and/or adjustments may be performed by any qualified personnel with
appropriate training and equipment. The following instructions are ONLY intended
for such qualified personnel with appropriate test equipment. We recommend that
the calibration standards used have a minimum rated accuracy of 0.025% of reading,
or equivalent in terms of percent of full scale. This level of accuracy requires 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 XP2 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
adjustment can be made with or without a computer (see: WinXP2 Configuration Software).

“Zero” the XP2, then record displayed pressure for two or more pressure points. Determine if
the XP2 would benefit from an overall increase or decrease of the indicated pressures.

To change the userspan factor from the keypad, turn off the XP2, then press the (on/

off),

displayed, followed by the word “cal”, followed by the actual userspan value. The userspan
factor may be adjusted by pressing either the
decrease the value, respectively. The value changes in 0.0001 increments. Press the
button to store the new value in memory, or the (on/off) button to cancel the change.

and

buttons simultaneously. The firmware version will be briefly

or

button to increase or

Note: Changing the userspan value causes the XP2 to reset. After the reset, the XP2 will
have to be re-zeroed. Remove any applied pressure and zero the gauge. Then check to see
if the adjustment was correct and achieved the desired effect.

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XP2 Model & Serial Numbers

The model number and serial number of your XP2 are located behind the battery cover
under a battery.

Serial Numbering System

Serial Numbers consist of 6 numbers, with the left most digit representing the year of
manufacture. For example: 430117 was manufactured during 2004.

Model Numbering System

(prefix)XP2(options)

Prefix: Pressure range and units - see table on next page

Options: (None), standard

-RP, Rear Pressure Connection

-F4, Panel Mount Flange for 4½″ gauge cutout

-O, Cleaned for Oxygen Service

All Panel mounted gauges (-F4) include the rear port pressure connection. Any version may
be ordered with the (-O) option (Cleaned for Oxygen Service). Shown below are the -RP and

-F4 options.

-RP -F4

Rear Pressure Fitting Panel Mount Flange

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(1)

(4)

kPa models can display pressure in kPa and Bar (or mBar), only. PSI and bar models have all available units.

(3)

Max PSI, max Bar and max kPa are the maximum pressures the gauge can withstand without damage. The gauge will not indicate

pressure up to this number.

(2)

Pressure units not desired may be disabled via RS-232, using optional WinXP2 configuration software.

XP2s will indicate pressure up to 10% above this number. Above 110% of this rating the XP2 display will flash, indicating that the applied

pressure exceeds the calibrated pressure range, and that the displayed pressure may not be accurate.

10KPSI 10000 15000 700BAR 700 1000 70KKPA 70000 100000 1 0.01 1 0.01

5KPSI 5000 7500 300BAR 300 450 30KKPA 30000 45000 0.1 0.01 1 1 0.01

3KPSI 3000 4500 200BAR 200 350 20KKPA 20000 35000 0.1 0.01 0.1 1 0.01

2KPSI 2000 4500 140BAR 140 350 14KKPA 14000 35000 0.1 0.01 0.1 1 0.01

1KPSI 1000 2000 70BAR 70 140 7KKPA 7000 14000 0.1 0.001 0.1 0.1 0.001

500PSI 500 1000 30BAR 30 70 3KKPA 3000 7000 0.01 0.001 0.1 1 1 0.1 0.001 1

30PSI 30 100 2BAR 2 7 200KPA 200 700 0.001 0.0001 0.001 0.01 0.1 1 0.01 0.0001 0.1

15PSI 15 100 1BAR 1 7 100KPA 100 700 0.001 0.0001 0.001 0.01 0.01 1 0.01 0.0001 0.1

100PSI 100 200 7BAR 7 14 700KPA 700 1400 0.01 0.0001 0.01 0.1 0.1 1 0.01 0.0001 0.1

300PSI 300 600 20BAR 20 42 2KKPA 2000 4200 0.01 0.001 0.01 0.1 1 0.1 0.001 1

Prefix

PSI

PSI

Prefix

bar

bar

Prefix

Part #

Range

(2)

max

(3)

Part #

Range

(2)

max

(3)

Part #

Pressure Ranges, Display Scales & Resolution

PSI Bar kPa

Range

kPa

(2)

kPa

(3)

(4)

max

PSI kg/cm

2

inch

Hg

inch

H

2

O

mm

Hg

mm

H

2

O kPa

(4)

Bar

(4)

mBar

(4)

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Specifications

Accuracy specifications are for one year, and include all effects of linearity, hysteresis,
repeatability, and temperature within the specified operating temperature range.

The gauge must be exercised and re-zeroed whenever exposed to significant changes in
environmental conditions to achieve these specifications. 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 recertification period.

Accuracy

20 to 100% of Full Scale: ±0.1% of reading

0 to 20% of Full Scale: ±0.02% of Full Scale

Vacuum*, for 2000 kPa (300 PSI) and lower pressure gauges:

0 to -14.5 PSIG (0 to -99.9 kPa): ±0.25% of Full Scale,

where F.S. = -14.5 PSI (-99.9 kPa)

*Not specified for 500 PSI/ 30 bar/ 3000 kpa 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: -20°C to +70°C (-4°F to +158°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 316 Stainless Steel.

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

PN: 2975 Rev F, 3/2004
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Connection

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PSI inH

2

O inHg kpa

mmHg mmH

2

O mbar kgf/cm

2

LO

HI





C R Y S T A L

engineering corporation





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

Pressure Fitting: ¼″ male NPT with integral 1/16″ NPT stainless steel filter.

Enclosure

Stainless steel, designed to meet NEMA4 and IP66.

Weight: 500g (17.6 oz.), including batteries.

Batteries: 3 x AA, alkaline recommended

The XP2 can be operated from an external power supply (AC adapter kit PN: 2984).

Battery Life: 1500 hours continuous operation

Low Battery Indicator: Battery Icon ( )

Dead Battery Indication: “batt”

The XP2 has been tested and certified to comply with a variety of international standards.

PN: 2975 Rev F, 3/2004

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engineering corporation

Power

Batteries: 3 x AA, alkaline recommended

The XP2 can be operated from an external power supply (AC adapter kit PN: 2984).

Battery Life: 1500 hours continuous operation

Low Battery Indicator: Battery Icon ( )

Dead Battery Indication: “batt”

Certifications

The XP2 has been tested and certified to comply with a variety of international standards.

C-tick

This XP2 complies with the Australian requirements for the C-tick mark. The
instrument was tested against AS/NZS 3584, C-tick EMC/EMI requirements.

PN: 2975 Rev F, 3/2004
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PRESSURE is Our BUSINESS

™

European Community Declaration of Conformity

EC Declaration of Conformity

I/We

Crystal Engineering Corporation

of

720 Aerovista Place, Suite B
San Luis Obispo, CA, 93401
USA

declare that

Digital Pressure Gauge
XP2 Series (Battery or DC Power Supply Accessory)

In accordance with the following directives

89/336/EEC The Electromagnetic Compatibility Directive

and its amending directives

has been designed and manufactured to the following specifications

EN 61326-1:2002 Conducted Emissions Class A Pass
EN 61326-1:2002 Radiated Emissions Class A Pass
EN 61000-3-2:1995 Current Harmonic Emissions Class A Pass
EN 61000-3-3:1995 Voltage Variations & Flicker N/A Pass

EN 61000-4-2:2002 Electrostatic Discharge Exceptions (1)
EN 61000-4-3:2002

Radiated EM Field Pass (2)

EN 61000-4-4:2002

Electrical Fast Transient/Burst

Pass

EN 61000-4-5:2002

Surge Immunity

Pass

EN 61000-4-6:1994

RF Conducted Disturbances

Pass

EN 61000-4-8:1994

Power Magnetic Field

Pass

EN 61000-4-11:1994

Voltage Dips and Interruptions

Pass

(1) System meets requirements for Vertical Coupling Plane and Horizontal Coupling Plane; Air and Contact meets performance

criteria B when referenced to ground, criteria C when no ground reference present.

(2) Unit performs as advertised for standard battery configuration. Unit when attached to RS232 cable performs to performance

criteria B. Improved performance observed using L-Com Capacitive Filter (EMC) Adaptor, DB9 male/female, part number

DGFC9MF.

I hereby declare that the equipment named above has been designed to comply with the
relevant sections of the above referenced specifications. The unit complies with all essential
requirements of the Directives

David K. Porter, P.E.

(NAME OF AUTHORIZED PERSON)

Director of Engineering

(TITLE OF AUTHORIZED PERSON)

16 July 2003

(SIGNATURE OF THE AUTHORIZED PERSON) (DATE OF ISSUE)

PN: 2975 Rev F, 3/2004

Page 23 of 24

C R Y S T A L

engineering corporation

Accessories

AC adapter kit

P/N 2984: Permits operation of an XP2 from an AC supply of 90 - 264 VAC and 47 - 63 Hz.

Includes interchangeable international plugs (for USA, Europe, U.K., and Australia). Adapter
will not charge batteries, but in the event of AC power loss, XP2s will automatically revert to
battery operation.

Plastic Carrying Case

P/N 3009, 35.6 cm (14″)L x 27.9 cm (11″)W x 8.3 cm (3¼″)H with egg-shell foam interior.

6″ Gauge Adapter Kit

P/N 2955: Adapts the 4½″ Panel Mount (F4 option) to fit into a 6″

gauge cutout.

8½″ Gauge Adapter Kit

P/N 2956: Adapts the 4½″ Panel Mount (F4 option) to fit into an

8½″ gauge cutout.

Software

LabVIEW™ drivers

Control and communicate with XP2s using National Instrument’s LabVIEW. Integrate XP2s
into your test environment!

WinXP2 Configuration Software

WinXP2: Disable unwanted pressure units, set default pressure units, change water density,

disable Peak button and adjust calibration, via the RS-232 interface.

Replacement Parts

The only user-replaceable parts are the batteries and the 1/16″ NPT stainless steel filter (Filter
Replacement Kit P/N: 3002).

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.

Warranty

Crystal Engineering Corporation warrants the XP2 Digital Test 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 NO WARRANT Y OTHER THAN
THE LIMITED WARRANTY STATED ABOVE. ALL WARRANTIES, INCLUDING IMPLIED
WARRANTIES OF MERCHANTABILITY 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 specific 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]

© 2002, Crystal Engineering Corporation

708 Fiero Lane, Suite 9

San Luis Obispo, CA 93401-8701

PN: 2975 Rev F, 3/2004
Page 24 of 24

PRESSURE is Our BUSINESS

™