Crystal Engineering WT Operating Manual

WT Series

Operation Manual

for the WT Series Digital Test Gauge

Contents

Overview ............................................................. 1

Introduction .......................................................... 1

Operating Instructions ................................................. 2

Functions ............................................................ 3

Enclosure ........................................................... 10

Serial Numbers ....................................................... 10

Speciﬁcations ...................................................... 11

Power ................................................................ 12

Pressure Ranges, Display Scales, & Resolution .......................... 13

Part Numbering System ............................................... 13

Support .............................................................. 14

Troubleshooting ...................................................... 14

Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Software ............................................................. 16

Replacement Parts .................................................... 16

Accessories ........................................................... 16

Factory Service ....................................................... 17

Trademark ........................................................... 17

Warranty ............................................................. 17

Overview

INTRODUCTION



Thank you for choosing the WT Series Digital Test Gauge from Crystal Engineering Corporation. The WT Series is a combination of leading edge technol-

ogy and rugged industrial design. The WT Series Digital Test Gauge is designed to t in 8" or 10" panel mount applications commonly found in portable test

. The WT Series is based on the Crystal Engineering Corp. model XP2i digital pressure gauge. The WT Series pressure gauge has been repackaged so that it

sets

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 there is no change in accuracy throughout the entire operating temperature range!

sated

The WT Series’ case is made from rugged aluminum alloy utilizing a gasket to seal the enclosure against dust and water intrusion. Even the RS-232 connector

is fully sealed (with or without the red cover or rubber boot). Circuitry is mounted in shock absorbing elastomer supports and the batteries are easily acces-

sible by removing four screws. But you won’t need to change the batteries often, since 3 AAA batteries provide up to 500 hours of continuous operation. The

tteries are easily replaced by removing the two screws. Other features include:

Continuous capture of peak and valley pressure readings

•

PSV mode

•

Programming interface

•

User-dened units

•

All welded 316 stainless steel sensor

•

so any WT Series can typically replace several gauges you may have been using. The WT Series is fully temperature compen-

Overview  1

Your WT Series can be customized, through

the use of our free CongXP™ software. Your

personal computer can disable, enable, or

modify a variety of features of your WT Series.

Look for the

logo for programmable features, like:

We hope your WT Series meets your expectations, and we're interested in any comments or suggestions you may have. You can send us a note at:

crystal@ametek.com. Many features in this and our other products are a direct result of your comments!

rystal Engineering is the company that designs, manufactures, markets, and services the nVision reference pressure recorder, XP2i, and 30 series pressure

calibrators, M1 Pressure Gauge, MultiCal multimeter pressure adapters, and a variety of industry speci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:

™

A user dened pressure scale, and/or disable

•

unused pressure units

Password protection to prevent

•

unauthorized changes

Disable keypad recalibration, (peak)

•

button, and/or

Expand or decrease allowable Zero range

•

Set the gauge to a dierent density of water

•

factor (4° C, 60° F, or 68° F)

Store a 12 digit ID or tag number in

•

non-volatile memory

Adjust calibration values

•

(units) button

WT Series Operation Manual

OPERATING INSTRUCTIONS



The WT Series is shipped with batteries installed, so it’s ready to use. Press and hold the (on/o) button. The WT Series will rst test all LCD seg-

ments. Release the

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

Connect the WT Series to your system.

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

WARNING: Severe injury or damage can occur through improper use of pressure instruments! Do not exceed recommended pressure limits of tubing

Most WT Series are intended for gauge pressure measurement. That is, they indicate the dierence between applied pressure and ambient barometric pres-

sure. However, the

factory default setting limits the maximum zero value to 20 PSI, but this limit can be changed with

Some WT Series are rated for absolute pressure. Absolute gauges indicate the dierence between applied pressure and an internal vacuum reference. Abso-

lute 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 lo

possible to indicate a negative or positive gauge pressure.

objects. Cleaning of the sensor must be done with appropriate solvents only.

and ttings. Be certain all pressure connections are secured.

(zero) button can be used to force a WT Series to read zero pressure at any applied pressure, up to the full scale rating of the gauge. The

west expected pressure indication. However, absolute gauges can be “zeroed” (unless prevented by CongXP). After zeroing an absolute gauge it is

(on/o) button when the WT Series indicates pressure.

Overview  2

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 pressure. Never disconnect pressure instrumentation without rst relieving system pressure!

WT Series Operation Manual

Functions

units

Units Button

Pressing this button causes the WT Series to select the next available unit of pressure measurement.

See Pressure Ranges, Display Scales, & Resolution on page 13 or the list of pressure units available for your model.

Units that you don’t need or never use can be turned o. You can also dene a special unit for your WT Series with CongXP.

You can use the WT Series to display directly in a unit not otherwise available, such as feet of seawater, or foot-pounds of torque. When you select your custom

unit from the keypad, the screen displays the USER icon.

Peak Button

peak

Functions  3

On the WT Series, pressing the (peak) button causes the display to cycle

through the following , depending on your setting in CongXP.

<No Icon> . . . . Live Pressure display

. . . . Maximum detected pressure

. . . . Minimum detected pressure

(blinking)

. . . . PSV Mode, maximum

. . . . PSV Mode, minimum

Average pressure

. . . .

. . . . DataLoggerXP datalogging mode

* From the factory this setting is disabled. Use CongXP to enable.

Peak High and Peak Low values are not saved when the gauge shuts o; they will reset to the current

reading when the WT Series is turned on or reset.

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.

The WT Series can average 1 to 10 readings, recalculated every time pressure is measured (4 times per

second). Enable and set the number of readings to be averaged with CongXP.

On the -DD, dual-line display WT Series, pressing the

through the following, depending on your setting in CongXP:

<No Icon> . . . . Live Pressure display

. . . . Maximum detected pressure

. . . . Minimum detected pressure

(blinking)

. . . . PSV Mode maximum

. . . . PSV Mode minimum

. . . . Average pressure

. . . . DataLoggerXP datalogging mode

(remaining points displayed on lower line)

. . . . Tare

. . . . Rate of change

. . . . Dierential Mode

. . . . Average Dierential Mode

(peak)

button causes the display to cycle

WT Series Operation Manual

Resetting (Clearing) Recorded Peak Values

zero

clear

Peak values can only be cleared when displaying either a Peak High or Peak Low recorded pressure. Press the (clear) button for at least ½ second. Dashed

lines will briey appear across the display indicating that both Peak values have been cleared. Both Peak High and Peak Low values will then display the

current applied pressure. Pressing the

(clear) button while either the Peak High icon (

value. If you need to rezero the gauge, you must turn o both peak icons by pressing the

) or the Peak Low icon (

(peak) button.

) is displayed will not aect the zero

Zero

clear

If you attempt to zero the gauge while applying a pressure which exceeds the Zero Limit (set in CongXP, defaults to 20 PSI),

the command will be ignored and - - HI - will be displayed.

To Zero the WT Series

Turn o peak indication by pressing the (peak) button repeatedly until the Peak High icon (

button for at least ½ second when the gauge is vented to atmosphere.

) and Peak Low icon (

) are o. Then press the (zero)

Functions  4

The display will then briey ash all dashed lines (

WARNING: This gauge can display zero pressure when connected to a source of pressure! Do not rely on the display indication before disconnecting—

), indicating that it has been re-zeroed. Absolute gauges will now indicate gauge pressure.

it may not be indicating true pressure. Never disconnect pressure instrumentation without rst relieving system pressure!

To Clear the Zero Value on the WT Series

Turn o peak indication as described above, then press and hold the (zero) button until the display changes from (

) to (

This is especially useful for absolute gauges that have been zeroed to use for gauge pressure measurement.

WT Series Operation Manual

+ 14 hidden pages