Omega DPG8001 Manual de usuario

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DPG8001

M-5103/0217

General Purpose Digital Pressure Gauge

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User’s Guide

The information contained in this document is believed to be correct, but OMEGA accepts no liability for any errors it contains, and reserves

the right to alter speciﬁcations without notice.

omega.com [email protected]

Servicing North America:

U.S.A. Omega Engineering, Inc.

Headquarters: Toll-Free: 1-800-826-6342 (USA & Canada only)

Customer Service: 1-800-622-2378 (USA & Canada only)

Engineering Service: 1-800-872-9436 (USA & Canada only)

Tel: (203) 359-1660 Fax: (203) 359-7700

e-mail: [email protected]

For Other Locations Visit omega.com/worldwide

remain full (if possible), pumps should be

brought up to power slowly, and valves

opened slowly. To avoid damage from both

ﬂuid hammer and surges, a surge chamber

should be installed. Symptoms of ﬂuid ham-

mer and surge’s damaging effects:

• Digital Gauge exhibits large zero offset.

• Digital Gauge pressure display remains

constant regardless of pressure

• Error code is displayed on screen.

FREEZING:

Prohibit freezing of media in pressure port.

Unit should be drained. (Mount in vertical

position to prevent possible overpressure

damage from frozen media.)

3. INSTALLATION:

This procedure requires the use of a 11⁄16˝

(27mm) hex wrench for tightening the in-

strument to the process connection. Apply

Teﬂon tape or a suitable sealing compound

to NPT threads of the gauge. Take using

the wrench, tighten 1 turn beyond hand-

tight or until a leak-proof seal has been

achieved.

Caution: Tightening the product

by grasping or putting a tool on the

plastic housing can cause permanent

damage to the product.

WARNING! READ BEFORE INSTALLATION

1. GENERAL:

A failure resulting in injury or damage may be

caused by excessive overpressure, excessive

vibration or pressure pulsation, excessive

instrument temperature, corrosion of the

pressure containing parts, or other misuse.

Consult Omega Engineering before installing

if there are any questions or concerns.

2. OVERPRESSURE:

Pressure spikes in excess of the rated over-

pressure capability of the gauge may cause

irreversible electrical and/or mechanical

damage to the pressure measuring and con-

taining elements. Fluid hammer and surges

can destroy any pressure transducer and

must always be avoided. A pressure snubber

should be installed to eliminate the damaging

hammer effects. Fluid hammer occurs when

a liquid ﬂow is suddenly stopped, as with

quick closing solenoid valves. Surges occur

when ﬂow is suddenly begun, as when a

pump is turned on at full power or a valve is

quickly opened.

PRESSURE SURGES:

Surges are particularly damaging to pres-

sure gauges if the pipe is originally empty.

To avoid pressure surges, ﬂuid lines should

4. GENERAL INFORMATION:

Keypad:

aPower On-Off / Enter U

bZero / Up Arrow / Tare U

ZERO CTare

cMenu Selection / Down / Backlight Arrow U

MENU D

dKey presses are short less than 0.5 seconds or long greater than 0.5 seconds

Note: Key presses designated as short (less than 0.5 sec) are indicated by “➟

” ICON

➟

c d

LCD DISPLAY:

LCD functions:

a5 numerical digits for pressure display.

b20 segment pressure range bar graph – each segment equals 5% of range.

c Sleep and Backlight Timer symbols.

dMaximum / Minimum Pressure and Tare icons.

e5 character alpha-numeric digit display.

f4 segment battery life indicator.

7Negative pressure indicator.

Key presses designated as long (greater than

0.5 sec.) are indicated by “

➟

” ICON

Turn the Gauge ON/OFF

Press U

➟

key to turn instrument ON

/ OFF. When initially turned ON, the display

will momentarily show all LCD segments lit,

product version and full scale range; the unit

will then proceed automatically to the Measure-

ment Mode.

Zero Function:

Press U

ZERO

➟

. Upon release, the numeric

display momentarily disappears and “ZERO”

shows in alpha display, then returns to mea-

surement mode. The pressure should now read

0. Zero value is stored in memory.

Note 1: A display message of “RLOCK” indi-

cates that zero is more than ±5% from factory

calibration. Zeroing is not possible.

Note 2: A message of “ZLOCK” indicates that

zero lock function is activated.

Tare Function:

Subtracts current pressure value from value

displayed in Measurement mode.

In Measurement mode, apply desired pressure

press U

ZERO ➟

, to enable the tare function. The

display will quickly ﬂash “TARE”, then the

“TARE” icon will be displayed and the pressure

reading will blink. The unit should now read

0. Press U

ZERO

➟

the TARE key ICON again to

disable the function. The display will quickly

ﬂash “T OFF”, then the “TARE” icon will disap-

pear and the pressure reading will no longer be

blinking. The unit will now return to measure-

ment mode.

Programming:

To enter menu mode

1. Press U

➟

and release to proceed

to programming mode.

2. Press U

C, U

D ➟

, to scroll through pro-

grammable menu options.

3. When desired option is reached press

|➟

to access that parameter.

4. If at any time you choose to EXIT the

menu mode (or sub-menu mode) hold

➟

. Your work will not be saved.

Programmable Parameters:

Units of Measure:

1. In Menu mode, press U

C, U

D➟

, to

scroll to “UNITS”, press U

|➟

2. Choose engineering units by scrolling

C, U

D➟

, until desired unit is dis-

played, “PSI, BAR, kg/cm, kPa, mPa,

FtH2O, InHg, cmHG, mmHg, customer

deﬁned units (CUSTU)”.

3. Press U

|➟

to select units and return

to Measurement Mode.

Note: Custom units programming, see page 8.

Engineering units available will vary

based on full scale pressure range.

Custom Units of Measure

Allows a user to deﬁne a custom unit of mea-

sure, user must enter the full scale value of the

desired reading, which can be done as follows.

1) In Menu Mode press U

C, U

D➟

select

“CUSTU” press U

|➟

2) Select decimal point location:

The alphanumeric display shall show “SELDP”

The ﬁrst screen to appear will show all digits

lit up as “5” and the rightmost decimal point

will blink (5 5 5 5.5) unless the custom units

feature had been used previously. If it had

been used, the digits and decimal point

position shall correspond to the last values

set. Use the U

C, U

D➟

keys to move the

decimal point to the left or the right. Once

the decimal point is in the desired position,

press U

|➟

to lock it in place. When the

key is released the display reads “DIGIT”.

3) Choose full scale value:

The alpha numeric display shall show “DIGIT”.

The next screen will continue to show all

digits as “5”, with the leftmost digit blinking

and the decimal point ﬁxed in the previously

chosen position. However, if the custom

units feature has been used previously, then

the digits shall correspond to the last value.

The decimal point remains at the location

chosen in step 1. Press U

C, U

D➟

change the value of the digit between 0-9.

Once the desired value is displayed, press

the U

|➟

button to lock it in place. Now

the next digit to the right will begin blinking.

Repeat this procedure for all 5 digits. When

the U

|➟

is pressed and released with

the ﬁfth digit ﬂashing, the gauge will brieﬂy

display “DONE” then return to measurement

mode and display “CUSTU” along with the

numeric readings to signify that the feature

is use.

The user can optionally exit at any point

before the enter key is pressed with

➟

. If the user exits the menu by

a U

➟

before completing step 2 or

there is a menu timeout, then whatever the

user entered will be lost.

Note: The custom units feature is not avail-

able with compound pressure ranges.

Note: The bar graph uses the factory default

setting when custom units are used.

Note: The magnitude of the value entered

when using the custom units feature can

signiﬁcantly increase the noise on the

display, which can affect the zero and tare

functions as well as the stability of the pres-

sure reading displayed. If required, consult

factory for recommended limitations on full

scale input.

Maximum / Minimum:

Displays maximum / minimum pressure values;

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