Omega DPG8001 User manual

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DPG8001
M-5103/0217
General Purpose Digital Pressure Gauge
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User’s Guide

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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: [phone] Fax: [phone]
e-mail: [email protected]
For Other Locations Visit omega.com/worldwide

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m
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.
m
m
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

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4. GENERAL INFORMATION:
Keypad:
aPower On-Off / Enter U
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
a
bd
c
➟
➟

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a
7
b
ef 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.

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Key presses designated as long (greater than
0.5 sec.) are indicated by “
➟
” ICON
Turn the Gauge ON/OFF
Press U
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

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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
MENU
➟
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
U
u
|
|➟
to access that parameter.
4. If at any time you choose to EXIT the
menu mode (or sub-menu mode) hold
U
MENU
➟
. 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
u
|
|➟
.
2. Choose engineering units by scrolling
U
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
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
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
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➟
to
change the value of the digit between 0-9.
Once the desired value is displayed, press
the U
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
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
U
MENU
➟
. If the user exits the menu by
a U
MENU
➟
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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