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Serving 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: info@omega.com
For Other Locations Visit
omega.com/worldwide
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.
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USER MANUAL
The Precision Absolute Manometer is a microprocessor based
PRECISION ABSOLUTE MANOMETER
pressure sensing device used to directly measure pressure
relative to absolute zero. Model HHP360-A measures pressure
from 0 – 17.403 PSIA and model HHP360-B measures
pressure from 0 – 38.674 PSIA. Pressure can be displayed in a
variety of English and S.I. engineering units. All HHP360s
include a Tare function, a Min/Max function, selectable damp
rates and altitude displayed in feet or meters. The HHP360
can also display barometric pressure corrected to sea level.
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Table of Contents
User Interface ............................................................ 5
Keypad Functions .................................................. 5
ON/OFF & BACKSPACE KEY ................ 5
MIN/MAX & UP ARROW KEY .............. 5
TARE & DOWN KEY .............................. 6
PRGM & ENTER KEY.............................. 6
BACKLIGHT KEY ........................................ 6
Zeroing the Manometer ......................................... 7
Program Mode ..................................................... 12
Units Select ......................................................... 13
Displaying Altitude (US Standard Atmosphere
1962) ................................................................... 14
Display User Defined Altitude ............................ 15
Pressure Corrected to Sea Level .......................... 17
Damp Rate Select ................................................ 19
User Info Select ................................................... 20
Auto Shut-Off ...................................................... 21
Lockout Select ..................................................... 22
Header Name ....................................................... 23
Contrast Select..................................................... 24
Data Logging ....................................................... 25
Leak Test ............................................................. 26
Re-Calibration ......................................................... 27
Re-Calibration – 1 Point EDIT and START ....... 28
Re-Calibration – 5 Point EDIT ............................ 29
Re-Calibration – 5 Point START ........................ 30
Re-Calibration – Restore Factory Defaults ......... 31
Specifications .......................................................... 32
Certification / Safety / Warnings ............................. 33
Changing the Batteries ............................................. 33
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User Interface
Keypad Functions
ON/OFF & BACKSPACE
Turns the manometer on and enters the unit into the Measure
Mode. Pressing the key while in the Measure Mode turns the unit
off. It a lso serves as a backspace key when editing in the Program
Mode. The key takes the user out of a programmable register
without changing the previous setting. Pressing this key repeatedly
will return the user to the Measure Mode and then shut off the
manometer.
MIN/MAX & UP
In the Measure Mode activates the Min/Max function of the
manometer. When activated the minimum value is displayed on the
upper left of the display and the maximum value on the upper right.
This key also deactivates and resets this function. The key is
used to scroll through the programmable registers when the unit is
in the Program Mode. Once a programmable register is selected
the key can be used to edit that register.
KEY
ARROW KEY
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TARE & DOWN KEY
In the Measure Mode toggles on/off the Tare function. The Tare
function is designed to set the display value to “0”. With Tare
activated, the letter “T” appears in the lower left of the display.
The key is used to scroll through programmable registers with
the unit in the Program Mode. Once a programmable register is
selected the key can be used to edit that register.
PRGM & ENTER
Puts the manometer into the Program Mode from the Measure
Mode. When in the Program Mode, pressing this key selects the
programmable register to be edited (with prompt for password if
Lockout is set). After the register has been edited, pressing the
PRGM key enters the new setting into the manometer’s nonvolatile memory. This key also acts as a key when editing user
input such as the header name and user units.
BACKLIGHT KEY
The BACKLIGHT key, represented by the standard light bulb
symbol, toggles the display backlight between green and off.
KEY
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Zeroing the Manometer
The HHP360 is a stable and precise instrument. However, on
occasion the handheld should have a new zero taken. This is done
to remove zero drift that can occur since it was last zeroed. The
HHP360 can be zeroed only if the new applied zero is within ± 1%
FS of the original factory calibration zero. This prevents accidental
zeroing at atmospheric pressure or other relatively high pressures.
If outside this limit a “ZERO RANGE ERROR” message appears
and the manometer will not zero.
The HHP360 provides three mechanisms for re-zeroing:
1. Referenced to Absolute Zero: This traditional and
preferred method takes a “snapshot” of the measured
pressure when a vacuum of less than 100 microns
Absolute is applied to the sensor.
2. Factory Zero: This method restores the calibration curve
to the original zero taken at the factory. Note that this
feature is intended for comparison purposes, and should
not be used for real pressure measurement, as any zero-
drift will not be compensated.
3. User-Adjusted Zero: This method allows the user to
enter any pressure value when a known reference is
applied (for example, the local barometer). The
manometer will compare its actual measured value with
the entered value, and calculate a new zero reference
based on the offset.
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Keystroke
Display
1. Press ON/OF button.
The display briefly shows the
are displayed.
2. Connect the HHP360 to
or less.
3. Pull a full vacuum.
Display should read close to
zero. (See note on next page)
4. Press MIN/MAX and
Top line of display reads
“REF TO ABS ZERO”
5. Press the PRGM key.
Top line of display reads “ZERO
Measure Mode.
1. To zero the manometer using Referenced to Absolute Zero,
start with the unit turned OFF and use the following
keystroke sequence:
header name and full scale range
of the unit in the last engineering
units selected. The manometer
then goes into the Measure
Mode where the applied pressure
and engineering unit of measure
a vacuum source capable
of a vacuum of 100
microns absolute pressure
TARE keys at the same
time. (See figure 1 below.)
“ZEROING SOURCE:”
Bottom line of display reads
IN PROGRESS” while bottom
line counts down from 9. Zeroing
is complete when unit returns to
Figure 1
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Keystroke
Display
1. Press MIN/MAX
figure 1 above.)
Top line of display reads
ABS ZERO”
2. Press ▲ or ▼ arrow
line.
Bottom line of display
3. Press the PRGM
key.
Zeroing is complete when unit
returns to Measure Mode.
2. To zero the manometer using Factory Zero, start with the
unit turn ON and in Mea sure Mode and use the following
keystroke sequence:
and TARE keys at
the same time. (See
key until desired
zero function is
shown on the bottom
NOTE: The HHP360 can be zeroed only if the new applied zero is
within ± 1% FS of the original factory calibration zero. If outside
this limit a “ZERO RANGE ERROR” message appears and the
manometer will not zero. Contact the factory for support in this
case.
“ZEROING SOURCE:” Bottom
line of display reads “REF TO
reads “FACTORY ZERO”
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Keystroke
Display
3. To zero the manometer using User-Adjusted Zero, start with
the unit turn ON and in Measure Mode and use the
following keystroke sequence:
1. Apply a known,
accurate pressure
source. This may be
true atmospheric
pressure, with known
reference defined by a
local barometer.
2. Press MIN/MAX and
TARE keys at the
same time. (See figure
1 above.)
3. Press ▲ or ▼ arrow
key until desired zero
function is shown on
the bottom line.
4. Press the PRGM key.
5. Press any of ▲ or
arrow key or the
PRGM key to begin
editing.
Example: set current
pressure value to 29.5
inHg @ 0º C.
Top line of display reads
“ZEROING SOURCE:”
Bottom line of display reads
“REF TO ABS ZERO”
Bottom line of display reads
“USER ADJ. ZERO”
Top line of display shows the
current non-zero compensated
pressure value. Bottom line of
display shows the same value,
along with the engineering unit.
Top line of display continuously
updates. Bottom line of display
data is ready for editing; the first
digit is blinking.
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6. Press the ▲ or ▼ arrow
key to set the first digit
to 0.
Using the UP arrow key
the character sequence is
0 - 9, (-) negative, (.)
decimal point. The (-)
sign is used if your
location is below sea
level.
7. When the digit is
correct, press the PRGM
key.
If an error is made use
the backspace ◄ key to
move the cursor back to
the incorrect digit. Press
the UP ▲ or DOWN ▼
arrow keys to display
the correct value.
8. Continue this process
until the display reads as
shown at right.
9. Press the PRGM key to
enter the final digit.
Note that the User Adjusted Zero feature will not accept entries in
altitude units (FEET or METERS). When the current engineering
unit is FEET, the User Adjusted Zero function will automatically
prompt for an entry in Inches of Mercury @ 0º C. When the
current engineering unit is METERS, the User Adjusted Zero
function will automatically prompt for an entry in Millimeters of
Mercury @ 0º C.
Current: xxx.xx
0xx.xx INHG
Cursor flashes to the right of
“0”.
Current: xxx.xx
029.50 INHG
Zeroing is complete when unit
returns to Measure Mode.
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Program Mode
The program mode is used to configure the manometer for
Measure Mode operation. After the PRGM key is pressed in
Measure Mode, the top line of the display reads “PROGRAM
MODE”. The bottom line reads “UNITS SELECT”. Press the ▲
or ▼ arrow keys to scroll through the Program Mode to the desired
register. The configurable registers found in the Program Mode
are Units Select, Damp Rate Select, User Info Select, Contra st
Select, Sea Level Select, Data Logging, Leak Test and Exit.
Press the PRGM key to select any of these configurable registers.
The manometer can be put into P rogram Mo de at any time during
Measure Mode operation by pressing the PRGM key. If Lockout
is set, the correct code must be entered when prompted (see the
User Info / Lockout section of this manual for more information on
Lockout).
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Keystroke
Display
Top line reads “PROGRAM
“UNITS SELECT”.
Top line reads “UNITS
current engineering units.
Engineering units on bottom line
Top line reads “PROGRAM
Bottom line reads “EXIT”.
Display returns to Measure Mode
in new engineering unit.
Units Select
The standard engineering units available on the HHP360 Precision
Absolute Manometer are:
inches of Mercury at 0° C (in Hg @ 0° C)
millimeters of Mercury at 0° C (mm Hg @ 0° C)
PSI
milliBars (mBar)
Bars
kPa
Torr
Feet (Altitude displays)
Meters (Altitude displays)
To change the engineering units the manometer should be “ON”
and in Measure Mode. Then follow these steps:
1. Press the PRGM key.
2. Press the PRGM key.
3. Press the or
arrow key until
desired engineering
unit is displayed.
4. Press the PRGM key
to select the
engineering unit.
5. Press the arrow
key.
6. Press the PRGM key.
MODE” and bottom line reads
SELECT” and bottom line shows
of display change.
MODE” and bottom line reads
“UNITS SELECT”.
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Keystroke
Display
Displaying Altitude (US Standard Atmosphere 1962)
The model HHP360 is capable of displaying altitude in feet or
meters based on U.S. Standard Atmosphere 1962 tables. To set the
unit to read out referenced to this altitude standard use the
following steps:
1. Press the PRGM key.
2. Press the PRGM key.
3. Press the or
arrow key until
“USER UNIT
SELECT” is
displayed.
4. Press the PRGM key.
5. Press the PRGM key.
6. Press the ◄ key.
Top line reads “PROGRAM
MODE” and bottom line reads
“UNITS SELECT”.
Top line reads “UNITS
SELECT” and bottom line shows
current engineering units.
Top line reads “UNITS
SELECT”
Bottom line reads “FEET or
METERS”.
Top line reads “ALTITUDE
SELECT” and bottom line reads
“STANDARD”.
Top line reads “PROGRAM
MODE” and bottom line reads
“UNITS SELECT”.
Manometer returns to Measure
Mode. Displays altitude
referenced to US Standard
Atmosphere 1962.
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Keystroke
Display
Top line reads “ALTITUDE
“STANDARD”.
685 feet above sea level.
Display User Defined Altitude
User Defined Altitude is useful in determining elevation change
from a map elevation reference or from a survey trig marker
elevation. To set up the HHP360 to display altitude based on user
entered information, use the following steps:
1. Press the PRGM key.
2. Press the PRGM key.
3. Press the ▲or ▼arrow
key until “FEET” or
“METERS” is
displayed.
4. Press the PRGM key.
5. Press the ▲ arrow key
once.
6. Press the PRGM key.
7. If the value shown in
step 6 is the correct
altitude, press the
PRGM key to accept
and the ◄ key to return
to Measure Mode.
- OR -
If the value shown in
step 6 is not the correct
altitude, press the ▼ key
8. Press the PRGM key.
Example: set altitude to
Top line reads “PROGRAM
MODE” and bottom line reads
“UNITS SELECT”.
Top line reads “UNITS
SELECT” and bottom line
shows current engineering
unit.
Top line reads “UNITS
SELECT”
Bottom line reads “FEET or
METERS”.
SELECT”. Bottom line reads
Top line reads “ALTITUDE
SELECT”. Bottom line reads
“REF. TO USER”.
Top line reads “VALUE=:
00000000”. Bottom line reads
“CHANGE?: NO”.
Top line reads “PROGRAM
MODE” and bottom line reads
“UNITS SELECT”.
Top line reads “VALUE=:
00000000”. Bottom line reads
“CHANGE?: YES”.
Top line reads “USER MODEFEET”. Bottom line reads
“00000000”.
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9. Press the ▲ or ▼ keys
to set the first digit to
“6”.
Using the ▲ key the
provides the character
sequence 0 - 9, ( - )
negative, and (.) decimal
point. The
( - ) sign is used if your
location is below sea
level.
10. When the digit is correct
press the PRGM key. If
an error is made use the
back space ◄ key to
move the cursor back to
the incorrect digit. Press
the ▲ or ▼ arrow keys
to display the correct
value.
11. Continue the process
until the display reads as
shown at right.
12. Press the PRGM key to
enter the final value.
13. Press the ◄ key to
return to Measure Mode.
Top line reads “USER MODEFEET”. Bottom line reads
“60000000”.
Cursor flashes to the right of
the “6”. Example: “60000000”.
Top line reads “USER
MODE-FEET”. Bottom line
reads “685.0000”.
Top line reads “PROGRAM
MODE”. Bottom line reads
“UNITS SELECT”.
Top line reads “altitude
referenced to 685”. Bottom line
reads “U 685 FEET”.
To set the unit to read in meters, select METERS from the UNITS
SELECT menu. Then follow the same steps as outlined above.
Because the local barometer varies with weather conditions, the
USER DEFINED ALTITUDE must be reentered each time the
HHP360 is to be used in this mode. To adjust the unit to the
current barometric pressure without changing the base altitude,
select “NO” in step 6 in the table above by pressing the PRGM
key. The HHP360 will display the current altitude referenced to
prevailing local barometric pressure. To maximize accuracy the
local altitude should be reset whenever better altitude information
is available.
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Keystroke
Display
Pressure Corrected to Sea Level
Pressure reduction to Sea Level is required so that barometric
readings can be compared at different elevations. The correction to
sea level is done using a “hypsometric equation”. This equation
simulates a “fictitious column of air” which extends downward
from the instruments location to sea level. This fictitious column is
assumed to be similar to the actual air column over nearby lower
elevations. Some properties are related to observed conditions
while others must be assumed. Barometric pressures given by the
National Weather Service and used at airports are always corrected
to sea level.
To set the unit to display pressure corrected to sea level:
1. Determine the elevation
of the instrument above
sea level, in meters. 700
meters will be used as an
example.
2. From Measure Mode
press the PRGM key.
3. Press the ▲ or ▼ key
until “SEA LEVEL
SELECT” is displayed.
4. Press the PRGM key.
5. Press the ▲ or ▼ key to
indicate the correction to
sea level status.
Top line reads “PROGRAM
MODE”. Bottom line reads
“UNITS SELECT”.
Top line reads “PROGRAM
MODE”. Bottom line reads
“SEA LEVEL SELECT”.
Top line reads “SEA LEVEL
SELECT”. Bottom line reads
either “ENABLE” or
“DISABLED”.
Bottom line toggles between
“ENABLE” and
“DISABLED”.
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6. To turn on the correction,
set ENABLED on the 2
line & press the PRGM
key.
-OR-
To turn off the correction,
set DISABLED on the
2nd line and skip ahead to
step 12.
7. To change the value press
the ▲ key to toggle the
display to “YES”.
8. Press the PRGM key.
9. Press the ▲ or ▼ arrow
keys to set the correct
value in the first digit.
10. When the value is correct
press the PRGM key.
11. Repeat steps 9 and 10
above until the correct
elevation is entered.
12. Press the PRGM key to
continue moving the
cursor to the right. When
the last digit is entered the
unit will leave the sea
level select mode and
return to the Program
Mode.
13. Press the ◄ key. The
display will return to the
Measure Mode. When
the Correction to Sea
Level is ENABLED, the
display will have the
letter “S” at the
beginning of the 2nd
line.
Top line reads “VALUE=:
nd
00000000”. Bottom line reads
“CHANGE?: NO”.
Top line reads “VALUE=:
00000000”. Bottom line reads
“CHANGE?: YES”.
Top line reads “SEA LEVEL
METERS”. Bottom line reads
“00000000”.
Top line reads “SEA LEVEL
METERS”. Bottom line reads
“70000000”.
Cursor moves over to the next
digit.
Top line reads “SEA LEVEL
METERS”. Bottom line reads
“700.0000”.
Top line reads “PROGRAM
MODE”. Bottom line reads
“UNITS SELECT”.
Display reads;
“S 803.1 TORR”
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Keystroke
Display
Damp Rate Select
Adjustable exponential type damping is available to steady the
display when measuring pulsating pressures. The HHP360 has a
range of damping rates; 0.1, 0.2, 0.5, 1, 2, 5, 10, or 25 seconds.
Damping is done by averaging new data from the pressure sensor
against previously collected data. The microprocessor collects data
from the sensor every 0.1 seconds. The display updates every 0.5
seconds, showing the current 0.1 second pressure reading. When
set at 25 seconds, the display updates every 0.5 seconds with the
average of the previous 25 seconds readings. Therefore, it takes up
to 25 seconds from the time pressure is applied until the
manometer displays the full scale applied pressure. Min/Max
display updates every 0.1 seconds.
To set the damp rate:
1. Enter Program Mode
by pressing the PRGM
key.
2. Press the ▲ key.
3. Press the PRGM key.
4. Press the ▲ or ▼
keys until the desire
damp rate is displayed
on the bottom line.
5. Press the PRGM key. Top line reads “PROGRAM
6. Press the ▼ key. Bottom line reads “EXIT”.
7. Press the PRGM key. Returns to Measure Mode.
Top line reads “PROGRAM
MODE”. Bottom line reads
“UNITS SELECT”.
Bottom line reads “DAMP
RATE SELECT”.
Top line reads “DAMP RATE
SELECT”. Bottom line shows
current value.
Bottom line shows damp rate
settings in seconds.
MODE”. Bottom line reads
“UNITS SELECT”.
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Keystroke
Display
1. From the Measure
key.
Top line reads “PROGRAM
“UNITS SELECT”.
2. Press the arrow key
twice
Bottom line changes to “USER
INFO SELECT”.
3. Press the PRGM key.
Bottom line shows serial
number.
4. Press the arrow key.
Software version number
shown.
5. Press the arrow key.
Manufacture date shown.
6. Press the arrow key.
in this manual.
Top line reads “AUTO SHUT
7. Press the arrow key.
in this manual.
Top line reads “LOCKOUT
8. Press the arrow key.
manual.
Top line reads “HEADER
bottom left.
9. Press the arrow key
screen.
Top line reads “PROGRAM
User Info Select
The User Info Select registers are designed to provide the user with
information on the hardware and software in the manometer. This
register provides read only information on the sensor’s serial
number, software version and date of manufacture. It also allows
the user to edit the Auto Shut-Off, Lockout and Start-Up Header
Name features.
To access the User Info Select registers, follow the steps below. To
configure a User Info Select register, follow the steps shown on the
following page.
Mode press the PRGM
Instructions to set
AUTO SHUT-OFF are
See instructions for
using LOCKOUT later
Instructions for editing
the Header later in this
to go back to “USER
INFO SELECT”
MODE” and bottom line reads
OFF” and bottom line reads
“ENTER TO SELECT”.
CODE” and bottom line reads
“ENTER TO SELECT”.
NAME” and bottom line reads
“text”. The cursor flashes at
MODE” and bottom line reads
“USER INFO SELECT”.
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Keystroke
Display
1. Follow steps 1-6 in
table.
Top line reads “AUTO SHUT-
“ENTER TO SELECT”.
2. Press the PRGM key,
is shown.
Top line reads “AUTO SHUT-
3. Press the PRGM key.
Desired Auto Shut-Off time is
reads “ENTER TO SELECT”.
4. Press the arrow
key three (3) times.
Returns to Measure Mode.
Auto Shut-Off
Enabling the Auto Shut-Off feature allows the manometer to turn
itself off after a user selected period of keypad inactivity.
Selectable options include DISABLED, 10 Minutes (which is the
factory shipped default), 20 Minutes, 30 Minutes, 45 Minutes and
60 Minutes. Disabling this feature limits the manometer to being
turned off by using the ON/OFF key only.
To configure auto shut-off follow these steps:
the User Info Select
then the or
arrow keys until the
desired shut-off time
Note: The “Auto Shut-Off” timer is suspended during Data
Logging and Leak Test sessions to prevent accidental loss of
information. Auto Shut-Off is re-instated after completion of DataLogging or Leak Test sessions.
OFF” and bottom line reads
OFF” and bottom line toggles to
“DISABLED”, “10”, “20”, “30”,
“45” and “60” minutes .
selected, top line reads “AUTO
SHUT-OFF” and bottom line
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Keystroke
Display
1. From the Measure Mode
when prompted.
Top line reads “PROGRAM
2. Press the arrow key
twice.
Bottom line reads “USER
INFO SELECT”.
3. Press the arrow key
four times.
Top line reads “LOCKOUT
“ENTER TO SELECT”.
4. Press the arrow key,
Bottom line shows the old
key is pressed.
5. Press the arrow key
set. Lockout is activated.
Top line reads “LOCKOUT
“ENTER TO SELECT”.
6. Press the arrow key
twice.
Returns to Measure Mode.
Lockout Select
Enabling the Lockout feature prevents unauthorized users from
making changes to the configuration of the manometer. To enter
the Program Mode, the user must first enter the “password” (twodigit Lockout Code) within approximately 40 seconds when
prompted. Failure to enter the correct two digit code within
approximately 40 seconds will return the unit to Measure Mode.
Any two-digit numeric code can be programmed. The factory
Lockout Code of 00 (which is the default as shipped from the
factory) disables the Lockout.
To set the Lockout Code follow these steps:
press the PRGM key. If
the Lockout is set, enter
the correct “password”
then the arrow key
then press the or
arrow keys to change the
first digit. Press the
arrow key to proceed.
when the desired code is
MODE” and bottom line
reads “UNITS SELECT”.
CODE” and bottom line reads
Lockout Code. The cursor
flashes at the first position
while the value is changed,
the cursor moves to the right
position once the right arrow
CODE” and bottom line reads
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Keystroke
Display
1. From the Measure Mode
Top line reads “PROGRAM
reads “UNITS SELECT”.
2. Press the arrow key
twice.
Bottom line changes to
“USER INFO SELECT”.
3. Press the PRGM key.
Bottom line shows serial
number.
4. Press the arrow key
Top line reads “HEADER
flashes at bottom left.
5. If header is correct press
7.
Top line reads “PROGRAM
SELECT”.
6. Press the arrow key.
Returns to Measure Mode.
7. Press the or arrow
alpha-numeric value.
Displays a number between 0
or a blank space.
8. Press the arrow key to
accept entry.
Cursor advances one space to
right.
9. Repeat steps 8 and 9 until
shown.
10. If an error is made press
changing values.
11. When the Header is
key until header accepted.
Top line reads “PROGRAM
reads “UNITS SELECT”.
12. Press the arrow key.
Returns to Measure Mode.
Header Name
Follow the steps below to edit the Header Name.
press the PRGM key.
five times.
backspace key. If editing
is desired proceed to step
keys to set the correct
the desired Header is
the back arrow key until
the cursor is over the
incorrect value. Follow
step 8 to correct. Press the
arrow key to advance
the cursor without
MODE” and bottom line
NAME” and bottom line
reads “text”. The cursor
MODE” and bottom line
reads “USER INFO
and 9, a letter from A to Z, /
complete press the PRGM
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MODE” and bottom line
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Keystroke
Display
Contrast Select
The Contrast Select register allows the user to adjust the character
contrast of the LCD display to provide the best visibility for the
ambient light conditions.
To adjust the contrast, follow these steps:
1. From the Measure
Mode press the PRGM
key.
2. Press the arrow key
three times.
3. Press the PRGM key.
4. Press the or arrow
keys to increase or
decrease the contrast
value. A low number
gives maximum contrast
and a high number gives
minimum contrast.
5. Press the PRGM key.
6. Press the arrow key. Returns to Measure Mode.
If an error is made during the contrast adjustment, pressing the
key returns the display to the previous contrast setting.
Top line reads “PROGRAM
MODE” and bottom line reads
“UNITS SELECT”.
Bottom line reads
“CONTRAST SELECT”.
Top line reads “CONTRAST
SELECT” and bottom line
shows a numerical value.
LCD lightens or darkens
depending on the value set.
Top line reads “PROGRAM
MODE” and bottom line reads
“UNITS SELECT”.
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Keystroke
Display
1. From the Measure Mode
Top line reads “PROGRAM
reads “UNITS SELECT”.
2. Press the arrow key
five (5) times.
Bottom line reads “DATA
LOGGING”.
3. Press the PRGM key.
Top line reads “DATA
reads “RECORD”.
4. Press the PRGM key.
Top line reads “RECORD
“MANUAL”.
5. Press the PRGM key at
Top line reads
time PRGM key is pressed.
6. To stop recording values
key.
Top line reads “DATA
7. To access recorded
Top line reads “DATA
reads “VIEW”.
8. To view recorded values,
Top line reads “DATA LOG:
the ▲ key to view all values.
9. Press the key 3 times.
Returns to Measure Mode.
Data Loggin g
Data Logging can be used to record pressure measurements. Two
record modes are supported: automatic and manual. In automatic
mode, a pressure value is captured every 5 seconds for 20 minutes,
resulting in 240 stored values. In manual mode, a pressure value is
captured each time the PRGM key is pressed up to 240 values. The
data collected during a logging session can be viewed upon
completion.
press the PRGM key.
MODE” and bottom line
LOGGING” and bottom line
MODE” and bottom line
reads “AUTO” or
AUTO to start automatic
logging or at MANUAL
to start manual logging
mode.
“RECORDING X” and
bottom line reads “XX.XX
UNITS”. AUTO records
value every 5 seconds.
Manual records value each
at any time, press the
LOGGING” and bottom line
reads “RECORD”.
values, press the key.
press the PRGM key.
LOGGING” and bottom line
1” and bottom line displays
the value. Continue pressing
The “Auto Shut-Off” timer is disabled for Data Logging sessions.
Be sure to end the session to re-enable the Auto Shut-Off timer.
25 of 36
Page 26
Keystroke
Display
1. From the Measure
key.
Top line reads “PROGRAM
“UNITS SELECT”.
2. Press the arrow key
twice.
Bottom line reads “LEAK
TEST”
3. Press the PRGM key.
Top line reads “LEAK TEST”
“CONFIGURE”.
4. Press the PRGM key.
Top line reads “Leak Test
Period” & bottom “X.X MIN”.
5. Use the , &
keys to input test period
Bottom line reads desired
period; Ex. “ 20.0 MIN”.
6. Press the PRGM key.
Top line reads “LEAK TEST”
“CONFIGURE”.
7. Press the arrow key
Top line reads “LEAK TEST”
TO START”.
8. Press the PRGM key.
Top line displays MIN/MAX
the current pressure reading.
9. Press the PRGM key to
exit the Leak Test.
Returns to Measure Mode.
Leak Test
The Leak Test feature allows the user to determine the leak rate in
the pneumatic system being monitored. Once configured, Leak
Test monitors the measured pressure over time and displays the
leak rate in the pressure units per minute at the conclusion of the
test. The maximum configurable leak test period is 1440 min (1
day). Pressing any key during the leak test will abort the test.
To enable Leak Test follow these steps:
Mode press the PRGM
once.
The “Auto Shut-Off” timer is disabled for Leak Test sessions. Be
sure to end the session to re-enable the Auto Shut-Off timer.
MODE” and bottom line reads
and bottom line reads
and bottom line reads
and bottom line reads “PRGM
pressure values at left/right.
Bottom line reads the current
pressure value and units.
At end of test period, top line
displays the leak rate in units
per minute. Bottom line shows
26 of 36
Page 27
Re-Calibration
The HHP360 can be re-calibrated in the field for zero, span, and
linearity. The proper primary standards must be available prior to
calibrating the unit. These standards should meet the accuracy
requirements for your company or industry. The factory follows
guidelines established by ANSI / NCSL Z540-1-1994 which
requires that the primary standard be 4 times more accurate than
the unit under test.
The re-calibration is not intended to replace the Factory Lab
Calibration Procedure. It is intended to correct the curve fit if the
actual sensor characteristics change slightly over time.
For sensors up to 200 PSI, a ±0.0015% of reading deadweight
tester is recommended.
1-point (within upper 50% of Full Scale), 5-point (nominal values
of 0%, 25%, 50%, 75% & 100% of Full Scale), and restore factory
default re-calibration options are offered. For the 5-Point recalibration, points 2, 3 and 4 can be adjusted within ±1% of
reading around the nominal values. Point #5 can be adjusted within
-1% of reading around nominal. Point #1 is fixed.
For example: for a 2000 inH2O sensor, Point # 2 (25%) can be
edited form 495 to 505 inH2O. Point #5 (100%) can be edited
from 1980 to 2000 inH2O.
The unit can only be re-calibrated if the calibration points are
within 5 times the accuracy of the original factory calibration (e.g.
@ 0.05% accuracy, the point limit is ±0.25% of Full Scale). If the
re-calibration procedure generates a new value outside this limit
the procedure will fail. In this case the unit would need to be
returned to the factory for service.
Once a re-calibration has been performed (either 1-point or 5point) the unit will continue to allow future re-calibrations only
with that type of re-calibration. In order to enable the other recalibration type, the user must first restore the re-calibration data to
the factory defaults.
27 of 36
Page 28
Keystroke
Display
1. With unit OFF, press and
MIN/MAX.
Top line reads “RE-CAL”.
2. Press the arrow key
line.
Top line reads “RE-CAL”.
3. Press the PRGM key.
Top line reads “RE-CAL
Bottom line reads “1-POINT”.
4. Press the PRGM key.
Top line reads “CAL POINT”
cal point value.
5. Press the or arrow
100% of FS.
Bottom line displays the cal
6. Press the arrow key
digit to proceed.
Top line reads “APPLY:”
POINT” value.
7. Apply the input pressure
key.
Top line reads “RE-CAL”.
8. Press the arrow key.
Returns to Measure Mode
Re-Calibration – 1 Point EDIT and START
To perform a 1-point re-calibration, apply a pressure between 50%
and 100% of Full Scale and then follow these steps:
hold the MIN/MAX key,
turn the unit on by
pressing the ON/OFF
key, then release
until “START” is
displayed on the bottom
keys to edit the selected
digit. Use the or
arrow keys to change the
cursor position. Value
entered must be 50-
while on the right most
indicated using an
appropriate reference
standard; press PRGM
Bottom line reads “EDIT”.
Bottom line reads “START”.
START”.
and bottom line displays the
point value. The cursor flashes
at the first position while the
value is changed, then moves
to the right position when the
right arrow key is pressed.
Bottom line displays the “CAL
Bottom line reads “START”,
Manometer has been
recalibrated.
28 of 36
Page 29
Keystroke
Display
1. With unit OFF, press and
ON/OFF key, then release
Top line reads “RE-CAL”.
2. Press the PRGM key.
Top line reads “CAL POINT
cal point value.
3. Press the or arrow
to step 4.
Bottom line displays the cal
key is pressed.
4. Press the arrow key
digit to proceed.
Top line reads “CAL POINT
cal point value.
5. Repeat steps 3 and 4 for
5.
Top line reads “CAL POINT
displays the cal point value.
6. After editing CAL
proceed.
Top line reads “RE-CAL”.
7. To perform the 5-point re-
Top line reads “RE-CAL”.
Re-Calibration – 5 Point EDIT
To edit the calibration points for a 5 Point re-calibration follow the
steps below.
NOTE: If the factory default values are acceptable, skip this
section and proceed to the re-calibration 5-Point START procedure.
hold the MIN/MAX key,
turn the unit on using the
keys to edit the selected
digit. Use the or
arrow keys to change the
cursor position.
Note: For 0% go directly
while on the right most
CAL POINTS 2, 3, 4 and
POINT 5 press the
arrow key while on the
right most digit to
cal, press the arrow
key until START is
displayed on the bottom
line.
OR
To exit without
performing the 5-point recal press the arrow key
Bottom line reads “EDIT”.
1”. Bottom line displays the
point value. The cursor
flashes at the first position
while the value is changed,
then moves to the right
position when the right arrow
2”. Bottom line displays the
2/3/4/5”. Bottom line
Bottom line reads “EDIT”.
Bottom line, “START”.
Continue with 5-Point Recalibration procedure at step 3
on next page.
OR
Returns to Measure Mode.
29 of 36
Page 30
Keystroke
Display
1. Press and hold the
the ON/OFF key.
Top line reads “RE-CAL”.
2. Press the arrow key
line.
Top line reads “RE-CAL”.
3. Press the PRGM key.
Top line reads “RE-CAL
POINT”.
4. Press the arrow key
line.
Top line reads “RE-CAL
POINT”.
5. Press the PRGM key.
Top line reads “POINT 1 –
applied pressure.
6.
keys, then release.
Unit takes new zero. Top line
7. Press the arrow key
Top line reads “ POINT 2 -
point value to apply.
8. Apply the indicated
arrow key.
Top line reads “ POINT 3 -
9. Repeat step 8 for CAL
Top line reads “POINT 4/5 -
point value.
Re-Calibration – 5 Point START
To begin the 5-point re-calibration procedure, turn the unit OFF
and follow the steps below.
MIN/MAX key and turn
the unit on by pressing
until “START” is
displayed on the bottom
until “5-POINT” is
displayed on the bottom
Vent P1 and P2 ports to
atmosphere and
simultaneously press the
MIN/MAX and HOLD
while on the right most
digit to proceed.
calibration point pressure
using external pressure
standards. After pressure
is stable, press the
Bottom line reads “EDIT”.
Bottom line reads “START”.
Bottom line reads “1-
START”.
Bottom line reads “5-
ZERO:”
Bottom line displays live
reads “ POINT 1 - ZERO:”
Bottom line displays live
applied pressure. POINT 1
has been taken.
APPLY:”.
Bottom line displays the cal
APPLY:”.
Bottom line displays the cal
point value to apply.
POINTS 4 and 5.
APPLY”
Bottom line displays the cal
30 of 36
Page 31
Re-Calibration data.
Top line reads “SAVE?”.
to exit without saving.
Top line reads “RE-CAL”.
Returns to Measure Mode.
Keystroke
Display
1. With unit OFF, press and
release.
Top line reads “RE-CAL”.
2. Press the arrow key
Top line reads “RE-CAL”.
DEFAULTS”.
3. Press the PRGM key.
Top line reads “RESTORE
Bottom reads “YES” or “NO”.
4. Use the and arrow
defaults.
Top line reads “RESTORE
5. Press the PRGM key at
to exit without restoring.
Top line reads “RE-CAL”.
6. Press the arrow key.
Returns to Measure Mode.
to select NO or YES
when asked “Save?” the
YES to save the ReCalibration data or at NO
Re-Calibration – Restore Factory Defaults
To restore the re-calibration data to the factory defaults, follow
these steps:
hold the MIN/MAX key,
turn the unit on using the
ON/OFF key, then
twice.
keys to select YES or NO
when asked to restore
Bottom line reads “NO” or
“YES”.
Bottom line reads “START”.
Re-cal is complete.
Bottom line reads “EDIT”.
Bottom line reads “RESTORE
DEFAULTS”.
DEFAULTS”.
Bottom reads “YES” or “NO”.
YES to restore the
Factory Default
Calibration data or at NO
31 of 36
Bottom line reads “RESTORE
DEFAULTS”. Factory
defaults have been restored.
Page 32
Type and Range and Display Resolution:
HHP360-B: 0 - 38.674 psia (0 - 2000.0 mmHg)
Accuracy:
Warm up time = 5 minutes.
Temperature:
Operating = -5°C to +50°C (23°F to +122°F)
Media Compatibility:
compatible with 316L SS
Pressure Limits:
AI units: 77 PSIA (4000 mm Hg Abs)
Connection:
to plastic enclosure.
Battery Operation:
programmable at Disabled, 10, 20, 30, 60 or 90 minutes
Enclosure: (6.9" x 3.8" x 2.3") Polycarbonate, Permanently
Enclosure with Boot: (7.2" x 4.2" x 2.5")
Specifications
HHP360-A: 0 - 17.403 psia (0 - 900.00 mmHg)
HHP360-A: 0017: ±0.02 % F.S. (F.S. = 900 mm Hg)
HHP360-B: 0038: ±0.015 % F.S.* from 0-1000 mm Hg
Includes the combined effects of temperature, linearity,
repeatability, hysteresis and resolution.
Storage = -40°C to +60°C (-40°F to +140°F)
AI: Absolute pressure sensors for use with gases and liquids
1/8” female NPT, 316L SS. P1 is the pressure connection.
P2 is not accessible (factory plugged with metal disc)
±0.025% F.S.* from 1000-2000 mm Hg
*F.S. = 2000 mm Hg Absolute
User must use a wrench on the pressure manifold when
installing user’s 1/8” NPT fitting. Do not tighten the
fitting without using a wrench on the pressure
manifold. Failure to use a wrench on the manifold will
damage the plastic enclosure and void warranty No
torque should be applied to the manifold with respect
>100 hours continuous use, 1 year shelf life, auto power off
Static Dissipative, ESD Protection
32 of 36
Page 33
Certification / Safety / Warnings
The HHP360 is for general purpose use only.
Note the following WARNINGS and requirements:
• Substitution of components may impair operation
• Do not use or service in the presence of explosive atmospheres.
• Do not replace batteries in the presence of explosive
atmospheres.
• User must use a wrench on the pressure manifold when
installing user’s 1/8” NPT fitting. Do not tighten the fitting
without using a wrench on the pressure manifold. Failure to
use a wrench on the manifold will damage the plastic
enclosure and void warranty No torque should be applied to
the plastic enclosure while installing 1/8” NPT fittings.
Changing the Batteries
Make sure you follow the Specifications and Certification / Safety /
Warnings sections of this manual when changing batteries.
The manometer is powered by four, 1.5 volt AA size batteries.
When the output of the batteries under load drops, the display will
alternate between “LOW POWER DETECT” and “REPLACE
BATTERY”. Low power may affect performance. The unit should
not be used to measure pressure in this condition. All four batteries
should be replaced.
To replace the battery locate the battery compartment at the bottom
rear of the manometer, as shown here.
Remove the two screws on either side of the battery cover by
turning them counterclockwise until fully disengaged from the
manometer base. Lift the cover from the back of the unit.
33 of 36
Page 34
Remove the batteries by pulling the positive side first straight out
of the battery compartment. Note the positive (+) and negative (-)
battery polarity markings at the bottom of the compartment, as
shown here.
To install the four batteries: 1) Make sure polarity of battery
matches the markings in the compartment. 2) 1st place the (+) end
of the battery into the bottom of the battery slot. 3) Then push in
(-) end of the battery until it is seated in the bottom of the battery
slot. The battery compartment has stand offs molded into the side
of the compartment. When a battery is installed with the polarity
reversed, the stand offs prevent the negative battery terminal from
contacting the positive terminal in the battery compartment. The
unit will not power up when a battery is installed this way. Should
this happen, simply reverse the battery to align the polarity.
With the batteries secured in the battery compartment, replace the
compartment cover. The cover has only one correct alignment.
The “WARNING
statement on the battery cover must be visible and aligned in the
middle of the manometer case. To secure the cover, torque the
screws clockwise to 1.6-1.8 in-lbs. Do not over tighten.
DO NOT OPEN IN EXPLOSIVE ATMOSPHERE”
34 of 36
Page 35
OMEGA ENGINEERING, I NC.
and
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WARRANTY adds an
year
product warranty
OMEGA’s
custome rs
If the unit
malfunctions,
Customer
immedi ately
unit is found to be
WARRANTY does not apply to defects
including
outside of design
WARRANTY is VOID if the unit shows evidence of having
shows evidence of having been damaged as a result of excessive
current,
misuse or other
which wear is not
and
OMEGA
However, OMEGA neither assumes responsibility
nor
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OMEGA warrants
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any Product(s) be used in or with any nuclear
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Direct all
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PURCHASER MUST OBTAIN AN AUTHOR IZED RETURN (AR) NUMBER FROM
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PROCESSING DELAYS). The assigned AR
outside of
The
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FOR
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which
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3. Repair
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OMEGA’s policy is to make running chang es, not model changes, whenever an improvement is possi ble. This
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OMEGA is a trademark of OMEGA ENGINEERING, INC.
© Copyright 2017 OMEGA ENGINEERING, INC. All rights reserved. Thi s document may not be copied,
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liability
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Department.
CUSTOMER SERVICE DEP ARTMENT (IN ORDER T O AVOID
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return package and on any
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WARRANTY
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Page 36
M4928/0518
Manual 9R68M-C EO 7868
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Process Measurement and Control?
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