Ponpe 8252 User manual

HAND HELD DIGITAL
RS232 MANOMETER
OPERATION MANUAL
Model: 8252
www.ponpe.com

Congratulations on your purchase of
the Manometer ! This instrument is
portable, battery operated pressure
measuring device.
The Manometer is ideal for HVAC/R
technicians measuring pressure
level ,Medical equipment ,Computer
peripherals , Pneumatic Controls.
1
INTRODUCTION
The meter will display all LCD
segments when it is first turned on
for approx. 3 seconds. Though you
might have seen DATALOGGER,
Y/M/D, REL, AVG ..these are not
available for the meter.
The LCD is divided into two distinct
sections : One large (Primary) top
screen and one smaller right-
bottom bottom screen (Relative
Clock). The 2 display areas keep
you constantly updated with the
pressure measurements.
The Meter measures:
* Gauge pressure-a measure of
pressure in psi that is referenced to
ambient pressure.
* Differential pressure- a measure
of the difference of two pressures .
Meter has 5 selectable units of
measure. : InH2O,psi,mbar, bar ,
mmH2O.

CONVERSION & RESOLUTION
2
Please check the tubing is not
leaking or damaged before using.
1mbar=1mbar=
Resolu tio n
inch of H2O
mbar
psi
bar
mm of H2O
0.01
0.001
0.1
0.001
1
0.401
0.0145
1
0.001
10.2

4
3
10
12
1
5
9
8
7
6
11
15
14
2
13
HOL D REL DIF
DATAL OGGER
REC AVG
MAX MIN BAT
3
CONTROLS AND INDICATORS
1.
2. "-" . Minus pressure display.
3. MAX MIN presssure recorded.
4. REC starts recording mode and
displays max./min. pressure
recorded.
5. AVG. Average records
6.
7.
8.
9. . Pressure unit indication.
10.
11. DIF. Differential pressure mode.
12. "+" Positive pressure connection.
13. "-" Negative pressure
connection.
14. HOLD. Freezes pressure reading.
Primary Data Screen displays
pressure value.
(N/A).
DC power in Jack.
RS232 output port.
H/M/S 88:88:88 displays time for
Hour / Minute / Second.
BAT. Battery low indicator.
inH2O psi mbar bar mmH2O

"-" Negative
pressure
"+" Positive
pressure
4
15. REL. Establish a relative zero
for the primary screen
information.(N/A)
This instrument will shut off
automatically in approx. 20 minutes for
every power on. For recording or
operating over longer periods of time,
you can disable the sleep mode by
pressing and simultaneously
before power on.
An "n" will appear in the middle of the
screen at which time you can release
the button. (See Fig. A) The
disable sleep mode will be invalid after
power off.
Fig. A
I
HOLD
AUTO POWER OFF (SLEEP
FUNCTION)
HOLD
MODE OPTIONS
Delete and replace with programmable
user selectable start-up mode.
The display will default to the mode
last used.

HOLDHOLD DIFDIF
RECREC
UNITUNIT
ll
++
==
==
==
DISABLE SLEEP MODE
ZERO SETTING
SELECT UNIT / SKIP CAL.
HOLD
HOLD
Hold 2 sec.
Turns instrument on (Default set-
ting) and off.
I
REC
Press momentarily and relative
clock starts in the lower right
screen.
REC is displayed in the middle
left of screen(Fig.B).Other button
functions are locked out except
Power , Unit and Backlight.
Press momentarily again and the
unit cycles through MAX (Fig. C)
and MIN (Fig.D) and back to
current pressure ; the record
mode is displayed on the LCD.
Press and hold for 3
seconds to turn off the record
function and return to normal
mode.
5
The following table
lists the modes of
operation that can
be invoked by
pressing the button
indicated.
REC
Fig. B
inH2O psi mbar bar mmH2O

HOLD
Press momentarily to freeze the
pressure reading . (Fig.E)
Fig. C
Fig. D
6
Press momentarily ,DIF appears
on top of the LCD and the display
indicates the relative zero (
Relative zero causes the value of
the display to show as "0.0")-only
the amount of pressure change
will be indicated. Press
momentarily again and the unit
returns to the normal mode of
pressure differential (see Fig.F).
DIFDIF
Fig. F
inH2O psi mbar bar mmH2O
inH2O psi mbar bar mmH2O
Fig. E
inH2O psi mbar bar mmH2O
DIF
inH2O psi mbar bar mmH2O

Press momentarily and the units
will cycle through " InH2O","psi"
,"mbar"," bar" ,"mmH2O." ,
"mbar" ,which are indicated on
the bottom of the display
(See Fig.G &H).
UNIT
Differential Pressure : A measure of
the difference between two pressures
, i.e. use differential pressure sensor
to measure gauge pressure by
leaving one process connection open
to atmosphere and connecting the
second sensor port to your system.
Fig. G
7
Press momentarily and the back-
light illuminates for approx. 30
seconds then turns off
automatically.
Or press momentarily to
decrease the figure when
calibration is being performed.
Fig. H
inH2O psi mbar bar mmH2O
inH2O psi mbar bar mmH2O

MAINTENANCE
The meter is calibrated in house
before shipping.
When properly maintained , the
meter will maintain its accuracy
specification, to ensure your meter
is performing at its peak, send it to
the factory or a qualified instrument
calibration facility for annual
calibration.
Recommend always set zero
before measurement .Refer to the
zero setting procedure in page 11.
Cleaning:
Use a damp cloth and mild soap to
clean the case of the Manometer, do
not use harsh detergents or abrasives
as these may mar the finish or damage
the unit's case with an adverse
chemical reaction.
8
CALIBRATION MODE
Calibration mode is only applicable
for a standard Manometer calibrator
or any qualified meter calibration
facility for annual calibration.
1. First , manually set the display to
zero ( no pressure applied to the
connector ), refer to the m anual
zero procedure(in page11).

Fig. I
psi
4. The meter has defaulted as 1.6 psi
calibration point , the adjustable
pressure range is from 1.5 to 1.7
. if calibration pressure source is
not 1.6 psi ,increase by pressing
key , or decrease by pressing
key to set calibration point as
required.
5. Save the calibration point by
pressing key , "SA" and small
"CA"appears on the display (See
Fig. J ) in 2 seconds , the meter
auto-skips to the negative pressure
(-) point for next calibration mode.
RECREC
RELREL
RECREC
9
2. Turn the meter off.
3. Press & simultaneously
,"CA" appears on the display, (See
Fig.I )the meter enters to the
calibration mode ,make sure the
units setting on "PSI" to start
positive (+) pressure calibration
psi
Fig. J

6. Follow the same procedure as step
4 for the negative pressure
calibration point , .
The LCD now displays" -1.600 "
and small"CA" (See Fig.K ) , do the
necessary calibration figure refer to
your pressure standard if needed.
7. Again save the calibration point by
pressing key, "SA" and "CA"
appears in 2 seconds and then
pressing "unit","End"and "CA"
appears in another 2 seconds, the
meter turns back to the normal mode
(See Fig. L ).
RECREC
psi
Fig. K
psi
Fig. L
10
If you can't save by pressing key,
i.e. no "SA" appeared , please check:
(a) The cabliration pressure source is
between 1.5 and 1.7, or check (b) if
you entered the right positive pressure
(+) or negative pressure (-).
UNITUNIT
If you want to skip positive (+)
calibration when in the Calibration
mode , press to skip to negative
(-) calibration point.
RECREC
UNITUNIT

11
Calibration point reference
psi
range
Calibration
point
Reommend
( )( )
HOLDHOLD
MANUAL ZERO SETTING
When you set the display to zero( no
pressure applied to the connector), press
button for 2 seconds , now the
meter displays "- 0 .000" from right to left
(See Fig.M) and then disappears , the
LCD display shows a normal mode .
Fig. M
inH2O psi mbar bar mmH2O
0~ 2 1.6 1.5~1.7

12
TROUBLESHOOTING
?Power on but no display. Check
the battery connections, Replace
with new battery or attach optional
AC adaptor.
BAT indication. Replace with a
new battery when LCD displays
BAT at the middle bottom.
?
No Display. Make sure battery is
not empty , if the display disappear,
check sleep mode is active . Refer
to the Disable sleep mode function
for a long time using the measure
ment. Or check the tubing is
connected to the meter tightly.
?
?Err.1. For the pressure value
exceeding the maximum range , "
Err.1" appears on the display ( See
Fig. O ).Do not exceed rated over
pressure range of manometer.
Sensor will be damaged.
Fig.O
?Err.2. For the measurement
pressure less than minimum
range ,"Err. 2" will appear (See
Fig.P ).

Fig. P
13
?Err.3.For a differential pressure
value larger than maximum display,
Err.3 appears on the display (See
Fig.Q ).
Err.4. When you set zero ,make
sure you have disconnected the
tubing. If you see an Err.4 appear
on the display, it means the
manometer is damaged (See Fig.R
).
?
Fig. Q
P.S. Err.4 will be also appear.
If the tubing is connected during zero
set.
Fig.R
?E1OL or E2UL. When you see the
errors while operating Rs232
software, it means pressure source
is less or over than the range of the
instrument.

Replace your 9-volt battery when:
The BAT icon appears on the right
of the screen.
The meter will not power on.
Use of the back-light causes the
BAT icon to appear.
14
REPLACING THE BATTERY
Remove battery from instruments that
you do not plan to use for a month or
more.
Do not leave battery in instrument.
1. Remove the tubing of the
instrument.
2. Lay the instrument face-down on a
clean, flat surface.
3. Remove battery cover.
Even if the battery was recently
replaced, check its voltage level if you
get no response from your instrument.
To replace the battery:
OPERATING CONDITIONS
Compensated temperature range:
o
0~50 C.
o o
Operating temperature 0 ~50 C
o
(32~122 F)
Storage temperature range:
o
-20~60 C

15
SPECIFICATION
Pressure
Range
Resolution
Accuracy
Dimension
Unit Weight
Response
time
Format
0~ 2 psi
See Page 2 data sheet
o
0.3% of full scale at 25 C
72 x 182 x 30 mm (meter)
Approx. 220 gram (with
battery)
0.5 seconds
Baud Rate : 2400 bit/sec
Data Bit : 8 , Stop Bit : 1
P XXXXX , P - XXXXX (unit)
Operating Humidity Max. 80% RH
Power : One 9.0 volt battery
Exceeding Maximum pressure will
cause permanent sensor damage.
The meter
Battery (9.0 volt)
Operation manual
Pouch
Connection hose 4mm(ID)x6mm(OD)
x 500mm length x 2 Purchase
MATERIAL SUPPLIED
This package contains:
OPTIONAL ACCESSORY:
RS232 software disk or CD with D-
sub connector
DC Adaptor

16
RS232 OUTPUT:
The meter can link with a personal
computer to capture on-line data ,
display pressure records with real-
time output, you can retrieve files ,
save the data for operating data
analysis, record statistics ,multi-files
display in the screen,....versatile
functions for your choice.
Connection procedures:
1.Plug the optional accessory RS232
cable onto the DC jack port ( at the
right side of the meter)
4. When installing the RS232 software
,please follow the operation manual
procedure in the software package.
2.Insert the D-sub 9P type connector
onto computer's Com.1 or 2 port or..
3.Start to set up RS232 software by
inserting the CD-ROM or Floppy
diskette.

17