Sper scientific 840065 User manual

PRESSURE METER
840065
Instruction Manual
SPER
SCIENTIFIC LTD.

CONTENTS
Title Page
I. Introduction ................................................. 3
II. Panel Description........................................ 3
III. Operating Instructions
A. Sensor Types ........................................ 4
B. Changing the Sensor............................. 4
C. Measuring Procedures .......................... 5-6
D. Measuring Considerations..................... 6
E. Auto Power Disable ............................... 6
F. Calibration.............................................. 6-8
G. RS232 PC Serial Interface .................... 8-9
H. Battery Replacement............................. 9
IV. Optional Accessories .................................. 9
V. Specifications.............................................. 10-11
VI. Warranty .....................................................Back Cover

- 3 -
I. INTRODUCTION
This unit covers a wide pressure range, 0 ~ 725 PSI, not
usually found in a single meter and is compatible with both
liquids and gases. Useful in measuring pneumatic pressure,
automobile engine vacuum pressure, super heat
measurements, hydraulic servo controls, refrigeration, air
conditioning, and food processing. Features eight units of
measure (Bar, Psi, Kg/cm mm/1meter/H20, inch/H20,
Atmosphere), min-max, hold, auto power off and an RS232
computer interface.
II. PANEL DESCRIPTION
Figure A
10
2
4
11
12
13
9
1
7
3
6
5
8
1. Display
2. POWER Button
3. HOLD Button
4. MAX/MIN Button
5. UNIT Button
6. ZERO Button
7. SENSOR TYPE Button
8. Battery Compartment/Cover
9. Sensor Input Socket
10. RS232 Output Terminal
11. Pressure Sensor Port Connector
12. Pressure Sensor Main Housing
13. Pressure Sensor Plug

- 4 -
III. OPERATING INSTRUCTIONS
A. SENSOR TYPES
The meter works with optional pressure sensors. When
changing the sensor, recalibration is not required.
The optional pressure sensor are:
• 2 Bar pressure sensor
• 5 Bar pressure sensor
• 10 Bar pressure sensor
• 20 Bar pressure sensor
• 50 Bar pressure sensor
• 100 Bar pressure sensor
• 200 Bar pressure sensor
B. CHANGING THE SENSOR
•Turn the meter off.
•Push and hold the following 3 buttons at the same time:
•HOLD Button (Fig. A-3 )
•MAX/MIN Button (Fig. A-4)
•SENSOR TYPE Button (Fig. A-7)
•Continue to hold the 3 buttons, while pushing the
POWER Button (Fig. A-2). Release the buttons and
the display will indicate the previous sensor type.
•Push the SENSOR TYPE Button (Fig. A-7) to select
the sensor (2, 5, 10, 20, 50, 100, or 200 Bar). When
the display indicates the desired sensor, push the Zero
button (Fig. A-6). The new sensor type will be stored in
memory, even after the unit has been turned off.
•Turn off the meter. This completes the sensor
selection.
Bar
10

- 5 -
C. MEASURING PROCEDURES
•Connect the Pressure Sensor Plug (Fig. A-13) to the
meter's Sensor Input Socket (Fig. 1-9).
•Press the POWER Button (Fig. 1-2).
•Press the SENSOR TYPE Button (Fig A-7) to check that
the meter's sensor type is correct.
•Press the UNIT Button (Fig. A-5) to select the desired unit
of measure: Bar, Psi, Kg/cm2, mm/Hg, inch/Hg, meter/
H20, inch/H20, or Atmosphere.
•Press the ZERO Button (Fig. A-6) and the display reading
will show zero.
•Attach the Pressure Sensor Port Connector (Fig. A-11) to
the object to be measured.
•Apply pressure and the meter will indicate the pressure
value.
DATA HOLD
•Press the HOLD Button (Fig. A-3) during measurement to
freeze the displayed value. "HOLD" is shown on the LCD.
•Press the HOLD Button a second time to resume
measurement.
DATA RECORD ( Maximum, Minimum reading)
The Data Record function displays the maximum and
minimum readings. To start the Data Record function, press
the MAX/MIN Button (Fig. A-4) once. The LCD display will
indicate "REC." Press the MAX/MIN Button again and the
"Max" symbol (along with the maximum value) will appear on
the LCD display. Press the MAX/MIN Button a third time and
the "Min" symbol (along with the minimum value) will appear
on the display. To exit the memory record function, press
and hold the MAX/MIN Button for approximately 2 seconds.
The display will revert back to the current reading.

- 6 -
MEASURING PROCEDURES OVERVIEW
1. Connect the Sensor Plug to the meter's Input Socket
2. Turn on the meter
3. Select the display unit.
4. Zero the meter by pressing the ZERO Button.
5. Connect the pressure sensor to the object being
measured.
6. Apply pressure and meter will display the pressure value.
D. MEASURING CONSIDERATIONS
• The sensor diaphragm can be damaged by solid or sharp
objects. Never insert objects into the inlet port.
• The pressure sensor operates with industrial gases and
liquids that are compatible with 316 stainless steel or
ceramic materials. To determine the compatibility of a
liquid or gas, refer to manufacture's specification.
E. AUTO POWER DISABLE
This unit has a built-in Auto Power Off function to prolong
battery life. The meter will shut off automatically if no buttons
are pressed within 10 minutes. To deactivate this feature,
select the memory record function during measurement, by
pressing the MAX/MIN Button (Fig. A-4).
F. CALIBRATION
Generally, it is not necessary to perform calibrations on the
pressure meter or the external pressure sensor. Each unit is
preadjusted and calibrated.
ZERO CALIBRATION
After a long period of operation or due to the environment,
the zero and gain (span) may drift. To ensure an accurate
reading, perform a Zero Calibration as follows:
•Connect the pressure sensor and shut on the meter.
•Press and hold both the MAX/MIN Button (Fig. A-4) and
the HOLD Button (Fig. A-3). The zero value will be
displayed in both large and small digits.

- 7 -
•Continue pressing the MAX/MIN and HOLD Buttons and
press the ZERO Button (Fig. A-6). The display will flash
once and return to zero.
•Release all three buttons and the new zero value will be
stored.
GAIN CALIBRATION (Span adjust)
•Turn on the meter and allow it to warm up for two
minutes.
•Push the ZERO Button (Fig. A-6).
•Connect the pressure regulator to a nitrogen bottle and
the reference gauge to the pressure regulator.
•Press and hold both the MAZ/MIN Button (Fig. A-4) and
the HOLD Button (Fig. A-3). Results will be displayed in
both the large and the small digits.
•
•Continue pressing the MAX/MIN and HOLD Buttons and
press the SENSOR TYPE Button (Fig. A-7) once, to add
one count to the small digit value.
Bar
0.03
0.03
Bar
0.00
0.00
Bar
8.98
8.98

- 8 -
•Press the UNIT Button (Fig. A-5) once to decrease the
small digit value by one count.
•When the desired value is reached (for example 9.00),
release the HOLD and MAX/MIN Buttons. The display
will flash. Push the SENSOR TYPE Button (Fig. A-7)
within 5 seconds. The new gain value will be stored in the
unit.
G. RS232 PC SERIAL INTERFACE
•The unit features an RS232 output via 3.5 mm Terminal
(Fig. A-10). The connector output is a 16 digit data
stream which can be utilized by user's specific application.
An RS232 lead with the following connection will be
required to link the instrument with the PC serial input.
•The 16 digit data stream will be displayed as follows:
Bar
8.98
9.00
Meter (3.5 mm jack plug) PC (9W "D" Connector)
Center Pin Pin 2
Ground/Shield Pin 5
D15D14D13D12D11D10D9D8D7D6D5D4D3D2D1D0

- 9 -
Each digit indicates the following status:
RS232 FORMAT: 9600, N, 8, 1
H. BATTERY REPLACEMENT
When the top left corner of LCD display indicates "LBT," it is
time to replace the battery. Accurate readings may be taken
for several hours after the low battery indicator appears.
Open the battery cover, install a fresh 9V battery and replace
the cover.
IV. OPTIONAL ACCESSORIES
840066 - 29 PSI Transducer
840067 - 72.5 PSI Transducer
840068 - 145 PSI Transducer
840069 - 290 PSI Transducer
840070 - 725 PSI Transducer
840051 - Datalogger with Data Lab Graphical Software
v. 1.03 or higher
840053 - Data Lab Graphical Software v. 1.03 or higher
840055 - RS232 Cable
840090 - Water Resistant Instrument Pouch
850080 - PC Compatible Software
DO End Word
D1 & D8 Display reading, DI " LSD, D8 MSD. For example: If the
display reading is 1234, then D8 to D I is: 00001234
D9 Decimal Point(DP), position from right to the left 0 " No DP,
1 " 1 DP, 2 2 DP, 3 " 3 DP
D10 Polarity , 0 = Positive, 1 = Negative
D11 & D12 Anunuciator for Display
Bar = 22 mm/Hg 78 inch/H2O=25
Psi = 23 inch/Hg=80 ATP = 26
K /cm2 = 77 meter/H2O=79
D13 I
D14 4
D15 Start Word

- 10 -
Circuit Microprocessor LSI circuit.
Display 61 mm x 34 mm super large LCD
display.
15 mm (0.6") digit size.
Sensor type Works with optional 2, 5, 10, 20, 50,
100, 200 bar sensor, new calibration is
not necessary when the sensor is
changed.
Measuring units Bar, Psi, Kg/cm2, mm/Hg, inch/Hg,
meter/H2O, inch/H2O Atmosphere.
Accuracy ± 0.5% + 1d, within 23°C ± 5°C
Zero adjust Push button on the front panel.
Span adjust Push button gain adjustment for
precise calibration.
Input signal from
sensor
DC 100 mV for full scale.
Data output RS 232 PC serial interface.
Sampling time Approx. 0.8 second.
Operating temperature 0 ~ 50°C (32 ~ 122°F)
Operating humidity Less than 80% R.H.
Power supply Alkaline or heavy duty type DC 9V
battery, 006P, MN1604 (PP3) or
equivalent.
Power current Approx. DC 7.0 mA.
Weight 0.76 lbs (345g).
Dimension 7.1 x 2.8 x 1.3"(180 x 72 x 32 mm).
Accessories included Instruction manual, hard carrying case,
and one sensor.
V. SPECIFICATIONS