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

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

- 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

Bar

0.00

Bar

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

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