Sper scientific 850081 User manual

Water Quality Meter

850081

Instruction Manual

SPER

SCIENTIFIC LTD.

TABLE OF CONTENTS

I. INTRODUCTION ..................................................................... 3

II. PANEL DESCRIPTION........................................................... 3

III. PROCEDURES OVERVIEW................................................... 4

IV. OPERATING INSTRUCTIONS ............................................... 5

A. TEMP. COMPENSATION - PH MEASUREMENT... ........ 5

1. Manual Temperature Compensation ........................... 5

2. Automatic Temperature Compensation....................... 5

B. PH CALIBRATION PROCEDURE ................................... 5

1. Electronic Calibration (without buffers)........................ 5-6

2. Chemical Calibration (with buffers).............................. 6-7

3. Meters that are Out-of-Calibration by more

than 1 pH of the Calibration Solution. .......................... 7

C. MEASUREMENT PROCEDURES ................................... 7

1. Temperature ................................................................ 7

2. PH ............................................................................... 8

3. mV .............................................................................. 8

4. Hold ............................................................................. 8

5. Maximum/Minimum ..................................................... 8-9

D. AUTOMATIC SHUT OFF ................................................. 9

E. OVERLOAD INDICATOR ................................................. 9

F. BATTERY REPLACEMENT ............................................. 9

G. RS 232 PC SERIAL INTERFACE .................................... 9-10

V. SPECIFICATIONS .................................................................. 10-11

VI. PROBES ................................................................................ 11

VII. WARRANTY............................................................................ 12

- 3 -

I. INTRODUCTION

Using interchangeable probes this versatile meter reads pH, mV, conductivity,

TDS, D.O. temperature and ORP. Order probes for only the parameter you

currently require and add additional probes in the future. Intelligent probes

electronically retain calibration information. No recalibration is required when

changing probes, and pH can be calibrated without buffer solutions when they

are not available.

The display simultaneously reads temperature in user-selectable ºC & ºF and

all measurements are automatically temperature compensated. The RS-232

port enables communication with a computer. Also features automatic shut

off, hold, maximum/minimum, fold out easel back and a tripod screw. Comes

with 9V battery and a hard-shell foam-lined carrying case with room for one or

two probes.

1. Display 7. C & Down (CAL) Button 12 Opt. Probe Input Socket

2. Power Button 8. D (TEMP.C) Button 13. RS-232 Out Terminal

3. REC. Button 9. Battery Compartment 14. Stand

4. Hold Button 10. pH BNC Input Socket 15. PH7 Cal.

5. A & UP (°C/°F) Button 11. Probe Lock 16. PH4/PH10 Cal.

6. B & LEFT (PH/mV) Button

II. PANEL DESCRIPTION

Fig. 1

- 4 -

Optional Measuring Procedure

Data Hold Memory Record

Max. Min. RS232 Output

PH Measuring Procedure

Power On

Set manual temperature

compensation values on the

front panel

Automatic temperature

compensation by optional

ACT probe

Measurement

Power Management

Auto Power Off

(not activated during

Memory Record Selection)

Manual Power Off

Power On

Single point calibration

pH7 (CAL.)

Set manual temp. values

or attach ATC probe Two points calibration

pH7 (CAL. & PH4

(pH10, SLOPE)

Calibration

III. Procedures Overview

- 5 -

IV. OPERATING INSTRUCTIONS

A. TEMPERATURE COMPENSATION - pH measurement.

Note: The meter is factory set for a solution temperature of 77°F/25°C.

1. Manual Temperature Compensation for pH Measurement

•Slide the LOCK SWITCH to the locked position and press the POWER

button. The LCD flashes momentarily.

•The temperature is shown in the lower display

(Fig.2). Press the °C/°F button to select the

desired unit of measure.

•Press the TEMP.C button to adjust the manual

temperature compensation by using the LEFT, UP

and DOWN buttons.

•Press the TEMP.C button 3 times to return to the measuring mode.

2. Automatic Temperature Compensation (ATC) for pH Measurement

•Connect the pH electrode to the BNC SOCKET. Plug the ATC probe into

the OPTIONAL PROBE INPUT SOCKET. Slide the LOCK SWITCH to the

locked position and press the POWER button. The LCD flashes momen-

tarily.

•Press the PH/MV button and select the pH mode. "PH" is displayed on the

LCD.

•Insert both probes into the solution. The pH measurement will be automati-

cally compensated for temperature.

B. PH CALIBRATION PROCEDURES

The meter is factory calibrated to simulate the ideal pH electrode (0 mV at pH

7.00 and 177.4 mV at PH 4, based on an ambient temperature of 77°F/25°C ).

1. Electronic Calibration of the Meter Only (without buffers)

•If applicable detach the ATC probe. Slide the LOCK SWITCH to the locked

position and press the POWER button. The LCD flashes momentarily.

•Attach the pH probe to the BNC SOCKETand press the PH/MV button to

select the pH mode ("PH" is displayed on the LCD).

•To adjust the pH 4 default value, press the TEMP.C

button twice. The upper display will show "4.00"

and the lower display will show the pH 4 default

calibration value (Fig.3). Use the UP and DOWN

buttons to adjust the value.

Fig. 3

4.00

04.03

Fig. 2

026.1 °C

See Fig.1, Pg.4 for inputs & button locations

- 6 -

•To adjust the pH 7 default value, press the

TEMP.C button again. The upper display will

show "7.00" and the lower display will show the

PH 7 default calibration value (Fig.4). Use the

UP and DOWN buttons to adjust the value.

•To adjust the pH 10 default value, press the

TEMP.C button again .The upper display will

show "10.00" and the lower display will show the

pH 10 default calibration value (Fig.5). Use the

UP and DOWN buttons to adjust the value.

Press the TEMP.C button again to exit.

NOTE: To skip any of the above procedures, press the Temp.C button twice.

The pH calibration values you set will become the default values. This is

convenient when pH 4, pH 7, and pH 10 buffer solutions are not available.

2. Chemical Calibration of the Meter and Electrode (buffers required)

Buffer solutions and a pH electrode are needed to perform the following

procedures.

Two Point Calibration

•Connect the PH electrode to the BNC SOCKET.

•Ensure that the temperature setting is adjusted to the temperature of the

pH buffer solution. See TEMPERATURE COMPENSATION on page 5.

•Press the PH/MV button and select the pH mode. "PH" is displayed on

the LCD.

PH 7 Calibration

•Rinse the electrode with distilled water and immerse the electrode into the

pH7 buffer solution.

•Press the CAL button. The upper display

flashes "CAL” and the lower display shows

the default calibration value (Fig.6).

•After approximately 5 seconds, the meter

calibrates itself automatically. The upper

display will show the calibrated value, the

lower display will show temperature (Fig.7).

PH 4 or PH 10 Calibration

•Rinse the electrode with distilled water and

immerse the electrode in the pH4 or pH10

buffer solution.

•Press the CAL Button. The upper display

Fig.6

CAL

7.00

See Fig.1, Pg.4 for inputs & button locations

Fig. 4

7.00

07.12

Fig. 5

10.00

10.02

Fig.7

7.00

25.00

- 7 -

shows "CAL" and the lower display shows

the default calibration value (Fig.8).

•"CAL" will flash on the LCD for around 5

seconds. After that, the meter calibrates

itself automatically. The upper display will

show the calibrated value, the lower display

will show temperature (Fig.9).

•Rinse the electrode again.

•To ensure the highest degree of accuracy,

repeat calibration procedures at least two

more times, using fresh solution.

Single Point Calibration

Single point calibration can be performed using the pH7 calibration instruc-

tions. For the most accurate measuring results, two point calibration is

recommended.

3. Procedures for meters that are out-of-calibration by more than 1 pH

of the Calibration Solution.

1 pH of pH 7, (when the measurement is >pH 8 or <pH 6)

1 pH of pH 4, (when the measurement is >pH 5 or <pH 3)

1 pH of pH 10, (when the measurement is >pH 11 or <pH 9)

•Connect the pH electrode to the PH BNC INPUT SOCKET. Slide the

LOCK SWITCH to the locked position and press the POWER button. The

LCD flashes momentarily. Press the PH/MV button and select the pH

mode. "PH" is displayed on the LCD.

•Set the Manual Temperature Compensation value to 77°F/25° (page 5).

•Rinse the electrode with distilled water and place it into a standard solu-

tion (pH 7, pH 4 or pH 10). The PH reading is displayed on the LCD.

For pH7: Adjust the PH7 CAL. until the reading is within pH6 ~ pH8,

pH4: Adjust the PH4/PH10 CAL. until the reading is within pH3 ~ pH5,

pH10: Adjust the PH4/PH10 CAL. until the reading is within pH9 ~ pH11.

•Complete the calibration by using the Single or Two Point Calibration

procedures on pages 6 and 7.

C. MEASUREMENT PROCEDURES

1. Temperature

•Plug the ATC temperature probe into the OPTIONAL PROBE INPUT

SOCKET.

•Slide the LOCK SWITCH to the locked position and press the POWER

See Fig.1, Pg.4 for inputs & button locations

Fig. 8

CAL

4.00

Fig. 9

4.00

25.0

- 8 -

button. The LCD flashes momentarily.

•Press the °C/°F button to select the desired unit of measure.

•Place the temperature probe into the solution and the LCD will display the

measurement.

2. PH Measurement

Once the unit has been calibrated:

•Connect the pH Electrode to the PH BNC INPUT SOCKET.

•Press the PH/MV button to select the pH mode. ("PH" appears on the

LCD).

•Place the electrode into the solution. The pH measurement is displayed.

•Rinse the electrode with distilled water after each use.

3. mV Measurement

The mV (millivolt) mode, enables the user to make ion-selective, oxidation-

reduction potential (ORP), and other precise mV measurements.

•Press the PH/MV button and select the mV mode ("mV" appears on the

LCD).

•Place the electrode into the solution. The mV measurement is displayed.

•Rinse the electrode with distilled water after each use.

4. Hold

•During the measuring procedure, press the HOLD button to freeze the

display. The LCD will display the word: "HOLD."

•Press the HOLD button again to exit.

5. Maximum / Minimum

To record the maximum and minimum readings:

•Press the REC button once. "REC" appears on the LCD.

•Press the REC button again. "REC Max" and the maximum measure-

ment appear on the LCD. (To delete the maximum measurement, press

the HOLD button for at least 2 seconds. When released, the LCD dis-

plays only "REC".)

•Press the REC button again. "REC Min" and the minimum measurement

appear on the LCD. (To delete the minimum measurement, press the

HOLD button for at least 2 seconds. When released, the LCD displays

only "REC".)

•To exit the this function, press and hold the REC button for at least 2

See Fig.1, Pg.4 for inputs & button locations

- 9 -

seconds, until the display reverts to the current reading.

D. AUTOMATIC SHUT OFF

The instrument has an automatic shut off function in order to prolong battery

life. After approximately 10 minutes without activity (no buttons pushed), the

meter will automatically shut off. To disable this feature, press the REC

button.

E. OVERLOAD INDICATOR

When the measurement is out of range, "- - - -" appears on the display.

Additional information may be contained in the individual probe instruction

manual(s).

F. BATTERY REPLACEMENT

•Replace the battery when the low battery icon is displayed in the left

corner of LCD. In-spec measurements may be made for

several hours after the low battery indicator appears.

•Slide the battery cover away from the instrument, remove the

battery and replace with a 9V battery (alkaline or heavy duty type).

•Close the battery cover.

G. RS232 PC SERIAL INTERFACE

The instrument features RS232 output via a 3.5 mm terminal. The signal

output is a 16-digit data stream that can be adapted to user-defined applica-

tions. A RS232 lead with the following connection is required to link the

instrument with the PC serial interface.

See Fig.1, Pg.4 for inputs & button locations

Meter (3.5 mm jack plug) PC (9W ‘D” Connector)

Center Pin ..................................Pin4 Pin 2 2.2 K

Ground/shield.............................Pin 2 Pin 5 resistor

- 10 -

The 16 digits data stream will be displayed in the following format:

D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

Each digit indicates the following status:

D0 End Word

D1 & D8 Display reading, Dl = LSD, D8 = MSD

E.g: If the display reading is 1234, then 08 to Ohs: 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 Annunciator for Display

°C=O1 °F=02

mV=18 mS=14

0-6F1 = 06 mg/L = 07

D13 The upper display data = 1, The lower display data = 2

D14 4

D15 Start Word

RS232 FORMAT: 9600, N, 8, 1

V. SPECIFICATIONS

Circuit Custom one-chip microprocessor LSI circuit.

Display 51 mm x 32 mm, dual function LCD display,

15mm (0.6”) digit size.

Input Impedance 1012 ohm

Temperature Compensation

for pH measurement

Manual 0-100°C, adjusted by the

°C/°F button.

Automatic (ATC) With optional probe, 1-65°C

Ph Calibration pH 7, pH 4, & pH 10, 3 points calibration

ensures the best linearity and accuracy.

PH Electrode Opt., any pH electrode with BNC connector.

Operating Temperature 0°C to 50°C (32°F to 122°F).

Operating Humidity Max. 80% RH.

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