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
8
7

- 4 -
Optional Measuring Procedure
Data Hold Memory Record
Max. Min. RS232 Output
PH Measuring Procedure
OR
Power On
Set manual temperature
compensation values on the
front panel
Automatic temperature
compensation by optional
ACT probe
Measurement
Power Management
OR
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
PH
4.00
04.03
Fig. 2
PH
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
PH
7.00
07.12
Fig. 5
PH
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.