REED SD-230 User manual

Model
pH/ORP Meter/
Datalogger
SD-230
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Instruction
Manual
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
INSTRUMENTS

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2
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
INSTRUMENTS
Table of Contents
Features............................................................................................ 3
Specications................................................................................4-5
Instrument Description ..................................................................... 6
Operating Instructions.................................................................6-11
Function Defaults........................................................................... 6
pH Measurement (Manual Temp. Compensation) .......................... 6
pH measurement (ATC).................................................................. 6
mV Measurement .......................................................................... 7
Calibration ..................................................................................... 7
Required Equipment for Calibration................................................ 7
Calibration Procedure .................................................................7-8
Data Hold ...................................................................................... 8
Data Record (Max., Min. reading)...................................................8
Backlight ON/OFF.......................................................................... 9
Datalogger..................................................................................... 9
Auto Datalogger........................................................................9-10
Manual Datalogger....................................................................... 10
Checking the Time....................................................................... 10
Check Sampling Time Information................................................ 10
SD Card Data Structure............................................................... 11
Data Transfer from SD card to Computer..................................... 11
Advanced Settings ....................................................................12-14
SD memory card Format ............................................................. 12
Set Clock Time .......................................................................12-13
Set sampling time ........................................................................ 13
Auto power OFF management..................................................... 13
Set Beeper Sound ON/OFF ......................................................... 13
Setting the Decimal point on the SD Card.................................... 14
Select the Temperature unit to °C or °F........................................ 14
Set pH Manual Temperature Compensation value........................ 14
ESC............................................................................................. 14
PC Serial Interface.......................................................................... 15
System Reset ................................................................................. 16
Battery Replacement...................................................................... 16

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Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
INSTRUMENTS
Features
• Meter can select between ATC or manual temperature adjustment
• Three Point Calibration
• Accepts any pH Electrode with a BNC connector
• Real time SD memory card datalogger with a built-in clock and
calendar
• Sampling time set from 1 second to 3600 seconds
• Meter can switch to a Manual Datalogging
• No extra software needed, just plug the SD card into the computer
and it downloads directly to EXCEL
• SD card capacity: 1 GB to 16 GB
• Easy to read LCD with backlight
• Auto power off or manual power off
• Data hold, record max. and min. reading
• High accuracy microcomputer circuit
• Power by UM3/AA (1.5 V) x 6 batteries
• USB/RS232 Computer interface
Specifications
Circuit: Custom microprocessor LSI circuit
Display: 52mm x 38mm LCD with backlight
Units: pH or ORP (mV)
pH Electrode: Any pH electrode with BNC connector (optional)
Input Impedance: 1012ohm
Temp. Compensation: Manual (1-100°C), ATC (0-65°C)
pH Range: 0-14pH
pH Resolution: 0.01pH
pH Accuracy: ±(0.02pH + 2d)
mV Range: 0-1999mV continued ...

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Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
INSTRUMENTS
mV Resolution: 1mV
mV Accuracy: ±(0.5% + 2d)
Auto Sampling Time: 1, 2, 5, 10, 30, 60, 120, 300, 600, 1800,
3600 seconds
Memory Card: SD memory card, 1 GB to 16 GB
Sampling Time: Approx. 1 second
Data Output: USB/RS232 PC computer interface
Operating Temperature: 0-50°C (0-122°F)
Operating Humidity: Less than 85% R.H.
Power Supply: UM3/AA (1.5 V) x 6 batteries
Weight: 489g/1.08lb
Dimensions: 177 x 68 x 45mm (7.0 x 2.7 x 1.9”)
Optional accessories: 2G SD Card (SD-2GB)
pH Electrode (PE-01, PE-03, PE-11)
7.0 pH Buffer Solution (PH-07)
4.0 pH Buffer Solution (PH-04)
ATC Temperature Probe (TP-07)
ORP Electrode (ORP-14)
Power adapter (AP-9VA-110V)
Soft Carrying Case (CA-05A)
Tripod (BS-6)
USB Cable (USB-01)
Data Acquisition Software (SW-U801-WIN)
Visit us at www.reedinstruments.com for more information on our optional
accessories, or e-mail us at [e-mail]
Instrument Description

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5
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
INSTRUMENTS
Operating Instructions
1. Display
2. Power & Backlight Button
3. Hold & ESC Button
4. REC & Enter Button
5. Up Button
6. Down & Function Button
7. Time Button
8. Logger, Set, & Sampling
Time Check Button
9. Stand
10. Battery Compartment/Cover
11. Battery Cover Screws
12. Tripod Fix Nut
13. Temperature Socket
14. pH/BNC Socket
15. AC/DC 9V Power Adapter
Input Socket
16. Reset Button
17. USB/RS232 Output
18. SD card slot

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6
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
INSTRUMENTS
Function Defaults
The meter’s defaults are following:
Display unit: pH
Temperature unit: °C
Manual ATC (without a connected ATC probe)
Auto power off is ON
Datalogger Sampling Time: 2 seconds
Be sure to calibrate a pH Electrode for its rst use with this meter.
Please see the Calibration section of this manual for instructions.
pH Measurement (Manual Temp. Compensation)
1. Turn on the meter by pressing the Power Button.
2. Connect the Optional pH Electrode into the pH/BNC Socket.
3. Set the pH Manual Temperature Compensation value. Refer to the
Advanced Settings section for instructions.
4. Hold the Electrode Handle and let the Sensing head get fully im-
mersed the measured solution. Shake the pH Electrode to let the
probe’s internal air bubble drift out from the sensing head. The top
display will show the pH value and the bottom display will show
the setting for the Manual Temperature Compensation value.
pH measurement (ATC)
1. Plug in the optional Temperature Probe into the Temperature
Socket. Plug in the optional pH Electrode into the pH/BNC
Socket.
2. Immerse both the Temperature Probe and the pH Electrode into
the measured solution. Shake the pH Electrode to let the probe’s
internal air bubble drift out from the sensing head. The top display
will show the pH value and the bottom display will show the mea-
sured Temperature.
mV Measurement
This meter has a built in mV (millivolt) measurement function, which en-

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7
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
INSTRUMENTS
ables you to make ion-selective, ORP (oxidation-reduction potential), and
other precise mV measurements.
1. Press the Function Button so the unit switches from “pH” to “mV”.
To return to pH measurements, press the Function Button again.
2. Connect the optional ORP Electrode Plug into the pH/BNC
Socket.
3. The Display will show the mV value.
Calibration
This meter has been manufactured for use with an pH Electrode that
generates 0mV at pH7.00 (177.4mV at pH4). If your pH Electrode does not
meet those specications, calibration procedures are necessary. Calibra-
tion also ensures accurate measurements.
Required Equipment for Calibration
1. Optional pH Electrode
2. Optional pH Buffer Solutions
Calibration Procedure
1. Connect the Optional pH Electrode into the pH/BNC Socket.
2. Turn the meter on by pressing the Power Button.
3. Adjust the Temperature Compensation Value to make it same
as the temperature value of the pH buffer solution. Refer to the
Advanced Settings section of this manual for instructions. For
Automatic Temperature Compensation, plug in the optional ATC
probe.
4. Hold the Electrode Handle and let the Sensing head get fully im-
mersed the measured solution. Shake the pH Electrode to let the
probe’s internal air bubble drift out from the sensing head. The
top display will show the pH value. If using the ATC probe, both
probes into the solution together.
5. Press and hold the REC Button and the HOLD Buttons until the
screen displays “PH” on the main screen, and “CAL” on the lower
part of the screen. continued ...

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8
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
INSTRUMENTS
6. Press the Up and Down Buttons to select either “4.00” for pH 4.00
Calibration, “7.00” for pH 7.00 Calibration, “10.00” for pH 10.00
Calibration, or “CLr” to clear the existing calibration data. Select
the screen that matches your pH Buffer Solution. Press the Enter
Button to make your selection.
7. Two calibration points should be completed for the highest ac-
curacy. Calibration procedures should start from pH7 calibration
then with either pH4 or pH10 calibration. Rinse the electrode with
distilled water between each calibration. The Calibration should be
completed at least twice, for the highest accuracy.
Data Hold
While taking a measurement, press the Hold Button once and the mea-
sured value will hold on the screen, and a HOLD symbol will appear.
Press the Hold Button once again will release the data hold function.
Data Record (Max., Min. reading)
The data record function records the maximum and minimum readings.
Press the REC Button once to start the Data Record function and a “REC”
symbol will appear on the display. With the “REC” symbol on the display:
1. Press the REC Button once, and a ”REC. MAX.” symbol along
with the maximum value will appear on the display. To delete the
maximum value, press the Hold Button once and the display will
show a “REC.” symbol only and execute the memory function
continuously.
2. Press the REC Button again, and a “REC. MIN.” symbol along
with the minimum value will appear on the display. To delete the
minimum value, press the Hold Button once, and the display will
show a “REC.” symbol only and execute the memory function
continuously.
3. To exit the memory record function, press the REC button for 2
seconds. The display will revert to the current reading.
Backlight ON/OFF
After powering the meter ON, the LCD Backlight will turn on automati-

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9
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
INSTRUMENTS
cally. While taking measurements, press the Backlight Button and the LCD
Backlight will turn off. Press the Backlight Button once again to turn the
LCD Backlight back ON.
Datalogger
Preparation Before Executing the Datalogger Function:
1. Insert the optional SD card into the SD card socket.
2. Before you use an SD card with this meter for the rst time, it is
recommend to format the SD card. See Advanced Settings sec-
tion of this manual for instructions.
3. If this is the rst time the meter is used you need to adjust the
clock. See Advanced Settings section of this manual for instruc-
tions.
4. Now you need to set the decimal format. The numerical data
structure downloaded to the SD card is defaulted used the “ .
“ as the decimal, for example “20.6” “1000.53” . But in certain
countries the “ , “ is used as the decimal point, for example “ 20,
6 “ “1000,53”. See Advanced Settings section of this manual for
instructions on how to change the Decimal Character.
Auto Datalogger (Set sampling time ≥1 second)
1. Start Datalogging; press the REC Button, and the “REC” symbol
will appear on the LCD screen, then press the Logger Button, the
“REC” symbol will ash while the measuring data and time infor-
mation is being saved in memory. To set the sampling time, and to
toggle the beeper sound on or off, refer to the Advanced Settings
section of this manual.
2. Pause the Datalogging; while Datalogging, if press the Logger
Button once. While paused, the “REC” symbol will stop ashing.
Press the Logger Button again to resume Datalogging, and the
“REC” symbol will begin to ash again.
3. Stop Datalogging; while the Datalogger function is paused, press
the REC Button for 2 seconds. The “REC” symbol will disappear
indicating the Datalogging function has stopped. continued ...

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10
Pantone 534 Blue
Pantone 123 Yellow
Pantone 485 Red
Pantone 123 Yellow
Pantone 534 Blue
Black Rich Black -
20/20/20/100
Blue - 100/80/30/5
Yellow - 0/27/100/0
Red - 10/100/100/5
Yellow - 0/27/100/0
Blue - 100/80/30/5
Only if you REALLY need them:
Pantone 534 Blue - 100/80/30/5
Pantone 485 Red - 10/100/100/5
Pantone 123 Yellow - 0/27/100/
INSTRUMENTS
Manual Datalogger (Set sampling time = 0 seconds)
1. Set sampling time is to 0 second; Press the REC Button, and the
“REC” symbol will appear on the LCD screen. Press the Logger
Button, and the “REC” symbol will ash once and one Beep will
sound, at the same time the measuring data along the time infor-
mation will be saved in memory. The lower Display will show the
Position (record) number, which is saved as well.
2. To Change the Position Number; press the Down Button and the
lower position number will ash on the display. Press the Up or
Down Buttons to set the Position Number (1 to 99) to help identify
the measurement location. The lower Display will show P x (x = 1
to 99). After the position number is selected, press the Enter But-
ton to conrm.
3. Stop Datalogging; press the REC Button for 2 seconds, and the
“REC” symbol will disappear indicating the Datalogging function
has stopped.
Checking the Time
During normal functions (not Datalogging), press the Time Check Button
and the lower LCD display will show the Year, Month/Date, Hour/Minute.
Check Sampling Time Information
During normal functions (not Datalogging), press the Sampling Button and
the lower LCD display will show the Sampling Time Information.
SD Card Data Structure
1. The rst time the SD card is used in the meter, the SD card will
generate a folder: PHA01