MRC PH-230SD User manual

pH/mV SD card real time data logger
pH METER
Model : PH-230SD
Your purchase of this
pH METER with SD
CARD DATA LOGGER
marks a step forward for
you into the field of
precision measurement.
Although this meter a
complex and delicate
instrument, its durable
structure will allow
many years of use if
proper operating
techniques are
developed. Please read
the following
instructions carefully
and always keep this
manual within easy
reach.
OPERATION MANUAL

TABLE OF CONTENTS
1. FEATURES................................................................
.
1
2. SPECIFICATIONS......................................................
.
2
2-1 General Specifications..........................................
.
2
2-2 Electrical Specifications........................................
.
4
3. FRONT PANEL DESCRIPTION.....................................5
4. pH/mV MEASURING and CALIBRATION
PROCEDURE.............................................................7
4-1 pH measurement ( manual Temp. compensation ).............8
4-2 pH measurement ( ATC , automatic Temperature ).............8
4-3 mV Measurement.............................................................9
4-4 pH calibration .................................................................
.
9
5. OTHER FUNCTION....................................................
.
13
5-1 Data Hold........................................................................13
5-2 Record ( Max./ Min. readin
g
)...........................................
.
13
5-3 LCD Backli
g
ht ON/OFF......................................................14
6. DATALOGGER...........................................................
.
14
6-1 Preparation before execute datalo
gg
er function..................14
6-2 Auto Datalo
gg
er ( Set samplin
g
time 1 second )............≧15
6-3 Manual Datalo
gg
er ( Set samplin
g
time = 0 second ).........
.
16
6-4 Check time information.....................................................17
6-5 Check samplin
g
time information.......................................17
6-6 SD Card Data structure.....................................................17
7. Saving data from the SD card to the computer............19
8. ADVANCED SETTING.................................................21
9. POWER SUPPLY from DC ADAPTER............................
.
26
10. BATTERY REPLACEMENT.........................................
.
26
11. SYSTEM RESET.......................................................
.
27
12. RS232 PC SERIAL INTERFACE..................................27
13. OPTIONAL ACCESSORIES........................................
.
28
14. PATENT..................................................................
.
30

1. FEATURES
* pH : 0 to 14.00 pH, mV ( ORP ) : ± 1999 mV.
* pH measurement can select ATC or manual Temp. adj..
* Optional ATC probe for pH measurement.
* pH measurement can make the auto calibration for
pH 7, pH 4 and pH 10 or other value.
*Real time SD memory card Datalogger, it Built-in Clock
and Calendar, sampling time set from 1 sec to 8 hour
59 min. 59 sec.
* Manual datalogger is available ( set the sampling
time to 0 ), during execute the manual datalogger
function, it can set the different position ( location ) No.
( position 1 to position 99 ).
* Innovation and easy operation, computer is not need to
setup extra software, after execute datalogger, just take
away the SD card from the meter and plug in the SD card
into the computer, it can down load the all the measured
value with the time information ( year/month/date/
hour/minute/second ) to the Excel directly, then user can
make the further data or graphic analysis by themselves.
* SD card capacity : 1 GB to 16 GB.
* LCD with green light backlight, easy reading.
* Can default auto power off or manual power off.
* Data hold, record max. and min. reading.
* Microcomputer circuit, high accuracy.
* Power by UM3/AA ( 1.5 V ) x 6 batteries or DC 9V adapter.
* RS232/USB PC COMPUTER interface.
* Wide applications: water conditioning, aquariums,
beverage, fish hatcheries, food processing, photography,
laboratory, paper industry, plating industry, quality
control, school & college, water conditioning.
1

2. SPECIFICATIONS
2-1 General Specifications
Circuit Custom one-chip of microprocessor LSI
circuit.
Display LCD size : 52 mm x 38 mm
LCD with green backlight ( ON/OFF ).
Measurement pH
Function ORP ( mV )
Datalogger Auto 1 sec to 8 hour 59 min. 59 sec.
Sampling Time
@ Sampling time can set to 1 second,
Setting range but memory data may loss.
Manual Push the data logger button
once will save data one time.
@ Set the sampling time to
0 second.
@ Manual mode, can also select the
1 to 99 position ( Location ) no.
Memory Card SD memory card. 1 GB to 16 GB.
Advanced * SD memory card Format
setting * Set clock time ( Year/Month/Date,
Hour/Minute/ Second )
*Set sampling time
*Auto power OFF management
*Set beep Sound ON/OFF
*Decimal point of SD card setting
*Set temperature unit to or℃℉
*Set pH manual Temp. compensation value
Data Hold Freeze the display reading.
Memory Recall Maximum & Minimum value.
Sampling Time Approx. 1 second.
of Display
Data Output RS 232/USB PC computer interface.
* Connect the optional RS232 cable
UPCB-02 will get the RS232 plug.
* Connect the optional USB cable
USB-01 will get the USB plug.
2

Operating 0 to 50 .℃
Temperature
Operating Less than 85% R.H.
Humidity
Power Supply *
A
Alkaline or heavy duty DC 1.5 V battery
( UM3, AA ) x 6 PCs, or equivalent.
*
A
DC 9V adapter input. ( AC/DC power
adapter is optional ).
Power Current Normal operation ( w/o SD card save
data and LCD Backlight is OFF) :
Approx. DC 14 mA.
When SD card save the data and LCD
Backlight is OFF) :
Approx. DC 37 mA.
*
A
If LCD backlight on, the power
consumption will increase approx.
12 mA.
Weight 489 g/1.08 LB.
Dimension 177 x 68 x 45 mm (7.0 x 2.7x 1.9 inch)
Accessories * Instruction manual......................1 PC
Included
Optional * PH electrode.......................
Accessories PE-03, PE-11, PE-01, PE-02, PE-07,
PE-06HD, PE-04HD, PE-05T, PE-03K7
* ATC Temp. probe.................TP-07
* pH 7 buffer solution............. PH-07
* pH 4 buffer solution............. PH-04
* ORP Electrode.....................
.
ORP-14
* Hard carrying case...............CA-06
* Soft carrying case................
.
CA-05A
SD memory card ( 1 GB )
SD memory card ( 2 GB )
AC to DC 9V adapter.
USB cable, USB-01.
RS232 cable, UPCB-02.
Data Acquisition software,SW-U801-WIN.
3

2-2 Electrical Specifications (23±5 )℃
pH Optional,
Electrode Any pH electrode with BNC connector.
Measurement pH 0 to 14 pH
mV -1999 mV to 1999 mV
Input 10^12 ohm
Impedance
Temperature Manual 0 to 100 , be adjusted by℃
Compensation push button on front panel.
for pH Automatic With the optional temperature
measurement ( ATC ) probe ( TP-07 )
0 to 65 .℃
pH pH7, pH4, and pH10, 3 points calibration
Calibration ensure the best linearity and accuracy.
Measurement Range Resolution Accuracy
pH 0 to 14 pH 0.01 pH ± (0.02 pH + 2 d)
mV ( ORP ) 0 to 1999 mV 1 mV ± (0.5% + 2 d)
* pH accuracy is based on calibrated meter only.
4

3. FRONT PANEL DESCRIPTION
5

3-1 Display
3-2 Power Button ( Backlight Button )
3-3 Hold Button ( ESC Button )
3-4 REC Button ( Enter Button )
3-5 Button▲
3-6 Button ( Function Button )▼
3-7 Time Button
3-8 Logger Button ( SET Button, Sampling check )
3-9 Stand
3-10 Battery Compartment/Cover
3-11 Battery Cover Screw
3-12 Tripod Fix Nut
3-13 Temp. Socket ( pH ATC Socket )
3-14 pH Socket ( BNC Socket )
3-15 DC 9V Power Adapter Input Socket
3-16 Reset Button
3-17 RS-232 Output Terminal
3-18 SD card socket
6

4. pH/mV MEASURING and
CALIBRATION PROCEDURE
The meter default function are following :
*The display unit is set to pH.
*The temperature unit is set to .℃
*Manual ATC ( without connect the ATC probe )
*Auto power off.
*The sampling time of data logger function is
2 seconds.
Fig. 2
If the meter is first time to connect
the pH electrode, it should make the
calibration before operation, the
calibration procedures refer to
chapter 4-4, page 9.
7

4-1 pH measurement ( manual Temp. compensation )
1)Power on the meter by pressing " Power Button "
( 3-2, Fig. 1 ) once.
2)Prepare the pH Electrode ( optional ), install the
" Probe Plug " ( 4-1, Fig. 2 ) into the " pH Socket/BNC
Socket " ( 3-14, Fig. 1 ).
3)Adjust the manual Temp. value same as the
solution's temperature exactly, the procedures
refer chapter 8-8, page 25.
4)Hold the " Electrode Handle " ( 4-2, Fig. 2 ) by hand
and let the " Sensing head " ( 4-3, Fig. 2 ) immersed
wholly into the measured solution and little shake the
electrode.
5)The main display will show the pH value, the
bottom display will show the setting manual Temp.
value.
4-2 pH measurement ( ATC , automatic Temperature )
1)All the procedures are same as
5-1 pH measurement ( manual Temp. compensation)
but should prepare one temperature probe ( optional,
TP-07 ), insert the TP-07's plug into the " Temp. Socket "
( 3-13, Fig. 1 ), immerse the sensing head of temperature
probe ( TP-07 ) into the measurement solution.
2)The main display will show the pH value, the bottom
display will show the sensing Temp. value of the
measured solution ( measured from ATC probe, TP-07 ).
8

When not use the Electrode, it should immerse
the " Electrode sensing head " ( 4-3, Fig. 2 ) into
the " Protection bottle " ( 4-4, Fig. 2 )
4-3 mV Measurement
The instrument build in mV ( millivolt ) measurement
function, which enable you to make ion-selective, ORP
(oxidation-reduction potential), and other precise mV
measurements.
1)Press the " Function Button " ( 3-6, Fig. 1 ) once,
the Display unit " pH " will change to " mV "
* Press the : Function Button " once will return to
" pH " function.
2)Prepare the ORP Electrode ( optional, ORP-14 ), install
the " Probe Plug " of ORP electrode into the " pH
Socket/BNC Socket " ( 3-14, Fig. 1 ).
3)The Display will show the mV value.
4-4 pH calibration
Calibration Consideration
The most ideal pH ELECTRODE generates 0 mV at pH
7.00 ( 177.4 mV at pH 4 ) and meter has been always
calibrated with signals which simulate the most ideal pH
ELECTRODE ( based on 25 ambient environment ).℃
However not every pH ELECTRODE is as accurate as the
most ideal one, so calibration procedures are necessary
to be done before the first time measurement.
In addition to the first time measurement, users are also
recommended to execute the calibration procedures to
ensure the high accuracy measurement.
9

Required Equipment for Calibration
1)pH ELECTRODE ( optional ).
2)pH buffer solutions ( optional ).
Calibration Procedure
1)Prepare the pH Electrode ( optional ), install the
" Probe Plug " ( 4-1, Fig. 2 ) into the " pH Socket/BNC
Socket " ( 3-16, Fig. 1 ).
2)Power on the meter by pressing " Power Button "
( 3-2, Fig. 1 ) once.
3)Adjust the " Temperature Compensation Value " to
make it same as the temperature value of the pH
buffer solution.
* Manual temperature compensation value
adjustment procedure, refer to 8-8, page 25.
* Automatic temperature compensation, it
should plug in the ATC probe ( optional, TP-07 ).
.
4)Hold the " Electrode Handle " ( 4-2, Fig. 2 ) by hand
and let the " Sensing head " ( 4-3, Fig. 2 ) immersed
wholly into the measured solution and little shake the
probe. Display will show the pH value.
* If use the ATC probe, should imerse the
ATC ptobe into the solution together.
10

5)Use the two fingers to press the " REC Button " ( 3-4,
Fig 1 ) and " HOLD Button " ( 3-3, Fig. 1 ) at the
same time. Until Display will show the following screen
then release the both fingers.
PH
CAL
6)Press the " Button " ( 3-5, Fig. 1 ) or " Button "▲▼
( 3-6, Fig. 1 ) once in sequence to select the following
screen.
a For pH 4.00 calibration
4.00
CAL
b For pH 7.00 calibration
7.00
CAL
c For pH 10.00 calibration
10.00
CAL
d Clear the existing calibration data
CLr
CAL
11

*After the above a, b, c screen is selected, then cooperate
the relative standard solution, for example the
b screen should cooperate the pH 7.00 standard solution.
a screen should cooperate the pH 4.00 standard solution.
Press the " Enter Button " ( 3-4, Fig. 1 ) will
save the calibration data and finish the calibration
procedures.
*If select the d screen, press the " Enter Button "
( 3-4, Fig. 1 ) will clear existing calibration data.
7)The complete procedures should execute
the two calibration points :
pH7 calibration
pH4 calibration ( or pH10 calibration )
* The calibration procedures should execute start from
pH7 calibration then follow pH4 ( or pH10 ) calibration.
* Rinse the electrode with distilled water again when
make each point calibration ( pH7, pH4 or pH10 ).
* Repeat above two points procedures two times at least.
12

5. OTHER FUNCTION
5-1 Data Hold
During the measurement, press the " Hold Button " ( 3-3,
Fig. 1 ) once will hold the measured value & the LCD will
display a " HOLD " symbol.
Press the " Hold Button " once again will release the data
hold function.
5-2 Data Record ( Max., Min. reading )
1)The data record function records the maximum and
minimum readings. Press the " REC Button " ( 3-4, Fig.
1 ) once to start the Data Record function and there
will be a " REC. " symbol on the display.
2)With the " REC. " symbol on the display :
a)Press the " REC Button " ( 3-4, Fig. 1 ) once, the
" REC. MAX. " symbol along with the maximum value
will appear on the display.
If intend to delete the maximum value, just press
the " Hold Button " ( 3-3, Fig. 1 ) once, then the
display will show the " REC. " symbol only & execute
the memory function continuously.
b)Press the " REC Button " ( 3-4, Fig. 1 ) again, the
" REC. MIN. " symbol along with the minimum value
will appear on the display.
If intend to delete the minimum value, just press
the " Hold Button " ( 3-3, Fig. 1 ) once, then
the display will show the " REC. " symbol only &
execute the memory function continuously.
c)To exit the memory record function, just press the
" REC " button for 2 seconds at least. The display will
revert to the current reading.
13

5-3 LCD Backlight ON/OFF
After power ON, the " LCD Backlight " will light
automatically. During the measurement, press the
" Backlight Button " ( 3-2, Fig. 1 ) once will turn OFF the
" LCD Backlight ".
Press the " Backlight Button " once again will turn ON the
" LCD Backlight " again.
6. DATALOGGER
6-1 Preparation before execute datalogger function
a. Insert the SD card
Prepare a " SD memory card " ( 1 GB to 16 GB, optional ),
insert the SD card into the " SD card socket " ( 3-20, Fig. 1).
The front panel of the SD card should face against the
down case.
b. SD card Format
If SD card just the first time use into the meter, it
recommend to make the " SD card Format " at first. ,
please refer chapter 8-1, page 21.
c. Time setting
If the meter is used at first time, it should to adjust the
clock time exactly, please refer chapter 8-2, page 22.
d. Decimal format setting
The numerical data structure of SD card is
default used the " . " as the decimal, for
example "20.6" "1000.53" . But in certain
countries ( Europe ...) is used the " , " as the
decimal point, for example " 20, 6 "
"1000,53". Under such situation, it should
change the Decimal character at first, details
of setting the Decimal point, refer to Chapter
8-6, page 24. 14

6-2 Auto Datalogger ( Set sampling time 1 second )≧
a. Start the datalogger
Press the " REC Button ( 3-4, Fig. 1 ) once , the LCD will
show the text " REC ", then press the " Logger Button "
( 3-8, Fig. 1 ), the bottom text " DATALOGGER " will
flashing, at the same time the measuring data along the
time information will be saved into the memory circuit.
Remark :
*
How to set the sampling time, refer to Chapter 8-3
page 23.
*
How to set the beeper sound is enable, refer to
Chapter 8-5, page 24.
b. Pause the datalogger
During execute the Datalogger function , if press the
" Logger Button " ( 3-8, Fig. 1 ) once will pause the
Datalogger function ( stop to save the measuring data
into the memory circuit temporally ). In the same time
the the text of " DATALOGGER " will be no flashing.
Remark :
If press the " Logger Button " ( 3-8, Fig. 1 ) once again
will execute the Datalogger again, the bottom text of
" DATALOOGER " will flashing .
c. Finish the Datalogger
During pause the Datalogger, press the " REC Button "
( 3-4, Fig. 1) continuously at least two seconds, the " REC "
indication will be disappeared and finish the Datalogger.
15

6-3 Manual Datalogger ( Set sampling time = 0
second )
a. Set sampling time is to 0 second
Press the " REC Button ( 3-4, Fig. 1 ) once , the LCD will
show the text " REC ", then press the " Logger Button " (
3-8, Fig. 1 ) once, the bottom text " DATALOGGER " will
flashing once and Beeper will sound once, at the same
time the measuring data along the time information will be
saved into the memory circuit. The lower Display will show
the Position ( Location ) no. and saved into the SD card too.
Remark :
During execute the Manual Datalogger, press the " ▲
Button " ( 3-5, Fig, 1 ) the lower no. ( position no. ) will
flashing. It can use the " Button " ( 3-5, Fig. 1) or "▲
Button " ( 3-6, Fig. 1 ) to set the measuring position▼
( 1 to 99, for example room 1 to room 99 ) to identify the
measurement location , the lower Display will show P x
( x = 1 to 99 ).
b. Finish the Datalogger
Press the " REC Button " ( 3-4, Fig. 1) continuously at
least two seconds, the " REC " indication will be
disappeared and finish the Datalogger.
16

6-4 To check the time information
During the normal measurement screen ( not execute
the Datalogger ),
1)If press " Time Button " ( 3-7, Fig. 1 ) once , the lower
LCD display will present the time information of
Hour/Minute/Second ( h.m.s ) in the lower Display.
2)If press " Time Button " ( 3-7, Fig. 1 ) once again , the
lower LCD display will present the time information of
Year/Month/Date ( yy.mm.dd ) in the lower Display.
3)If press " Time Button " ( 3-7, Fig. 1 ) once again ,
the LCD will return to normal screen.
6-5 Check sampling time information
During the normal measurement screen ( not execute the
Datalogger ), If press " Sampling Button " ( 3-8, Fig. 1 )
once , the lower LCD display will present the Sampling
time information in second unit.
6-6 SD Card Data structure
1)When the first time, the SD card is used into the meter,
the SD card will generate a route :
PHA01
17

2)If the first time to execute the Datalogger,
under the route PHA01\, will generate a new
file name PHA01001.XLS.
After exist the Datalogger, then execute again,
the data will save to the PHA01001.XLS until
Data column reach to 30,000 columns, then
will generate a new file, for example PHA01002.XLS
3)Under the folder PHA01\, if the total files more
than 99 files, will generate anew route, such as
PHA02\ ........
4)The file's route structure :
PHA01\
PHA01001.XLS
PHA01002.XLS
.....................
PHA01099.XLS
PHA02\
PHA02001.XLS
PHAA02002.XLS
.....................
PHA02099.XLS
PHAXX\
.....................
.....................
Remark :
XX : Max. value is 10.
18