Suntex SC-2300 User manual

1
Microprocessor
Benchtop
Conductivity/
Resistivity Meter
SC-2300
Operation
Manual

2
ContentTable
1. Specifications 1
2. Configuration
2.1 Display 2
2.2Socket 2
2.3 Keypad 3
3. Operation
3.1 Measurement 4
3.2 Measurement function and file bit shift 4
3.3 Temperature function and compensation 5
3.4AutoRead 5
4. Settings
Block diagram of settings 6
4.1Parametersettings 7
4.1.1 Entry of set-up mode 7
4.1.2 Settings of measurement mode 7
4.1.3Settingsofdatadeletion 7
4.1.4 Settings of baud rate(BAUD) 8
4.1.5 Settings of system time 9
4.2 Deletion of all stored data 10
4.3 System reset 10
Block diagram of calibration and temperature compensation settings 11
4.4 Settings of calibration parameter 12
4.4.1Electrode coefficient and calibration parameter 12
4.4.2Standardsolutioncalibrationparameter 13
4.4.3 Temperature compensation coefficient 13
Block diagram of operations in measurement mode 14
4.5 Auto/manual data storage 15
4.5.1 Auto storage 15
4.5.2 Manual storage 15
4.5.3 Data full 15
4.6 Data readout and output 16
4.6.1 Auto transmission 16
4.6.2 Manual readout and transmission 16
5. Calibration
Block diagram of Calibration 20
5.1 Standard solution preparation 21
5.2Calibrationmode 21
5.3 Entry of calibration mode 21

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5.3.1 Electrode coefficient calibration 21
5.3.2 Standard solution single-point calibration 21
5.3.3 Standard solution five-pointcalibration 22
5.3.4 Error message 22
6. Instruction set for RS232 23
7. Alternative fittings 23
8. Failure recovery 24
9.Maintenance 24

1
1.Specifications
Model SC-2300
Function µS/ mS/ MΩ/ Salt/ TDS/ TEMP
Cond. 0.00 uS/cm ~ 200.0 mS/cm in 5 measuring ranges for manual or auto switch
Res. 0.00~100.00 MΩ- cm
Salt 0.0~70.0ppt
TDS 0~2000ppm
Range
TEMP -10.0~+110.0°C
Cond. 0.01µS/cm
Res. 0.01 MΩ-cm
Salt 0.1 ppt
TDS 1 ppm
Resolution
TEMP 0.1°C
Cond. 0.5%(±1Digit)
Res. 1%(±1Digit)
Salt 0.5%(±1Digit)
TDS 0.5%(±1Digit)
Accuracy
TEMP ±0.2°C(±1Digit)
PT-1000 or NTC 30K auto recognition
Temperature
Compensation Auto / Manual selectable
Temperature
Coefficient
Non-linear / 0.00~20.00% Linear
Ref. Temperature Tref 25℃
Manual calibration Single point known standard solution or electrode constant calibration
Standard solution
calibration
Single or up to 5-point known standard solution calibration; default five standard solution
10/84/1413 uS/cm & 12.88/100 mS/cm adjustable
RS232 interface YES
Output Data logging 450 sets (measuring value, temp., date, time & ID)
Ambient temperature 0~50°C
Storage Temperature -20~+70°C
Display 3/4” LCD / backlit
Power 4 x AA / AC ADAPTOR
Battery Around 100…500hrs according to measuring range and whether the backlit is used
Protection Type IP43
Dimension (L x W x H) 220 x 190 x 70mm
Weight 0.8kg

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2.Configuration
2.1: Display:
2.2 Socket:
POWER : DC 6V Adaptor socket
RS-232 : RS-232 output socket
REC. : no function at the moment
T/P : External temperature probe socket (prohibited if using electrode which has combined
with temperature sensor).
EC/DO : Resistivity or Conductivity electrode waterproof socket
Set-up
mode
Measurement
mode
Measurement
unit
Auto temperature
compensation
Time reminder
Calibration
mode
Data
storage
mode
Low
battery
reminde
r
Data reading
/Transferring
mode
Data Storage ID
Storage ID
Data transferring
speed mode
Read mode
Auto mode

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2.3 Keypad:
: Power switch--- Push it to power on and push it again to power off
: Cond./Res./Salt/TDS measurement shift key; pushing it at any time to back to
measurement mode
: Enter calibration mode
: Auto read--- Push one time for startup and push again for cancellation.
: Upward or leftward key
: Downward or rightward key
: (ENTER) confirmation, execution, and confirmation for RS-232 manual output
: (Recall) Data recall key and measurement value selection key
: (Store) Data storage key
: Enter system parameter setup, see ch.4.1
: Delete all stored data, see ch.4.2
: System reset, see ch.4.3
: Shift among five manual ranges and the auto range recognition mode, see ch.3.1
: Enter calibration parameter settings, see ch.4.4
: Enter auto continual storage settings, see ch.4.5
: Enter auto continuation data transmission settings, see ch.4.6
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+
+
+
+
+
+

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3.Operation
3.1 Measurement:
Push key to power on the instrument. It will automatically show last measurement
and be ready for new measurement.
3.2 Measurement function shifting:
1.Push【MODE】to shift among Cond., Salt, and TDS in Cond. Mode. This function is unavailable
in Res. mode.
2.Push【ENT】+【MODE】to shift among five manual ranges (20.00µS /200.0µS /2000µS /20.00
mS /200.0 mS) and auto range shifting mode. When entering into auto range shifting mode,
symbol will disappear after 3 seconds.
Remark: Before measuring salt and TDS, please finish the calibration according to the
conductivity calibration steps, and then set the factor value according to the standard
solution of salt and TDS.
Push【ENT】+【MODE】
Push【ENT】+【MODE】
Push【ENT】+【MODE】
Push【ENT】+【MODE】
Push【ENT】+【MODE】
Push【ENT】+【MODE】
Push【MODE】to shift
to Salt measurement
Push【MODE】to shift
TDS measurement
Push toadjust
the salt value. Note:
Factor range is 0.4~1.5
Push to
adjust Total Dissolved
Solids. Note: Factor
ran
g
e is 0.4~1.5
Push【MODE】

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1. Push【ENT】for the next measurement
2. Push 【AUTO】or【MODE】
3.3 Temperature measurement and compensation:
1. Auto Temp. Compensation: Auto recognition of temperature probe system. (NTC30K or PT1000)
Push or to adjust the temperature within in ±5℃. Push keys simultaneously to
back to the original value.
2. Manual Temp. Compensation: Enter MTC 25℃automatically if no temperature probe. Push
or toadjustthetemperature.Push simultaneouslytobacktothedefaultvalue.
3. Temperature compensation: The temperature of the to-be-tested solution may not be 25℃. For
standardization, the conductivity value of the solution which is not at the temperature of 25℃ will
be calculated to that of solution at the temperature of 25℃.
4. According to the temperature coefficient required by the measurement, three kinds of temperature
compensation can be applied: Linear(Lin), Non-linear(nLin), and non compensation (0.00％). See
the setting method in ch. 4.4.3. Users can set by themselves as needed.
5. Temp. Coefficient (TC for abbreviation), the conductivity value of the solution will increase as the
temperature rises. TC may differ from different solution. See the formula as follows:
C25 Conductivity at 25℃
Ct Conductivity at T℃Formula 1: Ct = C25 { 1+β( T – 25 ) }
T Temp. of the tested solution
βTemp. Coefficient Formula 2: β= ( Ct－C25 ) / { C25 ( T－25 )}
6. How to measure the TC of the solution: If the user wants to get a more accurate value, the above
formula can be applied to measure the TC of the solution and set an appropriate TC on the machine.
Take 0.01N KCl as an instance, set the TC as non compensation (0.00%) in the machine. Control
the same solution respectively at 25℃and 20℃. You could acquire measurement at 25℃(C25) for
1413µS; and the measurement at 20℃(Ct) for 1278 µS. According to formula 2, β＝1.91%.
3.4 Auto Read:
In the measurement mode, push 【AUTO】to start and push 【ENT】to measure. Then, push
【ENT】to make the next measurement. Push【AUTO】or 【MODE】at any time will allow
backing to the measurement mode (See the following charts).
The symbol
twinkles for about 10
seconds to get a stable
va
l
ue.
The symbol stop
twinkling and a value will appear
after the measurement is stable.
Back to the measurement
Push【AUTO】
Push【ENT】

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4. Settings
Block diagram of settings
Push or to
modify the minute
Data overwriting settings Baud rate settings System time settings
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Power off
Push or to
modify the year
Push or to
modify the month
Push or
to modify the day
Push or to
modify the hour
Push or to select
other transmission speed:
1200, 2400, 4800 or 9600
Push o
r
to
select conductivity
or specific resistivity
Push o
r
to select
auto overwriting or
cancel overwriting
:ENTERkey
Push
【
STO
】
+ ，,,
Release + 【STO】
to delete all stored data
Push
【
CAL
】
+,
Release + 【CAL】
for system reset
Push
【
MODE
】
+,
Release + 【MODE】
to ente
r
measuremen
t
mode
Settings of
measurement mode
(Data Clean) (RS 232)

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4.1 Parameter settings:
4.1.1 Entry of set-up mode:
In the power-off status, push【MODE】first and then push 【 】 to power on the machine;
then please release 【 】first and then 【MODE】to enter the parameter setting mode.
Use or toselect.
4.1.2 Settings of measurement mode:
4.1.3 Settings of data deletion:
Enter “Settings of data deletion”
Push 【ENT】to enter
Push or to select
MΩ-cm、µS/cm
Enter “Settings of data deletion”
Push【ENT】to confirm it
Push【ENT】to enter
Enter “Settings of baud rate”
Push【ENT】to confirm it
Push or to select auto
overcast or cancel auto overcast

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4.1.4 Settings of baud rate (BAUD):
Enter “Settings of RS-232 baud rate”
Push【ENT】to enter
Push【ENT】to confirm it
Push or
to select
Enter “Settings of system
Push or
to select
Push or
to select

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4.1.5 Settings of system time:
Enter “Settings of system time”
Push【ENT】to ente
r
Push or to modify the
hour, then push【ENT】to confirm it
Push or to modify the year,
then push【ENT】to confirm it
Push or to modify the
month, then push【ENT】to confirm it
Push or tomodifythe
date, then push【ENT】to ensure
Back to “Setting of measurement
mod, or push
【MODE】to back to
measurement mode
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Push or to modify the
minute, then push 【ENT】to confirm it

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4.2 Deletion of all stored data:
In the power-on status, push【STO】first and then【 】; after that,release【 】first and
then release【STO】to enter the data deletion mode.
4.3 System reset:
In the power-off status, push【CAL】first and then 【 】; after that, release【】first and
then release【CAL】to enter the system reset page.
Factory defaults:
Data deletion settings: Auto
(BAUD) settings: 4800
Data transmission settings: read the stored data on the display (Sto diSP)
Push【ENT】to confirm to delete
all stored data or push
【MODE】to back to the
measurement mode
Back to the
measurement mode
Push【ENT】to confirm the
system reset; or push【MODE】
to back to the measurement mode
Back to the
measurement mode
10
(Data Clean)
(Initial Setting)

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Block diagram of calibration and temperature compensation settings
Settings in conductivity mode Settings in specific resistivity
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Measurement
mode
Push↑↓ to
adjust
compensation
coefficient
Push↑↓ to
adjust
compensation
coefficient
Power on
Measurement
mode
Push【ENT】+【CAL】
Push↑↓ to
adjust
compensation
coefficien
t
：ENTER key
Calibration and temperature
compensation settings.
Push 【ENT】+【CAL】
Power on
Electrode coefficient
calibration settings
Standard solution
calibration settings
Measurement
temperature coefficient
settings
Measurement temperature settings

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4.4 Settings of calibration parameter:
In the power-on status, push【ENT】first and then push【CAL】to enter set-up mode of calibration
parameter.Use toselect.
4.4.1 Electrode coefficient and calibration parameter:
Electrode coefficient and calibration parameter
=
Push or to set the temperature
Back to measurement mode
Push【ENT】to confirm it
Push【ENT】to confirm it
Push【ENT】to enter the settings
of calibration temperature
compensation coefficient
Push【ENT】to confirm
Push or
to select
Push or
to select

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4.4.2 Standard solution calibration parameter:
(Only suitable when the measurement unit is conductivity)
4.4.3 Temperature compensation coefficient:
Push【ENT】to confirm it
Push or to select
Back to measurement mode
Push【ENT】to confirm it
Push【ENT】to confirm it
Push【ENT】to confirm it
Back to measurement mode
Push or
to select
Push【ENT】to confirm it
Push or
to select
Push or to set the coefficient value

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In case of data full
unable to store,
will twinkle for
5 seconds
Block diagram of operations in measurement mode
Push or
to set the second
Manual read and transmission
Push【RCL】to shift circularl
y
amon
g
4 modes
After
transmission,
back to the
measurement
mode
Back to the
measurement
mode
Appear recently stored data
Push or to
modify the inquiry site
Read the ID, and push or
to in
q
uire other data throu
g
h ID
Read the stored year
Read the stored date
Read the stored time
Appear the original ID
Back to the
measurement
Push or to
set the ID number
Transmission mode
Power on
Data store full
Auto store
Push
【
ENT
】
+
【
S
T
O
】
Manual store
push【STO】
Storage
Appear the
original ID
Push or to
set the ID number
Push or to
set the minute
Continual
measurement and data
Cancel continual
stora
g
e
If twinkles,
it means that the
data is stored
Push【ENT】+【STO】to close
Back to the
measurement
mode
After
transmission,
back to the
measurement
mode
automatically
CELL direct
calibration
Std simple point
calibration
Std five point
calibration
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Back to the
measurement
mode
Back to the
measurement
mode
：ENTER key
Push or
to set the minute
Continual
transmission
Cancel
continual
sto
r
age
Push or
to set the second
Push【ENT】+【RCL】
Auto transmission
Push【ENT】+【RCL】
If twinkles,
it means that the
data is stored
Back to the
measurement
mode
The stored data is
transmitted to the display
The stored data is
transmitted through RS232
The calibrated data is
transmitted to the display
The stored data is transmitted
through RS232

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4.5 Auto/manual data storage:
4.5.1 Auto storage:
In the measurement mode, push【ENT】
first and then push【STO】to enter the
auto continual storage set-up mode.
4.5.2 Manual storage:
In the measurement mode, push【STO】
to enter manual store page.
4.5.3 Data full:
When the data full storage, the display
will twinkle as a reminder, and five
seconds later, it will back to the original
measurement mode.
According to step 4.2, delete all the data.
If under auto overwriting mode, there is
no reminder of data full.
Back to the
measurement mode
Push【ENT】to confirm it
Push or to set ID number;
Push 【ENT】to confirm the storage
Appear the original ID.
Push 【ENT】to confirm it
Push or to set ID number;
Push【ENT】to confirm it and ente
r
settings of automatic storage time.
Push or to set the
minute, and push for
confirmation and settings of
second
Push or to set the seconds,
and push for confirmation. (The
minimum value is 5 seconds)
Back to measurement
mode
If twinkles,
it means that the data
is stored
Push【ENT】＋【STO】to cancel
the auto store mode

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4.6 Data readout and output:
4.6.1 Auto transmission:
In the measurement mode, push【ENT】
first and then push【RCL】to enter auto
transmission.
4.6.2 Manual readout and transmission:
In the measurement mode, push【RCL】to
shift among 4 modes circularly, and push【ENT】
to enter.
Push or tosettheseconds,
and push【ENT】for confirmation.
(The minimum value is 5 seconds)
Back to measurement
mode
If
twinkles, it means that
the data is stored
Push【ENT】＋【RCL】to
cancel the auto store mode
Push【ENT】to enter, and the recently stored data will appear
Push or tomodifythe
inquiry site. Push Enter to confirm it
Push【ENT】to read the data storage date
Push【ENT】to read the stored time
Read the ID and push to inquire
other data according to the ID. Push enter to
read the data value and data storage year.
Back to measurement
mode
Push【ENT】
Push 【ENT】to read the temperature
valueofthedata
Push or to set the minute,
and push【ENT】for confirmation an
d
enter the second setting.

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B. Transmit the stored data through RS-232
Transmit all stored data through RS-232
C. Read the calibrated data on the display
C.1 Read the calibrated data on the display
Push【ENT】to transmit
After the transmission,
back to measurement
mode
Push【ENT】, and it will show the standard
solution value and electrode coefficient
Push【ENT】, and it will show the
calibrated temperature compensation
coefficientvalue
Back to
measurement mode
Push【ENT】
Push【ENT】, and it will show the
calibrationrecord
year
Push【ENT】, and it will show the calibration
recorddate
Push【ENT】, and it will show and the
calibration record
time