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

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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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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