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Manual Calibration
In manual calibration, the tester allows 1-point calibration for each measuring range.
You can use customized calibration solutions with known conductivity/TDS values to
calibrate the tester. . The following table shows acceptable conductivity/TDS ranges of
calibration solutions for each measuring range. Make sure your calibration solutions
are within the given ranges.
Selected
Acceptable Calibration Standard Range
Measuring Range
Conductivity
PU
2.0 - 200.0 uS/cm
LO
200 - 2000 uS/cm
HI
2.00 - 20.00 mS/cm
AUTO
Select a calibration standard nearer to application sample
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Use fresh calibration solutions. Measure conductivity/TDS values of the solution with a
meter known to be accurate. Prepare each solution in two beakers - one for rinsing
and the other for calibration. Rinse the electrode in de-ionized water before
calibration.
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ual calibr
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tion:
1. Switch on the tester. Make sure the tester is in measuring mode. Rinse the
electrode with the calibration standard that you intend to calibrate and then dip
the electrode in the other beaker with same calibration standard. Swirl gently to
create a homogenous sample and allow time for the reading to stabilize.
2. Press INC
INC or DEC
INC
INC
INC
DEC
DEC key to enter calibration mode. The 'CAL' indicator appears in
DEC
DEC
LCD. The display briefly shows 'CAL' and the number of points the tester will be
calibrated.
3. The upper display shows the measured conductivity/TDS reading of the solution
based on previous calibration (if any) and the lower display shows the default
(uncalibrated) conductivity/TDS reading.
Note:
Note: The tester shows error message 'Er.1' :
Note:
Note:
Note:
(a) If the reading is over range (Or) of selected measuring range of the tester ,
or
(b) If the default (uncalibrated) reading is not within the acceptable calibration
standard range.
INC
INC
DEC
DEC
Use INC
INC
INC and DEC
DEC
DEC keys to adjust the upper display to the correct conductivity/TDS
value of the calibration solution.
Note:
Note:
Note:
Note: The calibration adjustment window is ± 50% from the default reading.
Note:
Note:
Note:
Note: If you do not press INC
Note:
Note:
INC
INC
INC
INC or DEC
DEC
DEC
DEC key within 5 seconds, the tester shows the
DEC
confirmation 'CO' and returns to the measurement mode. However, the tester is
not calibrated to new values yet. The old calibration is still active. If this happens,
press INC
INC
INC or DEC
INC
INC
DEC key once again to enter calibration mode.
DEC
DEC
DEC
4. Wait for 5 seconds for the tester to automatically confirm the calibration by
displaying 'CO' and return to the measurement mode.
Note:
Note: To exit calibration mode without confirming the calibration, press HOLD/ENT
Note:
Note:
Note:
key before the automatic confirmation takes place.
Note:
Note:
Note:
Note:
Note: The tester shows error message 'Er.0' and returns to measuring mode if the
temperature of the calibration solution is not within 0°C to 50°C.
-7-
5. For multi-point calibration rinse the electrode in de-ionized water and repeat
step the above steps with another standard solution.
2
ATC
1
CAL
Measurement
Mode
OR
TDS/Salt
Displayed for
2.0 - 200.0 ppm
2 seconds and
Tester goes to
200 - 2000 ppm
Calibration mode
1.00 - 10.00 ppt
Figure 8: One-point manual calibration sequence for ECTestr11+
TDS Factor Setting
TDS factor is only applicable for TDSTestr11 & TDSTestr11+ models.
The factory default TDS factor is 0.71. You can adjust the TDS factor to suit
different samples of your applications.
T T T T T o c
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hang
TDS f
TDS f
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actor: : : : :
hang
TDS factor
TDS f
actor
1. Switch on the tester. Make sure the tester in measurement mode. Press HOLD
key to bring the tester to the HOLD mode.
2. Press INC
INC or DEC
INC
INC
INC
DEC key to enter the TDS factor setting mode.
DEC
DEC
DEC
3. The upper & lower displays of LCD show the last configured TDS factor. The
upper display is adjustable. Use the INC
The adjustable range is 0.4 to 1.0
Note:
Note:
INC
INC
Note:
Note:
Note: If you do not press INC
INC or DEC
INC
confirmation 'CO' and returns to measurement mode.
4. Wait for 5 seconds for the tester to automatically confirm the new setting by
displaying 'CO' and return to the measurement mode.
2
ATC
1
HOLD
t
HOLD
pp
6.35
Measurement
Mode
26.8
°C
HOLD mode
Figure 9: TDS Factor setting
.
HOLD/ENT
HOLD/ENT
HOLD/ENT
HOLD/ENT
3
3
4
CAL
ATC
CAL
ATC
CAL
ATC
After
5 sec.
1400
1413
1413
uS
uS
uS
CO
1 410
1410
Tester dipped in
Upper display reading
Confirmation
1413 uS std. solution
Adjusted to the actual
displayed for
Conductivity value of
2 seconds
Calibration std. solution
HOLD
HOLD
HOLD
HOLD
INC
INC or DEC
INC
INC
DEC
DEC
DEC
DEC key to adjust the TDS factor.
DEC
DEC
DEC
DEC key within 5 seconds, the tester shows the
3
3
4
After
5 sec.
0.71
0.50
0.50
OR
CO
0.71
0.71
TDS Factor setting mode
Confirmation
displayed for
2 seconds
-8-
Temperature Calibration
Temperature calibration need not be performed every time, unless the temperature
reading differs from that of an accurate thermometer. If temperature calibration is
performed, Conductivity/TDS/Salt calibration is mandatory.
1. Switch on the tester. Make sure the tester is in measuring mode. If required,
press °C/°F
°C/°F
°C/°F key to select the desired unit of measurement for temperature
°C/°F
°C/°F
(Celsius or Fahrenheit). Dip the tester into a solution of known temperature
and allow time for the temperature reading to stabilize.
2. Press INC
INC
INC
INC
INC or DEC
DEC
DEC
DEC key to bring the tester to the calibration mode. CAL' indicator
DEC
appears in LCD. Immediately press °C/°F
°C/°F key to switch to the temperature
°C/°F
°C/°F
°C/°F
calibration mode.
Note: When you enter calibration mode, if the conductivity/TDS/salt reading is outside
Note:
Note:
Note:
Note:
the specified range (Or), the tester shows 'Er.1' error message. You can still proceed
to the temperature calibration mode by pressing °C/°F
°C/°F
°C/°F key immediately. If the °C/°F
°C/°F
°C/°F
key is not pressed within 2 seconds, the tester exits the calibration mode and returns
to the measurement mode.
2
2
ATC
CAL
ATC
°C/
°F
1
MEAS
7.5 0
7.50
Measurement
Mode
OR
mS
mS
26.8
°C
7.5 0
Set required unit of
measurement for
temperature
Dipped in a solution
Calibration
of known temperature
mode
Figure 10: Temperature calibration sequence
3. The upper display shows the measured temperature reading based on the last set
offset (if any) and the lower display shows the default (uncalibrated) temperature
reading based on factory settings. Use INC
INC
INC
INC and DEC
INC
DEC keys to adjust the upper
DEC
DEC
DEC
temperature reading to the known temperature value of the solution.
Notes:
Notes:
Notes: The temperature adjustment window is ± 5°C (± 9°F) from the default reading.
Notes:
Notes:
4. Wait for 5 seconds for the tester to automatically confirm the temperature
calibration value by displaying 'CO' and return to the measurement mode.
Note: To exit temperature calibration mode without confirming the calibration, press
Note:
Note:
Note:
Note:
°C/°F
°C/°F
°C/°F
°C/°F
°C/°F key or HOLD/ENT
HOLD/ENT
HOLD/ENT
HOLD/ENT key before the automatic confirmation takes place.
HOLD/ENT
Note: The tester shows error message 'Er.0' and returns to measuring mode if the
Note:
Note:
Note:
Note:
temperature of the solution is not within 0°C to 50°C.
-9-
3
3
CAL
CAL
26.8
27.5
OR
°C
°C
26. 8
26.8
°C
°C
Temperature Calibration mode
4
CAL
ATC
MEAS
7.50
27.5
mS
°C
CO
27.5
°C
Confirmation
Measurement
mode
displayed for
2 seconds
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