horiba LAQUAtwin-EC-11 User manual

CODE: GZ0000472457March, 2017
LAQUAtwin series (EC) Operation 12017 HORIBA Advanced Techno Co., Ltd.
Instruction Manual (Operation)
COMPACT WATER QUALITY METER
LAQUAtwin-EC-11, LAQUAtwin-EC-22,
LAQUAtwin-EC-33
Specifications
Items in package
Consumable parts sold separately
Part Names
Note
Press the switches 0.5 seconds or more unless
otherwise specified.
Initial Setup
Attaching/detaching the sensor
Note
Be careful not to twist the waterproof gasket.
Inserting/removing batteries
Electrode conditioning
Note
Before using the sensor for the first time or
after several days of disuse, perform electrode
conditioning.
Perform calibration after electrode condition-
ing.
1. Place some drops of the conditioning solu-
tion into the measurement cell.
2. Wait 10 min before use.
There is no need to switch the meter ON.
3. Clean the flat sensor with running water.
Model LAQUAtwin-EC- 11 22 33
Minimum sample volume 0.12 mL 
Range and resolution (valid digits)
Conductivity
0 to 199 S/cm:
200 to 1999 S/cm:
2.00 to 19.99 mS/cm:
1 S/cm
1 S/cm
0.01 mS/cm 
20.0 to 199.9 mS/cm: 0.1 mS/cm 
TDS 0.0 to 99.9 ppm:
100 to 999 ppm:
1000 to 9990 ppm:
0.1 ppm
1 ppm
10 ppm 
Calibration Up to 2 points 
Up to 3 points 
Accuracy*1
2% full scale (for each range) 
2% full scale (0 to 19.99 mS/cm)
5% full scale (20.0 to 199.9 mS/cm) 
Temperature display 0 to 50.0C
Target Electrical conductivity
Measurement
principle 2 electrode bipolar AC Titanium coated with Platinum black
Display Custom (monochrome) digital LCD with
backlight
Operating
environment 5 to 40C, 85% or less relative humidity (no condensation)
Power CR2032 batteries (2)
Battery life Approx. 400 h continuous operation*2
Outer dimen-
sions/mass 164 29 20 mm (excluding projections), Approx. 45 g (excluding batteries)
Main function Temperature compensation (2%/C fixed),
waterproof*3, auto stable/auto hold, auto-
matic power OFF
*1 Accuracy is the closeness of agreement between
the measured value and actual value of the stan-
dard solution in the measurement of the same
standard solution as the one used for the calibra-
tion. Temperature during the calibration and mea-
surement is the same. The error of standard
solutions and rounding error (1 digit) are not
included.
*2 The life period if the meter is used in the backlight
off mode. If the backlight is used, battery life will
shorten.
*3 IP67: no failure when immersed in water at a
depth or 1 meter for 30 minutes.
Please note that the meter can not be used
underwater
Items Quantity
Sensor S070 1
Meter 1
Storage case 1
Batteries CR2032 2
Standard solution 1413 μS/cm 1
12.88 mS/cm 1
Pipette 1
Conditioning solution 1
Instruction manual (Operation) 1
Instruction manual (Before use) 1
Items Specifications Part No.
Sensor S070, COND 3200459672
Standard
solution 514-22, 1413 μS/cm 3999960110
514-23, 12.88 mS/cm 3999960111
Conditioning
solution 514-20 3999960114
1 Measurement cell
2 Protection cover
3 Lithium batteries
4 MEAS switch
5 ON/OFF switch
6 CAL switch
7 Waterproof gasket
8 Strap eyelet
Attaching the sensor
1. Power OFF the meter.
2. Confirm that the waterproofing gasket is
clean and undamaged.
3. Slide the sensor onto
the meter so that
catch "A" on the back
of the meter fits into
hole "a" on the sen-
sor tongue as shown.
1
2
3
458
6
7
aA
Waterproof
gasket
Detaching the sensor
1. Power OFF the meter.
2. Lift the sensor tongue
tip and slide the sensor
a little away from the
meter.
3. Pull out the sensor all the way from the
meter.
Inserting the batteries
1. Power OFF the meter.
2. Slide both batteries into
the battery case as
shown.
Be sure to use two
CR2032 batteries, and put
them with the plus sides
(+) upwards.
Removing the batteries
1. Power OFF the meter.
2. Use a ball-point pen or
other tool to pry the batter-
ies out from the clips as
shown.
Battery
Battery clip

LAQUAtwin series (EC) Operation 2CODE: GZ0000472457
Basic Operation
Calibration
Calibration is required before measurement.
Use standard solution within the measurement
range in the specifications.
Tip
Calibration values are saved even if the meter
is switched OFF.
Calibration value is rewritten if calibration is
repeated using the same standard solution.
Measurement
Note
If a measured value is out of the specified
measurement range, "Or" is displayed for
upper range and "Ur" is displayed for under
range.
Ambient air may cause the measured values
to fluctuate. To reduce environmental interfer-
ence, close the protection cover.
When you have a problem with the calibration
or measurement, refer to frequently asked
questions.
Measurement display change
Measurement display change is available on
LAQUAtwin-EC-22 and LAQUAtwin-EC-33.
The display mode switches as follows by press-
ing the MEAS switch in the AS mode.
LAQUAtwin-EC-22:
Between conductivity and temperature alter-
nately
LAQUAtwin-pH-33:
Among conductivity, TDS, and temperature
Power ON
1. Press and hold the ON/
OFF switch.
The power is switched ON,
and the meter model num-
ber is displayed on the LCD.
Power OFF
1. Press and hold the ON/OFF switch.
The power is switched OFF.
Precaution on sample setting
Place an appropriate amount of a sample or stan-
dard solution into the measurement cell without
trapping bubbles inside. If not, the measurement
may be inaccurate.
Calibration points
The number of calibration points is dependent on
the meter model.
LAQUAtwin-EC-11:
Up to two-point calibration at 1413 μS/cm and
12.88 mS/cm
LAQUAtwin-EC-22 and LAQUAtwin-EC-33:
Up to three-point calibration at 1413 μS/cm,
12.88 mS/cm, and 111.8 mS/cm
Appropriate Too little
Cell Electrode
Cross-section of the measurement cell
Multi-point calibration
1. Open the protection cover and place some
drops of the standard solution into the
measurement cell.
Rinsing the sensor with the standard solution
beforehand will provide a more accurate cali-
bration as it will reduce sample crossover con-
tamination.
2. Close the protection cover and press the
CAL switch.
and blink, and the calibration value is
displayed.
After the calibration is complete, and
stop blinking and the measured value is dis-
played.
The calibration value at 25C is displayed for 1
s and the display returns to the measurement
mode automatically.
3. Open the protection cover and remove the
standard solution. Then remove moisture
on the sensor by gently dabbing with a soft
tissue.
This completes the 1st point calibration.
4. To perform 2nd point calibration, repeat
steps 1. to 3.
Calibration error
If blinks and Er4 (error dis-
play) appears, the calibration
has failed.
Perform electrode conditioning.
Check that the correct standard solution is used,
and repeat calibration after cleaning the sensor.
If the calibration repeatedly fails when using the
correct standard solution(s), the sensor may
have deteriorated. Replace the sensor with new
one.
Protection cover
Sample setting
1. Open the protection cover and put some
drops of sample into the measurement cell.
2. Close the protection cover.
Measurement mode
The auto stable (AS) mode and the auto hold
(AH) mode can be selected. Refer to " Mea-
surement mode change" (page 4) for the opera-
tion to set the measurement mode.
Auto stable (AS) mode
This is the default setting. appears when
the measured value meets the stability criteria.
If the value changes, disappears.
1. Confirm that the meter is in the measure-
ment mode, and place a sample on the sen-
sor.
When the read value meets
the stability criteria,
appears and the reading is
locked.
2. Document the displayed value when
appears.
If the read value does not meet the stability cri-
teria, disappears and the reading changes
with time.
Auto hold (AH) mode
appears when the measured value meets
the stability criteria. The reading then locks
and will not change until the MEAS switch is
pressed for the next measurement.
1. Confirm that the meter is in the measure-
ment mode, and place a sample on the sen-
sor.
2. Press the MEAS switch.
The auto hold function is acti-
vated.
blinks until the mea-
sured value has stabilized.
When the measured value is stable, stops
blinking and the displayed value is locked with
and displayed simultaneously.
3. Document the displayed value.
4. Press the MEAS switch.
The auto hold function is deactivated and
disappears.
Be sure to perform this step before starting the
next measurement. Or, you may mistake the
displayed hold value for the next measured
value.

LAQUAtwin series (EC) Operation 3CODE: GZ0000472457
Maintenance Appendix
Frequently asked questions
Storage
1. Clean the sensor with tap water.
2. Dab gently with soft tissue or cloth to
remove moisture on the sensor and meter.
Note
Especially be sure to treat the sensor gently to
prevent damaging it.
3. Close the protection cover before storing
the meter.
Temperature sensor adjustment
Temperature sensor adjustment is available on
LAQUAtwin-EC-22 and LAQUAtwin-EC-33.
To perform accurate measurement with correc-
tion for temperature effects, follow the steps
below. Normally this is not necessary.
1. Ready a reference thermometer, and allow
the meter and reference thermometer to
reach to room temperature.
2. Set the display mode to temperature refer-
ring to " Measurement display change"
(page 2).
3. Press the CAL switch.
The meter displays the setting screen for tar-
get temperature.
4. Press the MEAS switch to adjust the dis-
played temperature on the meter to match
the temperature indicated by the reference
thermometer.
Pressing the MEAS switch increases the dis-
played temperature. After the displayed tem-
perature reaches 40°C, it returns to 5°C.
5. Press the CAL switch again to apply the
displayed value to the adjustment.
The adjustment starts. The adjusted value
blinks with and displayed.
After the adjustment is complete, the adjusted
value stops blinking with MEAS and dis-
played.
If Er4 (error display) appears, the adjustment
has failed. Retry the above steps increasing
the time spent on the step 1.
If the adjustment repeatedly fails, the sensor
may have deteriorated. Replace the sensor
with new one.
Initializing calibration data
Initialize calibration in the following cases.
To delete the calibration data
If the number of points for the last calibration is
uncertain.
After the sensor is replaced.
1. Press and hold the CAL and ON/OFF
switches for over 3 seconds when the
meter is switched OFF to Initialize calibra-
tion.
After a moment of all segment indication, the
software version is displayed.
And then, the display
changes as shown right.
2. Press the CAL switch.
All calibration data is reset.
When the initialization of cali-
bration data is complete, End
appears.
The meter automatically switches OFF.
Initializing the settings
All setup choices are erased. The meter is reset
to the factory default values.
1. Press and hold the MEAS, CAL and ON/OFF
switches for over 3 seconds when the
meter is switched OFF to enter the initial-
ization.
After a moment of all segment indication, the
software version is displayed.
And then, the display
changes as shown right.
2. Press the CAL switch.
All calibration data is reset.
When the initialization of set-
tings is complete, End
appears.
The meter automatically switches OFF.
Question Answer
How can I
check the
sensor's con-
dition?
Perform 2-point calibration. If cali-
bration error occurs, the sensor has
deteriorated. Replace the sensor.
Can I mea-
sure high or
low tempera-
ture sam-
ples?
This meter cannot measure a sam-
ple with temperatures outside the
meter's operating temperature range
(5C to 40C).
The difference between the sample
temperature and ambient tempera-
ture increases the measurement
error. Perform measurement after
the sample reaches the ambient
temperature.
The mea-
sured value
does not
change after
changing the
sample.
If lights steadily in AH mode, the
measured value is locked.
Press the MEAS switch to unlock the
value.
If the value does not change after
unlocking, the sensor may be dam-
aged. Replace the sensor.
“Or” or “Ur”
blinks in
value mea-
surement.
The measured value may be out of
the specified measurement range.
Measure a standard solution to
check, and if “Or” or “Ur” still blinks,
replace the sensor.
blinks
during mea-
surement.
The measured temperature is not
within the specified operating tem-
perature (5C to 40C).
If the ambient temperature is within
the specified range and blinks,
replace the sensor.
The meter
does not
power ON.
Check that the batteries are inserted
properly. If the battery voltage is low,
replace them both with new ones at
the same time.
Er4 is dis-
played during
the calibra-
tion
Please note that if you press the
CAL switch in mV or temperature
display mode, Er4 is displayed. This
is because there is no calibration
facility available for these modes.
Er1 is dis-
played soon
power ON.
The internal IC in the meter may be
defective. Perform meter initializa-
tion.
If Er1 is still displayed after the initial-
ization, the internal IC in the meter is
defective. Replace the meter with a
new one (the meter cannot be
repaired).
Er2 is dis-
played right
after power
ON.
The internal IC in the meter is defec-
tive. Replace the meter with a new
one (the meter cannot be repaired).
Er3 is dis-
played right
after power
ON.
The internal IC in the meter is defec-
tive. Replace the meter with a new
one (the meter cannot be repaired).
Question Answer

LAQUAtwin series (EC) Operation 4CODE: GZ0000472457
Setup Mode
The setup mode allows the user to customize the meter to his specific needs.
To enter the setup mode, press and hold the MEAS and ON/OFF switches for over 3 seconds when the
meter is switched OFF. All the LCD segments appear and then the meter enters the setup mode.
Tip
To have the changes apply, you need to go through the entire steps from “Setup mode entry” to
“Setup completion” shown below. To leave a setting as it is, just press CAL switch in the setting.
To exit the setup mode with no change of settings, press the ON/OFF switch earlier than pressing
CAL switch in the last step but one, or the “Backlight setting” step.
Setup mode entry
Unit setting
The display units can be changed.
TDS method setting (Only LAQUAtwin-EC-33)
The TDS method can be selected from the following options only on LAQUAtwin-EC-33.
FACt: KCl with factor adjustable from 0.4 to 1.0 (default 0.5)
442: Myron L 442 non-linear standard curve
En: European environmental standard non-linear curve
NACL: Non linear salinity curve
This step is bypassed on LAQUAtwin-EC-11 and LAQUAtwin-EC-22.
All segment
indication (2 s)
Software ver.
indication (1 s)
ON/OFF switch
MEAS switch
CAL switch
S/cm (default) S/m
Custom factor
(default)
442 standard EN 27888 TDS (NaCl)
Factor setting (Only LAQUAtwin-EC-33 with the TDS method set to FACt)
This step is bypassed on LAQUAtwin-EC-11 and LAQUAtwin-EC-22, and when the TDS method is set to
442, En, or NACL on LAQUAtwin-EC-33. * The setting range is from F0.4 to F1.0.
In this setting, pressing the MEAS switch
increases the displayed value. After the dis-
played value reaches F1.0, it returns to
F0.4.
Measurement mode change
The measurement mode can be switched. Note
The AH (auto hold) mode is applied only to
conductivity measurement.
* Measurement display change is available in
the AS mode. Refer to " Measurement
display change" (page 2).
Backlight setting
The backlight can be switched to ON or OFF.
Setup completion
F0.5 (default)
*
AS mode* (default) AH mode
Backlight ON
(default)
Backlight OFF
END indication (1 s) Powered OFF
For any questions regarding this product, please contact
your local agency, or inquire from the following website.
http://global.horiba.com/contact_e/index.htm
31, Miyanonishi-cho, Kisshoin Minami-ku, Kyoto,
601-8306, Japan
http://www.horiba-adt.jp