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PDF Content Summary: *1 0.05 mL or more if sampling sheet B (sold sepa Items Specifications Part No. Detaching the sensor
Instruction Manual (Operation) rately) is used. *2 The closeness of agreement between measured value and actual value of the pH 4.01 standard Sampling sheet B Y046, 100 sheet-pack 3200053858 1. Power OFF the meter. 2. Lift the sensor tongue tip and slide the sensor
COMPACT WATER QUALITY METER LAQUAtwin-pH-11, LAQUAtwin-pH-22, LAQUAtwin-pH-33 Specifications Model LAQUAtwin-pH-11, LAQUAtwin-pH 22, LAQUAtwin-pH-33 Target pH solution after two-point calibration using pH 4.01 and pH 7.00 standard solutions. The temperature during the calibration and measurement is the same. Two-point calibration is started from pH 7.00. The error of standard solutions and round ing error (±1 digit) are not included. *3 The life period if the meter is used in the backlight off mode. If the backlight is used, battery life will shorten. *4 The dimensions excludes projections and the Part Names 2 1 4 6 7 10 8 1 Flat sensor 2 Light shield cover 3 Liquid junction 4 Glass membrane 5 Lithium batteries 6 MEAS switch a little away from the meter. 3. Pull out the sensor all the way from the meter. Inserting/removing batteries Inserting the batteries 1. Power OFF the meter. 2. Slide both batteries into
Measurement principle Glass electrode method Minimum sample volume 0.1 mL*1 pH range 0 pH to 14 pH 3 mass excludes batteries. 5 *5 IP67: no failure when immersed in water at a depth or 1 meter for 30 minutes. 9 Please note that the meter can not be used underwater 7 ON/OFF switch 8 CAL switch 9 Waterproof gasket 10 Strap eyelet the battery case as shown. Be sure to use two CR2032 batteries, and put them with the plus sides Battery Battery clip
Resolution (valid digits) LAQUAtwin-pH-11: 0.1 pH LAQUAtwin-pH-22: 0.01 pH LAQUAtwin-pH-33: 0.01 pH Items in package Items Quantity Note Press the switches 0.5 seconds or more unless otherwise specified. (+) upwards. Removing the batteries 1. Power OFF the meter.
Calibration LAQUAtwin-pH-11: Up to 2 points LAQUAtwin-pH-22: Up to 3 points LAQUAtwin-pH-33: Up to 5 points Accuracy*2 LAQUAtwin-pH-11: ±0.1 pH LAQUAtwin-pH-22: ±0.01 pH LAQUAtwin-pH-33: ±0.01 pH Sensor S010 1 Meter 1 Storage case 1 Batteries CR2032 2 Standard solution pH 4 (pH 4.01) 1 Initial Setup Attaching/detaching the sensor Attaching the sensor 2. Use a ball-point pen or other tool to pry the batter ies out from the clips as shown. Electrode conditioning Note
Tempera ture display Available only on LAQUAtwin-pH-33, 0 °C to 50.0°C pH 7 (pH 7.00) 1 Pipette 1 1. Power OFF the meter. 2. Confirm that the waterproofing gasket is ● Before using the sensor for the first time or Display Custom (monochrome) digital LCD with backlight Instruction manual (Operation) 1 clean and undamaged. 3. Slide the sensor Waterproof after several days of disuse, perform electrode conditioning.
Operating environment 5°C to 40°C, 85% or less relative humidity (no condensation) Instruction manual (Before use) 1 Consumable parts sold separately onto the meter so that catch "A" on the gasket ● Perform calibration after electrode condition ing.
Power CR2032 batteries (×2) Battery life Approx. 400 h continuous operation*3 Outer dimen Items Specifications Part No. Sensor S010, pH 3200459834 back of the meter fits into hole "a" on the sensor tongue as shown. a A 1. Place some drops of pH 7 standard solution to the flat sensor. 2. Wait a few hours before use. sions/mass164 × 29 × 20 mm, Approx. 50 g*4 Standard 514-4, pH 4.01 3999960108 Note There is no need to switch the meter ON.
Main func tion Temperature compensation, water proof*5, auto stable/auto hold, auto matic power OFF solution 514-7, pH 7.00 3999960109 Be careful not to twist the waterproof gasket. 3. Clean the flat sensor with running water. CODE: GZ0000472467A
LAQUAtwin series (pH) Operation 1 August, 2017 2017 HORIBA Advanced Techno Co., Ltd.
Basic Operation 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. 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. ● Select the pH standard solutions close to the pH value of sample when the sample is known. ● Perform three-point calibration using pH 4.01, pH 7.00 (6.86), and pH 10.01 (9.18) standard solutions when the sample is unknown. Calibration points The number of calibration points is dependent on the meter model. ● LAQUAtwin-pH-11: Up to two-point calibration ● LAQUAtwin-pH-22: Up to three-point calibration ● LAQUAtwin-pH-33: Up to five-point calibration Multi-point calibration 1. Select the standard from USA or NIST. (Refer to " Buffer standard change" (page 4).) USA is selected by the default. 2. Open the light shield cover and place some drops of the standard solution on the flat sensor taking care to cover the entire flat sensor. Rinsing the sensor with the standard solution beforehand will provide a more accurate cali bration as it will reduce sample crossover con tamination. 3. Close the light shield cover and press the CAL switch. and blink, and the measured value is displayed. Light shield cover After the calibration is complete, and stop blinking and the calibration value is dis played. The calibration value at 25°C is displayed for 1 s and the display returns to the measurement mode automatically. 4. Open the light shield 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. 5. To perform 2nd point calibration, repeat steps 2. to 4. 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. Measurement Sample setting 1. Open the light shield cover and put some drops of sample on the flat sensor to cover the entire flat sensor. 2. Close the light shield 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. 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. ● When you have a problem with the calibration or measurement, refer to frequently asked questions. Measurement display change The display mode switches as follows by press ing the MEAS switch in the AS mode. LAQUAtwin-pH-11 and LAQUAtwin-pH-22: Between pH and voltage alternately LAQUAtwin-pH-33: Among pH, voltage, and temperature Maintenance 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 flat sensor gently to prevent damaging it. 3. Close the light shield cover and the slide cap before storing the meter.
LAQUAtwin series (pH) Operation 2 CODE: GZ0000472467A
Temperature sensor adjustment Temperature sensor adjustment is available on 1. Press and hold the CAL and ON/OFF switches for over 3 seconds when the Appendix Frequently asked questions Question Answer
LAQUAtwin-pH-33. To perform accurate measurement with correc tion for temperature effects, follow the steps meter is switched OFF to Initialize calibra tion. After a moment of all segment indication, the Question Answer Er4 is dis played during the calibra Please note that if you press the CAL switch in mV or temperature display mode, Er4 is displayed. This
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. 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 setup data is reset. When the initialization of settings is complete, End appears. The meter automatically switches OFF. How can I check the sensor's con dition? Can I mea sure high or low tempera ture sam ples? The mea sured value does not change after changing the sample. “Or” or “Ur” blinks in value mea surement. blinks during mea surement. The meter does not power ON. Perform 2-point calibration. If cali bration error occurs, the sensor has deteriorated. Replace the sensor. 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. 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. 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. 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. Check that the batteries are inserted properly. If the battery voltage is low, replace them both with new ones at the same time. tion Er1 is dis played soon power ON. Er2 is dis played right after power ON. Er3 is dis played right after power ON. is because there is no calibration facility available for these modes. 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). The internal IC in the meter is defec tive. Replace the meter with a new one (the meter cannot be repaired). The internal IC in the meter is defec tive. Replace the meter with a new one (the meter cannot be repaired).
LAQUAtwin series (pH) Operation 3 CODE: GZ0000472467A
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 applied, you just need to press CAL switch at the each setting. ● To exit the setup mode with no change of settings, press the ON/OFF switch before pressing CAL switch. Setup mode entry ON/OFF switch MEAS switch Setup completion END indication (1 s) Powered OFF
Buffer standard change All segment indication (2 s) Software ver. indication (1 s) CAL switch
The standards of pH buffer can be changed.
USA buffer (default) Measurement mode change NIST buffer
The measurement mode can be switched. * Measurement display change is available in the AS mode. Refer to " Measurement
AS mode* (default) AH mode Backlight setting The backlight can be switched to ON or OFF. display change" (page 2).
Backlight ON (default) Backlight OFF 31, Miyanonishi-cho, Kisshoin Minami-ku, Kyoto, 601-8306, Japan horiba-adt.jp For any questions regarding this product, please contact your local agency, or inquire from the following website. global.horiba.com/contact_e/index.htm
LAQUAtwin series (pH) Operation 4 CODE: GZ0000472467A
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