Product Help

General Tester & Meter Problem

What is the warranty period for Trans Instruments products?
  • Depending on your area and country, the warranty period may vary. If it is not specified, all our products have a warranty of 1 year from the date of purchase and for any pH electrodes 3 months from the date of purchase. Original invoice/sales receipt must be evidence as proof of purchase.
  • Warranty covers original manufacturing defects and out-of-the-box malfunctions. The warranty does not cover out-of-calibration, worn-out batteries, accidental damage, misuse, abuse, sensor expiry due to intensive/extensive usage, poor maintenance, damage due to poor storage condition and modification.
I lost the operations manual for my meter, where can I find a replacement?
  • You can download the operations manual from this website.
  • Click on the 'Product' tab, then select the product from its category ('Product by Analyte' or 'Product by Series'). At the end of the product page, click on "download Instruction Manual" to download the manual.
Why is the display only " - - - "?
  • Measurement in the sample is above the measuring range. Make sure the sample is within the measuring range.
  • Temperature of sample is above the measuring range. Make sure the test sample is within the range of 0 to 50ºC.
  • Meter is out of calibration or calibrated with the wrong standard solution. Re-calibrate meter only with specified standards.
  • Sensor or circuit shorted due to water ingression. Water damage has no warranty.
  • Meter is subject to extreme heat or above 70ºC. The circuit may be damaged by heat and cannot be repaired. Out of warranty.
Why is the LCD display digit broken or incomplete?
  • LCD damaged: The LCD display is damaged due to extreme shock or impact. Damages due to misuse is not covered under warranty.
  • If the damage is found out of a newly opened packaging box or used less than a year, then it is covered under product warranty.
Why the display freezes and unit cannot switch off?
  • Software Hang: Remove batteries for 1 minute, replace and retest. If hanging persists, return for a replacement.
I just changed with new batteries and the meter is still dead?
  • Check if the battery's polarity is correctly placed according to the operations manual. If you lost the manual, you can download it from the product page of your model, at the end of the page.
  • Check if you change all the batteries with new ones, this is because you won't know which battery is worn out first. Even though they may have been changed later. Always make it a practice to change all batteries with new ones.
  • Check if the old batteries are leaking and if the contact were corroded or leakage onto the circuit board. If so, the meter is damaged. Depending on the extent of the damage, in most cases, they cannot be repaired.
Why is the display become very faint or no display at all?
  • Worn out battery or battery placed incorrectly. Change all batteries and ensure batteries are placed in correct polarity.
  • All pocket tester battery placement has the "+" polarity on the right side of the battery holder with the clip pointing downward.
Why does the battery drain quickly within 1 month?
  • Battery placed in the wrong polarity. Ensure all batteries are placed correctly.
  • For pocket tester, polarity "+" is placed on the right side of the battery holder with the clip pointing downward.
  • If batteries are placed wrongly for long period will damage the circuit which is out of warranty.
  • Battery leakage causes an internal short circuit. No remedy & out of warranty.
  • Water leaked into the circuit board due to submersion under water or improper battery cap closure. No remedy & out of warranty.

All pH related Meter - Senz/ECO pH/pH Pro/pH Duo/ Redox / ArowanaPro

Why is the pH reading either random or non-zero when switch on before dipping into the solution?
  • Sensor In Air - pH sensor need to contact with water in order to obtain a stable reading. When the sensor is in the air, it cannot make an electrical bridge between the glass sensor and the reference sensor, therefore, resulting in random or unstable reading. Once the sensor is in contact with liquid, a stable reading will appear.
Why is the pH reading inaccurate compared to another meter?
  • All pH meter needs to be re-calibrated regularly or as frequent as possible. If multiple measurements are made daily, then the meter should be calibrated daily. If a measurement is made once a day, then calibrate at least once a week. Do remember that even if the meter is not used and put in storage, the sensor will change due to heat and humidity. Therefore, it is advisable to re-calibrate the meter after prolong storage. Due to dryness of sensor after prolong storage, soak sensor in water for at least 15 minutes before performing calibration.
  • Each meter has its own accuracy. Deviation within the specifications is normal. For example, the pocket pH tester has an accuracy of +/-0.2pH, if the meter reading is at 7.5pH when compared to another meter in the same liquid, that other meter could read between 7.3 to 7.7 and is considered within specification.
  • Do take into consideration the temperature variation in the liquid when comparing data. Because all pH readings are affected by the liquid temperature. Therefore, it is logical to make measurements with any liquid at about the same temperature.
  • Maintenance must be observed to keep the sensor in good condition. Always rinse the sensor with water after taking a measurement and before storage. If a measurement is accidentally made in oil-tainted liquid, oil film may be deposited on the glass sensor as well as the reference sensor. Dip the sensor in warm mild liquid detergent for 1-2 minutes, then use a cotton bud and gently rub only the glass sensor. Rinse the sensor thoroughly with water. Re-calibrate and retest. If the sensors are badly soiled, it may permanently damage the sensor, resulting in inaccurate or very sluggish reading. This is not covered under the warranty.
Why is the pH reading sluggish or slow to obtain a stable reading? Or the auto-lock reading is repeatable only after several tests.
  • Dry sensor. The pH glass sensor requires a fully hydrated surface contact with the measuring liquid in order to obtain a stable reading. If the sensor is out of the box or had been kept in storage for a long time, soak the sensor in tap water for 10 to 15 minutes to regain the hydrated surface on the sensor. Measuring speed will be improved significantly.
  • Always re-calibrate the meter after prolonged storage and before measurement.
  • If the reading is still sluggish after soaking in water, then the sensor could be expired. Extensive and intensive testing will significantly reduce sensor life and cause premature expiry. The lifespan of the pH sensor is about 365 tests or about 1 year, whichever is earlier. Sensor expiry is not covered under the product warranty.
Why is the pH reading unstable or erratic when dipped in a liquid?
  • Magnetic interference from high power stations or equipment. The pH sensor measures minute electrical signals at the molecular level, therefore, it is a very sensitive instrument and can pick up strong electromagnetic signals. Try moving to another location to perform the test.
  • Water damage: Water leaked into the electronics of the unit due to submersion under water or improper battery cap closure. Water damage is not covered under warranty.
  • Sensor damaged: Sensor could be damaged or broken. Observe the pH glass sensor to look for any cracks or micro-cracks. If the product had been subject to extreme shock or impact, it can be damaged. Damage due to misuse is not covered under warranty. If the damage is found in a newly opened packaging box, then it is covered under the product warranty.
  • Sensor Expiry: Intensive testing will significantly reduce sensor life and cause premature expiry. Storing the sensor without its protective cover or soaking bottle will result in premature expiry. Continuously soaking the sensor in water for days or weeks will cause premature expiry. The lifespan of the pH sensor is about 365 tests or about 1 year, whichever is earlier. Sensor expiry is not covered under the product warranty.
Why does the pH reading stays around 7.0 in liquid of higher or lower pH value?
  • Sensor damaged: Sensor could be damaged or broken. Observe the pH glass sensor to look for any cracks or micro-cracks. Even a very tiny crack will ruin the sensor. If the sensor is subject to extreme shock or impact, it is not covered under warranty.
  • If the damage is found out of a newly opened packaging box, then it is covered under the product warranty.

All EC/Conductivity related meter - Senz uSiemen/mSiemen/TDS / KoiMedic / DiscuSoft / Nutrient Check / CrystalShrimpPro

Why are readings unstable during measurement?
  • Measurement in moving water may result in unstable reading. As Conductivity readings are temperature dependent, making measurements in moving water of varying temperatures will result in instability.
Why are the readings inaccurate after a few months?
  • If the sensors are not rinsed after each test and not rinsed before storage, residues and oily deposits on the sensor will result in inaccurate readings (lower-ranged readings). Rinse the sensors in warm dilute dishwashing liquid and soak for 5 minutes. Rinse thoroughly with water and re-test. Calibrate the unit with the recommended calibration fluid.
  • If oily deposits are on the sensors, rinse the sensors in Alcohol for 20 seconds. Rinse with water then perform a calibration using the recommended calibration fluid.
  • Calibration is recommended every 6 months.
Why are the Conductivity or TDS readings either random or non-zero when switch on before dipping into the solution?
  • Magnetic interference from high power station or equipment or power line. The Conductivity meter measures minute electrical signals and can pick up strong electromagnetic signals. Try moving to another location to perform the test.
  • It could be due to dirt staying between the sensor. Check if there is any dirt, hair or even a layer of wet film between the sensors will cause.
  • It could be due to environmental differences between the place of manufacturing and the local environment. A software reset is necessary to zero the circuit as follows:

     

    1. Remove the battery cap.

    2. Press and hold down the MODE or CAL button and simultaneously insert the battery cap, then release the button.

    3. "C00" will appear in a flashing mode then stop.

    4. Reset completed and display return to zero.