Description
A pH meter is an electronic device used for measuring the pH which is either the concentration of Hydrogen ions in an aqueous solution or the activity of the Hydrogen ions in an aqueous solution. The pH will indicate if the solution is acidic or basic, but is not a measure of acidity or alkalinity. pH meters work in liquids though special probes are sometimes used to measure the pH of semi-solid substances. A pH meter consists of a special measuring probe (a glass electrode) connected to the body which measures and displays the pH reading.
- Data hold, Max & Min measurement function.
- Separated pH and temperature sensor probes pH meter: It is easy to carry.
- Low battery indication and 30-minute auto power-off: It can remind you and save power.
- LCD and Backlight: It is easy to read and accurately test.
- Apply in water sources, aquariums, hydroponics, spas, swimming pools, and other water systems.
- Electrode probe can be replaced – Replaceable BNC pH sensor probe.
Product Specification | ||
| Instrument Level: | Grade 0.01 | |
| PH Measuring range: | PH 0.00~14.00pH | |
| PH basic measurement error: | ± 0.05pH | |
| Instrument Repeatability： | ±0.03pH | |
| Solution temperature compensation range: | 0 ~ 60°C | |
| instrument repeatability | 0.03pH | |
| mV measuring range: | -1400mV±1400mV | |
| temperature range: | -10 ~ 60 ; 0.1°C | |
| Battery: | 9V Battery (not included) | |
| Display: | Large LCD segment-type display with backlight | |
| Working temperature: | 0 ~ 35°C | |
| Working humidity: | 0-80% R H (Non-Gel) | |
| Product Net Weight | 205g | |
| Product Size | 159*66*31mm | |
| Packing contents | 1. AS218 type electronic unit 1 pc; 2. Ph composite electrode: general purpose and field usage. 12.3mm dia. X 160mm.plastic body*1pcs 3. PH4.00, PH6.86, PH9.18 calibration power*2 bags each type(see picture) 4. electrode liquid storage bottle:*1pc 5. instruction manual and warranty card: one set each | |
Normal Condition of Use | ||
| (1) | the environment temperature (0 ~ 35) ; | |
| (2) | the relative humidity is not more than 80%; | |
| (3) | measured solution temperature: (5 ~ 60 ); | |
| (4) | power supply: 9V DC battery X 1pc (006P); | |
| (5) | no significant vibration; | |
| (6) | in addition to the earth’s magnetic field without external magnetic field interference. | |
Open the battery door located at the back of the instrument, and insert a new 9V battery into this compartment with the correct polarity. If you have replaced it with a new PHcompositeelectrode, please do the calibration before this unit to measured.
User’s Guide | |
| ① | Press the “MODE” key to go to three different calibration modes [CAL 1], [CAL 2], and [CAL 3]. |
| ② | according to the “mode” button instrument into the correction state, respectively into “C4.0” “C6.86” and “C9.18” three states cycle scintillation indicating symbol. |
③ | Correction steps are as follows: A: PH4.00 buffer solution calibration: Press the “MODE” key go to [CAL 1] icon shown and flashing, rinse the PH electrode with distilled water, immerse the electrode in the PH4.00 buffer solution, wait for the electrode to become stable, should find the value of mV don’t change and state at the same value, this time press [CAL ] key more than 3 seconds. until [4.00] flashing stopped and disappeared, so the PH4.00 calibration was completed. B: PH6.86 buffer solution calibration: Press the “MODE” key two times go to the [CAL 2] icon shown and flashing, rinse the PH electrode with distilled water, immerse the electrode in the PH6.86 buffer solution, and wait for the electrode to become stable, you should find the value of mV don’t change and state at the same value, this time press[CAL ] key more than 3 seconds. until [6.86] flashing stopped and disappeared, so the PH6.86 calibration completed C: PH9.18 buffer solution calibration: Press the “MODE” key three times go to the [CAL 3] icon shown and flashing, rinse the PH electrode with distilled water, immerse the electrode in the PH9.18 buffer solution, and wait for the electrode to become stable, you should find the value of mV don’t change and state at the same value, this time press[CAL ] key more than 3 seconds. until [9.18] flashing stopped and disappeared, so the PH9.18 calibration was completed. |
④ | normal measurement mode: The factory default mode is normal measuring mode if you press [ the power on/off ] button to turn it on. At this normal measure mode, the unit can measure the PH and environment temperature at the same time, just immerse the electrode into the solution that you want to measure the PH value mV measure mode: Press the ‘MODE” key four times to go to mV measure mode, which enables you to measure the ion-selective, ORP(oxidation-reduction potential), and other precise mV measurements. In that mode, the LCD screen shows mV and ambient temperature at the same time. |
| ⑤ | If the battery power indicator icon becomes empty, please replace a new 9V battery immediately, If the instrument will not be used for a long period, please take out the battery from the battery compartment to prevent any leakage of the battery from damaging the instrument. |
In the following circumstances, Instruments Must be corrected: | |
| ① | The solution temperature has a large difference from the calibrated temperature |
| ② | PH electrode took off from the liquid storage bottle too a long time. |
| ③ | Replaced with a new PH electrode |
| ④ | After measuring at high concentration acid (PH<2) or alkali (PH>12) solution |
| ⑤ | After measuring fluoride solution and acidity within PH<7 or concentrated organic solution |
| ⑥ | When calibrating, please make sure the buffer solution temperature must be 25°C± 2°C |
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