Chongqing pH meter, pH meter calibration, 星枫 instrument acidity provided by 星枫 instruments. Nanchang 星枫 Instrument Co., Ltd. (www.xingfengyiqi.com) have been "Business League certification", please rest assured purchase through the entire network, click on the page check "Business League certification icons" of our authentication information. You can also click on the "Business Alliance Service Icons" on this page directly contact our customer service! DW-1 pen-oxidation-reduction potential (ORP) Total Operating Instructions: * Remove the electrode protective cover, press the POWER button (red), potentiometer LCD should display; * The first part of the potentiometer electrode immersed in the solution pH meter factory outlets , careful not to touch the bottom of the beaker solution; * slow agitation to the electrode readings stable, read the value; * testing is completed, clean the electrodes with water to remove contamination; dry with filter paper, the next sample can be detected; * pH meter electrode when not Press the POWER button off, and put the electrode protective sleeve. * Automatic shutdown after pH meter calibration, adjustment shall be secondary POWER button boot; Note: * To ensure the accuracy of the measurement, after one week, with a cotton ball to wipe or rinse solution platinum foil; * found potentiometer LCD display the need to replace the battery when the brightness dims; Technical Specifications: * Measuring range: ± 999mV * Resolution: 1mV * Accuracy: ± 10mV (20 ℃) ??* Ambient temperature: 0 ~ 45 ℃ * Power: 2 × 3V button battery continuous work time:> 150 (h) * Auto shutdown time: 10min * Dimensions: 147 × 28 × 15 (mm) * Weight: 0.05kg pH211 / pH213 desktop * pH211 and pH213 pH meter can measure pH, temperature, ionic concentration ( ISE) and oxidation-reduction potential (ORP). * Microcomputer processor, high accuracy and good reproducibility. * Automatic calibration, automatic temperature compensation, simple operation. * Large LCD, cantilevered electrode holder, application software enables the instrument easy to use. pH211 / pH213 desktop pH meter Technical Specifications Model pH211 pH213 measuring range 0.00 to 14.00pH; ± 399.9mV (ISE); ± 1999mV (ORP); 0 to 100.0 ℃ -2.00 to 16.00pH; -2.000 to 16.000pH; ± 999.9mV (ISE & ORP); 0 to 100.0 ℃ Resolution 0.01pH; 0.1 ℃; 0.1mV (ISE); 0.1mV (ORP) 0.01 / 0.001pH; 0.1 ℃; 0.1mV (ISE & ORP) Accuracy ± 0.01pH; ± 0.2mV (ISE ); ± 1 (ORP); ± 0.5 ℃ ± 0.01pH; ± 0.002pH; ± 0.05% FS (ISE & ORP); ± 0.5 ℃ calibration EMC Deviation ± 0.03pH; ± 2mV; ± 0.3 ℃ ± 0.01pH; ± 0.6mV ; ± 0.5 ℃ Automatic calibration point or two-point calibration (pH4.01,6.86,7.01,9.18,10.01) temperature compensation 0 to 100 ℃ Automatic Temperature Compensation