ES-421 Calibration Certificate:ES-421 Salt Meter Calibration Certificate; multiple certificate documents including -Calibration Certificate -Calibration Test Result Certificate -NIST Traceability System Diagram -Supporting documentation documents

Digital Salt-Meter ES-421 Model: ES-421 Cat. No. 4211 Measurement Method: Conductivity method Measurement Range: 0.0 to 10.0% (100g) of salt concentration Minimum indication: 0.01% for salt concentration of 0.00 to 2.99% 0.1% for salt concentration of 3.0 to 10.0% Measurement Accuracy: Displayed value +- 0.05% (for salt concentration of 0.00 to 1.00%) Relative precision +- less than 5% (for salt concentration of 1.00 to 10.0%) Temperature Compensation: 10 to 40 degrees C (automatic temperature compensation) Ambient Temperature: 10 to 40 degrees C Optional: 2.84% NaCl Solution AB284 : RE-120284 Power Supply: 006P Dry battery (9V) Dimensions & Weight: 17 x 9 x 4 cm, 300g (main unit)

PAL-Salt; Model 4250 -Measurement range; 0.00 to 10.0% (g/100g) of salt concentration 5.0 to 100°C -Resolution; 0.01% for salt concentration of 0.00 to 2.99% 0.1% for salt concentration of 3.0 to 10.0% 0.1°C -Measurement accuracy; Displayed value ±0.05% (for salt concentration of 0.00 to 0.99%) Relative precision ±5% (for salt concentration of 1.00 to 10.0%) ±1°C -Sample temperature; 5 to 100°C -Ambient temperature range; Ambient temperature range -Sample volume; At least 0.6ml -Measurement time; Approx. 3 seconds -Power supply; Two (2) AAA alkaline batteries -Battery life; Approx. 8,000 measurements (when using alkaline batteries) -International Protection class; IP65 -Dimensions and weight; 55(W)×31(D)×109(H)mm,100g (main unit only) 1. What can this instrument measure? Various types of food – soups, sauces, condiments, dressings, fish, deli meats, brine, dairy, crackers, chips, and more – can be measured. 2. How do I measure my food? Different types of food may require different preparation for measurement. Please refer to “Measurement Method.” 3. Can I use tap water for dilutions? Distilled water is the best, but tap water may be used. Tap water may affect the readings slightly (approx. 0.01%). Do not use mineral water or ion water as they will affect the readings. 4. How do I clean it? The entire body can be washed under running water. Use soap to remove persistent residues. Clean greasy residues with ethyl alcohol and rinse with water. 5. The readings are unstable. Try stirring the sample on the sensor while measuring. 6. Can it measure cold/hot food? Leave the sample on the sensor for 30 seconds before measurement. Alternatively, take multiple readings until the readings stabilize. 7. How often does it need to be calibrated? Zero-set the instrument at the beginning of each day. Clean the sensor thoroughly and press ZERO with nothing on it. For official calibration, please contact ATAGO. 8. The readings seem wrong. Apply water or ethyl alcohol on the sensor and wipe it off with tissue paper. Repeat the process a few times if using water. If this does not solve the problem, reference set with a 2.5% standard salt solution. 9. What is the storage instruction? Store in the box that the instrument originally came in.