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MONTHLY SAFETY INSPECTION - ---- ------------------ --_------------------ I ASH Probe Calibration. s Probes must be calibrated once per month to ensure proper operation. PH range should be 6.0-11.0 Supplies needed: 1. pH buffer solutions 4,7, &10. 2. Clean containers for each buffer solution. 3. DI Water bottle and Kim wipes. I 4. Temperature probe. I Procedure: 1 1) Fill containers with 150 ml of each buffer solution. Make sure at[containers are clean and free of any solution or contaminants. 12) Disconnect the pumps that dispense sodium hydroxide and sulfuric acid to prevent them from turning on while performing calibration. 13) Remove pH probe from tank and clean using a clean rag.Carefully rinse with DI water and use kimwipes to clean the tip of the probe. I 4) Place probe in pH buffer solution and measure the temperature of solution. Check the Neutralization Panel for the probe being calibrated and 1 follow the procedure below if you need to make any adjustments: 1 a) To enter the Adjustment menu,you must press ENTER and hold it for 5 seconds. I b) You will be prompted to enter a password to access the calibration menu. Enter(rm r )and scroll to the desired parameter that needs to be I I adjusted. c) After the desired values have been adjusted press ENTER to save changes. I 1 d) Press TI. at the same time to exit the Adjustment/Calibration menu. Ie) Repeat this process for all three pH buffer solutions making sure all probes are rinsed with DI water and dried before inserting in the next pH 1 buffer. 1 5) Repeat steps 2 and 3 for each tank and record the results before and after calibration. if any issues are encountered report to your supervisor. 16) reconnect the sodium hydroxide and sulfuric acid pumps. -- --� ---- ------- _ Before Calibration Notes I p_H_4_ Temp paH 7ennp°i=-�-_pH €0_ I Temp I------ I �TANK 3------�-4.32 �f � 61 ! 7.14 I 61.7 10.00 �- 61.6 1 - --- ----- -----� ----._._._._.__.-_.............-..-� TANK 4 4.05 I 61.7 I 7.06 i 61.7 I 9.94 I 61.8 1 I 1 TANK 5 3.73 i 60.9 I 7.05 I 60.0 I 9.90 ! 59.6 I I ._..._._---------- -------- ---� After Calibration Notes --- -�-pH4- 1 Tam p QP l P H 7 �Te m p OF I pH 10 j Temp I TANK 1 4.0 1 61.5 I 7.0 1 61.6 I 10 I 61.6 i I -I--- _.1.._._. --..}-----_ I � TANK4 ----I- 4.0 � 61.7 ( 7.0 1 61.5 I 10.0 I 61.7 1 ._...._..._...._.�.-. ._...-..._...._._.._..._..--_. ___-_�__ __--------------- -- ---__- I TANK 5 I 4.0 60.9 I 7.0 1 60.7 1 10.0 I 61.1 I I