1 ph observed with honeywell ph electrodes current plan for calibration and cleaning gel replacement...
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1
• pH observed with Honeywell pH electrodes
• Current Plan for Calibration and Cleaning
• Gel replacement• Checking with
Buffers
pH: SATURN-03; SATURN-04
2pH vs Temperature; SATURN-03
0.0 5.0 10.0 15.0 20.0 25.04.50
5.25
6.00
6.75
7.50
8.25
BC pH 7.00 buffer AC pH 7.00 bufferpH 7.00 buffer - temp line
pH in 7.00 Buffer BC and AC vs Temper-ature
0.0 5.0 10.0 15.0 20.0 25.08.50
8.70
8.90
9.10
9.30
9.50
9.70
9.90
10.10
10.30
10.50
BC pH buffer 10.00 AC pH buffer 10.00pH buffer 10.00 - temp line
• BC = before cleaning• AC = after cleaning• Calibration Analysis eleven times from 20120917 - 20130104
3Percent Drift SATURN-03
7 18 25 36 55 63 69 76 83 108
-20.00
-10.00
0.00
10.00
20.00
30.00
40.00
50.00
60.00
70.00
80.00
pH 7.00 % drift pH 10.00 % drift
days
SATURN-03 pH Percent Drift: 20120917 - 20130104
4pH vs Temperature; SATURN-04
0 2 4 6 8 10 12 14 16 18 206.94
6.96
6.98
7.00
7.02
7.04
7.06
7.08
7.10
7.12
BC pH 7.00 buffer AC pH 7.00 buffer
pH 7.00 buffer - temp line
pH 7.00 Buffer BC and AC vs Temperature
0 2 4 6 8 10 12 14 16 18 209.9
9.95
10
10.05
10.1
10.15
10.2
10.25
10.3
10.35
BC pH buffer 10.00 AC pH buffer 10.00
pH 10.00 buffer - temp line
pH 10.00 Buffer BC and AC vs Temperature
• BC = before cleaning• AC = after cleaning• Calibration Analysis six times from 21021002 – 20130107
5Percent Drift; SATURN-04
0 10 20 30 40 50 60 70 80 90 100
-8
-6
-4
-2
0
2
4
6
8
pH 7.00 % drift pH 10.00 % drift
SATURN-04 pH Percent Drift
days
6Current Calibration Plan (including gel replacement)• Calibrate once monthly, record pH before and after cleaning and track adjustments made• Check in buffers at least once weekly before and after cleaning• Track data and look for trends and when to replace gel
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