PHscan20
12
Calibration Points
1 to 3 points
Calibration Solutions
USA (pH4.01, 7.00, 10.01)
NIST (pH4.01, 6.86, 9.18)
Temperature Compensation
o
o
0~60 C, 32~140 F, Automatic
Auto-Off
After 8 minutes from last key press
Operating Temperature
o
o
0~60 C, 32~140 F
LCD Display
Custom LCD
Power Requirement
2 1.5V “
×
AAA” Batteries
Weight
100 grams
Dimensions
185(L) 40(Dia.)mm
×
Model
PHscan20
pH Range
-1.00~15.00pH
Resolution
0.01pH
Accuracy
±0.01pH
11
PHscan20
Optional Electrode Modules
Specifications
Appendix 1: How to prepare electrode storage solution
1. Dissolve
223.6
grams
of
potassium
chloride
reagent
(KCL)
in
1
liter
distilled
water.
2. Pour the 50mL of KCL solution into beaker.
3. Pour the 50mL of pH4.01 standard buffer solution into the same beaker.
4.
Stir
the
solution
until
the
solution
has
thoroughly
mixed
,
preparation
is
done
.
ORDER CODE
ITEM
E-PHSCAN-ST
Standard pH Electrode
Used for routine pH measurements,
e.g. drinking water, rainwater, etc.
E-PHSCAN-FT
Flat Surface pH Electrode
Used for measuring the skin, fruits,
meats etc.
E-PHSCAN-LT
Long-Reach pH Electrode
Used for measuring the samples in
the test tube.
Appendix 2: Standard pH Buffers
The
following tables
shows the various pH values at different temperature of
the solution during the calibration.
NIST STANDARD:
USA STANDARD:
o
Temperature ( C)
0
5
10
15
20
25
30
35
40
45
50
55
60
pH4.01
4.01
4.01
4.01
4.00
4.00
4.01
4.01
4.02
4.03
4.04
4.06
4.08
4.10
pH6.86
6.98
6.95
6.92
6.90
6.87
6.86
6.85
6.84
6.84
6.83
6.83
6.83
6.84
pH9.18
9.46
9.40
9.33
9.28
9.23
9.18
9.14
9.11
9.07
9.04
9.01
8.99
8.96
o
Temperature ( C)
0
5
10
15
20
25
30
35
40
45
50
60
pH4.01
4.01
4.01
4.01
4.00
4.00
4.01
4.01
4.02
4.03
4.04
4.06
4.10
pH7.00
7.12
7.09
7.06
7.04
7.02
7.00
6.99
6.98
6.97
6.97
6.97
6.98
pH10.01
10.32
10.25
10.18
10.12
10.06
10.01
9.97
9.93
9.93
9.86
9.83
9.79
