Chapter 5
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Using the Conductivity Channel
Conductivity Meter Verification Procedure
Use the Orion Star series conductivity meter verification kit, Catalog Number 1010001, to verify
the accuracy of the conductivity measurements on Orion Star A212 conductivity meters and
Orion Star A215 pH/conductivity meters. The measured conductivity value of each resistor
should fall within the relative accuracy of the resistor (±0.1% of the actual resistor conductance)
plus the relative accuracy of the meter (±0.5% of reading ±1 digit for readings greater than 3
μS/cm or ±0.5% of reading ±0.01μS/cm for readings less than or equal to 3 μS/cm).
1.
Ensure that the conductivity resistor kit is certified and has a valid calibration date.
2.
In the measurement mode, press the f1 (cal) key.
a.
If more than one channel is displayed in the measurement mode, press the
p
or
q
key to highlight Conductivity-Channel and press the f2 (select) key.
3.
Press the f2 (cell K) key.
4.
Press the f3 (edit) key to access the popup number entry screen and enter a cell constant
value of 1.0000.
a.
Press the
p
,
q
,
t
or
u
key to highlight a number or decimal point, press the f3
(enter) key to select the highlighted item and repeat until the desired value is shown at
the top of the screen.
b.
Press the f2 (done) key to save the value and exit the number entry screen.
c.
Press the f2 (accept) key to accept the entered cell constant value.
5.
The meter will automatically proceed to the measurement mode and Cell Constant: 1.0000
will be shown on the display.
6.
Connect a resistor to the meter, press the measure (esc) key to start the measurement,
wait for the measurement value to stabilize and then record the displayed conductivity value
of the resistor.
7.
Repeat step 6 for all six resistors in the kit.
Resistor Number Nominal Resistance Nominal Conductance Nominal Acceptance Range
1010001-A
1000 KΩ
1 μS
0.984 to 1.016 μS
1010001-B
100 KΩ
10 μS
9.930 to 10.07 μS
1010001-C
10 KΩ
100 μS
99.30 to 100.7 μS
1010001-D
1 KΩ
1000 μS
993.0 to 1007 μS
1010001-E
100 Ω
10 mS
9.930 to 10.07 mS
1010001-F
10 Ω
100 mS
99.30 to 100.7 mS
Note: These are the nominal values for the resistors only. The actual resistance and
conductance is printed on each resistor and the actual acceptance range must be calculated
from the actual value on each resistor.
62
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Orion Star A210 Series Benchtop Meter User Manual
Thermo Scientific
Summary of Contents for Orion Star A210 Series
Page 5: ......
