Chapter 5
Conductivity Measurement Module
Thermo Scientific
Orion Versa Star Pro Meter User Manual
83
Conductivity Verification Procedure
Use the Orion Star series conductivity verification kit, Catalog Number 1010001, to verify the
accuracy of the conductivity measurements on the Versa Star Pro meter with conductivity
module. The conductivity value for each resistor should fall within the relative accuracy of the
resistor (±0.1 % of the actual conductance of the resistor) plus the relative accuracy of the
meter
(±0.5 % of reading ±1 digit for conductivity readings greater than 3 μS/cm and ±0.5 % of
reading ±0.01μS/cm for conductivity readings less than or equal to 3 μS/cm).
1.
Ensure that the conductivity resistor kit is certified and calibration date valid.
2.
Press the f1 (Cal) key to start the calibration.
a.
If more than one channel is displayed in the measurement mode, press the
or
key to highlight the desired channel and press the f3 (Select) key.
3.
Press the f2 (Cell K) key, wait for the cell constant value on the meter to stabilize and
press the f3 (Clear) key. Use the numeric keypad to enter the cell constant value as
“1.000” and press the f2 (Accept) key to confirm the entered value.
4.
Press the measure (esc) key to proceed to the measurement mode.
5.
Connect a resistor to the meter, press the measure (esc) key, wait for the measurement
value to stabilize and record the conductivity value of the resistor. Repeat the procedure 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.
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