Conductivity Verification Procedure - Thermo Scientific Orion Versa Star Pro User Manual

Thermo Scientific

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
1010001-A 1000 KΩ
1010001-B
1010001-C
1010001-D
1010001-E
1010001-F
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.
Nominal Conductance
1 μS
100 KΩ 10 μS
10 KΩ 100 μS
1 KΩ 1000 μS
100 Ω 10 mS
10 Ω 100 mS
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Chapter 5 Conductivity Measurement Module
Nominal Acceptance Range
0.984 to 1.016 μS
9.930 to 10.07 μS
99.30 to 100.7 μS
993.0 to 1007 μS
9.930 to 10.07 mS
99.30 to 100.7 mS
Orion Versa Star Pro Meter User Manual
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