Table of Contents
Advertisement
Chapter 5
Using the Conductivity Channel
|
46
Orion Star A220 Series Portable Meter User Manual
|
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 A222 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.
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
1010001-A
1000 KΩ
1010001-B
100 KΩ
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
10 μS
10 KΩ
100 μS
1 KΩ
1000 μS
100 Ω
10 mS
10 Ω
100 mS
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
Thermo Scientific
Advertisement
Table of Contents
