Thermo Scientific Star A222, Instruction Sheet

Page: 7 / 8

Orion Star A222 and Star A322 Portable Conductivity Meters
7
Nominal Cell Constant Entry
The nominal cell constant value is used during an automatic conductivity calibration and allows the meter to
determine which Thermo Scientific Orion conductivity standard is being used for the calibration.
1. In the measurement mode, press .
2. Press , , or to highlight COND Channel and press f3 (select) .
3. Press or to highlight Mode and Settings and press f3 (select) .
4. Press or to highlight Cell K and press f3 (select) .
5. Press f3 (select) to access the numeric entry screen and enter the nominal cell constant of the conductivity cell.
a. Press , , or to highlight a number or decimal point, press f3 (enter) to
select the highlighted item and repeat until the nominal cell constant value is shown.
b. Press f2 (done) to exit the numeric entry screen.
6. Press f1 (back) and then press to return to the measurement mode.
Reference Temperature Selection
The reference temperature is the temperature that all conductivity measurements will be reported at by the meter
if temperature compensation is enabled.
1. In the measurement mode, press .
2. Press , , or to highlight COND Channel and press f3 (select) .
3. Press or to highlight Mode and Settings and press f3 (select) .
4. Press or to highlight Ref Temp. and press f3 (select) .
5. Press or to highlight 5 °C
(Star A322 meter only)
, 10 °C
(Star A322 meter only)
, 15 °C, 20 °C or 25 °C
and press f3 (select) .
6. Press to return to the measurement mode.
Temperature Compensation Selection
The temperature compensation can be turned off or set to Linear, nLFn (non-linear ultra pure non-degassed
water), nLFu (non-linear ultra pure degassed water) or EP (temperature compensation off and warning is displayed
if conductivity values are outside EP requirements for ultra pure water) and is used to report all conductivity
measurements at the selected reference temperature.
1. In the measurement mode, press .
2. Press , , or to highlight COND Channel and press f3 (select) .
3. Press or to highlight Mode and Settings and press f3 (select) .
4. Press or to highlight Temp. Comp . and press f3 (select) .
5. Press or to highlight Off, Linear, nLFn, nLFu
(Star A322 meter only)
or EP
(Star A322 meter only)
and press f3 (select) .
6. Press to return to the measurement mode.