Thermo Fisher Scientific CyberScan PC 300 User Manual

Page 29

Instruction Manual PC 300

5.2.4

Taking Measurements (Conductivity or TDS)

To take readings:

1. Rinse the probe with de-ionized or distilled water

before use to remove any impurities adhering to the

probe body. Shake or air dry. To avoid contamination

or dilution of your sample, rinse probe with a small

volume of your sample liquid.

2. Press

ON to switch on meter.

3. Press

the

MODE key to select conductivity or TDS measurement mode. The MEAS

annunciator appears on the top center of the LCD. The ATC indicator appears in the

lower right hand corner to indicate Automatic Temperature Compensation.

•

NOTE: For conductivity manual temperature compensation, you must

de-activate the temperature sensor built into the conductivity probe and

set manual temperature compensation. See Section 5.2 for more

information. The ATC indicator will disappear from the display.

Dip the probe into the sample.

When dipping the probe into the sample, take care to ensure that the liquid

level is above its upper steel band. Stir the probe gently in the sample to

create a homogenous sample. See Figure 9 in Section 4.4.

Allow time for the reading to stabilize. Note the reading on the display. If the READY I

indicator is selected on, it will appear when the reading is stable. See P7.1 in Section 7.8

for more information.

6. Press

the

MODE key to toggle between conductivity, TDS and pH readings.

NOTES: You can use the conductivity manual ranging function to select a specific range in which

your readings will appear. See Section 5.2.5: Manual ranging for directions.

Taking measurements with READY indicator selected on

If the READY indicator has been activated, the READY annunciator lights when the reading is

stable*. Switch the READY indicator on or off in SETUP program P 7.1. See Section 7.8 for

directions.

Taking measurements with the auto endpoint feature selected on

When a reading is stable for more than 5 seconds, the auto endpoint feature will automatically

“HOLD” the reading. The “HOLD” indicator appears on the left side of the display. Press the

HOLD key to release the reading. Switch the Auto endpoint feature on or off in SETUP

program P 7.1, See Section 7.8 for directions.

Figure 20 - During measurement