Nova-Tech pH-CON 300 - Manual (Page 10)

19 18
To take readings:
1. Rinse the probe with deionized 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 conduc-
tivity (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.
See figure
NOTE: For conductivity manual tempera-
ture compensation, you must deactivate the
temperature sensor built into the conduc-
tivity probe and set a manual temperature
compensation value. See pages 21-22 for
directions. The ATC indicator will disap-
pear from the display.
4. Dip the probe into the sample.
When dipping the probe into the sample,
the tip of the probe must be immersed
above the second steel band. Stir the
probe gently in the sample to create a
homogenous sample.
See figure
5. Allow time for the reading to stabilize.
Note the reading on the display. If the
Ready indicator is selected on, it will
appear when the reading is stable. See
page 20 for more information.
6. Press the MODE key to toggle between
conductivity and pH readings.
Taking Conductivity or TDS Measurements
ATC
READY
MEAS
C
µS
A
A
5.2
B
B
Immerse
probe beyond
upper steel
band
Notes
You can use the conductivity/TDS manual ranging function to select a specific range
in which your readings will appear. See page 20 for directions.
HOLD function
This feature lets you freeze your reading for
a delayed observation. HOLD can be used
any time when in MEAS mode.
1. To hold a measurement, press the
HOLD key while in measurement
mode. "HOLD" will appear on
the display.
See figure
2. To release the held value, press HOLD
again. Continue to take measurements.
NOTE: This meter shuts off automatically
after 20 minutes of nonuse. If the meter is
shut off either automatically or manually,
the HOLD value will be lost.
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 Set up program
P7.1—see page 34 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 Set up program P7.1—see page 34 for directions.
ATC
READY
MEAS
HOLD
F
µS
C
C
5.3
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