Nova-Tech pH-CON 300 - Manual (Page 8)

15 14
Notes
When entering calibration mode, the meter will display the factory default value. If
the meter was previously calibrated, the display may “jump” to the factory default
value when switching from measurement to calibration mode.
To exit from Conductivity Calibration mode without confirming calibration, DO NOT
press ENTER in step 6. Press CAL/MEAS instead. This will retain the meter’s old calibra-
tion data in the measuring range of the calibration.
You can offset the conductivity reading up to ±20% from the default setting. If your
measured value differs by more than ±20%, clean or replace probe as needed. See
page 47 for a wide selection of high-quality calibration standards.
To calibrate conductivity:
1. If necessary, press the MODE key to
select conductivity mode.
See figure
2. Rinse the probe thoroughly with
de-ionized water or a rinse solution,
then rinse with a small amount of
calibration standard.
3. Dip the probe into the calibration
standard. Immerse the probe tip beyond
the upper steel band. Stir the probe gently
to create a homogeneous sample.
See figure
4. Wait for the measured conductivity
value to stabilize. If the READY indica-
tor has been activated (set up program
P7.1—see page 34), the READY annunci-
ator lights when the reading is stable.
5. Press CAL/MEAS to enter conductivity
calibration mode. The CAL indicator
will appear above the display.
See figure
6. Press the ▲ or ▼ to change the value on
the primary display to match the value of
the calibration standard.
See figure
7. Press ENTER to confirm the calibration
value. The meter returns to the MEAS
(measurement) mode.
8. Repeat steps 1-7 for other ranges.
CAL
ATC
READY
C
µS
C
ATC
READY
CAL
C
µS
D
D
ATC
READY
MEAS
C
µS
A
A
B
B
C
Immerse
probe beyond
upper steel
band
1. If necessary, press the MODE key to
select TDS mode.
See figure
2. Rinse the probe with de-ionized water or
a rinse solution, then rinse with a small
amount of calibration standard.
3. Dip the probe into the calibration
standard. Immerse the probe tip beyond
the upper steel band. Stir the probe gently
to create a homogeneous sample.
See figure
4. Wait for the measured TDS value to
stabilize. If the READY indicator has
been activated (set up program P7.1—
see page 34), the READY annunciator
lights when the reading is stable.
5. Press CAL/MEAS to enter TDS calibra-
tion mode. The CAL indicator will appear
above the display.
See figure
6. Press the ▲ or ▼ keys to change the
value on the primary display to match the
value of the calibration standard.
See figure
7. Press ENTER to confirm the calibration
value. The meter returns to the MEAS
(measurement) mode.
8. Repeat steps 1-7 for other ranges.
ATC
READY
CAL
C
ppm
C
ATC
READY
CAL
C
ppm
D
D
ATC
READY
MEAS
C
ppm
A
A
B
B
C
Immerse
probe beyond
upper steel
band
Calibrating for TDS directly
The factory default setting for TDS conversion factor is 0.5. If your solution has a dif-
ferent TDS factor, you can improve calibration accuracy by setting the TDS factor
prior to calibration. See SetUp Program P7.4 on page 37 for directions. See
Appendixes 1 and 2 on pages 48-49 to determine your exact TDS factor.
Notes
When entering calibration mode, the meter will display the factory default value. If
the meter was previously calibrated, the display may “jump” to the factory default
value when switching from measurement to calibration mode.
To exit from TDS Calibration mode without confirming calibration, DO NOT press
ENTER in step 6. Press CAL/MEAS instead. This will retain the meter’s old calibration
data in the measuring range of the calibration.
You can offset the TDS reading up to ±20% from the default setting. If your meas-
ured value differs by more than ±20%, clean or replace probe as needed.
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