15
Calibration Reminder
The “CAL” indicator will appear when the TRACER is in the pH mode and a
calibration is required. The “CAL” indicator will appear if the meter has not
been calibrated after 15 on/off cycles of the meter. Some applications may
require more frequent calibrations than others. The “CAL” indicator is only a
reminder and will not affect function in any way. The indicator will no longer
be displayed when the pH electrode is recalibrated.
RENEW Indicator
A flashing “RENEW” indicator will appear on the display to warn that
the electrode is not performing to expected specifications. If cleaning
or recalibration does not cause the RENEW indicator to disappear, the
electrode should be replaced. The RENEW indicator will appear when the pH
electrode slope falls below 70% of a nominal slope.
Calibration: Conductivity
Meter accuracy verification should be performed on a periodic basis as
needed.
If calibration is required, the meter must be in the conductivity
mode to perform all calibrations for conductivity, TDS and salinity
. The
meter can perform calibrations and store the data for each of the three
ranges–low, medium and high. The automatic calibration recognition
procedure will recognize conductivity standards of 84µS (Low), 1413µS
(Medium) or 12,880µS (12.88mS) (High). (See Page 6). Always calibrate in
the range closest to the expected measurement value.
For salinity samples
within the range of 1.00 to 9.99 ppt salinity, calibrate with a 12,880µS
calibration standard
.
1. Fill a sample cup to 20 mL line with a conductivity standard.
NOTE: The meter allows for a 1, 2, or 3 point calibration. If calibration
is done for more than one point, the lowest concentration should be
done first to obtain the best accuracy. Calibrate the ranges from low
to high
2. Press the ON/OFF button to turn the TRACER on. Insert the electrode
into the standard. Tap or stir the sample with the Tracer to dislodge
air bubbles.
3. Press and hold the CAL button for approximately 2 seconds until the
display begins to flash.
4. The meter will automatically recognize and calibrate to the
conductivity standard. The display will briefly indicate “SA” and “End”
and then return to the measurement mode.
NOTE: “SA” will not appear if the calibration fails.
