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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.
5. The calibration range indicator will appear on the display for each range that is
calibrated during a power on cycle.
L
Low Range, 84μS/cm
M
Medium Range, 1413μS/cm or 3000 ppm SaH
H
High Range, 12,88mS/cm (12,880μS/cm)
NOTE: Each time the calibration mode is entered all calibration range indicators
will be cleared, but only the calibration data for the currently selected range will be
replaced. The calibrations for the other two ranges will be saved even though the
indicators for those ranges are no longer displayed. Calibration of all three ranges
must be performed during one power on period for all three calibration range
indicators to be displayed.
NOTE: As with all combination pH/conductivity probes, at low conductivity levels
the flow of the pH electrolyte may affect the readings and result in artificially high
conductivity readings. To eliminate the interference, low level conductivity or TDS
measurements should be taken with a meter that measures conductivity only.
Reset Calibration Data
Follow this procedure to clear all calibration data from the meter. Resetting the
calibration data may be necessary when new calibration solutions are used or
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