Hanna Instruments ec 214 用户手册
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• Press the “COND/ C” key to select conductivity
reading and select the appropriate range:
"199.9 µS"
for HI7033/HI8033,
"1999µS"
for HI7031/HI8031,
"19.99 mS"
for HI7030/HI8030,
"199.9 mS"
for HI7034/HI8034.
Note: If the display shows "1", there is an over-range condition.
Select the next higher range.
••••• Allow a few minutes for the reading to stabilize and adjust the
“CALIBRATION” knob to read (on the LCD) the value of the buffer
solution at 25 C (77 F), e.g. 12.88 mS/cm.
solution at 25 C (77 F), e.g. 12.88 mS/cm.
• All subsequent measurements will be referenced to 25 C (77 F).
• To reference the measurements to 20 C (68 F), adjust the “CALI-
• To reference the measurements to 20 C (68 F), adjust the “CALI-
BRATION” knob to read (on the LCD) the value of the buffer
solution at 20 C (68 F), e.g. 11.67 mS/cm. See conductivity vs.
temperature chart.
solution at 20 C (68 F), e.g. 11.67 mS/cm. See conductivity vs.
temperature chart.
• Calibration is now complete and the instrument is ready for use.
PROCEDURE FOR EC 215:
• Pour a small quantity of the conductivity
solution, e.g. HI7030 or HI8030 (12.88
mS/cm @ 25 C), into a plastic beaker.
mS/cm @ 25 C), into a plastic beaker.
• Immerse the probe in the solution submerging
the holes of the sleeve (0.5 cm below). Tap
the probe lightly on the bottom of the beaker
to remove any air bubbles trapped inside the
sleeve.
the probe lightly on the bottom of the beaker
to remove any air bubbles trapped inside the
sleeve.
• Adjust the "TEMPERATURE COEFFICIENT" knob to 2%/ C.
The instrument should be re-calibrated at least once a month, or
when the probe is changed.
when the probe is changed.
INITIAL PREPARATION
If you are measuring in the mS ranges, calibrate the meter using
HI7030 (or HI8030) conductivity solution (12.88 mS @ 25 C) or
HI7034 (or HI8034) conductivity solution (80 mS @ 25 C). For the
µS ranges, use HI7031 (or HI8031) conductivity solution (1413 µS
@25 C) when calibrating in the range from 0 to 1999 µS or
HI7033 (or HI8033) conductivity solution (84 µS @ 25 C) when
calibrating in the range from 0 to 199.9 µS.
Choose a solution with a conductivity value close to the solution to be
measured.
Rinse the probe thoroughly in distilled water. This is to minimize
contamination of the calibration solution and secure higher accuracy.
When possible, use plastic beakers to minimize any EMC interfer-
ences.
HI7030 (or HI8030) conductivity solution (12.88 mS @ 25 C) or
HI7034 (or HI8034) conductivity solution (80 mS @ 25 C). For the
µS ranges, use HI7031 (or HI8031) conductivity solution (1413 µS
@25 C) when calibrating in the range from 0 to 1999 µS or
HI7033 (or HI8033) conductivity solution (84 µS @ 25 C) when
calibrating in the range from 0 to 199.9 µS.
Choose a solution with a conductivity value close to the solution to be
measured.
Rinse the probe thoroughly in distilled water. This is to minimize
contamination of the calibration solution and secure higher accuracy.
When possible, use plastic beakers to minimize any EMC interfer-
ences.
PROCEDURE FOR EC 214:
• Pour a small quantity of the conductivity
solution, e.g. HI7030 or HI8030 (12.88
mS/cm @ 25 C), into a plastic beaker.
mS/cm @ 25 C), into a plastic beaker.
• Immerse the probe in the solution submerging
the holes of the sleeve (0.5 cm below). Tap
the probe lightly on the bottom of the beaker
to remove any air bubbles trapped inside the
sleeve. Take the temperature of the solution
with a CHECKTEMP or a glass thermometer.
the probe lightly on the bottom of the beaker
to remove any air bubbles trapped inside the
sleeve. Take the temperature of the solution
with a CHECKTEMP or a glass thermometer.
• Press the “COND/ C” key to select temperature
setting.
• Adjust the “TEMPERATURE” knob to display the temperature of
the solution on the LCD.
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CALIBRATION
CALIBRATION
CALIBRATION
CALIBRATION
CALIBRATION
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