Section 10 Troubleshooting
Refer to the following table for common problem messages or
symptoms, possible causes and corrective actions.
Table 1 Calibration warnings and errors
Error/Warning
Solution
Calibration out of
range
Measured value out of range.
Calibrate again. Connect a new probe.
Unknown buffer
Calibrate again.
Examine the probe: Clean the probe (refer to
on page 14 for more information); make sure that
there are no air bubbles in the membrane. Shake the
probe like a thermometer; connect a different probe to
find if the problem is with the probe or the meter.
Examine the buffer solution: Make sure that the buffer
used matches the buffer specified in configuration; make
sure of the temperature specification in configuration; use
a new buffer solution.
Same buffer /
standard. Re-
calibrate
Unstable
measurement
Time > 100 s (pH,
EC and DO
calibrations)
Time > 240 s (ISE
calibrations)
Calibrate again.
Examine the probe: Clean the probe (refer to
on page 14 for more information); make sure that
there are no air bubbles in the membrane. Shake the
probe like a thermometer; connect a different probe to
find if the problem is with the probe or the meter.
Make sure that the membrane and the diaphragm are
properly immersed in the sample.
Temperature
difference > 3.0 ºC
Adjust the calibration solutions to the same temperature.
Examine the temperature sensor.
Temperature out of
range
Examine the temperature sensor.
Connect a new probe.
Table 1 Calibration warnings and errors (continued)
Error/Warning
Solution
Outside allowable
range
Offset or Slope outside the range.
Examine the buffer solution: Make sure that the buffer
used matches the buffer specified in configuration; make
sure of the temperature specification in configuration; use
a new buffer solution.
Examine the probe: Clean the probe (refer to
on page 14 for more information); make sure that
there are no air bubbles in the membrane. Shake the
probe like a thermometer; connect a different probe to
find if the problem is with the probe or the meter.
Signal too low / high
(DO calibrations)
DO probe error.
Examine the probe. Connect a different probe to make
sure that if problem is with probe or meter.
Use a new standard solution.
Cell constant over
limits (EC
calibrations)
Insert the probe into the appropriate standard and re-
read.
Examine the probe: Clean the probe (refer to
on page 14 for more information); make sure that
there are no air bubbles in the membrane. Shake the
probe like a thermometer; connect a different probe to
find if the problem is with the probe or the meter.
Cell constant
deviation error (EC
calibrations)
Not calibrated
There are no calibration data stored in the instrument.
Perform calibration.
16
English
Summary of Contents for sensION MM340
Page 2: ...Table of Contents English 3 Fran ais 20 Espa ol 38 Portugu s 56 74 90 108 125 2...
Page 6: ...1 2 3 4 6 English...
Page 15: ...1 2 English 15...
Page 23: ...1 2 3 4 Fran ais 23...
Page 33: ...1 2 Fran ais 33...
Page 41: ...1 2 3 4 Espa ol 41...
Page 51: ...1 2 Espa ol 51...
Page 59: ...1 2 3 4 Portugu s 59...
Page 69: ...1 2 Portugu s 69...
Page 76: ...1 1 5 2 pH 4 01 pH 7 00 pH 10 01 6 o 3 7 4 8 3 3 1 76...
Page 77: ...1 2 3 4 77...
Page 78: ...3 2 1 2 2 3 3 4 2 1 1 1 7 PC DIN 2 2 8 1 3 1 9 pH 1 4 1 10 pH 2 5 PC RS 232 11 2 2 6 3 78...
Page 85: ...9 9 1 9 2 87 9 3 85...
Page 86: ...1 2 86...
Page 91: ...2 1 1 2 1 2 2 2 ICES 003 A A FCC PART 15 A FCC 15 1 2 FCC 15 A 1 2 3 4 5 91...
Page 93: ...1 2 3 4 93...
Page 95: ...4 4 1 1 5 2 6 3 7 1 2 4 1 2 4 2 ID ID 4 1 ID 4 2 pH ORP mV ISE 5 F 3 6 4 3 5 5 1 AC 5 2 95...
Page 102: ...9 9 1 9 2 104 9 3 102...
Page 103: ...1 2 103...
Page 110: ...sensION MM340 2 pH ORP mV ISE PC 2 4 1 1 1 5 2 pH 4 01 pH 7 00 pH 10 01 6 3 7 4 8 3 3 1 110...
Page 111: ...1 2 3 4 111...
Page 120: ...1 2 120...
Page 121: ...10 1 119 100 pH EC DO 240 ISE 119 3 0 C 1 119 DO DO 119 EC 121...
Page 128: ...1 2 3 4 128...
Page 136: ...9 1 9 2 138 9 3 136...
Page 137: ...1 2 137...
Page 138: ...10 1 136 100 s pH EC DO 240 s ISE 136 3 0 C 1 136 DO DO EC 136 EC 138...
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