Sea-Bird Electronics SBE 38 Manual do Utilizador descarregar pdf (Página 104)

Manual revision 006 Section 6: Troubleshooting SBE 19plus V2

104

Problem 3: Nonsense or Unreasonable Data

The symptom of this problem is a data file that contains nonsense values (for

example, 9999.999) or unreasonable values (for example, values that are

outside the expected range of the data).

Cause/Solution 1: A data file with nonsense values may be caused by

incorrect instrument configuration:

• Bad data may be caused by incorrect configuration in the 19plus V2. Send

GetCD or DS to verify the 19plus V2 setup matches the instrument

Configuration Sheet (correct pressure sensor, voltage sensors assigned to

correct channels, etc).

• Bad data may be caused by incorrect configuration in the instrument

.xmlcon or .con configuration file. Verify the settings in the configuration

file match the instrument Configuration Sheet.

Cause/Solution 2: A data file with unreasonable (i.e., out of the expected

range) values for temperature, conductivity, etc. may be caused by incorrect

calibration coefficients:

• If you manually uploaded data in engineering units (OutputFormat=1, 3,

or 5) – Bad data may be caused by incorrect calibration coefficients in the

19plus V2. Send GetCC or DCal to verify the calibration coefficients in

the 19plus V2 match the instrument Calibration Certificates. Note that

calibration coefficients do not affect the raw data stored in 19plus V2

memory. If you have not yet overwritten the memory with new data, you

can correct the coefficients and then upload the data again.

• If you are viewing real-time data in Seasave, manually uploaded data in

raw hexadecimal (OutputFormat=0), or used Seaterm232’s Upload

menu to upload data and are processing the data in Seasave or SBE Data

Processing - Bad data may be caused by incorrect calibration coefficients

in the instrument .xmlcon or .con configuration file. Verify the calibration

coefficients in the configuration file match the instrument Calibration

Certificates.

• For RS-232 sensors interfacing to the 19plus V2: Bad data may be caused

by incorrect calibration coefficients programmed into the RS-232 sensor.

Connect the sensor directly to the computer and use Seaterm232 of

SEATERM to verify the calibration coefficients match the instrument

Calibration Certificate.

Problem 4: Program Corrupted

Cause/Solution 1: In rare cases, the program that controls the 19plus V2

microprocessor can be corrupted by a severe static shock or other problem.

This program can be initialized by using the reset switch. Proceed as follows

to initialize:

1. Open the battery end cap and remove the batteries

(see Replacing /Recharging Batteries in Section 5: Routine Maintenance

and Calibration).

2. There is a small, pushbutton switch on the battery compartment bulkhead,

which is visible after the batteries are removed. The switch is used to

disconnect the internal lithium batteries from the electronics. Push the

switch in for 1 second.

3. Reinstall or replace the batteries, and close the battery end cap.

4. Establish communications with the 19plus V2 (see Section 3: Power and

Communications Test). Send GetSD or DS to verify that the date and time

and sample number are correct.

Note:

Using the reset switch does not affect

the 19plus V2 memory - data in

memory and user-programmable

parameter values are unaffected.

Note:

Each 19plus V2 is shipped with a

configuration (.con) file that matches

the configuration of the instrument

(number and type of auxiliary

sensors, etc.) and includes the

instrument calibration coefficients.

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