Maintenance And Service - WEBTEC DP130 Manual Del Usuario

Maintenance and service

Each time power is applied to the DP130, it performs a series of internal diagnostic tests. A lamp test (all display
segments ON) is conducted while these tests are in progress. If a failure occurs, an error message will appear on the
display. Additionally, once the unit is up and running, an out of range message (flashing OL or -OL ) may occur, indicating
that the scaled input signal (display reading) is greater than 1999 or less than -1999 respectively (disregard the decimal
point place).
The diagnostic tests are checksum calculations of internal memory, to verify that data stored in memory at power down
is still there at power up. The first tests are performed on internal ROM and RAM. Failure results in an error message
(Err). This error is non-recoverable, and the unit should be returned to the factory for repair.
Programming and calibration data is stored in non-volatile memory (NOVRAM). A failure in the programming section
of NOVRAM results in the displayed error message (PrG), which remains on the display until power is cycled OFF,
then ON, to the unit, or until a key is pressed. When this error occurs the unit loads default values into all programming
parameters. This error is recoverable by re-programming the DPM. An error message (CAL)indicates that the calibration
section of NOVRAM, or both sections, has been corrupted, or that the calibration data does not match the input board
type. THERE IS NO DIAGNOSTIC TEST TO DETERMINE THAT THE DP130 IS CALIBRATED! In this case, the unit
loads default values into all programming and calibration parameters. This error is recoverable by re-programming and
recalibrating the unit. If subsequent errors occur, the NOVRAM itself may have failed and the unit should be returned
to the factory for repair.
Accessories
Webtec produce a number of flow, temperature and pressure measuring devices suitable for connection to these panel
meters. For more information see bulletins for CT, CTR, Flowhub, TP125 and MPT or contact the Webtec sales office
for help and advice.
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