26 | RPT 301 User Manual |
5 Maintenance
5.1General
User maintenance on this instrument is limited to checking the LED indicator, a diagnostic mode and cleaning the case.
5.2LED Indicator
With the lid of the instrument removed, an LED located on the PCB flashes when a pressure conversion is carried out. This indicates that the instrument has power, that the processor is functioning and the transducer frequency and diode voltage are within normal limits.
5.3Diagnostic Mode
D - Diagnostic Mode
This command places the instrument into the diagnostic mode.
Command: D, mode
Where: | mode is a single digit: |
1Dump all 512 stored values.
2Dump transducer coefficients (checks LOAD L command).
3Dump calibration factors i.e. gain, offset etc.
4Continuous output of sensor diode voltage (temperature) mV.
5Continuous output of sensor frequency in Hz.
Result: The reply depends on the mode as follows:
Mode 1
32 lines of output as follows:
aaa- nn nn nn nn nn nn nn nn nn nn nn nn nn nn nn nn<RT> where: aaa = hexadecimal address offset (0 to 1FFH) and
nn = hexadecimal data