TROUBLESHOOTING ST100A Series Flow Meter
104 Fluid Components International LLC
Table 35 – FE Fault Register (FE DF Command)
1
HTR_CURR_ADC_OVER_RANGE_FAULT
The heater current analog-to-digital converter shows
saturation at its input.
0x00000004
SENSOR_ABOVE_MAX_FLOW_FAULT
Process flow is above the maximum limit.
Process temperature is above the maximum limit.
Process temperature is below the minimum limit.
1-1 HEATER_SHORTED_FAULT
The heater is shorted or its value is below the normal
operating value.
0x00000200
1-2 HEATER_OPEN_FAULT
The heater is open or its value is above the normal
operating value.
0x00000400
1-3 HTR_CURR_ADC_FAULT
The heater current analog-to-digital converter (ADC) fails
to respond.
0x00000800
The Delta-R ADC fails to respond.
The Reference-R ADC converter fails to respond.
1-6 BRD_TEMP_LIMITS_FAULT
Temperature inside the unit is outside the limits (above or
below the operating limits).
0x00004000
1-7 I2C0_FAULT
The Inter-Integrated Circuit (I2C) channel 0 bus fails to
communicate.
0x00008000
2-0 SENSOR_BELOW_MIN_ADC_FAULT
The Reference-R ADC’s count number is below the
minimum.
0x00010000
The port expansion integrated chip fails to respond.
Delta-R value is below minimum limit.
2-4 TMP100_ADC_FAULT
The ADC for monitoring the temperature inside the unit
fails to respond.
0x00100000
The digital-to-analog converter fails to respond.
The FRAM of the Flow Element fails to respond.
3-0 HTRS_MON_ADC_FAULT
The ADC for monitoring heater’s conditions fails to
respond.
0x01000000
The Active excitation current Integrated Circuit (IC) fails.
3-2 REF_EXC_CURR_FAULT
The Reference excitation current Integrated Circuit (IC)
fails.
0x04000000
SENSOR_REFR_ABOVE_ABS_MAX
Reference-R value is above operating limit.
SENSOR_REFR_BELOW_ABS_MIN
Reference-R value is below operating limit.
Delta-R value is above operating limit.
Delta-R value is below operating limit.
The unit is performing a (diagnostic) test.
Notes: 1. Fault Type reflects factory default programming. The Fatal/Non-Fatal designation is programmable via the Configurator
software’s FE Faults tab (Factory branch menu tree – requires entry of appropriate level password).