3-O&M_Settings_r1r Section 3Page 41
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3.15.4. FAW Samples [FAW SMPLS]
The sample size used to determine the average, uncorrected, total airflow rate of the transmitter to calculate
GAIN and OFFSET coefficients when the FLOW ADJUST WIZARD (FAW) tool is used (Section 4).
[Menu path: SETTINGS >↓ ADJUSTMENTS >↓ FAW SMPLS]
Default: 100
Optional Settings: 1 to 999
Transmitters calculate the airflow every 300 milliseconds. The default integration of 100 calculates the
average of all sensor nodes over the preceding 30 second time period.
Be certain the HVAC system is not changing faster than the integration buffer is set to ensure
accurate measurement data.
3.15.5. Airflow or Pressure Gain Adjustment [GAIN]
The third-party gain coefficient used to modify the airflow or pressure measurement of the transmitter.
[Menu path: SETTINGS >↓ ADJUSTMENTS >↓ GAIN]
Default: 1.000
Optional Setting: 0.100 to 9.999
3.15.5.1. ALL PROBE TYPES EXCEPT -B CONFIGURED FOR DPCONVERT = YES
The gain adjustment modifies the airflow output by multiplying the unadjusted average airflow by the gain
coefficient. The GAIN coefficient can be entered manually or automatically using the FLOW ADJUST
WIZARD (FAW) when a one- or two-point adjustment is desired.
If the transmitter is configured for two locations, parameters for GAIN1 and GAIN2 will be displayed in
lieu of GAIN.
Use a gain factor rather than an offset factor when a single point adjustment is used.
3.15.5.2. -B PROBE TYPE CONFIGURED FOR DPCONVERT = YES
The gain adjustment modifies the pressure output by multiplying the unadjusted average pressure by the gain
coefficient. The GAIN coefficient is entered manually.
3.15.6. Airflow or Pressure Offset Adjustment [OFF]
The third-party offset coefficient used to modify the airflow or pressure measurement of the transmitter.
[Menu path: SETTINGS >↓ ADJUSTMENTS >↓ OFF]
3.15.6.1. ALL PROBE TYPES EXCEPT -B CONFIGURED FOR DPCONVERT = YES
The offset adjustment modifies the airflow output by adding or subtracting the unadjusted average airflow by
the offset coefficient. The OFFSET coefficient can be entered manually or automatically using the FLOW
ADUST WIZARD (FAW) when a two-point adjustment is desired.
If the transmitter is configured for two locations, parameters for OFF1 and OFF2 will be displayed in
lieu of OFF.
Offset values must be entered in the units of F_ADJ UM.
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