TSI Alnor LoFlo Balometer El Manual Del Propietario página 13

When "–––" is displayed at the last step of the 2-point mode, the calculation for the resistance effect cannot be made. It
can be caused by any of the conditions listed here.
Condition
The vent closed or vent open measurement is less than 150
3
cfm (70 l/s, 255 m /h).
The vent closed or vent open measurement is greater than
3
500 cfm (235 l/s, 850 m
The vent open measurement minus the vent closed
measurement is too small (< 0).
The vent open measurement minus the vent closed
measurement is too large.
 NOTE: The display will also show "–––" when the return mode is selected. The 2-point measurement mode is for
supply only.
/h).
7
Reason
•
Calculations are not made at the low end since the
effect is small and can generally be neglected. Use 1-
point mode.
•
Calculations are not made beyond the calibrated range.
•
A mistake has occurred in the process. Repeat the
two-point measurement.
•
The resistance effect is small and was overwhelmed
by natural fluctuations. Use single-point mode.
•
A mistake has occurred in the process. The vent may
not have been open for the open vent measurement.
Repeat the two-point measurement.
•
The effect is beyond the range of the compensation
equation. Perform a traverse of the system instead.
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