TSI ALNOR LOFLO BALOMETER Manuel Du Propriétaire page 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 cfm (70 l/s, 255 m
The vent closed or vent open measurement is
greater than 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.
3
/h).
3
/h).
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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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