CFM-88L 07/20/097
HALT
This message will be displayed when a TREND mode sequence has been halted manually by holding down the READ
key. The meter automatically switches to the manual reading mode and displays a standard manual reading after HALT
is displayed.
LIGHT OFF
This message indicates that the display back-light has been turned off. Battery time is extended when the back-light
is turned off.
LIGHT ON
This message indicates that the display back-light has been turned on. Battery time is reduced when the back-light is
turned on.
LOCHARGE
This message indicates that the battery cells are nearing the end of their useful charge. The meter will continue to
function normally for about twenty minutes, depending on light use, before recharge is required. The third or fourth
character of all displayed readings will become the symbol for an empty battery cell.
LS CORR
This message indicates that the air flow measurement is in liters/sec and will be backpressure compensated.
LS UNCORR
This message indicates that the air flow measurement is in liters/sec and will not be backpressure compensated.
MANUAL
This message is displayed (followed by READING) during the manual reading that is taken when a series of TREND
readings is halted.
METRIC
This message indicates that the readings will be in metric units. Pressing the UNITS key will switch the meter to English
units. The meter will store the units selection (metric or English) and will automatically start up in the selected units the
next time it is turned on.
NO FLAPS
This message advises that the flaps plug on the FlowHood has not been connected to the meter for air flow
measurements. The meter senses the position of the flaps through the flaps plug.
NO LIGHT
This message will appear as part of the NO LIGHT/BATTERY/TOO LOW sequence, when the battery charge is too low
to support use of the backlight.
NO LIGHT/BATTERY/TOO LOW
This sequence of messages indicates that the battery charge is low and the back-light may not be used until the batteries
are recharged.
NO PROBE
This message appears when the operator has neglected to install the TemProbe sensor prior to initiating a temperature
measurement. This message is also displayed if the TemProbe or extension cord has been damaged so as to create
an open circuit.
OPEN FLAPS
This message advises that the operator has attempted to perform a nonbackpressure compensated air flow
measurement at greater than 500 cfm with the flaps closed. The flaps must be opened to proceed.
OVER FLOW
This display advises the operator that the air flow measurement being attempted is beyond the range of the meter.
OVER TEMP
This display advises the operator that the temperature measurement being attempted exceeds the upper range of the
meter.
RATIO ERR
This message advises the operator that the backpressure compensated air flow measurement, which is in process, is
invalid because the numerical ratio of the two parts of the measurement sequence exceeds the predetermined limits.
Normally, this means that the operator has made a procedural error, or that a dynamic change (such as a changed
damper setting) has occurred between the two parts of the backpressure compensated air flow measurement process.
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