ADM-860C 04/14/0813
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.
NEG PITOT
This message indicates an invalid, negative, pitot tube velocity reading. This may result from reversed tube
connections to the meter, or from other conditions described in Section 6.2 PITOT TUBE VELOCITY
MEASUREMENT.
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 back-light.
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.
NOT ALLOWD
This message is displayed if the user tries to select STORE mode while in TREND mode.
NP 0
This message is displayed when a stored NEG PITOT reading is accessed using a RCL key.
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 PRES
This display advises the operator that the pressure measurement being attempted is beyond the range of
the meter. OVER PRES may also be displayed if internal voltage settings or linearity is out of proper range.
(Contact factory if meter continues to read OVER PRES at inappropriate times).
OVER TEMP
This display advises the operator that the temperature measurement being attempted exceeds the upper
range of the meter.
OVER VEL
This display advises the operator that the velocity measurement being attempted is beyond the range of the
meter. OVER VEL may also be displayed if internal voltage settings are out of proper range. (Contact
factory if meter continues to read OVER VEL at inappropriate times).
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