ADM-870 05/23/084
3.0 EXTERNAL FEATURES
3.1 KEYPAD
The meter keypad has eight keys. Each key may include multiple functions that may be activated, either
alternately, or by pressing the shift key followed by the function key. The instructions will often refer to
a key by only one of the functions shown on the key.
A. Upper half of keys SILVER - active only after pressing "SHIFT" key.
Control name Function
SHIFT Shifts control from lower to upper half of keys and vice versa.
UNITS Alternate action for English or metric units.
DENS Alternate action for local or standard density.
CLEAR Clears memory, auto-read and average functions.
OFF Turns the meter off.
AUTO Automatic repeat reading.
B. Lower half of keys BLACK - always active except following SHIFT.
Control Name Function
MODE Sequential action for all measurement modes (air flow, velocity, pressure and
temperature).
ASSOC Recalls associated temperature and pressure for flow and velocity
STORE Activates memory mode, then alternate action for average and for total. (This key was
labeled "MEM" prior to May, 1993).
ON Turns the meter on.
= RCL Recalls stored readings in reverse order.
RCL
< Recalls stored readings in entry order.
READ Initiate measurement, and SPEED-READ or halt automatic readings.
3.2 FEATURES ON SIDES AND BACK OF METER
BATTERY CHARGER JACK
When viewed from the front, the battery charger jack is on the right side of the meter toward the top. The
battery charger plug is to be connected here.
EXTERNAL READ JACK
When viewed from the front, the external read jack is on the left side of the meter toward the top. The
plug for the external thumbswitch is connected here. This feature allows the operator to trigger air flow
measurements from the FlowHood or VelGrid handgrip while working overhead or in awkward
circumstances. The thumbswitch performs exactly the same function as the READ key.
FLAPS JACK
The flaps jack is on the back of the meter, in the upper right hand corner. The flaps plug on the FlowHood
is connected here.
TEMPERATURE INPUT JACK
The temperature input jack is centered on the back of the meter, slightly toward the top. The flexible
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