ADM-870C 07/14/094
3.0 EXTERNAL FEATURES
3.1 KEYPAD
The meter keypad has eight keys, each of which may include multiple functions. Functions are activated by pressing a
function key once, twice or in sequence with other keys. This Instruction Manual 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.
DENS Alternate action for local or standard density.
UNITS Alternate action for English or metric units.
CLEAR Clears memory, auto-read and average functions.
OFF Turns the meter off after SHIFT key is pressed.
AUTO Automatic repeat reading and TREND mode repeat.
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).
Also used to erase, replace and print readings in STORE mode.
ASSOC Recalls associated temperature and pressure for flow and velocity
STORE Activates memory mode, then alternate action for display of average, total, minimum and
maximum reading.
ON Turns the meter on. Turns light on and off after meter has been turned on.
= RCL Recalls stored readings in reverse order.
RCL
< Recalls stored readings in entry order.
READ Initiate measurement 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 measurements from the
FlowHood or VelGrid handgrip while working overhead or in awkward circumstances. The thumbswitch performs
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 inserted
here.
TEMPERATURE INPUT JACK
The temperature input jack is centered on the back of the meter, slightly toward the top. The flexible TemProbe
sensor must be connected to this receptacle whenever temperature density correction is desired for either flow or
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