ADM-860C 04/14/0817
If the meter is being used with the back-light turned off, the user will have approximately 20 minutes of runtime
before the meter displays RECHARGE/SHUT DOWN and turns itself off. The time period will vary depending
on prior use. The batteries must be recharged prior to further use.
If the meter is being used with the back-light turned on, the user will have approximately 5 to 20 minutes of
runtime before the meter displays RECHARGE/SHUT DOWN and turns itself off. The time period will vary
depending on prior use. The meter may be turned back on without the back-light and used until LOCHARGE
is displayed. The colon normally shown following the units for a displayed reading will be replaced by a symbol
for an empty battery cell. The user will have 5 to 10 minutes of runtime before the meter displays
RECHARGE/SHUT DOWN and turns itself off. The batteries must be recharged prior to further use. See
Section 2.0 SPECIFICATIONS and APPENDIX C for more information about the batteries and the battery
charger.
The battery status and reading selections in effect can always be viewed by pressing SHIFT/SHIFT. The first
display represents the approximate level of charge remaining in the batteries. The display will read BATT FULL
if the batteries are highly charged. The display will read BATT 2/3, BATT 1/3, or LOCHARGE as the level of
charge decreases. The meter will then display the measurement mode (for instance, VelGrid)and the units
selected (English or metric). If the temperature probe is not being used during flow or velocity readings, the
standard temperature (STD 70
/ F or STD 21.1/ C) will be displayed. NOTE: A battery charge level displayed
when the meter is first turned on may not be representative of the true level of battery charge. Wait five or ten
minutes after turning the meter on to view the charge status.
5.2 TREND READINGS
TREND mode displays a continuous series of readings about once per second. TREND mode is ideal for
closely tracking a changing environment, such as when damper settings are being changed. TREND displays
a continuous series of readings as the air velocity or flow being adjusted approaches the set point.
TREND mode sequential readings are optimized for speed, not accuracy. When the air has stabilized near the
required setting, the meter can be switched to the MANUAL reading mode for more accurate readings.
TREND mode is selected by pressing SHIFT/READ. Press and hold down READ until the meter displays HALT
to exit TREND mode. The meter will automatically switch to the standard reading mode and a valid manual
reading will be displayed after the TREND readings have been halted.
5.3 MEMORY/AVERAGE/TOTAL FUNCTION
The memory/average/total function may be used with any of the measurement modes and allows the storage
of up to 100 individual readings for later recall of each reading, the average, and the sum of the readings, and
the minimum and maximum readings.. This capacity may be used to facilitate such tasks as pitot tube duct
traverses, VelGrid face velocity measurements, and the recording of outlet readings. These functions also
assist in the averaging of coil face velocities and temperatures, static pressures, and pressure drop readings.
The STORE key is used only with the memory related functions and serves several purposes. Pressing the
STORE key places the meter in the memory mode. Press the STORE key after readings have been entered
into memory to alternately display the average, sum, minimum and maximum of the readings. The memory is
cleared by pressing the SHIFT key and then the CLEAR key.
The meter stores individual readings with greater resolution than the rounded figures that are displayed. These
stored values are used to calculate the sum and average. There may be a very small difference between the
sum and average calculated by the meter and a sum and average calculated by the user from the individual
readings.
5.3.1 MEMORY OPERATION
Press the MODE key. The meter will flash the selected function followed by a READ prompt. Press the STORE
key. The meter will display STORE RDY and is now ready to store a sequence of readings. Press the READ
key to take a reading. The meter will display the mode, and then the units, prior to displaying the first reading.
If readings are being taken in flow or velocity, LOCAL DENS will also be displayed. If the TemProbe is not in
place during flow or velocity measurements, the meter will display STD 70
/ F or STD 21.1/ C prior to the display
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