ADM-870C 07/14/093
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.
BATTERY CHARGERS: The battery charger (P/N PS8201) used in the U.S.A. and many other countries requires 120 Volts
AC, 60Hz, 8W. The battery charger (P/N PS8202) used in Europe and certain other locations requires 220 Volts AC,
50Hz. Both chargers deliver 24 Volts AC to the meter. Batteries may be left on charge for an unlimited time
without harm. The temperature of the instrument during charge should be kept between 40
/ F and 113/ F (5/ C to
45
/ C). The meter is fully operational during recharge.
OPERATIONAL TEMPERATURE LIMITS: The specified accuracy for measurements is maintained over a meter exposure
temperature range of 40
/ F to 140/ F (5/ C to 60/ C).
STORAGE TEMPERATURE LIMITS: -4
/ F to 140/ F (-20/ C to 60/ C).
AIR BLEED: Each pressure measurement requires a small volume of air to pass through the meter. The pressure source
must be capable of supplying this volume without significant depletion to assure accurate measurements. Bleed
through is typically 0.0004 cubic inch per in wc per measurement. Quiescent bleed through (maximum) is 0.0005
cubic inch per in wc per minute.
TUBING: The maximum recommended length of pneumatic tubing for the measurement of air flow, velocity, or differential
pressure is 18 feet. Minimum tubing size is 3/16 inch, inside diameter. The VelGrid is used with the two eight foot
lengths of 3/16 inch ID tubing furnished with the kit.
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