ADM-860C 04/14/082
2.0 SPECIFICATIONS
AIR VELOCITY: Measured in feet per minute (fpm), or meters per second (m/s), corrected for local air density.
The measurement range is 25 to 29,000 fpm with a pitot tube, and 25 to 5,000 fpm with the Shortridge
Instruments, Inc. AirFoil probe. The measurement range using the VelGrid is 25 to 2500 fpm. Accuracy
is ± 3% of reading ± 7 fpm from 50 to 8000 fpm. Pitot tube velocity readings from 8,000 fpm to 29,000 fpm
are based on compressible isentropic flow theory and are not certified NIST traceable.
DIFFERENTIAL PRESSURE: Measured in inches of water column (in wc) or Pascals (Pa). The measurement
range is from 0.0001 to 60.00 in wc. Maximum safe pressures are 20 psid (900% full scale) and 60 psia
common mode. Accuracy is ± 2% of reading ± 0.001 in wc from 0.0500 to 50.00 in wc.
ABSOLUTE PRESSURE: Measured in inches of mercury (in Hg) or bars with reference to a vacuum. The
measurement range is 10-40 in Hg. Maximum safe pressure is 60 psia. Accuracy is ± 2% of reading ± 0.1
in Hg from 14 to 40 in Hg.
TEMPERATURE: Accuracy is ± 0.5
/ F from 32/ F to 158/ F with a resolution of 0.1/ F using the ADT442,
ADT443, ADT444, ADT445 or ADT446 TemProbes. Meter will display readings from -67.0
/ F to 250.0/
F. Safe exposure range for TemProbe is -100/ F to 250/ F. Do not expose the plastic base of the
TemProbe or the extension wand to temperatures above 200
/ F.
AIR FLOW: Measured in cubic feet per minute (cfm) or liters per second (L/s), corrected for local air density. This
function requires the use of the Shortridge Instruments' Series 8400 Backpressure Compensating
FlowHood System. The measurement range is 25 to 2500 cfm supply and 25 to 1500 cfm exhaust.
Accuracy is ± 3% of reading ± 7 cfm from 100 to 2000 cfm (nonbackpressure compensated readings).
AIR DENSITY CORRECTION: The air density correction range is 14-40 in Hg and 32
/ F to 158/ F for correction
of air flow and velocity measurements. The readings represent local density air flow or velocity corrected
for the density effects of temperature and absolute pressure.
MEMORY:100 readings with sequential recall of each reading with the average, the sum, minimum and maximum
readings.
RESPONSE TIME: Varies from one second at higher pressure inputs to seven seconds at less than 0.0003 in
wc (70 fpm). Extremely low pressure/flow/velocity inputs require longer sample times than higher
pressure/flow/velocity inputs. TREND mode provides continuous readings in less than two second
intervals. (Accuracy specifications do not apply in TREND mode).
READOUT: Ten digit, 0.4 inch, liquid crystal display (LCD).
METER HOUSING: High impact, molded, "T" grade ABS.
METER WEIGHT: 36 ounces (1.02 kg), including batteries.
SIZE: 6.0" x 6.4" x 2.7" (15.2 x 16.3 x 6.9 cm).
BATTERY LIFE: A ten-hour charge will normally allow two working days of heavy use, or up to 3000 readings
per charge if the back-light is not being used. Increasing the charge time to 48 hours (such as a weekend)
will increase the working time by 25%. Continuous use of the back-light may reduce the battery life by up
to one half.
A set of rechargeable type AA NiCad batteries is supplied in each meter. Each battery has a storage
capacity of 1100 milliAmp hours. These batteries may be recharged up to 500 times before replacement.
If 1100 mAh batteries are not available in a field situation, 700 mAh batteries (all 12 ) may be substituted.
If 700 mAh batteries are mixed with 1100 mAh batteries, the 700 mAh batteries may be damaged as the
battery charge is depleted. If rechargeable batteries are not available in a field situation, the batteries may
be replaced with 12 non-rechargeable "AA" pen cell batteries.
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