Shortridge Instruments FLOWHOOD AIRDATA CFM-88 User Manual

CFM-88L 07/20/092
2.0 SPECIFICATIONS
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).
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 extension wand to temperatures
above 200
/F.
AIR DENSITY CORRECTION: The air density correction range is 14-40 in Hg and 32
/F to 158/F for correction of air flow
measurements. The readings represent local density air flow corrected for the density effects of temperature and
absolute pressure.
RESPONSE TIME: Varies from one second at higher pressure inputs to seven seconds at pressure inputs less than 0.0003
in wc. Extremely low flow inputs require longer sample times than higher flow 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.
FLOWHOOD WEIGHT: FlowHood unit with meter and 2'x2' top, 10.0 lbs.
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.
WARNING: Do not plug the charger in if any non-rechargeable batteries are in the meter. The meter will be
seriously damaged along with the batteries and charger.
The approximate level of charge remaining in the batteries is displayed using a schematic battery symbol in the third
or fourth character of most displays. The battery symbol will have four different appearances, representing the
progressive decrease in the level of charge as the meter is used. A solid battery symbol represents a fully charged
battery. The shading changes to represent battery charge levels of 2/3, 1/3 and LOCHARGE, which is represented
by a hollow battery symbol.
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).

Shortridge Instruments FLOWHOOD AIRDATA CFM-88 Specifications

General

Brand	Shortridge Instruments
Model	FLOWHOOD AIRDATA CFM-88
Category	Measuring Instruments
Language	English