AIRDATA MULTIMETER ELECTRONIC MICROMANOMETER 850 L0 pages

S AIRDATA™ MULTIMETER
i ELECTRONIC MICROMANOMETER

ADM-850L

®

AIRFLOW • VELOCITY • PRESSURE • TEMPERATURE
ECONOMICAL PRECISION MULTIMETE R
The ADM-850L Multimeter offers the unequaled
accuracy and flexibility of the Shortridge
Instruments AirData Multimeters in a simplified
model, at a reduced cost. This meter may be
ordered in the ADM-850L Multimeter kit,
complete with accessories for measuring air
velocity, pressure, and temperature, or as part of
the CFM-850L FlowHood kit.
DIFFERENTIAL PRESSURE MEASUREMENT
The AirData Multimeter measures an extremely wide range of
pressures from 0.0001 in wc to 60.00 in wc with very high
accuracy. Despite its sensitivity, this meter can endure 20 psi
differential pressure with no adverse effects. Although designed
for hand-held field use, this meter is as sensitive as some
laboratory micromanometers.
ACCURATE TEMPERATURE READINGS
The ADT440 TemProbe series is uniquely suited for wet bulb,
dry bulb, and water line temperatures. The optional eight-point
AirData MultiTemp is ideal for efficiency testing of air
conditioning units and heat exchangers.
FAST ACCURATE DUCT VELOCITY TRAVERSES
One person can now perform pitot tube traverses in half the
time previously required by two people. Each reading takes less
than ten seconds, with specified accuracy from 50 to 8,000 fpm.
AUTOMATIC ZERO AND RANGE SELECTION
Internal calibration, temperature compensation, range selection
and zeroing are fully automatic with each reading. No external
adjustments are ever needed.
AIR DENSITY CORRECTED FLOW AND VELOCITY
Airflow and velocity readings are automatically corrected for the
density effect of barometric pressure and temperature.
Readings are displayed as local density air velocity or flow.

NEW AIR BALANCE ACCURACY
When a capture hood is in place, the air delivery of an outlet is
reduced. This backpressure caused flow reduction varies from
one outlet or damper setting to another. The 8400 series
FlowHood represents a major breakthrough in direct airflow
measurement at supply and exhaust outlets. Each reading is
automatically compensated for the backpressure effect of the
FlowHood. Also, the FlowHood virtually eliminates AK correction
factors and the calculations necessary to convert average
velocity to airflow.
OPTIONS
The ADM-850L Multimeter kit includes the meter, carrying case,
and accessories for measuring air velocity,
differential pressure and temperature.
The series 8400 FlowHood kit
may be ordered separately
for
direct
airflow
measurement.
The ADM-850L meter is also
available without accessories as
part of the FlowHood model CFM850L. This model includes the
meter, the base metering section,
various top sizes and carrying
case.
The accessories for
measuring air velocity, pressure, and
temperature may be ordered as needed.

SPECIFICATIONS
AIR VELOCITY: ± 3% of reading ± 7 fpm from 50 to 8000 fpm pitot tube
(29,000 fpm FS); 50 to 5000 fpm AirFoil.

AIR DENSITY CORRECTION: Local air density correction range is
14 to 40 in Hg and 32°F to 158°F.

DIFFERENTIAL PRESSURE: ± 2% of reading ± 0.001 in wc from
0.0500 to 50.00 in wc, (0.0001 to 60 in wc FS); 20 psid safe pressure.

POSITION SENSITIVITY: Unaffected by position.

TEMPERATURE: ± 0.5°F accuracy from 32°F to 158°F using
ADT440 Series TemProbes (-67°F to 250°F FS); 0.1°F resolution.
AIRFLOW: Accuracy is ± 3% of reading ± 7 cfm from 100 to 2000 cfm;
range is 25 to 2500 supply, 25 to 1500 exhaust with 8400 FlowHood.
ABSOLUTE PRESSURE: ± 2% of reading ± 0.1 in Hg from 14 to 40
in Hg referenced to vacuum. 60 psia maximum safe pressure.

CALIBRATION: Calibration certified NIST traceable.
READOUT: 10 digit, 0.4", high contrast, liquid crystal display.
METER HOUSING: 6.0" x 6.4" x 2.7" high impact ABS. 36 oz.
CONNECTIONS: 1/4" OD slip-on for 3/16" ID soft tubing.
BATTERY LIFE: Up to 3000 readings/charge, 500 recharge cycles.

OPERATIONAL TEMPERATURE LIMITS: 40°F to 140°F.

Shortridge Instruments, Inc.
Printed in USA

7855 East Redfield Road • Scottsdale, Arizona 85260
Phone (480)991-6744 • Fax (480)443-1267 • www.shortridge.com

April 2008