MARTINDALE
E L E C T R I C
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INSTRUCTIONS
THERMO ANEMOMETER
AV90
SPECIFICATIONS AND FEATURES
A. Portable digital Thermo-Anemometer.
B. Simultaneous display of both temperature and air speed.
C. Memory of maximum, minimum and average record for both temperature
and wind speed.
D. Air velocity average for multiple points.
E. Auto power off function.
F. 2 meter coiled cable and mounting nut for long extension.
GENERAL
Low battery indication: The " " is displayed when the battery voltage drops
below the operating level
Accuracy:
Stated accuracy at 23°C ± 5°C, <80% relative humidity
Operating environment:
0°C to 50°C at <75% relative humidity
Storage environment:
-20°C to 55°C at <80% relative humidity
Battery:
Standard 9V battery (NEDA 1604, IEC 6F22 006P)
Battery Life:
200 hours typical with carbon zinc battery
Dimensions:
770(H) x 65.5(W) x 35mm(D)
Weight:
390g including battery and probe
MAX MIN Record Mode
Press MIN/MAX button to enter the MIN MAX Recording mode. In this
mode, the automatic power off feature, °C/°F button & UNIT buttons are
disabled, and the measurement period will be set to 2 seconds.
Push MIN MAX key to cycle through the MAX (maximum), MIN (minimum),
MAX -MIN (maximum minus minimum) and AVG (average) readings. In this
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mode, press the HOLD key to stop the recording of readings, all values are
frozen, press again to restart recording. Press and hold down the MIN MAX
button for 2 seconds, or press the RESET button to exit and erase recorded
readings.
2 sec. / 16 sec. Average Mode
Pressing the 2sec/16sec button sets the measurement period to 2 seconds.
"AVG 2" is displayed in the lower left hand side corner of the display. The first
reading will hold for two seconds and flash "2" on the display, and then update
every two seconds with average for the last two seconds. The default setting for
the measuring period is 2 seconds. Pressing the 2sec/16sec button again sets
the measurement period to 16 seconds. "AVG 16" is displayed in the lower left
hand side corner of the display. The first reading will hold for sixteen seconds
and flash "16" on the display, and then update every two seconds with average
for the last sixteen seconds.
Multi Point Average Mode
1. Place the probe head in the area where air velocity is to be measured.
Press the HOLD button to take the measurement and enter the data hold mode.
The anemometer holds the reading.
2. Press the MAX MIN button. The second display will show a count. This
number represents the point that is being recorded.
3. Repeat this process until all desired points have been measured and recorded.
4. Press the MULTI POINT button. This will display the average air velocity
reading and number of points measured. The anemometer can recorded a total
of 8 points at one time, and calculate the average for the last 8 points.
5. Press and hold down the MULTI POINT button or press the RESET button
for 2 seconds to exit and erase recorded readings, or press "HOLD" button to
exit but not erase recorded readings.
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TEMPERATURE
Temperature Scale:
Celsius or Fahrenheit user-selectable
Temperature Sensor:
NTC
Measurement Range:
-20°C to 60°C / -4°F to 140°F
Measurement rate:
1 times per second.
Resolution: 0.1°C/°
Accuracy: ±1.0°C
on
-20°C to 0°C, 45°C to 60°C
±0.5°C
on
0°C to 45°C
±2.0°F
on
-4°F to 32°F, 113°F to 140°
±1.0°F
on
32°F to 113°F
Air Velocity
Mounting Nut:
1/4" x 20
Operating Temperature:
Meter: 0°C to 50°C (32F to 122°F)
Vane: 0°C to 60°C (32F to 140°F)
WIND VELOCITY
Units
Resolution
Threshold
Range
m/s
0.01
0.3
0.0-30.0
ft/min
1
60
0.0-5900
knots
0.1
0.6
0.0-58.0
mph
0.1
0.7
0.0-67.0
Km/h
0.1
1.1
0.0-108.0
Accuracy: ±3%FS
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