Dwyer Instruments VT-300 Operating Manual
Model VT-300 Miniature Vane Thermo-Anemometer
9V DC
POWER PORT
1/8˝ RS232
PORT
3
/4
[
19.05]
5
1/64
[
20.13]
P
S/2
P
LUG
TELESCOPING
1
-23/64
[
34.73]
3
-21/64
[
84.53]
Specifications - Installation and Operating Instructions
etracted
R
xtended
E
Bulletin TE-VT-300
“L”
1-27/32˝ (301 mm)
1
8-1/4˝ (946 mm)
1
The Model VT-300 Miniature Vane Thermo-Anemometer measures air velocity,
ir volume, temperature, and humidity inside air ducts. This meter includes a
a
elescoping vane probe that is only 0.7˝ (18 mm) in diameter that allow s duct
t
traverse measurements up to 20˝ ducts. User-selectable units include ft/min, m/s,
knots, mph, and km/hr. The vane probe has a built-in sensor to record temperature
in °F or °C, as well as humidity in %RH. There are three modes which include
viewing data in real time, manual recording, and automatic recording. Model VT-300
can store measurements that can later be transferred to a PC via RS-232
communication. The vane probe is detachable for easy replacement, if necessary,
or as an addition to Model 9671. Each unit is supplied with a hard carrying case,
batteries, logging software CD, USB to RS-232 cable and instruction manual.
BATTERY INSTALLATION
Model VT-300 requires (4) AAA batteries for use. To install or replace batteries,
open the back compartment and remove the current batteries, if applicable. Insert
new batteries, being aware of correct polarity.
The battery icon will appear on the LCD when the power is low and the batteries
will need to be replaced.
METER SETTING
Before measuring, check the meter setting to confirm that the basic settings of the
meter are what is needed (change them if necessary). To enter the settings
function from the welcome screen, press F4 (SET).
To change settings:
1. Press the arrow buttons to shift between the variable settings.
2. Press F2 (EDIT) to enter modification mode. If the setting changes using
numbers, press the corresponding number on the keypad.
3. Press F4 (NEXT or BACK) to enter the next or previous page.
4. Press F1 (EXIT) to return to the main menu.
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: 219/872-9057 e-mail: info@dwyermail.com
SPECIFICATIONS
AIR VELOCITY
Range: 98.4 to 3937 ft/min (0.5 to 20 m/s).
Accuracy: ±3% of reading + 0.2 m/s.
Resolution: 0.1 m/s.
Response Time: 1 s.
TEMPERATURE
Range: -4 to 140°F (-20 to 60°C).
Accuracy: ±1°F (±0.6°C) from -4 to 122°F (-20 to 50°C); ±2.2°F (±1.2°C) from
122 to 140°F (50 to 60°C).
Resolution: 0.1°F (0.1°C).
Response Time: 60 s (typ).
RELATIVE HUMIDITY
Range: 0.1 to 99.9% RH.
Accuracy: ±3% RH at 25°C (10 to 90% RH); ±5% RH (0.1 to 10% RH, 90 to
99.9% RH).
Resolution: 0.1% RH.
Response Time: 60 s (typ).
AIR VOLUME
Range: 0 to 99,999 (CFM or m
Resolution: 0.1 (0 to 9999.9) or 1 (10,000 to 99,999).
WET BULB
Range: -7.6 to 158°F (-22 to 70°C).
Resolution: 0.1°F (0.1°C).
METER
Temperature Limits:
Operating: 32 to 122°F (0 to 50°C);
Storage: -4 to 122°F (-20 to 50°C).
Humidity Limits:
Operating: <80% RH;
Storage: <90% RH.
Display: 1 x 1.8˝ (26 x 45 mm).
Serial Communications: 9600 bps, 8 data bits, no parity.
Power Requirements: (4) AAA 1.5 V alkaline batteries, included, user
replaceable.
Battery Life: 100 hours.
Vane Diameter: 0.7˝ (18 mm).
Weight: 7.41 oz (210 g).
3
/s).
Phone: 219/879-8000 www.dwyer-inst.com
On the display menu, the variable settings are:
LCD Brightness: 5=brightest
•
Auto Off Function: selectable from 1 to 20 min; Auto Off is also enabled/disabled
•
rom this screen.
f
n the settings menu, the variable settings are:
O
• Date/Time Format: Choose MM-DD-YY, DD-MM-YY, or YY-MM-DD and set the date
and time.
• ID: Enable/disable the use of an ID and set the ID.
PERATION
O
here are three measurement modes:
T
. Single Measurement (MEAS)
1
2. Manual Logging (MEM)
3. Automatic Logging (LOG)
ingle Measurement
S
he single measurement setting allows for measurement without recording any
T
emory. To get to this setting:
m
. Turn on the meter.
1
2. Press F1 (MEAS).
3. Hold the vane probe in the area being measured.
On the logging menu, the user can choose which items the meter will record and
which unit will be used. The available units are:
• Air Velocity (V): MPH, MPS, FPM, KNT, KMH
• Temperature (T): °C, °F
• Relative Humidity (RH): %
• Wet Bulb Temp (WBT): °C, °F
• Air Volume (VOL): CFM, CMM
In this setting, it is also possible to calculate air volume. To do this from the single
measurement screen, press F2 (INPUT). This screen gives three options of how to
input the area.
1. For a rectangular area, press F2 (LXW) and input the length and width of the area.
2. For a circular area, press F3 (D) and input the diameter of the area.
3. If the exact area is known or can be approximated, press F4 (AREA) and input the
area manually.
Loading...