Triplett CFM100 User manual

User Manual

CFM100

Thermo-Anemometer

Introduction

Congratulations on your purchase of the Triplett CFM100 Thermo-

Anemometer. The CFM/CMM Thermo Anemometer instrument measures

Air Velocity, Air Flow (volume) and Temperature. The large, easy-to-read

backlit LCD includes primary and secondary displays plus numerous status

indicators.

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Safety

Do not operate the meter in environments where the following are

present: explosive gases (or materials), combustible gases (or

materials), steam, or dust.

Please replace the battery immediately when the low battery symbol

appears on the LCD.

Do not touch the meter’s circuit board for any reason; static

electricity or contamination could damage the sensitive

components.

This instrument was designed for pollution

degree 2. Operation Altitude: Up to 2000m

(7000’).

Description

1.Vane Anemometer (Sensor) Input Connector

2.Vane Anemometer Sensor

3.Right Side Function Buttons (°C/F, UNITS, HOLD)

4.Left Side Function Buttons (Backlight, MAX/MIN, AREA)

5. LCD Display

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Display Overview

VEL: indicates that meter is in air velocity mode

FLOW: indicates that meter is in air flow mode

MAX (bottom of LCD): Max Hold for the Air Velocity and Air Flow

function

HOLD (bottom of LCD): Data Hold for the Air Velocity and Air Flow

function

oC / oF: Temperature units of measure

CFM/CMM: airflow units of measure

AREA(ft2, m2): units for area dimensions

m/s, ft/min, km/h, MPH, knots: air velocity units of measure

X10, X100: multipliers for air flow readings

AVG: air averaging mode

REC: indicates that min/max function is running (top for temp, bottom

for air)

Large LCD digits at bottom of display for Air Velocity and Air Flow

Smaller LCD digits at top, right of display for Probe Temperature

: :Low battery indicator

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Operation

Connecting the Vane

1. The vane plug is inserted in the meter’s sensor jack at the top of the

meter. The plug and jack are keyed so that the plug can only fit in the jack

one way.

2. Turn the plug carefully until it lines up with the jack and then firmly push

the plug in place. Do not apply undue force or try to twist the plug side-to-

side.

3. If the vane is not connected to the meter or if the sensor is defective, the

LCD display will indicate OL in place of a Temperature reading.

Air Velocity Measurements (Single Point)

1. Turn on the meter using the ON/OFF button.

2. Press UNITS button to select the desired unit

of measure. NOTE: At power up the meter will

display the last unit of measure previously

entered.

3. Place the sensor in the air stream. Ensure that

the air enters the vane as indicated by the

arrow sticker placed inside the vane.

4. View the readings on the LCD Display. The

large main LCD display shows the Air Velocity

reading. The upper right LCD sub-display

shows the temperature reading.

airflow

Arrow

Side view of Vane

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Air Flow Measurements (CMM / CFM)

1. Turn on the meter using the ON/OFF button

2. Press the UNITS button to select the desired air flow

units: CMM (cubic meters per minute) or CFM (cubic

feet per minute). NOTE: At power up the meter will

display the last unit of measure previously entered.

3. To begin entering the area in m2or ft2, press and

hold the AREA button until it beeps twice. The

leftmost digit of the bottom display will begin to flash.

4. Place the sensor in the air stream. Ensure that the

air enters the vane as indicated by the arrow sticker

placed inside the vane. Refer to the diagram. The

large main LCD display shows the Air Velocity

reading. The upper right LCD sub-display shows the

temperature reading.

The meter has 2 memory locations (1 for CFM and 1 for CMM) that can be used

to store commonly used area sizes that you can recall at anytime.

1. Press the AREA button until meter beeps twice. A memory location

number will appear in the top right of the display indicating the memory

location.

2. Use the UNITS button to change the flashing digit

Use the MAX/MIN button to move the decimal

After all of the digits are entered, press and hold the AREA button (until

it beeps twice) to save the area into memory and return to CFM or CMM

measuring mode.

airflo

Arro

Side view of

Vane

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Data Hold (Air Velocity/Air Flow)

1. While taking measurements, press the HOLD button to freeze the air

velocity/air flow reading.

2. The HOLD indicator will appear in the bottom of the LCD display.

3. Press HOLD again to return to normal operation.

MAX/MIN/AVG Record (Air Velocity/Air Flow)

This allows the user to record and view the highest (MAX), lowest (MIN) and

average (AVG) readings.

1. Press the button MAX/MIN button. The MAX indicator and RECORD

indicator along with the Max reading will appear on the LCD display and

the meter will begin keeping track of the MAX, MIN and Average values.

2. Press the MAX/MIN button again to view the minimum reading. The MIN

indicator along with the minimum reading will appear on the LCD display.

3. Press the MAX/MIN button again to view the average reading. The AVG

indicator along with the average reading will appear on the LCD display.

NOTE: Average recording will stop automatically after 2

hours, and the upper LCD sub-display will show an OFF (only

in the average mode).

4. Press the MAX/MIN button again to display current readings. NOTE: the

meter will keep recording MAX/MIN/AVG readings.

5. To clear and stop MAX/MIN/AVG recording and return to normal

operation, press and hold the MAX/MIN button until the meter beeps

twice.

Automatic Power OFF

To conserve battery life, the meter automatically turns off after 18 minutes. To

defeat this feature:

1. Turn the meter OFF.

2. Press and hold the (Backlight) key while turning the meter ON.

3. “dis APO” will appear in the display. The AUTO POWER OFF feature will

now be disabled.

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4. Note that AUTO POWER OFF is re-enabled each time the meter is turned

on.

5. Also note that AUTO POWER OFF is disabled in CFM/CMM or Average

mode.

Battery Replacement

When appears on the LCD, the 3*1.5V AA battery must be replaced.

1. Disconnect the sensor.

2. Remove the meter’s rubber protective jacket

3. Use a Phillips screwdriver to open the rear battery compartment

4. Replace the 3*1.5V AA battery

5. Close the battery compartment and replace the meter’s protective jacket

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Specifications

Air Velocity

Range

Resolution

Accuracy

m/s (meters per sec)

0.40 - 30.00 m/s

0.01 m/s

± (3% + 0.20

m/s)

km/h (kilometers/hour)

1.4 - 108.0 km/h

0.1 km/h

± (3% + 0.8

km/hr)

ft/min (feet per minute)

80 –5900 ft/min

1 ft/min

± (3% + 40

ft/m)

mph (miles per hour)

0.9 –67.0 mph

0.1 mph

± (3% + 0.4

MPH)

knots (nautical MPH)

0.8 to 58.0 knots

0.1 knots

± (3% + 0.4

knots)

Air Flow

Range

Resolution

Area

CMM (cubic meters/min)

0-999900 m3/min

0.001 to

100

0 .000 to

999.9m2

CFM (cubic ft/min)

0-999900 ft3/min

0.001 to

100

0.000 to

999.9ft2

Air Temperature

Range

Resolution

Accuracy

32 - 122oF (0 - 50oC)

0.1oF/C

4.0oF (2.0oC)

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General Specifications

Circuit Custom LSI microprocessor circuit

Display Dual function 4-digit LCD

Sampling rate 1 reading per second approx.

Sensors Air velocity/flow sensor: Conventional angled

vane arms with low-friction ball bearing

Temperature sensor: NTC-type precision

thermistor

Automatic Power off Auto shut off after 20 minutes to preserve battery

Operating Temperature 32 to 122°F (0 to 50°C)

Storage Temperature 14 to 140oF (-10 to 60oC)

Operating Humidity <80% RH

Storage Humidity <80% RH

Operating Altitude 2000 meters (7000ft) maximum

Battery (3) 1.5V AAA batteries

Battery life 40 hours approx. (if the Backlight is used

continuously, battery life will be reduced

significantly)

Battery Current 8.3 mA DC approx.

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Useful Equations and Conversions

Area equation for rectangular or square ducts

Area equation for circular ducts

Cubic equations

NOTE: Measurements made in inches

must be converted to feet or meters before using the above formulae.

Width (W)

Height (H)

Area (A) = Width (W) x Height (H)

CFM (ft3/min) = Air Velocity (ft/min) x Area (ft2)

CMM (m3/min) = Air Velocity (m/sec) x Area (m2) x 60

Radius

Area (A) = x r2

Where = 3.14 and r2= radius x

radius

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