User Manual
Formaldehyde (HCHO or CH20) and Total
Volatile Organic Compounds (TVOC) Tester
Model VFM200
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Introduction
Thank you for selecting the Extech Instruments Model VFM200. The VFM200 measures HCHO
(formaldehyde) and TVOC (Total Volatile Organic Compounds).
Potential sources for TVOCs include paints, finishes, adhesives, cigarette smoke, pesticides,
personal care products, car exhaust, new furnishings, wall coverings, household cleansers, and
cooking fuels. Chemicals include: Acetone, Ethylene Glycol, Formaldehyde, Xylene, 1,3 butadiene,
Tetrachloroethene, Hydrogen Sulfide, Ammonia, Toluene, Benzene, Methylene Chloride,
Perchloroethylene, and MTBE.
This device is shipped fully tested and calibrated and, with proper use, will provide years of reliable
service. Please visit our website to check for the latest version of this User
Guide, Product Updates, and Customer Support.
Features
Fuel Cell Formaldehyde Sensor Technology
High accuracy measurements
Backlit LCD display
Real time display of HCHO (formaldehyde) concentration in air
Real time display of TVOC (Total Volatile Organic Compounds) concentration in air
Two unit selections (PPM, mg/m³)
Audio visual High and Low Alarms for HCHO
Auto power off
Description
METER DESCRIPTION
1. HCHO sensor (front)
2. AC Adaptor jack (under flap)
3. Down arrow and Alarm Setup button
4. Battery compartment (rear)
5. ON OFF button (also used in Alarm Setup)
6. Up arrow and UNIT selection button
7. Backlit Display
8. TVOC sensor (rear)
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2
3
8
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6
5
4
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LCD DISPLAY
1. HCHO reading
2. TVOC reading
3. Selectable units of measure
4. Alarm Beeper symbol
5. Auto Power OFF reminder
6. Rechargeable Battery status
7. High and Low Alarm symbols
mg/m
mg/m
Operation
POWER THE METER
Press the button to turn on the meter. The battery symbol informs the user as to the battery
strength. Connect the battery charger to recharge the battery. Long press the button to
power off. The LCD will count down: 3, 2, 1, then OFF before switching off.
AUTO POWER OFF
The meter will switch off after 30 minutes of inactivity. Press any function button to prevent the
meter from powering off; the auto power off timer will be then be reset. The APO display
symbol reminds the user that Auto Power OFF is always active.
GERNERAL USE
All LCD display lines will switch ON when power is applied to the meter. The bottom TVOC
display will count down from 10 seconds or from 90 seconds (depending on the
environment) to zero. When countdown is complete the meter is ready for use.
In normal mode, the top display indicates the HCHO concentration in PPM or mg/m³. The
bottom display indicates the TVOC concentration in PPM or mg/m³.
Use the UNIT button to switch units between PPM and mg/m³.
With the meter on, if the measured HCHO concentration exceeds the high or low user
programmable Alarm thresholds, the LED display will flash red in color and the audible
beeper will sound (unless it has been disabled with the SET/ button). Press SET/ to
silence the alarm beeper (when it is sounding) or to disable the beeper entirely. When
disabled, the displayed beeper symbol is switched off.
ALARM SETUP (HCHO only)
Low Alarm Setup
1. Long press the SET/ button to enter the setup mode.
2. The low alarm icon will display and the LCD will show the low alarm threshold.
3. Use the and buttons to adjust the low alarm threshold.
4. Press the button to go to the high alarm setup screen.
High Alarm Setup
1. Use the and buttons to adjust the high alarm threshold.
2. Press the button to return to the normal measurement mode.
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CONTROL BUTTONS
1. Short press the SET button to silence the beeper (when it is sounding) or to
disable/enable the alarm beeper. This button is also used as a down arrow to change the
high and low Alarm threshold values in the Alarm Setup mode.
2. Long press the SET button to enter the Alarm Setup Mode (See Alarm Setup section).
3. Short press the UNIT button to change the unit of measure (PPM or mg/m³) or to use it
as an up arrow to set the alarm threshold values in the Alarm Setup mode.
SAFETY
Do not store or use the instrument in an environment where corrosive gas is present.
Do not obstruct the sensors when in use.
Use only the supplied lithium ion battery to power the meter.
Use only the supplied AC adapter/battery charger to charge the lithium ion battery.
BATTERY CHARGE and REPLACEMENT
1. When the battery requires charging, plug the supplied battery charger into the meter (left
side, under flap) and to a source of AC power. A full charge requires 2 hours.
2. To replace the battery, open the rear battery compartment and replace the Polymer
lithium ion battery (7.4V 1300mAh). Re assemble the meter before use (part# VPC BATT)
Battery Safety Notes: Please dispose of batteries responsibly; never dispose of batteries in a fire,
batteries may explode or leak. If the meter is not to be used for 60 days or more, remove the
battery and store separately.
Never dispose of used batteries or rechargeable batteries in household waste.
As consumers, users are legally required to take used batteries to appropriate collection
sites, the retail store where the batteries were purchased, or wherever batteries are sold.
Disposal: Do not dispose of this instrument in household waste. The user is obligated to take end of
life devices to a designated collection point for the disposal of electrical and electronic equipment.
CLEANING AND STORAGE
Periodically wipe the case with a damp cloth and mild detergent; do not use abrasives or solve
nts. Please remove the battery if the meter is stored for a long period of time.
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Specifications
Sensor Professional Fuel Cell technology
HCHO Range 0.00 to 5.00 mg/m³ (or PPM)
HCHO Resolution 0.01 mg/m3 (or PPM)
HCHO Basic Accuracy ±5% FS
TVOC Range 0.00 to 9.99 mg/m³ (or PPM)
TVOC Resolution 0.01 mg/m³ (or PPM)
TVOC Basic Accuracy ±5% FS
Response Time 2 seconds
Operating Temperature 0°C to 40°C (32 to 104°F)
Storage Temperature 10°C to 60°C (14 to 140°F)
Power Supply Rechargeable Polymer lithium ion battery (7.4V 1300mAh)
Battery Charge Time Approx. 3 hours with AC adapter
Battery 7.4V 1300mAh (part # VPC BATT)
Dimensions 165 x 60 x 25mm (6.5 x 2.4 x 1.0 in.)
Weight 584g (20.6 oz.)
Copyright © 2016 FLIR Systems, Inc.
All rights reserved including the right of reproduction in whole or in part in any form
ISO 9001 Certified
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