Extech Instruments FM200 Manuale utente

User Manual

Formaldehyde Thermo-Hygrometer

Model FM200

Additional User Manual Translations available at www.extech.com

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EXTECH INSTRUMENTS

2FM200-en-GB_V1.8 3/17

Introduction

Thank you for selecting the Extech Instruments Model FM200. The FM200 measures

Formaldehyde CH2O (HCHO) concentration, Air Temperature, and Relative Humidity. The alarm

feature alerts the user when the Formaldehyde 0.08ppm limit is exceeded.

This device is shipped fully tested and calibrated and, with proper use, will provide years of

reliable service. Please visit our website (www.extech.com) to check for the latest version of this

User Guide, Product Updates,

Features

•Measures Formaldehyde, Temperature, and Relative Humidity

•Built-in fan to quickly intake gas via pliable tube

•Pliable tube available for restricting samples

•Triple line, large LCD display

•Display Backlight function for working in dimly lit areas

•Automatic temperature compensation

•Hold function freezes current readings

•Store and recall maximum and minimum readings

•Self-calibration feature

•Auto power off after 15 minutes of inactivity conserves battery energy

•HCHO high alarm threshold setting with audible beeper

•Electrochemical sensor, capable of measuring up to 5ppm of HCHO

•Tripod mount on sensor and meter

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EXTECH INSTRUMENTS

3FM200-en-GB_V1.8 3/17

Meter Description

1. LCD Display

2. HOLD/ Up Arrow Button

3. MODE/ Left Arrow Button

4. SET Button

5. AC adaptor jack

6. Tripod mount (detachable probe also has a

Tripod mount)

7. Probe connection

8. (Power) Button

9. MAX-MIN/ Right arrow

10. UNIT Button

11. Down Arrow / Backlight Button

12. Inlet/Outlet ports for tubing

13. Detachable Probe

14. Probe LED indicators

Note: Battery compartment located on back of the meter. A tripod mounting port is available on

the back of the external probe.

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EXTECH INSTRUMENTS

4FM200-en-GB_V1.8 3/17

Operation

External Probe and Status LED indicators

Attach the External Probe to the connector at the top of the meter. The status indicators on the

Probe will flash red when the Sampling Fan is on, solid red when the Sampling Fan is off, and

green when the Probe is connected to the meter and functioning normally. The user can connect

the supplied tubing to the External Probe’s INLET/OUTLET ports. A Tripod Mount is located on

the back of the External Probe (in addition to the one at the bottom of the meter).

Powering on the meter

Short press the button to power on the meter. Alternatively, use the AC/DC adaptor to power

the meter. When powered on, the meter LCD shows “0000” for a period of time (depending on

the period of time the meter has been inactive). The meter then counts from “9999” down to

“0000”.

Once the meter reaches “0000”, the HCHO level will be shown along with the

Temperature/Humidity readings (Temperature and RH% displays alternate every 3 seconds).

Note: For short term measurements, battery power can be used. For datalogging or long term

usage, use the AC/DC adaptor to conserve battery energy.

Auto Power Off & Disable

The meter will automatically turn off after 15 minutes of inactivity. To disable the auto power off

function: with meter OFF, press and hold the HOLD button first, followed by the button. The

LCD will show “n”, and will then return to normal measurement mode.

Turning the Sampling Fan ON/OFF

Press the SET button to toggle the air sampling fan ON and OFF. When the fan is ON its motion

will generate an audible sound and a vibration.

MAX-MIN Memory

Short press the MAX/MIN button to scroll through Maximum value, Minimum value, and then

back to the normal operating mode. Press and hold the HOLD button to clear the maximum or

minimum memory values (depending on which mode is displaying) and then return to the

normal operating mode as just described. The meter will then begin recording new maximum

and minimum readings.

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EXTECH INSTRUMENTS

5FM200-en-GB_V1.8 3/17

Changing Temperature Units oC/oF

Short press the UNIT button (while the temperature is being displayed) to switch between °C

and °F units.

High Alarm with Beeper

The alarm threshold range is 0.00 to 5.00ppm. The meter defaults to a 0.08ppm HCHO alarm

threshold. To enter the alarm threshold setting mode, press and hold the SET button. Press the

HOLD / button to increase the value or press the / button to decrease the value. Press

the MODE/ button to select the digit to the left and press the / button to select the digit

to the right. Press and hold the SET button to save the changes. The LCD display will show

“SAVE” and return to its normal mode of operation.

Note: A bell icon is shown on the top left corner of the LCD display when the alarm is

armed. Short press the POWER button to arm or disarm the alarm.

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EXTECH INSTRUMENTS

6FM200-en-GB_V1.8 3/17

Hold Function

Press the HOLD button to freeze the current readings on the screen during normal measurement

mode. The HOLD icon will display when HOLD is activated. In the HOLD mode, some functions

are temporarily disabled (MAX/MIN and units selection). Press the HOLD button again to return

to normal operation.

Backlight Function

Press the / button to activate the display backlighting. Power off the meter to disable the

backlight function or press the / button again.

Self-Calibration (HCHO)

Power the meter and hold the MODE button to enter the calibration

mode. “CAL” will begin flashing on the LCD display. Note that the

calibration period is approximately 5 minutes.

IMPORTANT: Please perform the Calibration in an absolutely clean air

environment with no HCHO present.

Temperature and Humidity Offset

While the meter is off, press and hold the MODE + + + buttons all simultaneously until

the LCD shows 0.0°C and SET. Use the HOLD / button to increase the value and the /

button to decrease the value. To skip the temperature adjustment, short press the SET button.

Follow the same steps for the RH% offset. Press and hold the SET button to save the adjustment

values. The LCD will display “SAVE”. To complete the offset, reset the meter (cycle power OFF

then ON).

Note: The maximum offset ranges are ±9.9°C/F and ±9.9%RH.

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EXTECH INSTRUMENTS

7FM200-en-GB_V1.8 3/17

Maintenance

Low Battery

When the battery icon appears on the LCD, the batteries must be replaced.

In a downward motion, slide the rear battery compartment cover off of the meter housing.

Remove the old batteries and replace with new batteries (all of the same type) observing correct

polarity. This meter uses six (6) 1.5V AAA batteries.

Battery Safety Reminders

oPlease dispose of batteries responsibly; observe local, state, and national regulations.

oNever dispose of batteries in a fire; batteries may explode or leak.

oNever mix battery types; install new batteries of the same type.

Error Display Codes

The following errors may appear on the FM200.

ERR-1: Temperature or humidity sensor is damaged or sensor communication error

ERR-2: HCHO, Temperature, or humidity readings are out of range

If the sensor is subjected to a high concentration of HCHO or other sensitive chemicals listed in

the Sensor Cross Sensitivity table, it will read ERR2.

Let the sensor run for a few hours in clean air and the meter will read normal again.

HCHO Level Guidelines (for general reference only)

0.03 ppm Average outdoor level

0.10 ppm Recommend upper limit for residences by ASHRAE , ANSI, EPA, NIOSH for STEL

0.40 ppm Recommended upper limit for residential homes

0.50 ppm OSHA workplace limit

0.75 ppm OSHA TWA limit

0.80 ppm Level at which most people first detect odor

2.00 ppm OSHA STEL limit

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EXTECH INSTRUMENTS

8FM200-en-GB_V1.8 3/17

Specifications

HCHO Measurement Range 0.00 to 5.00ppm

HCHO Accuracy ±25% of reading +0.03ppm (baseline drift)

Accuracy Note: Accuracy meets NIOSH acceptance criterion within

±25% of the true value at 95% confidence level

HCHO Resolution 0.01 ppm

Temp. Measurement range 0°C to 50°C (32°F to 122°F)

Temperature Resolution 0.1°C (0.1°F)

Relative Humidity Range 10 to 90% RH

RH Resolution 0.1% RH

Temperature Accuracy ±1.0°C (2.0°F)

Relative Humidity Accuracy: ±5% (20 to 80%RH) otherwise the accuracy is ±7%

Power AAA batteries x 6 pcs or AC/DC adaptor (supplied)

Meter Dimensions 160 x 60 x 40 mm (6.3 x 2.4 x 1.6 in.)

LCD Dimensions 42 x 33.5mm (1.65 x 1.32 in.)

Weight 181.4 g (6.4 oz.)

Sensor Cross Sensitivity table

Substance

Cross Sensitivity (%)

H2S

No Data

0.1

SO2

NO2

No Data

CL2

-3

C2H4

No Data

NH3

0.0

CO2

0.0

Ethanol, methanol

Phenol

Water Vapor

0.0*

*NB: Within specified range. Step changes in %RH produce short term

transient response

ISO-9001 Certified

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