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PPM–400ST Formaldehyde Meter
3 Parameter IAQ Monitor
Operation Manual
www.ppm-technology.com
PPM Technology Ltd • Cibyn Industrial Estate • Caernarfon • Gwynedd • LL55 2BD • Wales • UK
Telephone: +44 (0)1286 676 999 • Fax: +44 (0)1286 671 811 • E-mail: info@ppm-technology.com
Registered in Wales: 3743347 • VAT Number: GB 713 750 842 • ISO 9001 2015 Registered Firm
Amended: Sep 2018 • Issue: 4.7
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Table of Contents
Summary of Contents for PPM Technology PPM–400ST
- Page 1 Operation Manual www.ppm-technology.com PPM Technology Ltd • Cibyn Industrial Estate • Caernarfon • Gwynedd • LL55 2BD • Wales • UK Telephone: +44 (0)1286 676 999 • Fax: +44 (0)1286 671 811 • E-mail: info@ppm-technology.com Registered in Wales: 3743347 • VAT Number: GB 713 750 842 • ISO 9001 2015 Registered Firm...
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Page 2: Table Of Contents
PPM–400ST Formaldehyde Meter Operation Manual TABLE OF CONTENTS 1 INTRODUCTION 1.1 Initial Receipt of the PPM–400ST Formaldehyde Meter 1.2 General Description 1.3 Instrument Features 2 TECHNICAL INFORMATION 2.1 Principle Of Operation 2.2 Interference 3 USING THE PPM–400ST FORMALDEHYDE METER 3.1 Taking A Sample 3.2 Sensor Recovery Period 4 CALIBRATION CHECK AND ADJUSTMENT 4.1 General Information... -
Page 3: Introduction
PPM–400ST Formaldehyde Meter Operation Manual 1 INTRODUCTION The PPM–400ST Formaldehyde Meter is an easy-to- use, hand held, three-parameter, indoor air quality monitor designed for the rapid measurement of airborne formaldehyde levels, along with temperature and humidity readings. The monitor is capable of displaying formaldehyde readings in both parts-per- million (ppm) and milligrams-per-cubic metre (mg/ ) and has built-in data analysis functions to... -
Page 4: Initial Receipt Of The Ppm-400St Formaldehyde Meter
PPM–400ST Formaldehyde Meter Operation Manual 1.1 Initial Receipt of the PPM–400ST Formaldehyde Meter Your PPM–400ST Formaldehyde Meter has been packaged carefully and includes all the components necessary for full operation. Immediately upon receipt, please examine the kit contents carefully to ensure that you have received the items listed below and that they are all in good condition. - Page 5 PPM–400ST Formaldehyde Meter Operation Manual Important points It is important that you are aware of the following points when using the instrument: The PPM–400ST Formaldehyde Meter temperature compensated to operate most accurately in the range 15–29°C and 40–60%RH. The results obtained with...
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Page 6: Instrument Features
PPM–400ST Formaldehyde Meter Operation Manual 1.3 Instrument Features Fig 1.1 Instrument Diagram Sampling Port The brass sampling port is the inlet through which the sample is drawn into sensor. Battery The battery compartment is located beneath a cover Compartment at the rear of the instrument. See Section 6.1 for guidance on battery replacement. - Page 7 PPM–400ST Formaldehyde Meter Operation Manual Display The LCD shows the formaldehyde concentration and also text messages during certain operations: ---- Sensor recovering 0.00 Sensor ready Sampling ALt= Alternative result Taking calibration sample Set calibration level Replace battery Fuel cell needs hydrating …...
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Page 8: Technical Information
PPM–400ST Formaldehyde Meter Operation Manual 2 TECHNICAL INFORMATION 2.1 Principle of Operation Electrochemical The PPM–400ST Formaldehyde Meter uses proven Formaldehyde electrochemical sensing technology for determining Sensor the concentration of formaldehyde in air samples. The instrument contains a formaldehyde sensor formed from two noble metal electrodes and a suitable electrolyte. - Page 9 PPM–400ST Formaldehyde Meter Operation Manual A list of common chemicals that can cause interference can be found in Appendix C or from the manufacturer on request. Phenol & The presence of phenol in the air can also cause Resorcinol cross-interference PPM–400ST Formaldehyde Meter.
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Page 10: Using The Ppm-400St Formaldehyde Meter
PPM–400ST Formaldehyde Meter Operation Manual 3 USING THE PPM–400ST Formaldehyde Meter 3.1 Taking a Sample Power on Press the % button once to turn the instrument on. The following display will flash ---- for 3 seconds as the instrument checks the sensor background. After this a steady 0.00 display indicates that the instrument is ready to take a sample. -
Page 11: Sensor Recovery Period
PPM–400ST Formaldehyde Meter Operation Manual 3.2 Sensor Recovery Period Sensor Clearing Between samples the instrument should be left switched off to allow the sensor to clear of any residual formaldehyde. As a general rule, the higher the reading obtained, the longer it takes for the sensor to clear. -
Page 12: Calibration Check And Adjustment
PPM–400ST Formaldehyde Meter Operation Manual 4 CALIBRATION CHECK AND ADJUSTMENT Please read this section thoroughly. Users are strongly advised to familiarise themselves with the instrument before attempting to adjust the calibration and should follow the instructions carefully. 4.1 General Information Check Calibration Instrument sensitivity can change gradually over time Regularly... -
Page 13: Calibration Check Procedure
PPM–400ST Formaldehyde Meter Operation Manual To reduce the effect of body temperature the Calibration Standard should only be handled by the yellow end caps. The Calibration Standard and instrument should always be allowed to stabilise within the sampling environment for at least one hour before use. Calibration Each Calibration Standard may be used for either a Standard Expiry... -
Page 14: Calibration Adjustment Procedure
PPM–400ST Formaldehyde Meter Operation Manual from the instrument. Replace the end plugs in the Calibration Standard securely. 5. Wait sample complete concentration to be displayed. Refer to Section 3.1 for details. 6. Refer look-up table printed Calibration Standard and use the thermometer reading to find the expected concentration. - Page 15 PPM–400ST Formaldehyde Meter Operation Manual ensure a good seal around the instrument nozzle apply gentle pressure to Calibration Standard against the instrument when taking a sample. 4. Simultaneously press both > and < buttons. The pump will be heard drawing a vapour sample and the screen will briefly show CAL .
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Page 16: Additional Features
PPM–400ST Formaldehyde Meter Operation Manual 5 ADDITIONAL FEATURES 5.1 Temperature & Humidity Sensor Reading the Current 1. Hold down the $ whilst turning the instrument on. Temperature & The display will show HEAt, release all the buttons. Humidity 2. The instrument will then... -
Page 17: Limit Setting
PPM–400ST Formaldehyde Meter Operation Manual 5.2 Limit Setting This setting governs how quickly the instrument takes to clear before another sample can be taken. The default limit setting for the PPM–400ST Formaldehyde Meter is “1”, which means that the fuel cell must be very stable before the instrument allows the user to take another sample. -
Page 18: Data Retrieval
PPM–400ST Formaldehyde Meter Operation Manual Default setting for PPM–400ST Formaldehyde Meter. Limit 1 : Lt=1 Glutaraldemeter ® mode – do not use. Limit 2 : Lt=2 Used if the PPM–400ST Formaldehyde Meter is Limit 3 : Lt=3 regularly sampling concentrations of formaldehyde in excess of 2ppm, allowing the instrument to sample at more regular intervals than if the default Limit Setting were used. - Page 19 PPM–400ST Formaldehyde Meter Operation Manual desired sample reading. 5. Press the $ button to view the saved concentration in mg/m rather than ppm. The display will change from run to ALt to confirm this. 6. Press and hold the % button to exit the display mode and turn the instrument off.
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Page 20: Maintenance
If you find that your instrument requires service or repair, please contact PPM Technology or your local dealer. Cleaning the On no account should the PPM–400ST Formaldehyde Instrument Meter be immersed in liquid. -
Page 21: Troubleshooting
If the initial value or the rate of change was in excess of 0.300 then it is likely that your sensor has been damaged – contact PPM Technology or your dealer for further details, otherwise continue with the instrument still in the tESt mode: 1. - Page 22 5.0 then there may be a problem with the sampling system or the sensor. Contact PPM Technology or your dealer for further details. Known as 'Low Time To Peak', this is due to the Display Shows ttp internal electrochemical fuel cell having dried out.
- Page 23 Step 3 above and recalibrate the PPM– 400ST. If the instrument is still displaying this message, please contact PPM Technology for further help. Checking 1. Hold down the < button whilst turning the Calibration Gain instrument on.
- Page 24 SEt and CAL message each time it's turned on. This warning will be removed when the instrument is correctly calibrated, refer to Section 4.4. If, after a Re-Set, you are still experiencing problems contact PPM Technology or your distributor to arrange a service.
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Page 25: Accessories
PPM–400ST Formaldehyde Meter Operation Manual 8 ACCESSORIES Mounting Systems Several options mounting PPM–400ST Formaldehyde Meter are available, including a desk mount for display purposes, and a wall mount for more permanent monitoring. Rubber Sleeve Protective case. “Blue Boot” For more details on these and other accessories please contact Technology... -
Page 26: Warranty
Suzhou Stanford Limited. All shipment charges should be pre-paid when returning products to PPM Technology Limited or Suzhou Stanford Limited should... -
Page 27: Appendices
UK, at the end of their lifetime. Please note that the “crossed out wheelie bin” symbol is displayed on all our electrical equipment. PPM Technology Ltd. WEEE from the UK should be returned to PPM Technology for suitable disposal. Restriction... - Page 28 A wide range of suspected interfering gases have been tested, including (NH3, CO, CO2, NO2, Acetone & Isobutylene), and the table shows only those which caused interference below LEL levels at 25°C. Unless noted otherwise all responses are linear. Compiled by PPM technology Ltd. for Formaldemeter sensor, February 2015.
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