Crowcon Tetra MO7237 Manuel d'utilisateur

TetraPersonal Multigas MonitorUser ManualM07238July 2007Issue 6

Introduction TetraI.IntroductionThank you for purchasing the new Tetra Personal Multigas Monitor. Tetra is aportable multigas detector, designed to be

allowing you to swap sensors between units or configure your unit, as appro-priate, to your current needs. Plug and play will ease maintenance time an

Operation TetraII.Operation2.1 Switch-on sequence1. Ensure the unit is in clean air.2. Switch onPress and hold the operator button until the red LED f

9Tetra Run mode2.2 Run modeThe Tetra unit will display up to four gas readings simul-taneously on the operator display screen. A typical displaywith f

TWA alarmTetra will display the TWA alarm when the 15 minute or 8hour time weighted average alarm threshold is passed fortoxic gases.2.4 Display optio

11Tetra Event loggingPeak testWhen performing a peak test, such as a vertical entry check, previousreadings can be cleared on entry to the peak displa

Batteries TetraIII.Batteries 3.1 Rechargeable batteriesRecharge time for the Li-ion batteries is less then 6 hours (less, if they are notfully dischar

(see example). In Run mode, the battery icon will display six bars whenit is full.4. Remove the lead from the charging socket and replace the protecti

Alarm indications TetraIV.Alarm indicationsTetra provides two instantaneous alarm levels for each installed sensor, desig-nated level 1 and level 2. F

Tetra Fixing accessoriesV. Fixing AccessoriesBelt clipTetra has a strong built-in belt clip located on the back of the unit. Lifting thesmall lever wi

Safety Certification:Tetra is classified to both US standards by Underwriter Laboratories and Canadian standards by CSA as suitable for use inClass 1

Flow sampling TetraVI.Flow samplingAttaching the flow adaptor plateTo perform manual sampling using Tetra, a flow adaptor plate must be fittedonto the

Tetra Flow samplingPumped instrumentsTetra’s inbuilt pump draws sample air in through the inlet nozzle of the flowadaptor plate and out through the ou

Tetra Bump Test Accessory kitThe Bump Test Accessory is a gas testing kit designed to enable bump testingof the Tetra multigas detector using a specia

4. Tetra will display a progress bar at the bottom, the names of the gassensors fitted are shown with a cross beside each. Operate the Trigger regulat

4. To abort the Calibration test press the button at any time whilst thetest is in progress.6.4 Cal/TestThis can arise if having selected and confirme

VII. Maintenance and CalibrationTetra is designed to operate almost maintenance free under most conditions.However, some small items of routine mainte

always running even in Calibration or Gas Test modes - it is essentialto use the C01874 'bellows' style flow plate. Pumped units with softwa

VIII.PC interface and softwareTetra can be connected to a PC using an infrared optical link. The Tetra unit hasan optical communication port: an IR wi

IX.i-module replacement1. Ensure you are in a non-hazardous (safe) area.Switch off the unit2. Remove any accessories, such as the flow adaptor, if fit

two quick release fixings, push the sensor mounting out the sensorplate housing, taking care to retain any seals.Installing or replacing an i-module1.

TetraPersonal Multigas MonitorContentsUnpacking ...1Quickstart guide ...

X. SpecificationDimensions 122 x 128 x 57 mm (43/4 x 5 x 21/2 inches) Weight 498 g rechargeable unit, including belt clip and4 sensors.Housing, degr

XI.Accessories and spare partsAccessory listCrowcon part number DescriptionC01841 Aspirator Plate and GasketC01846 Aspirator assembly for pumped units

S011422 0-500 ppm carbon monoxide COS011425 0-20 ppm sulphur dioxide SO2S011426 0-10 ppm nitrogen dioxide NO2S011427 0-20 ppm nitrogen dioxide NO2S01

XII. Troubleshooting guideSymptom/ Cause Actionerror messageInstrument won't switch on Flat battery. Recharge or replace battery.Pump not runni

Appendix: Limitations of sensorsSensor limitationsThe sensors used in Tetra have limitations common to all such gas sensors, andusers should be aware

UK OfficeCrowcon Detection Instruments Ltd2 Blacklands Way, Abingdon Business ParkAbingdonOxfordshire OX14 1DY United KingdomTel: +44 (0)1235 557700Fa

1Tetra UnpackingTetraPersonal Multigas MonitorThank you for purchasing the new Tetra Personal Multigas Monitor. Tetra hasredefined portable gas monito

Quickstart guide TetraQuickstart guide1. Getting startedReview your Tetra unitSwitching on your unitTetra requires little setting up, follow these sim

Tetra warm up sequencea) The unit will test thealarm LEDs, sounder,vibration alerts, andthe operator displayscreen. The soundermay be silenced bypres

Run modeYour unit is now ready to use. Below is a typical screen display showing theunit in normal gas monitoring Run mode. Familiarize yourself with

1. When the gas level returns to normal, press the operator button. Thiswill reset your Tetra unit to normal Run mode. If gas levels are still inalarm