CEL-420/460USERS GUIDEIf you want to get on and use the instruments without any backgroundinformation, skip Section 3 and go straight to Section 4.1.

10. Selecting & Changing OptionsThe OPTION operating mode contains the part of the program whichallows the following items to be checked or adjust

Repeat this process in the Date Option to change the date.10.3 Change Timer & Run Duration (CEL-460 only)

11. SpecificationI

12. CE ComplianceAll models of the CEL-420 and CEL-460 Dosimeters comply with theEMC Directive 89/336/EEC of the European Union. They have beentested

13. Intrinsically Safe ModelsFour models in the CEL-420/460 series are available with Intrinsic Safetyapproval for use in hazardous areas. Their instr

14. Instrument Servicing & WarrantyArrangementsTo ensure its conformity with the specification, this instrument isthoroughly inspected and it&apos

mended that the equipment be returned to the Service and VerificationDepartment at Bedford, where it will be inspected and entered into theICMA scheme

3. Introduction to the DosimetersThe CEL-420 and CEL-460 Noise Dosimeters measure the frequencyweighted noise exposures and peak sound levels simultan

Intrinsically safe versions are rated to EEx ia IIC T4 for use inzones 0, 1 and 2 with IS Certificate Number - Ex97E2110X tested toEN50020 (this corre

by the built-in clock. There are time-history recording capabilities that al-low up to two profiles to be saved with each dose result set in a sepa-ra

5. Perform Acoustic CalibrationOperations are performed by a sequence of key strokes.Perform a field accuracy checkeach time the instrument is switche

6. Select Measurement Setup7. Measure Dose

8. Recall Dose DataMeasurement data is stored in the DOSE operating mode and is acces-sed using the key. Current data can be inspected while the instr

8.3 Print Standard ReportWith the dosimeter switched OFF, use both the C6671 and CEL-6672 Ca-bles to connect the instrument to a Centronics printer as

9. Use as a Sound Level MeterSLM settings can be changed via the instrument keypad. Connect theCEL-425 SLM Adaptor (as described in Section 4), perfor