Rki-instruments NP-204 Manuel d'utilisateur

INSTRUCTION MANUALModel NP-204PORTABLE METHANE GAS DETECTORThe accompanying instrument is sold and serviced in the USA by RKI Instruments, Inc. Pleas

NP-204 RKI Instruments, Inc.Calibration Supplies and EquipmentTo adjust the NP-204, you will need the following supplies and equipment, some of which

NP-204 RKI Instruments, Inc.CautionThe combustibles measurement (low range) is flow-sensitive. Use a flowmeter and set the flow rateto 0.8 SCFH (0.4

NP-204 RKI Instruments, Inc.High Range sensorReplace the high range sensor filaments when:1. The High range cannot be calibrated correctly.2. The hi

NP-204 RKI Instruments, Inc.B. Remove the two screws holding the U shaped bracket which securesthe TC sensor filaments into the sample chamber. Remo

NP-204 RKI Instruments, Inc.Table of ContentsINTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

NP-204 RKI Instruments, Inc.INTRODUCTIONThe Model NP-204 is a proven gas detection instrument, in use internationally for detection of naturalgas lev

NP-204 RKI Instruments, Inc.DESCRIPTIONThe RKI Model NP-204 is a rugged battery operated portable instrument for detection of combustiblegas (methane

NP-204 RKI Instruments, Inc.100% Volume Gas SensorThe Volume Percent Gas sensor also consists of a filament set and wires. The filaments aresimilar

NP-204 RKI Instruments, Inc.switch is in this position the instrumentwill detect and display the high range only.2. ZERO ADJ.This adjustment is used

NP-204 RKI Instruments, Inc.OPERATIONPreparationNormally the NP-204 requires very little preparation before use. Before using the instrument, followt

NP-204 RKI Instruments, Inc.5. Verify Response (Low Range)To verify detection of combustibles use a controlled source of flammable vapor, forexample

NP-204 RKI Instruments, Inc.Zero Adj. knob.3. Generally, when testing an unknown space or sample, it is recommended to havethe range selector switch