User guide

15
IM 11M06D03-01E-A
VII. SETUP PROCEDURES, AC1
Locatethereferenceairowmeters,andadjusttheowadjustmentknobsasoutlinedbelow:
Reference Air: 0.8 LPM
CalibrationGas:0.6LPM
The maximum working pressure of the MC1 and AC1 unit is 35 psi. Excessive pressure can damage the Zirconia
cell of the ZR22G Oxygen Probe.
7.1 INITIAL FLOW RATE SETUP
EnsurethatthecalibrationgasandreferenceairlinesareproperlyplumbedtotheleftsideoftheAC1AutoCalUnit.The
zerogasandinstrumentairshouldbesetatapproximately20psi(±2psi).Powerisnotrequiredtosettheowrates.
7.1.2 SETTING THE REFERENCE AIR FLOW RATES
Locatethereferenceowmeters.AdjusttheowadjustmentknobontheREFERNCEAIRFLOWMETERto0.8LPM
or800ml/min.
7.1.3 BALANCING PRESSURE DROPS IN THE CALIBRATION LINES
Foraccuratecalibrations,theautocalsystemmustprovideaxedowofZerogasandSpangas.Tobalancethe
pressuredropsperformthefollowingsteps:
1) LocatetheBLOCKandSPANGASSOLENOID.Usingascrewdriver,turntheoverridescrewtothemanual
position. See Figure 5.2
2) UsetheowregulatorknobontheCALGASFLOWMETERtoadjusttheowto1.0LPM.
3) SwitchtheoverridescrewoftheSPANGASsolenoidtoAUTO.
4) TurntheoverridescrewfortheZEROGASsolenoidtoMANUAL.
5) Adjustthepressureregulatoronthezerogascylinderforaowof1.0LPMontheCalibrationGasowmeter.
DONOTUSEtheowregulatorknoboftheowmetertoachievethisowlevel.
6) AdjusttheowregulatorknobontheCalibrationGasowmeteruntiltheowmeterreads0.6LPM.
7) VerifythatallthemanualoverridesaresetbacktoAUTO.
7.2 STANDARD OPERATION
 • TheReferenceAirFlowmeterindicates0.8LPMduringnormaloperationandcalibration.
 • AllmanualoverridesaresettotheAUTOposition.
 • TheCalibrationGasowmeterwillshowaowof0.6LPMduringCalibrationonly.
Before considering your calibration unit automated, it is good practice to check for leaks along the full distance of
thecalibrationlinetubing,inadditiontoperformingaCALCHECKtoconrmthatthegasesareplumbedcorrectly
to each probe.
CAUTION
CAUTION