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2.3.7
MFC Control Option Connection
If the molbox1+ is equipped with the MFC control option, a cable and connection kit will have
been supplied with the molbox1+ accessories. Configure the cable correctly using the pinout
information provided in Section 7.3 and information from the MFC manufacturer.
2.4
Power UP and Verification
2.4.1
Power UP
Actuate the power switch on the molbox1+ rear panel. Observe the front panel display as
molbox1+ initializes, error checks, calibrates its internal ohmic measurement system and
goes to the main run screen (see Section 3.2). The top left side of the main run screen
should display a flow value near zero or <BPR HI>. If <NO BLOC> is displayed, molbox1+
has not been able to identify a molbloc connection and load molbloc information. Verify that
a valid molbloc is properly connected (see Section 2.3.3) and press [SETUP], <1molbloc> to
load the molbloc (see Section 3.5.1). If molbox1+ is still unable to identify a molbloc, the
molbloc may require reloading of EEPROM information or molbox1+ may require repair.
If the molbox1+ fails to reach the main run screen: Service may be required. Record the
sequence of operations and displays observed and contact a DHI Authorized Service
Provider (see Section 7.4).
2.4.2
Check Proper Pressure Measurement Operation
Check that the molbox pressure measurements are operating properly. Proceed as follows:
Connect the molbloc to the molbox1+ (see Section 2.3.3).
Shut off the gas supply to the molbloc and open both molbloc ends to atmospheric
(ambient) pressure.
Press [P&T] and observe the display of the pressure measured by the upstream and
downstream absolute RPTs (see Section 3.4.5).
downstream pressures. These should indicate current atmospheric pressure and be in
agreement within ± 0.02% of the nominal full scale calibrated range listed in section
1.2.2. If the two readings disagree by more than this, one or both RPTs may be out of
calibration and service may be required.
Press [ESCAPE] to return to the main run screen.
The pressure measurements indicated in the [P&T] screen are corrected
for TARE and AUTOZERO values. If the pressure readings disagree more
than the values indicated above refer to the manual sections regarding
these functions before considering calibration or service.
2.4.3
Check Proper Temperature Measurement Operation
Check that the molbox1+ temperature measurement is operating properly. Proceed as follows:
Connect a molbloc to the molbox1+ (see Section 2.3.3).
From the molbox1+ main run screen, press [P&T] twice to arrive at the temperature display
screen. Observe the temperature readings of the two molbloc PRTs (see Section 3.4.5).
If the molbloc has been in a stable temperature environment for 30 to 60 minutes, the
temperature indications should be roughly ambient temperature and the two indications
should agree within ± 0.2 °C. If the two readings disagree by more than ± 0.2 °C, there
may be a problem with the molbloc or the molbox1+ TEMPERATURE MEASUREMENT
function and service may be required.
Note
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© 1995 - 2010 Fluke Corporation, DH Instruments Division
2. INSTALLATION
Observe the upstream and
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