Ludlum Measurements 4906AB Manual

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Model 4906AB System Checkout
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1. Prerequisites
a. Assembly
i. The procedure presented here is for the checkout of a fully assembled Model
4906AB Hand and Foot Monitor. Before performing this procedure, ensure the
unit is fully assembled.

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b. Power Supply
i. Verify that the Model 4906AB unit is connected to the required power supply.
Reference the Model 4906 Operator’s Manual for power specifications.
c. Gas Supply
i. Verify the Model 4906AB unit is connected to the required detection gas supply.
Reference the Model 4906 Operator’s Manual for gas type and flow specifications.
d. Firmware
i. Ensure all programmable circuit boards have been loaded with the latest revision of
the appropriate firmware. All circuit boards are programmed at the factory and do
not require new programming unless installing an update and instructed to do so by
LMI personnel. Circuit boards that require a firmware download are listed below.
•Host Board - Main and peripheral microcontrollers
•Hand and Foot Detector Boards – Main microcontroller
•Frisker Detector Boards – Main and peripheral microcontrollers
•Gas Control Board – Main microcontroller
e. Detector Board Voltage Calibration
i. All detector boards being checked out must have successfully completed a detector
board voltage calibration before completing this procedure. This calibration is
performed at the factory and does not need to be repeated unless detector board
malfunction is suspected or detector board voltage calibration data is cleared.
f. SBC Software
i. The SBC (Single Board Computer) that is the primary controller for the Model
4906AB must have all required software and drivers installed prior to completion of
this procedure. Required software is listed below.
•SBC operating system
•USB-to-serial cable drivers
•Monitor drivers (applicability based on monitor type)

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2. Needed Equipment
a. Keyboard
i. To perform the Model 4906AB Hand and Foot Monitor system checkout
procedure, a USB keyboard is recommended for software interface and data entry.
3. Visual Inspection
a. Physical Damage
i. Perform a thorough visual inspection for physical unit damage. Take particular note
of displays, covers, wires, indicator lights, and sensors. Superficial damage should
be corrected as needed. Damage that may cause functional problems must be
corrected before proceeding.
b. Serial Numbers
i. Verify each detector (Left Hand Back – LHB, Left Hand Palm – LHP, Right Hand
Back – RHB, Right Hand Palm – RHP, Left Foot – LF, and Right Foot - RF) is
clearly marked with a serial number. This requires the opening of detector covers.
The hand detector covers allow access to all hand detectors (one cover for both left
and right sides), the foot cover allows access to both left and right foot detectors,
and frisker serial numbers can be viewed on the mounted frisker probe. Opening
the hand cover requires a flathead screwdriver. Serial numbers should be expected
in a form similar to PRXXXXXX (example PR207281) for all detectors.

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ii. Verify the Model 4906AB Unit is marked with a unit serial number. This number is
stamped into the Power IO Panel located on the lower side portion of the column.
The number is in the format XXXXXX (example 344628).

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4. Power ON/OFF Test
a. The following power on/off tests are used to verify the Model 4906AB power
cycle functions are working correctly.
b. Power ON with Power Button
i. Power on the unit by pressing and releasing the POWER/RESET button located
on the power IO panel.
ii. Verify the following sequence occurs.
•The frisker clicking noise may be heard if a frisker is equipped.
•The yellow light stack light illuminates.
•The unit display screen turns on to display the SBC boot sequence, followed by
the operating system startup, and finally the Model 4906AB Supervisor
Operate (Main) screen.
a. Power OFF with Power Button
i. Power off the unit by pressing and releasing the POWER/RESET button.
ii. Verify the following sequence occurs.
•The Model 4906AB Supervisor software closes.
•The operating system shuts down.
•All light stack lights extinguish.

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5. Software Serial Number Verification
a. To ensure reported accuracy and detector traceability, the serial number on
each detector must be verified to match the serial number entered into the
Model 4906AB Supervisor software for the appropriate position. If the
detector serial numbers have not yet been entered in the software, enter the
serial numbers at this time.
b. Navigate to the Setup menu by selecting the Setup button on the Operate
(Main) screen. Enter the high-level password (default = 2222) and select the
Enter button.
c. Next, select the Detectors button to open the Detectors screen and navigate
to the General tab. Verify/enter the detector serial numbers and click the
Save button.

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d. If equipped with a frisker, the frisker serial number must be verified to match
the serial number entered in the Supervisor software, or it must be entered if
this has not yet been done.
e. From the Setup menu, select the Frisker button to bring up the Frisker screen.
Select the Detector tab and verify/enter the frisker serial number and click the
Save button.
f. In addition to detector serial number entry, the whole unit serial number must
be verified to match the serial number entered in the Supervisor software, or
entered if this has not yet been done.
g. From the Setup menu, select the Operational button to bring up the
Operational Setting screen. Select the General tab and verify/enter the Model
4906AB unit serial number and click the Apply button.

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