A-3
box door not sealed properly. Straighten or replace the hose, replace the filter as necessary to restore
normal airflow, remove excess desiccant material, tighten desiccant door, or remove debris from
desiccant door seal.
h.
While in CHECK Mode, rotate the alarm point potentiometer completely counter-clockwise to zero.
When the alarm potentiometer is changed, a pop-up alarm point screen shows the setpoint value. The
pop-up alarm point screen MUST be allowed to close (approximately three seconds with no change)
and return to the check screen in order to save the new alarm point value.
i.
If the check screen shows a failure condition, and then fix the condition highlighted on the screen
before continuing. If the check screen shows OK, rotate the MODE switch to the MEASURE position.
A.1.3 Computer Connection.
a.
Assuming the interface software has been previously loaded on your PC, connect the USB-to-serial
adapter to the test the computer; next connect the other end of the calibration cable to the Model 3100
9-pin “D” connector. Refer to the software manual for further information.
b.
Pull up the Model 3100 software program on the computer. The first thing you should see when the
program loads will be a selector box. Choose the “Model 3100” as the instrument choice. The second
screen will be a small dialogue box entitled, Select Device Serial Number, in front of the main
program screen. This refers to the USB adapter, which is now plugged into the USB port of your
computer.
c.
Confirm that the serial number displayed in the software matches the instrument’s serial number. If it
does not, correct it. (If correcting the instrument serial number is not necessary, skip the remainder of
this section and proceed to the Section A.1.4 Pressure Calibration to continue.)
d.
Once the serial number is corrected, tab over to the next field to get to the Update button on the lower
right-hand corner to turn pink. Press the Update button to save the correction just made.
e.
Do a Ctrl + R (press the Ctrl key followed by the R key) to reload all data. This is to confirm that the
correction just made to the serial number has been saved correctly.
A.1.4 Setting the Board ADC Offset and Pressure Calibration.
a.
The following steps b. through m. may be skipped if the unit has been previously calibrated and no
repairs have been made.
b.
From the computer, enter the BOARD ADC VALUE into the Board ADC Offset box. This shall be
less than 0.050
. If the BOARD ADC VALUE is greater than 0.050, repeat step A.1.2.h.
c.
Obtain the current atmospheric pressure reading. If the pressure reading is in “inHg” (inches of
mercury), convert the pressure reading from inHg to kPa by multiplying the pressure reading by
3.3864. (Example: If the pressure reading on a weather station reads 27.67 inHg, multiply this by
3.3864 to get 93.701688. The number to use in this example is 93.70.)
d.
The Pressure Calibration button must be selected. Before pressing it, open the Model 3100 can by
turning the four latches. Locate a small black surface mount component at the top edge of the circuit
board. This is called the “pressure sensor.” Take the vacuum pump hose and attach it to this part.
Note: Take special care that you do not pull or cause the vacuum line to slip off of this component. If it comes off
during the next set of steps, you will have to start your pressure calibration over again in order to do it correctly.
e.
Squeeze the trigger slowly until you drive the needle on the vacuum pump gauge to -10 inches of
mercury (10 inHg). If you do go past the -10 value, slightly pull on the release valve until you either
settle back over -10 or slightly under where you can increase by pulling on the trigger.
Содержание 3100
Страница 1: ...LUDLUM MODEL 3100 TRITIUM IN AIR MONITOR July 2019 ...
Страница 2: ...LUDLUM MODEL 3100 TRITIUM IN AIR MONITOR July 2019 ...
Страница 11: ...1 2 Figure 1 2 Front View Model 3100 ...
Страница 31: ......
Страница 34: ......
Страница 35: ...5 3 Figure 5 5 Rotary Draw Latches Detail View BF Figure 5 6 Rack Mount Safety Strap ...
Страница 36: ......