Fluke Biomedical 10100AT - Manual (Page 29)

Operation
Basic Measurement Techniques
2
2-11
Never connect a coaxial-BNC type cable to the
Model 35050AT Dosimeter's triaxial ion chamber
input connector. Doing so may damage the ion
chamber input connector.
Always power-up the Model 35050AT Dosimeter first and power it down last. Both instruments may now
be turned on.
kVp Divider Battery Check
With the Model 35050AT Dosimeter turned on, set the function selector of the Model 35080/80A/80B kVp
Divider to the BAT CHK position. The kVp divider battery measurement screen will be displayed by the
dosimeter. A battery voltage display between 7 and 9.6 volts will carry an advisory of OK with it. Below 7
volts, LO will be indicated. If a kVp value is displayed in the BAT CHK position, the battery is indeed
exhausted. Since the kVp divider is not under control of the readout, the operator must remember to
check battery voltage manually.
Filter Pack Selection & Verification
Select an appropriate kVp filter pack for the x-ray machine
involved and plug it into the Model 35080/80A/80B kVp Divider.
Position the kVp dividers long dimensional axis at right angles
to the x-ray tube axis, to avoid "heel" effect. The filter pack area
can be placed as close to the beam axis as the ion chamber
allows. Neither the ion chamber nor the kVp divider should
shadow the other.
Pushing DETECTOR SELECT should display the name of the
filter pack installed on the kVp divider. If it does not, scroll
through the filter packs until it does.
Filter packs should not be exchanged between kVp
dividers. Each instrument and its filter pack(s) have
been carefully calibrated together as a unit. Always
check the calibration sheet serial numbers against the
actual combination. A mismatch can impact
measurement accuracy.
CAUTION
NOTE
T U B E
A X I S
X - R A Y
T U B E
T E S T
S T A N D
B E A M
L O N G
A X I S
O F
3 5 0 8 0
T O 3 5 0 5 0 A
3 5 0 8 0 / 8 0 A / 8 0 B
9 6 0 3 5 B
I O N
C H A M B E R
Figure 2-3. The Model 35080/80A/80B kVp
Divider and Ion Chamber X-ray
Shot