Fluke Biomedical 06-526 - Manual (Page 10)

Nuclear Associates 06-526 & 06-526-2200
Operators Manual
2-2
c. Select the external detector (EX DET) position if using the remote ion chamber (part number
6000-528). (Other ion chambers may be read if the proper connection is made. The RAD-
CHECK PLUS provides a 270 V chamber bias for this purpose.)
When the rear panel switch is set to the EX DET
position, the display must be reset, using the front
panel button, after each exposure. The internal ion
chamber is still connected when the switch is set to
the EX DET position. Be sure to keep the internal
ion chamber out of the radiation beam when using
an external chamber.
4. Using the collimator light field, adjust the field size to 6 inch (15 cm) in diameter (i.e. the size of the
RAD-CHECK PLUS case).
5. Position the instrument so that the primary beam is centered on, and perpendicular to, the detector
(represented by the black disk on top of the unit). For under-table tubes, invert the RAD-CHECK
PLUS so that the detector faces the x-ray tube.
6. Press the RESET button to zero the display; make the x-ray exposure.
It is not necessary to press the RESET button when
the rear panel switch is in the AUTO position.
7. Read the exposure in roentgens (R). To minimize drift effects, readings should be recorded
immediately.
If the display does not update, and the unit is in the
AUTO mode, press the front panel RESET button.
Select a higher kVp or mA, or use the manual reset
mode, and make another exposure.
Figure 2-1. Rear Panel
NOTE
NOTE
CAUTION
CAUTION: TURN OFF
POWER SWITCH BEFORE
REPLACING BATTERY.
USE MN1604 OR EQUIV.
ALKALINE BATTERY.
136058
REMOTE
CHAMBER HV
ZERO
INTER (MAN)
INTER (AUTO)
EX DET
CAUTION: DO NOT CHANGE SWITCH
POSITION WITH POWER ON