Fluke Biomedical 35080M - Manual (Page 12)

Operation
Battery Check
2
2-1
Section 2
Operation
Prior to taking measurements with the Model 35080M kVp Divider,
it is suggested that the battery and internal calibration be checked.
2.1 Turning the Unit ON and OFF
The 35050M has a miniature power button (located near the BNC output connector) that becomes
depressed (ON) while a BNC cable is attached and released (OFF) when the cable is removed. When
the unit is not in use, remove the cable to preserve battery life. Do not cover the BNC connector with a
dust cap as this will turn on power and consume battery life as well.
Do not attach any TRIAX type cable into the BNC
connector. The BNC connector can only
accommodate a 2-pin COAX type cable. Attempting
to use a TRIAX cable could result in shock hazard or
damage to the unit.
2.2 Battery Check
Set the function switch to the “CAL / BAT CHK” position. Depress the power button, either by hand or by
attaching a BNC cable to the output connector. The LED will indicate whether the battery is usable
(green, or above 7.0 volts) or needs to be replaced (red, or below 7.0 volts).
The battery must be replaced if the voltage is less than 6.5 volts as the instrument will not function
properly when the voltage supply is below this minimum level. To preserve battery life, do not run the unit
in the CAL mode for long periods of time.
2.3 Internal Calibration Check
Connect the output of the Model 35080M kVp Divider to a DVM with ± 0.1% accuracy. Remove any filter
pack that may be inserted in the kVp Divider. Turn the function switch to the “CAL” position. After a short
delay, a voltage of 0.750 ± 1% will appear. This reading verifies the stability of the kVp Divider ratio
electronics. A 1% error in the kVp Divider gain will cause a maximum kV reading error of 0.75% of
reading. Refer to Section 9.5 for detailed information on calibration.
2.4 Filter Pack Selection
One Wide Range Filter Pack (37617) is provided as standard for the Model 35080M kVp Divider. See
Sections 4 through 8 of this manual for use of optional filter packs available from Fluke Biomedical,
Radiation Management Services.
NOTE
WARNING