Chapter 3 Calibration
HF Series X-ray Generators - Service Manual Revision W
Quantum Medical Imaging, LLC 3-37
kV Calibration Function
This procedure calibrates the generator to verify accurate system measure-
ment of peak tube potential (kVp). The generator’s ability to measure peak
tube potential accurately is verified using a pre-calibrated kVp meter (Dyna-
lyzer or equivalent) as a benchmark. Access the KV Calibration Screen,
shown below, and proceed as follows:
Figure 3-29. KV Calibration Screen (50 kV Calibration)
WARNING! To avoid injury to personnel, ensure
that system power is removed prior to making
and removing any electrical connections.
1. Connect a kVp bleeder tank in series between X-ray tube and the genera-
tor’s H.V. Transformer (A17), or use a non-invasive kVp meter.
2. Verify 50 KVP appears in the center display box of the KV Calibration
Screen and First Measure appears in the top right field.
3. Take an exposure at the setting indicated in the center display box
(i.e., 50 kVp, 200L mA, 100 mS).
4. On the kVp meter, observe the measured kV value. (Ideally, this value
should be 50 kVp.)
5. If not 50 kVp, adjust the value in the Measure KVP#1 field up or down
by pressing the key next to the up or down arrow, respectively, until the
Measure KVP#1 field is set to the value displayed on the kVp meter.
Each time the key is pressed changes the kV value up/down in one-tenth
increments.
CENTER
DISPLAY
BOX
PRESS TO
PROCEED TO
100 KV CAL.
50 KV
INCREASE/
DECREASE
KEYS
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