CPI Canada Inc.
Installation
2
2.6.7
X-Ray Tube Housing Ground
In addition to the X-ray tube manufacturers recommended tube grounding procedure, a separate ground
wire (10 AWG, 6mm
2
) must be connected from the X-ray tube housing to one of the ground studs on the
HV module. Refer to figure 2-9 for the location of these ground studs. These ground locations may have
other ground wires already connected; ensure that these existing ground wires are not disconnected
when making the X-ray tube ground connection.
Failure to make this ground connection may result in intermittent operation and/or exposure errors.
2.6.8
Room Equipment
Refer to chapter 3C for connection of Buckys, interlocks, room lights, the DR imaging system (if
applicable), DAP, collimator lamp and system locks power, and to chapter 3D for installation and
calibration of AEC. It is suggested that these items not be connected until the initial run-up of the
generator is complete, and the tube auto calibration routine has been performed as described near the
end of this chapter.
2.6.9
Emergency Power Off / Power Distribution Relay
To connect an external emergency power-off switch, disconnect the jumper from J2-1 to J2-2 on the
generator control board. Then connect the emergency-off switch to J2-1 and J2-2. Refer to MD-0928 in
chapter 9.
For installations where installer-supplied auxiliary power distribution circuits are added to the generator,
24 VDC is available on the generator interface board to drive the coil of the power distribution relay.
Connect the coil to J2-3 (+) and J2-4 (ground). Refer to MD-0927 in chapter 9.
The maximum current
available from this source is 100 mA.
WARNING: THE EMERGENCY POWER OFF SWITCH DOES NOT REMOVE THE AC MAINS INPUT
VOLTAGE. HIGH VOLTAGE STILL EXISTS INSIDE THE GENERATOR IN THE AREA OF
THE AUXILIARY TRANSFORMER AND THE H.V. AUXILIARY BOARD. ENSURE THAT
THE AC MAINS DISCONNECT IS LOCKED OUT AND ALL CAPACITORS ARE
DISCHARGED BEFORE SERVICING.
2.6.10 Safety Interlocks
The room door interlock switch must be wired to the generator as described in
Inputs
in chapter 3C
before the generator is powered up. This switch must provide an open contact when the door is open.
NOTE:
THE INSTALLER MUST PROVIDE A VISUAL INDICATION OF THE ON/OFF STATE OF
EACH EXTERNAL DEVICE THAT CAN PREVENT THE GENERATOR FROM EMITTING
RADIATION, OR THAT CAN STOP THE GENERATOR FROM EMITTING RADIATION, OR
BOTH.
2.7.0
LOW-SPEED STARTER TUBE COMPATIBILITY
The Low Speed Starter is integrated into the H.V. Auxiliary Board within the CMP 200
®
and CMP 200
®
DR
generators. The phase-shift capacitor is chassis-mounted as shown in figure 1-4.
Use and disclosure is subject to the restrictions on the title page of this CPI document.
CMP 200
X-Ray Generator Service Manual Ch # 901476-02 Rev. P
Page 2-17