2
Installation
CPI Canada Inc.
Use and disclosure is subject to the restrictions on the title page of this CPI document.
Page 2-20
CMP 200
®
X-Ray Generator Service Manual Ch # 901476-02 Rev. C
2.8.2
Setting tube type (cont)
3.
The dual-speed starter used in CMP 200
®
DR X-ray generators will be either part number
901297-
02
, -
12
or -
13
(400 VAC units)
OR
901298-
02
,
12
or
13
(480 VAC units). The “–12” dual-
speed starter is fitted with a 37.5
μ
F low-speed capacitor, and will automatically select 7.5
μ
F or 6
μ
F for high-speed operation based on the setting of SW1. The “–13” dual-speed starter has a 31
μ
F low-speed capacitor, and based on the setting of SW1, will automatically select 6
μ
F or 5
μ
F
for high-speed operation. The “-02” dual-speed starter has a 60
μ
F low-speed capacitor, and a 20
μ
F high-speed capacitor. The stated values are equivalent capacitor values, and are derived from
several combinations of relay-selected series / parallel discrete capacitors (the “-02” dual-speed
starter has fixed capacitor values - not relay selected). Refer to MD-0924 in chapter 9 for details.
4.
To determine if the dual-speed starter is compatible with the desired tube as selected in step 1,
note the part number of the dual-speed starter in your generator. This is printed on a label near
the top left side of the dual speed starter chassis. This part number must appear in the last
column in table 2-2.
5.
Refer to figure 2-9. Set DIP switch SW1 with the binary code for the selected tube. The binary
code shown in table 2-2 programs the tube type (housing and insert), for example housing type
Varian Diamond with standard “R” stator and inserts per table 2-2 requires SW1-1 to be set OFF,
SW1-2 OFF, SW1-3 ON, SW1-4 OFF and SW1-5 OFF. This programs the voltages, brake times,
and boost times in table 2-2.
Additionally, SW1-6 to SW1-8 may be set to give incremental increases in boost time
over the preselected values (i.e. to run an older tube with worn bearings). For example, binary
000 gives zero increase, binary 001 gives 100 ms increase, binary 100 gives 400 ms increase,
and binary 111 gives a 700 ms increase in boost time. SW1-6 represents bit 1, SW1-7 bit 2, and
SW1-8 represents bit 3.
EXAMPLE:
Binary 100 = decimal 4 = 400 ms incremental boost time increase:
1 0 0
Bit 3
Bit 2
Bit 1
SW1-8 SW1-7 SW1-6
6.
The DIP switch setting shown in figure 2-9 is for the example in step 5 with an incremental
increase in boost time of 200 ms.
7
.
Please confirm all settings using a suitable tachometer to ensure proper anode RPM
before making any exposures.
NOTE:
FOR TUBES WHERE “LOW SPEED OPERATION ONLY” IS INDICATED, THE DUAL SPEED
STARTER MUST BE PROGRAMMED FOR LOW SPEED ONLY, AND WHERE “HIGH SPEED
OPERATION ONLY” IS INDICATED, THE DUAL SPEED STARTER MUST BE
PROGRAMMED FOR HIGH SPEED OPERATION ONLY. REFER TO THE TUBE SELECTION
SECTION IN CHAPTER 3C FOR THE PROCEDURE TO DO THIS.
THE DIP SWITCH SHOWN IN FIGURE 2-9 IS REPRESENTATIVE OF ONE STYLE OF
SWITCH ONLY. DEPENDING ON MANUFACTURER, YOUR DIP SWITCH STYLE MAY VARY.
PLEASE NOTE THE ON / OFF POSITIONS CAREFULLY FOR YOUR UNIT.