GE Senographe DS Manual page 548

GE Healthcare
Revision 1
Job Card ELE A007 - Line Resistance Measurement
2. While looking at the multimeter, press the power-on switch on the Supply Command Board 200-PL2.
During a period of 3 seconds, a resistive load (power resistors R1 and R4 on the Supply Command
Board 200-PL2) is connected across the line input, causing a drop in the voltage reading on the mul-
timeter. Note and write down this closed circuit voltage:
Note:
After this 3 second period the red LED DE3 on the Supply Command Board 200-PL2 illuminates.
This indicates that heating of the resistive load prevents an immediate repeat reading. After about
15 minutes, the LED goes out, the reading can then be repeated if necessary.
3. Calculate line resistance R
where R , the internal resistive load, depends on the nominal AC supply voltage V:
INT
4. Turn off the Senographe: set the generator power switch to the 0 position and switch off AC power.
5. Disconnect the line voltage selection wire SEL from the 0 V lug on the Mains Distribution Board 200-
PL1. Reconnect the line voltage selection wire to the lug corresponding to the nominal (not mea-
sured) AC line voltage. Tighten the lug nuts to a torque setting of 4 Nm.
Check that the calculated line resistance R
the nominal AC supply voltage.
If the calculated value exceeds the maximum value given in Table 1, consult with the hospital electri-
cal department and your OLC. The problem must be resolved before the Senographe system is put
into service.
TABLE 1 - MAXIMUM PERMISSIBLE LINE RESISTANCE
Chapter 7
Service Information and Procedures Class A 2385072-16-8EN
V =....................................
2
according to the formula:
L
R = [(V - V ) / V ] R
L 1 2 2
Voltage (V)
200
208
220
240
does not exceed the maximum value given in Table 1 for
L
Nominal AC voltage
240 V
220 V
208 V
200 V
Page no. 548
INT
R (Ω)
INT
11
11
11
11
Maximum Line Resistance
0.40
0.34
0.30
0.28
Senographe DS
JC-ELE-A-007.fm