Table 1: Maximum capacitive load MPM ionisation equipment
Type MPM Maximum capacitive load
Ion balance control
switched off
MPM-23x.
1500 pF
MPM-24x.
1500 pF
MPM-25x
1500 pF
MPM-27x
1500 pF
See table 2 for determining the total load and load capacity of the MPM. The load of the
H/HE/BW nozzles does not have to be taken into account.
Table 2: Capacitive load of the ionisation equipment
Ionisation equipment
MEB
MaxION
SS
EP-Sh-N
P-Sh-N
AS-10/AS-20/VolumION
with 3-metre shielded cable
Cobra with 6-metre cable
Cobra with 12-metre cable
Connection cable
Shielded cable, 4 kV equipment
Shielded cable, 5 kV equipment
Shielded cable, 7 kV equipment
For example, a combination of two anti-static bars on one MPM:
♦ One MEB anti-static bar with an effective length of 2 metres and connected with a 3-
metre shielded high voltage cable:
♦ One P-Sh-N anti-static bar with an effective length of 3 metres and connected with a 4-
metre shielded high voltage cable:
♦ The power unit's total load will then be: 525 + 800 = 1325 pF
MPM_UM_9752080610_NL_D_GB_F_V1_5
Ion balance control
switched on
1500 pF
1500 pF
1000 pF
750 pF
Load per metre
75 pF
65 pF
75 pF
50 pF
100 pF
450 pF
225 pF
425 pF
Load per metre
75 pF
65 pF
125 pF
2 x 75 pF + 3 x 125 pF = 525 pF
3 x 100 pF + 4 x 125 pF = 800 pF
GB
41