Maximum Load - ITW Simco-Ion Multi Power Master Notice D'utilisation

4.2 Maximum load

The load on the MPM is determined by the ionisation equipment connected and the shielded
connecting cable used. The capacitive load of the equipment and cables must be added
together in order to calculate the total load of the MPM.
Note:
- The maximum output current of the MPM is 3 mA.
- The maximum capacitive load of the MPM is 1500 pF.
- When the ion balance option is used (only with the MPM-xxR), the maximum
capacitive load of the MPM is lower in some cases than 1500 pF, see also
table 1.
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
MEJ
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_V3_2
Ion balance control
switched on
1500 pF
1500 pF
1000 pF
750 pF
Load per metre
75 pF
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
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