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Chapter 5. Maintenance

5.4.3.3 Replacing ADTS 405R Mk2 AC Fuses

5.4.3.4 The ADTS 405R Mk2 has two 20 mm High Breaking Capacity (HBC) fuses for the AC

supply. These are located in the holder mounted on the power input connector on the rear of

the rack. They protect the entire unit. The fuses are connected in the live and neutral supply

circuit. For fuse specification, see Table 8-1 on page 101.

Figure 5-4: ADTS 405R Mk2 AC Fuse Positioning

a. Set the power switch to OFF.

b. Isolate the power supply to the instrument and disconnect the IEC power supply

connector.

c. Pull the capped lid of the fuse carrier (2) on the power supply input socket assembly.

d. Replace the fuse cartridges (3).

e. Refit the fuse carrier (2) flush in the power supply inlet socket assembly.

f. Refit and reconnect rack-mounted units.

g. Switch on the power supply and set the power switch to ON. The instrument should

now be operational.

Note: (1) To gain access to rack-mounted instruments, it may be necessary to partially or

completely withdraw the instrument. Isolate pneumatic supplies and depressurize all

pressure supply inlet and outlet lines.

WARNING Only replace the fuses with the correct type.

GE Druck ADTS 405 R Mk2 User Manual

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