100
8020216/19YN/V3-0/2020-12| SICK
O P E R A T I N G I N S T R U C T I O N S | DUSTHUNTER SP100 Ex-3K
Subject to change without notice
12
MAINTENANCE
12.5.3
Non-return valve
Make a visual check of the non-return valve at each service interval. Clean with suitable
means (e.g. cotton swabs) when necessary. Replace the non-return valve with a spare part
when it no longer functions (
see “Spare parts, DUSTHUNTER SP100 Ex-3K”, page 134
)
see “Replacing the non-return valve”, page 107
).
12.5.4
Test equipment for linearity test
Measurement linearity can be checked using a linearity test. In this case, filter glasses with
defined transmission values are positioned in the beam path and the values compared
against those measured by the measuring system. Compliance within the allowed
tolerance means the measuring system is working correctly. The filter glasses with holder
required for the check are deliverable as a set including documentation and a carrying case
(
see “Device check accessories”, page 136
). The measuring function is checked by the
function check and the linearity test.
12.5.5
Power supply without control unit
Due to the regulations for explosion protection, some maintenance activities must not be
carried out in the Ex-area; the sender/receiver unit must be dismantled and transported
out of the Ex-area for this purpose. Observe the safety instructions in Section 2 and at the
beginning of this Section before carrying out the activities. If a power supply is required for
the work, you can establish this according to the following diagram. For the optional
accessories
see “Options for MCUDH Ex-3K control unit”, page 136
.
Fig. 57: Voltage supply for sender/receiver unit without the control unit
Plug and socket 5-pol.
RS485 B yellow
RS485 A green
Insulating terminal
(e.g.)
RS485 B blue
RS485 A black
Plug adapter (6075779)
Con
nect
ion
line
(70442
017)
SOPAS Service Kit (2097408)
USB/RS485 adapter
Power supply
unit
(24 V DC, 1 A)
White
Brown
The optional power supply unit for supplying the remote modules (
MCUDH Ex-3K control unit”, page 136
) can also be used to supply power to the
sender/receiver unit without using the control unit.
