103
8024493/AE00/V1-0/2020-09| 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-2K
Subject to change without notice
MAINTENANCE
12
12.6.13
Exchanging the non-return valve
Exchange criterion: In case of damage.
Ex-condition:
Replacement can be carried out in the Ex-area when the absence of a
potentially explosive atmosphere has been verified with a gas warning
device.
Work steps:
1
Disconnect the entire device (control unit and sender/receiver unit) from the power
supply.
2
Unscrew the four flange screws and remove the sender/receiver unit from the duct
(Caution: hot, aggressive and explosive gases may escape; the measuring probe may be
hot) and allow it to cool down if necessary.Disconnect the potential equalization line.
3
Switch off the purge gas supply.
4
Place the enclosure rear side of the sender/receiver unit on a flat surface.
5
Unscrew the non-return valve (SW 22) while holding the reducer with a wrench (SW 24).
6
Screw in new non-return valve with new sealing ring (5321372).
7
Connect the potential equalization: Switch on purge gas supply.
8
Fit the sender/receiver unit on the duct and tighten the four flange screws with a torque
of 20 Nm.
9
Put the complete device back into operation (connect potential equalization, switch on
voltage and check measured and status values).
12.6.14
Exchanging the button cell in the control unit
Exchange criterion: In case of need.
Ex-condition:
Replacement can be carried out in the Ex-area when the absence of a
potentially explosive atmosphere has been verified with a gas warning
device.
Take suitable measures to prevent dust from entering the control unit
enclosure when the door is open.
Work steps:
1
Disconnect the entire device (control unit and sender/receiver unit) from the power
supply.
2
Make sure that the environment allows the door of the control unit to be opened and
open it after the waiting time has elapsed.
3
Remove the old button cell on the circuit board and insert the new button cell with
adapter ring (2114601) into the receptacle, observing the installation direction of the
button cell. The circuit board is marked accordingly at this point.
4
Put the complete device back into operation (switch on voltage and check measured and
status values, set date and time).
12.6.15
Exchanging the Ex power supply unit
Exchange criterion: In case of damage.
Ex-condition:
Replacement can be carried out in the Ex-area when the absence of a
potentially explosive atmosphere has been verified with a gas warning
device.
WARNING:
Risk of explosion when using an unspecified button cell
There is a risk of explosion when a different type of button cell is used.
▸
Only use button cell type BR1632A with adapter ring (