Maintenance / Repair; Dismounting; Safeguard The Housing Cover For Devices With "Ex D" Type Of Protection - ABB 2600T Series Operating Instruction

15 Maintenance / Repair

WARNING – Bodily injury
The device can be operated at high pressure and
with aggressive media.
Any medium that squirts out can cause severe
injuries.
Depressurize the pipeline/tank before opening the
transmitter connection.
NOTICE – Potential damage to parts
The electronic components of the printed circuit
board can be damaged by static electricity
(observe ESD guidelines).
Make sure that the static electricity in your body
is discharged before touching electronic
components.
If pressure transmitters are used as intended under normal
operating conditions, no maintenance is required.
It suffices if the measuring range start and/or the spat are
checked at specific intervals - depending on the operating
conditions. If deposits are expected to accumulate in the
measuring cell, the measuring cell should be cleaned on a
regular basis, in accordance with the operating conditions.
Preferably the measuring cell should be cleaned in a
workshop.
IMPORTANT (NOTICE)
For transmitters in safety-relevant applications in
accordance with IEC 61508, verification in
accordance with the paragraph "Acceptance test"
in chapter "Functional safety in accordance with
IEC 61508" is prescribed at fixed time intervals.
Repair and maintenance tasks must only be executed by
employees of an authorized customer service organization.
For replacement and repair of individual components use
original parts.
WARNING – bodily injury!
Transmitters with explosion protection must be
either repaired by the manufacturer or approved
by a certified expert after the repair. Comply with
the relevant safety regulations and take the
appropriate safety precautions before, during,
and after repair work.
78 OI/266CXX/266JXX/HART-EN Rev. B | 266CRx, 266JRx, 266CSx, 266JSx

15.1 Dismounting

WARNING – Potential danger if device is
disassembled incorrectly!
Before removing or disassembling the device,
check for hazardous process conditions such as
pressure on the device, high temperatures,
aggressive or toxic media, and so on.
Carefully read the instructions in the sections
"Safety", "Mounting", and "Electrical
connections", and perform the specified steps in
reverse order.
15.2 Safeguard the housing cover for devices with "Ex d"
type of protection
After tasks on the transmitter housing, for devices with "Ex d"
type of protection strictly ensure that the housing cover is
safeguarded again. To do this, a safety screw (hexagon socket
screw) is provided on both facing sides of the electronics
housing, at the bottom.
1. Screw the housing cover hand tight onto housing.
2. Turn the safety screw counterclockwise to secure the
cover. The screw is unscrewed until the screw head
arrests the housing cover.
Fig. 52
1 Safety screw