drd6322a0600h_01 - 2/3
2.3
D
IMENSIONS
DRD–6
2–2, –3, –6
Standard version
DRD–6
2–C, –D
SIL and SIL-Ex version
Trans
PLK-501-2
Plug-in display
3. INSTALLATION
Due to its small size and weight the transmitter can be directly installed on tanks,
pipes, machines, etc. without any mounting aids.
To enable the safe replacement of the instrument during operation the use of closing
armature is recommended. A simple ball valve will be suitable for lower pressures
and for higher pressures (above 6 bar) a three-way blow-off needle-valve can be
suggested.
In case of outside installation, the unit should be protected against rain or splash
water, because malfunction may occur from a leakage if the connector’s screw is
improperly tightened (i.e. not appropriate sealing).
3.1 I
NSTALLATION INSTRUCTION
The measured medium – depending on its type and properties, might be hazardous
to the installer. Therefore, the wear of appropriate protective clothing, gloves, and
goggles are recommended.
Be careful because the membrane is very vulnerable!
Torque should only be transferred to the hexagonal screw on the instrument body
(torque wrench).
The cylindrical housing of the transmitter must not be gripped
and tightened with a pipe wrench!
The plug-in electric connector can be unplugged after releasing and removing its
fastening screw. The connection insert can be pushed out by a screw driver from
the direction of the screw. The terminal block can be rotated with 90° within the
housing, so that the orientation of the cable gland could be changed to face
downwards. This is to prevent any leakages of the housing and subsequent
damages may occur. The power cable is to be connected with the relevant points of
the connector by guiding it through the cable gland (ISO 4400). Make sure if the
cable gland and the sealing plate of the connector tightened properly! Tighten the
screw of the connector so that the sealing plate underneath seals properly!
For the sake of noise suppression, the transmitter housing is grounded. If the
grounding of the process is correct no further grounding is needed, otherwise the
instrument should be grounded.
When installing the device, avoid high mechanical stresses on the pressure port!
This is particularly true for the pressure port made of plastic.
Installation steps:
Tightening torques:
¾" BSP: max. 15 Nm;
The specified tightening torques must not be exceeded!
Mounting steps for BSP thread connections according to DIN 3852:
Do not use any additional sealing material such as Teflon tape! Check if the O-ring
is undamaged, it has a flawless and clean surface and seats in the designated
groove properly. Screw the device into the corresponding thread by hand, and
tighten the parts with a suitable torque wrench.
If your device can be secured with a knurled ring, the pressure transmitter should
only be tightened by hand!
4. WIRING
Use a shielded and twisted multicore cable for the electrical connection. Electrically
connect the device according to the “Connection of ISO 4400 plug” figure. For
devices with cable gland, make sure that the external diameter of the cable used is
within the allowed clamping range! Once connected the wires, tighten the gland
screw firmly until the sealing is proper!
For the installation of a device with an integrated cable, the bending radiuses have
to comply with the following:
Cable without ventilation tube:
- static installation: 8-fold cable diameter,
- dynamic application: 12-fold cable diameter.
Cable with ventilation tube:
- static installation: 10-fold cable diameter,
- dynamic application: 20-fold cable diameter.
In case of devices with cable outlet and integrated ventilation tube, the PTFE filter
located at the cable end on the ventilation tube must not be damaged or missing!
2-wire current output
3-wire voltage output
Connection of integrated cable
Connection of iso 4400 plug
Connection of M12x1 / 4 pin plug
