WIKA 4000 Series Installation Operation & Maintenance

Handling:

There are many variations of RTD's and RTD assemblies.
Even though some may appear to have heavy duty
protecting tubes or thermowells, the internal parts can be
delicate. Care in handling is a must to insure the sensor
integrity. DO NOT DROP . RTD's are carefully packed at the
factory. Inspect the package for indications of shipping
damage. If shipping damage is noticed report it immediately
to the shipping company and make the necessary reports.
WIKA Instruments Ltd. ships on a FOB factory basis
therefore it is your responsibility to file any claims. Hidden
shipping damage can occur (no evident sign of mishandling).
If after carefully opening the package, damage is discovered
save all product and shipping material. Notify and file the
proper claims with the shipping company immediately.

Storage:

Store in a dry, clean place. Avoid areas where dropping or
stacking may occur.

Location:

The RTD should SEE , as close as possible, what the product
in the process is experiencing in order to get meaningful
temperature measurements. Locate the RTD as close to the
product as possible. A rule of thumb is to have at least 10 tube
diameters immersion in the hot zone. Avoid direct flame
impingement or stagnant areas.
SEE PAGE 2 FOR ASSEMBLY EXAMPLES.
Wire Connection Diagrams
W-white R-red (color coded insulation)
00915, Rev 0, 08/06/12, P. 1/2
INSTALLATION-OPERATION-MAINTENANCE
FOR RTD (RESISTANCE TEMPERATURE DETECTOR)
R W R R W
2 Wire 3 Wire

Installation:

DO NOT ATTEMPT to mechanically connect the assembly in
the process by tightening at the terminal or connection head.
USE ONLY THE PROCESS FITTING OR THE
THERMOWELL FLATS FOR THIS PURPOSE. Terminals or
connection heads that are twisted can be damaged or cause
short circuits that can adversely affect the operation of the
RTD. DO NOT BEND THE RTD ELEMENT (within six inches
of the end sheath). Bending will break the element that is in
the metal sheath and the sensor will be rendered inoperative.
If the thermowell or protection tube must be welded into the
process, carefully remove RTD sensor before welding and
be sure to handle carefully. Keep clean and replace without
forcing or stressing any components.

Wire Extension:

See general operation parameters and job wiring diagrams.

Maintenance:

Regularly scheduled maintenance procedures should
include inspection and calibration intervals so that life and
reliability of the instrumentation is improved and the
likelihood of sudden serious failure is reduced. These
procedures should be set up by the responsible engineering
department and performed by personal that are familiar with
the operating principles upon which the system is based. DO
NOT LUBRICATE.
R R W W R
4 Wire, Type A
Head Office: 3103 Parsons Road
Edmonton, Alberta T6N 1C8
Telephone: (780) 463-7035
Fax: (780) 462-0017
R W W
4 Wire, Type B
WIKA INSTRUMENTS LTD.
C