LumaSense Technologies KTG 218 - Handbuch (Seite 17)

Infrared Temperature Switch KTS 218 · KTG 218
8
9.1 Avoiding reading errors caused by faulty assembly
To avoid reading errors if an exact temperature value is necessary, please note the following points when
mounting the switch:
1. The diameter of the measuring object should not be smaller than the switch’s spot size (see 7, Optics).
2. A source of radiation behind or around the measuring object can influence the result. If the object of
interest is transparent or partly transparent, another material behind the object could transmit its radiation
to the pyrometer as well. In this case the location of the switch should be changed, or, if the background
radiation remains constant it can be compensated for by changing the setting point respectively.
3. Please take into account that radiation, from other hot materials around the measured object, can be
reflected and influence the result. If the measured object has a low emissivity, the measured temperature
will be mainly that from the reflected object - not from the intended measured object itself. To prevent
ambient radiation from reaching the spot area, a mounting tube should be used. The mounting tube
should be placed as near as possible to the measured object so that the tube’s shadow blocks out most
of the ambient radiation.
10 Transport, packaging, storage
The instrument can be damaged or destroyed if shipped incorrectly. To transport or store the instrument,
please use the original box or a box padded with sufficient shock-absorbing material. For storage in humid
areas or shipment overseas, the device should be placed in welded foil (ideally along with silica gel) to
protect it from humidity.
The switch is designed for a storage temperature of -20 … 70°C with non-condensing conditions. Other kind
of storage can damage or malfunction the instrument.
11 Maintenance
11.1
Safety
Attention during services the switch:
Should the switch be integrated in a running machine process the machine should be switched off and
secured against restart before servicing the switch.
11.2
Service
The switch does not have any parts which require regular service, only the optics has to be kept clean. The
lens can be cleaned with a soft cloth in combination with alcohol (do not use acid solutions or dilution). Also
standard cloths for cleaning glasses or photo objectives can be used.
12 Trouble shooting
Before sending the KTS/KTG 218 for repair, try to find the error and to solve the problem with the help of the
following list.
Measuring errors :
• Incorrect alignment of the switch to the object
⇒ New correct alignment to achieve the max. temperature signal (see 8)
• Measuring object smaller than spot size
⇒ check measuring distance, smallest spot size is at nominal measuring distance (see 7)
• Lens contaminated
⇒ Clean lens carefully (see 11.2)