Wika 45 Uživatelský manuál stáhnout pdf (Strana 5)

4. Installation conditions, installation / 5. Troubleshooting

11484498.02 06/2010 GB/D/F/E

WIKA operating instructions bimetal thermometers for HVAC 5

4. Installation conditions and installation

Before installation ensure that all the necessary accessories needed for the

mounting method have been delivered. The accessories will be either on the

instrument or supplied in a separate bag, which in most cases will be attached to

the thermometer.

■

Before installing the probe or the pocket (protective sleeve), check whether

the material used (specied in the delivery note) is chemically resistant/

neutral to the medium being measured.

■

Heat conduction errors occur when the size, volume or area of the medium to

be measured is very small, so that the temperature probe becomes noticeable

as a thermal mass. Heat conduction errors may also occur when the insertion

length is not sucient, or when the instrument mounting ttings are attached

to a good heat conductor (e.g. metal plates) and the temperature dierence

between them and the medium to be measured is very high.

1) not for models E45.10, A46.11, A48.10 and edgewise panel design model TF-01-058KF-BI

5. Troubleshooting

Bimetal thermometers are maintenance-free instruments according to their basic

design. As measuring instruments, their measuring accuracy should be checked

at application-specic intervals. The wear condition of probes exposed to a

permanent thermal stress (even if this stress is very low), exposed to vibratory

stress, must be checked from time to time. If any visible damage is found, the

instrument must be replaced.

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Wika 45 Uživatelský manuál Strana 5