Ecom Instruments Ex-Pt 720 - Manual (Page 2)

16 17
Contents
1. Application 17
2. Safety references 17
3. Malfunctioning and inadmissible operation 17
4. Safety regulations 18
4.1 Special conditions for use in Zone 0 18
5. Ex-Data 19
6. Technical Details 19
7. Operating instructions 20
7.1 Commisioning 21
7.2 Switching-on and measurement 21
7.2.1 Switching-on 21
7.2.2 HOLD-Function 21
7.2.3 Auto-Off-Function 21
7.2.4 Changing measuring range 21
7.2.5 Switching-off 22
7.3 Battery change 22
7.4 Temperature probe 22
7.4.1 Standard probe 22
7.4.2 Special probe 23
7.4.3 Calibration instructions 24
8. Repair 24
9. Cleaning and maintenance 24
10. Guarantee & liability 25
11. Declaration of EG-Conformity 26
12. EG-Type approval 27
1. Application
The Ex-Pt 720 is a precise, robust and simple to operate tempera-
ture measuring device for temperature measurements in explo-
sion-endangered areas (excluding firedamp-endangered under-
ground mining) of Zones 2 and 1 according to IEC/CENELEC.
2. Safety references
This operating manual contains information and safety recommen-
dations which must be complied with in order to guarantee safe
functioning of the unit under the conditions described
Please read these operating instructions very carefully before
using the unit !
In case of doubt (for example due to mistakes in the translation)
the German operating instructions are assumed to be valid.
3. Malfunctioning and inadmissible operation
As soon as one suspects that the safety of the equipment is end-
angered, it must be taken out of service and immediately removed
from the Ex-area. Precautions must be taken to prevent its unin-
tentional reuse.
We recommend that the unit be returned to the manufacturer for
checking.
For example, the safety of the unit could be endangered when:
- damage to the housing is visible.
- the unit was subjected to improper strain.
- the unit was incorrectly stored.
- the unit was damaged in transit.
- the lettering on the unit is unreadable.
- malfunctioning occurs.