Ecom Instruments Ex-Pt 720 User Manual
Page 2
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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.