18 19
- obviously incorrect measurements occur.
- measurements with the unit are no longer possible.
- the permissible limiting values were exceed.
4. Safety regulations
In order to exclude incorrect operation of the unit, its use assumes
that the user is aware of and complies with the usual safety regu-
lations.
- the batteries may only be changed outside the Ex-area.
- it is not allowed to take additional batteries into the Ex-area.
- only type approved batteries may be used.
- only sensors which have been approved by ecom may be used.
- It must be ensured that the unit is not taken into Zone 0.
- measurements on electrically live parts are not allowed.
- observe the measuring range of the temperature sensors.
OOverheating will damage the sensors.
- avoid use in aggressive acids or alkalis.
- the unit may not be opened in Ex-areas.
4.1 Special conditions for use in Zone 0
The measurement of temperatures with the Ex-Pt 720 within
Zone 0 is only permitted if the following conditions are complied
with:
- a stainless-steel sensor Type 0628 2232 is used.
- the Ex-Pt 720 itself may not be taken into Zone 0.
- It must be absolutely ensured that the unit does not find its way
a˝accidentally into Zone 0. In order to guarantee this, the carrying
ststrap of the unit must be attached additionally to the belt of the
u˝user or to a loop attached to his belt. The length of the carrying
ststrap must be so adjusted that when the unit hangs freely on the
c˝carrying strap, the Ex-Pt 720 maintains a spacing of 50cm to the
bboundary area of Zone 0.
- Should the unit be used in the optionally available leather case,
t˝˝the carrying strap of the unit must still comply with the conditi-
ti˝ons for attachment to the user’s body.
5. Ex-Data
EC-test approval-no.: TÜV 01 ATEX 1757 X
Ex-designation: II 2(1) G EEx ia IIC T4
Approved for Zone 1, equipment group II, gas group C explosions-
endangered gases, vapours or fog, temperature class T4.
Only the sensors specified in the approval certificate may be used.
Sensor no. 0628 2232 may be used in Zone 0 !
6. Technical Details
Ambient temperature Ta: -10 ... +50°C
Storage temperature: -20 ... +70°C
Batteries: 9V-Block, 6LR61 as per IEC
(only type tested batteries)
Supplier Type
Varta Alkaline No.4822
Varta Alkaline Universal No.4022
Varta Alkaline Electric Power No.8022
Duracell Alkaline
Duracell Alkaline Ultra
Duracell Professional Alkaline Battery Procell
Everady
(Ralston Energy Systems SA) Alkaline Energizer
Panasonic Alkaline Power Line Industrial Battery
Daimon Alkaline