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manual abstract
Safety references 3. Malfunctioning and inadmissible operation 4. Safety regulations 4.1 Special conditions for use in Zone 0 5. Ex-Data 6. Technical Details 7. Operating instructions 7.1 Commisioning 7.2 Switching-on and measurement 7.2.1 Switching-on 7.2.2 HOLD-Function 7.2.3 Auto-Off-Function 7.2.4 Changing measuring range 7.2.5 Switching-off 7.3 Battery change 7.4 Temperature probe 7.4.1 Standard probe 7.4.2 Special probe 7.4.3 Calibration instructions 8. Repair 9. Cleaning and maintenance 10. Guarantee & liability 11. Declaration of 12. EG-Type approval 1. Application The Ex-Pt 720 is a precise, robust and simple to operate tempera 17 ture measuring device for temperature measurements in explo17 sion-endangered areas (excluding firedamp-endangered under ground mining) of Zones 2 and 1 according to IEC/CENELEC. 17 18 2. Safety references 18 19 This operating manual contains information and safety recommen19 dations which must be complied with in order to guarantee safe functioning of the unit under the conditions described 20 21 Please read these operating instructions very carefully before using the unit ! 21 21 In case of doubt (for example due to mistakes in the translation) 21 the German operating instructions are assumed to be valid. 21 21 3. Malfunctioning and inadmissible operation 22 As soon as one suspects that the safety of the end 22 angered, it must be taken out of service and immediately 22 from the Ex-area. Precautions must be taken to prevent its unin tentional reuse. 22 We recommend that the unit be returned to the manufacturer for 23 checking. 24 For example, the safety of when: 24 - damage to the housing 24 - the unit was subjected strain. - the unit was incorrectly stored. 25 - the unit was damaged 26 - the lettering 27 - malfunctioning - 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 regulations. - 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. Overheating 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 complied with: - a stainless-steel sensor Type 0628 2232 is used. - the Ex-Pt 720 itself may not - It must be absolutely ensured that the unit does not find accidentally into Zone 0. to guarantee this, the carrying strap of the unit must user or to a loop attached strap must be so on the carrying strap, boundary of Zone - Should the unit be used in the optionally available leather case, the carrying strap of the unit must still comply with the conditions for attachment to the user’s body. 5. Ex-Data EC-test approval-no.: TUV 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 Everady (Ralston Energy Systems SA) Alkaline Energizer Panasonic Alkaline Power Line Daimon Alkaline Operating life: approx. 100h Dimensions: 190 x 57 x 42 mm Weight: approx. 200g (with batteries) Case material: ABS (slight discolouration due to additives) IP-protective rating: IP 54 EC-designation: 0102 Display: LCD, digit height 14mm Measuring device: Pt 100-Sensor, 4-wire-technique Measuring range: -50°C to +400°C Accuracy: -50°C to +199,9°C: ±0,2°C, ±1 digit +200°C to +400°C: ± 0,2% from measured value, ±1 digit Resolution: -50°C to +199,9°C: 0,1°C +200°C to +400°C: 1°C System accuracy: -50°C to +99,9°C: ±0,6°C, ±1 digit (with immersion/ insertion sensor) +100°C to +400°C: ± 0,5% from measuredvalue, ±1 digit 7. Operating instructions Sensor connection HOLD-button I/O button Safety loop for use on Zone 0 reverse side: safety screw 7.1 Commissioning - carefully read operating instructions. - open back of unit with key. - insert battery correctly (observe polarity). - insert battery safety cover. - close unit with safety screw. 7.2 Switching-on ...