Ex-Pt 720 Operating Instructions
Contents 1. Application 23 2. Safety references 23 3. Malfunctioning and inadmissible operation 23 4. Safety regulations 24 4.1 Special conditions for use in Zone 0 5. Ex-Data 6. Technical Details 7. Operating instructions 25 25 26 27 7.1 Commisioning 27 7.2 Switching-on and measurement 28 7.2.1 Switching-on 28 7.2.2 HOLD-Function 28 7.2.3 Auto-Off-Function 28 7.2.
1. Application The Ex-Pt 720 is a precise, robust and simple to operate temperature measuring device for temperature measurements in explosionendangered areas of Zones 2 and 1 in accordance with Directive 1999/92/EC (ATEX 137) and Zone 2, 1 and 0 according to NEC (FM-Marking). 2. Safety references These safety instructions contain information and safety regulations that must be followed to ensure safe and reliable operation of the unit under the described conditions.
. Safety regulations Use of this unit assumes that the operator observes conventional safety regulations and has read the certificate in order to eliminate faulty operation of the unit. The following additional safety regulations must also be observed: - The unit may not be opened in Ex-areas. - 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.
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 or 0628 2432 is used. - The sensors are to be grounded via the ground wire. When doing this make sure there is a secure ground connection. The grounding terminal is to be attached in such a way that it cannot be detached accidentally.
safe for Class I Zone 0 Group IIC hazardous (classfied) locations temperature class T4 at a 50°C ambient. 6. Technical Details Ambient temperature Ta: Storage temperature: Batteries: -10 ... +50°C -20 ... +70°C 9V-Block, 6LR61 as per IEC (only type tested batteries) Table with type-tested batteries: Type Manufacturer 6 LR 61 Alkaline No.4822 Varta 6 LR 61 Alkaline Universal No. 4022 Varta 6 LR 61 Alkaline Elektric Power No.
Please also note the maximum working temperature of the unit Ta: -10 ... +50°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 measured value, ±1 digit 7. Operating instructions Sensor connection HOLD-button I/O button Safety loop for use on Zone 0 reverse side: safety screw 7.
7.2 Switching-on and measuring 7.2.1 Switching-on Insert sensor into measuring socket (take note of plug coding). Switch unit on with >I/O pushbutton<. After switching on, a short display and function test will take place. The measuring instrument is now ready for use. 7.2.2 Hold-Function The measured values can be retained in the display with the >Hold pushbutton< 7.2.
7.3 Battery change Should the symbol be displayed constantly, then the battery will need to be changed within the next 1-2 hours. The unit switches itself automatically off should the battery voltage be too low. Open the back of the unit by unscrewing it, remove the exhausted battery and insert a new one (observe polarity). - while changing the battery, the cover may not be separated from the unit top shell. - Only use approved battery types.
Stainless-steel probe 0628 2232: accuracy: Ex-Zones: probe dimensions: sensor dimensions: response time (99%): Drone Tankprobe 0628 2432: accuracy: Ex-Zones: probe dimensions: wight: response time (99%): cable: 7.4.
Stainless-steel insertion probe 0600 9999 0628 2232: accuracy: class A Ex-Zones: 2, 1, 0 probe dimensions: >50mm x >4mm (w x ø) sensor dimensions: >15 x >3mm (w x ø) response time (99%): 10 Sec. Drone Tankprobe 0600 9999 0628 2432: accuracy: class A Ex-Zones: 2, 1, 0 probe dimensions: 235mm x 25mm (w x ø) wight: 400g (without cable) response time (99%): 10 Sec cable: 1 ... 50 m 7.4.3 Calibration instructions The plastic handle withstands a temperature of approx. 200°C for a short time.
10. Disposal Old electrical devices as well as „historical“ old electrical devices from ecom instruments GmbH are supplied for disposal at our expense and disposed of free of charge in accordance with European Directive 2002/96/EC and the German electrical law of 16/03/2005. The costs associated with returning devices to ecom instruments GmbH are to be borne by the sender. 11.
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Appendix (13) (14) EC – Type approval test certificate No. TÜV 01 ATEX 1757 X (15) Description of the equipment The explosion-protected temperature measurement unit Type Ex-Pt 720* may be used in explosion-endangered areas which require category 2 or 3 respectively. The sensors which are specially mentioned in the operating instructions may be used for the measure ment of temperatures in category 1. The permissible ambient temperature range is 0°C to +50°C.
1st Supplement to EC – Type approval test certificate No. TÜV 01 ATEX 1757 The company: ecom instruments GmbH Industriestrasse 2 D-97959 Assamstadt In the future, the explosion-protected temperature measuring instrument Type Ex-Pt 720* may be manufactured in accordance with the documentation listed in the test report. The changes are concerned with the external design and the use of further sensors.
2. S U P P L E M E N T to EC-Type-Examination Certificate No. TÜV 01 ATEX 1757 X (translation) of the company: ecom instruments GmbH Industriestrasse 2 97959 Assamstadt Germany The explosion-proof temperature measuring device of type EX-Pt 720* has been approved for manufacture according to the documents listed in the test/examination report. The changes refer to the outer structure and the use of an additional sensor.
3. S U P P L E M E N T to EC-Type-Examination Certificate No. TÜV 01 ATEX 1757 X (translation) of the company: ecom instruments GmbH Industriestrasse 2 97959 Assamstadt Germany The explosion-proof temperature measuring device of type EX-Pt 720* has been approved for manufacture according to the documents listed in the test/examination report. The modifications are related to the internal structure of two probes, only.
4th A D D E N D U M to certificate number: TÜV 01 ATEX 1757 X Device: Explosion-shielded temperature gauge Type Ex-Pt 720* Manufacturer: ecom instruments GmbH Address: Industriestr. 2 97959 Assamstadt Order number: 8000554136 Date of issue: 12.11.2007 Changes: The explosion-shielded temperature gauge type Ex-Pt 720* may be manufactured in the future in accordance with the documents listed in the test report.
5th A D D E N D U M to certificate number: TÜV 01 ATEX 1757 X Device: Explosion-shielded temperature gauge Type Ex-Pt 720* Manufacturer: ecom instruments GmbH Address: Industriestr. 2 97959 Assamstadt Order number: 8000554527 Date of issue: 04.07.2008 Changes: The temperature sensors 06282232 and 06282432 approved for Zone 0 and their special sensors are additionally provided with a grounding connection.
5th amendment to certificate number TÜV 01 ATEX 1757 X The following are also applicable for measuring temperatures in Zone 0: The temperature gauge type Ex-PT 720* should not be introduced into areas which require the use of category 1 equipment. Only the stainless steel sensors that are specified as being suitable for Zone 0 in the instruction manual may be used (type 0628 2232 or 0628 2432). The grounding terminal is to be used when using the sensors in Zone 0.
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