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DK37/M8 - H250/M8
DK37/M8 - H250/M8
DK37/M8 - H250/M8
DK37/M8 - H250/M8
Variable area flowmeter
Equipment category II 2 G and II 2 D, EPL Gb and Db
in protection type intrinsic safety "i"
© KROHNE 05/2018 - 4005351602 - AD DK37/H250/M8 II2GD R02 en
Supplementary Instructions
Supplementary Instructions
Supplementary Instructions
Supplementary Instructions
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Table of Contents
Related Manuals for KROHNE H250 Series
Summary of Contents for KROHNE H250 Series
- Page 1 Supplementary Instructions Supplementary Instructions Supplementary Instructions Supplementary Instructions Variable area flowmeter Equipment category II 2 G and II 2 D, EPL Gb and Db in protection type intrinsic safety "i" © KROHNE 05/2018 - 4005351602 - AD DK37/H250/M8 II2GD R02 en...
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Page 2: Table Of Contents
4.4 Grounding and equipotential bonding................17 5 Operation 5.1 Start-up........................... 18 5.2 Operation ........................18 5.3 Electrostatic charge ....................... 18 6 Service 6.1 Maintenance ........................19 6.2 Dismantling ........................19 www.krohne.com 05/2018 - 4005351602 - AD DK37/H250/M8 II2GD R02 en... -
Page 3: Safety Instructions
The "X" after the certificate number refers to special conditions for safe use of the device, which have been listed in these instructions. If needed, the IEC certificate can be downloaded from the manufacturer's website. 05/2018 - 4005351602 - AD DK37/H250/M8 II2GD R02 en www.krohne.com... -
Page 4: Safety Instructions
The operator or his agent is responsible for observing any additional standards, directives or laws if required due to operating conditions or place of installation. This applies in particular to the use of easily detachable process connections when measuring flammable media. www.krohne.com 05/2018 - 4005351602 - AD DK37/H250/M8 II2GD R02 en... -
Page 5: Device Description
Figure 2-1: Available indicators 1 Indicator M8E.: one signal output 4...20 mA with a bargraph indicator 2 Indicator M8M.: up to two separately adjustable electrical limit switches 05/2018 - 4005351602 - AD DK37/H250/M8 II2GD R02 en www.krohne.com... -
Page 6: Description Code
Limit switch (M8MG version) Limit switch (M8MG version) Limit switch (M8MG version) K1 - one limit switch K2 - two limit switches 7 Version Version Version Version Ex - explosion-protected version www.krohne.com 05/2018 - 4005351602 - AD DK37/H250/M8 II2GD R02 en... - Page 7 Limit switch (M8M version) Limit switch (M8M version) Limit switch (M8M version) K1 - one limit switch K2 - two limit switches * positions which are not needed are omitted (no blank positions) 05/2018 - 4005351602 - AD DK37/H250/M8 II2GD R02 en www.krohne.com...
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Page 8: Marking
• AC - article code Additional plate The association of the housing cover to the device is confirmed by an additional plate with the serial number on the interior of the indicator part. www.krohne.com 05/2018 - 4005351602 - AD DK37/H250/M8 II2GD R02 en... -
Page 9: Flammable Products
Definition of zone 21 according to EN 1127-1, Appendix B: An area in which an explosive atmosphere may occasionally occur in the form of a cloud of flammable dust in the air under normal operation. 05/2018 - 4005351602 - AD DK37/H250/M8 II2GD R02 en www.krohne.com... -
Page 10: Types Of Protection
For the equipment category II 2 D and EPL Db, connection to an intrinsically safe circuit with protection level "ib" is required. When connecting the variable area flowmeter to an intrinsically safe circuit with protection level "ia", a higher protection level is given. www.krohne.com 05/2018 - 4005351602 - AD DK37/H250/M8 II2GD R02 en... -
Page 11: Ambient Temperature / Temperature Classes / Product Temperature
[°C] [°F] [°C] [°F] +104 +158 +185 +104 +122 +185 +140 +167 +104 +100 +212 +100 +212 +194 +122 +203 +100 +212 +149 +140 +167 +100 +212 +149 +100 +212 05/2018 - 4005351602 - AD DK37/H250/M8 II2GD R02 en www.krohne.com... - Page 12 +140 +145 +293 +200 +392 +155 +311 +149 +125 +257 +190 +374 +130 +266 1 Temperature resistance of the cable ≥ +80°C 2 Temperature resistance of the cable ≥ +176°F www.krohne.com 05/2018 - 4005351602 - AD DK37/H250/M8 II2GD R02 en...
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Page 13: Surface Temperature For Equipment Category Ii 2 D
Also, when operating the variable area flowmeter outside of the hazardous area, the connection must be made to an intrinsically safe circuit. When connecting to non-intrinsically safe circuits, there is a risk of damage to the safety- defining components. 05/2018 - 4005351602 - AD DK37/H250/M8 II2GD R02 en www.krohne.com... -
Page 14: Installation
Ambient temperature / temperature classes / product temperature information refer to on page Surface temperature for equipment category II 2 D 11 and refer to on page 13 and refer to Electrical data on page 13. www.krohne.com 05/2018 - 4005351602 - AD DK37/H250/M8 II2GD R02 en... -
Page 15: Electrical Connections
(plastic PG 3...7 mm / 0.12...0.28", metal PG 6...10 mm / 0.24...0.39"). • Unused cable entries are to be closed (>IP66/67). Ensure that the gaskets and incised gasket ring are tight. 05/2018 - 4005351602 - AD DK37/H250/M8 II2GD R02 en www.krohne.com... -
Page 16: Power Supply
The terminal assignment of the built-in electrical equipment is described in the product documentation. The signal circuits of the variable area flowmeters may only be connected to certified intrinsically safe slave units or circuits. For more information refer to chapter "Electrical data". www.krohne.com 05/2018 - 4005351602 - AD DK37/H250/M8 II2GD R02 en... -
Page 17: Grounding And Equipotential Bonding
Any existing cable shields and all cores that are not used must be carefully insulated against each other and against ground (test voltage ≥ 500 V ) according to applicable installation regulations (EN 60079-14). 05/2018 - 4005351602 - AD DK37/H250/M8 II2GD R02 en www.krohne.com... -
Page 18: Operation
• spraying of electrons (e.g. in the vicinity of electrostatic painting systems) or • pneumatically conveyed dust is exposed. CAUTION! Electrostatic charging of the housing surface by friction must be avoided. The devices must not be dry cleaned. www.krohne.com 05/2018 - 4005351602 - AD DK37/H250/M8 II2GD R02 en... -
Page 19: Service
In the case of environmentally critical or hazardous products, appropriate safety precautions • must be taken with regard to residual liquids in the measuring unit. New gaskets have to be used when re-installing the device in the piping. • 05/2018 - 4005351602 - AD DK37/H250/M8 II2GD R02 en www.krohne.com... - Page 20 • Process Analysis • Services Head Office KROHNE Messtechnik GmbH Ludwig-Krohne-Str. 5 47058 Duisburg (Germany) Tel.: +49 203 301 0 Fax: +49 203 301 10389 info@krohne.com The current list of all KROHNE contacts and addresses can be found at: www.krohne.com...
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