SKF CMSS 785 Series Скачать руководство пользователя страница 32 | Manualshive

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SKF CMSS 785 Series Скачать руководство пользователя страница 32

6.3 Troubleshooting

Symptom

Possible cause

Investigative/corrective actions

Output is 0 V and unchanging.

Power is not ON.

Turn the power ON. Check directly at the driver terminals
that the correct supply voltage is present.

The driver is not connected properly.

Refer to 5.3 “Making connections to the monitoring sys-
tem”, and wire correctly.

The driver is faulty.

If practical, verify by substituting a known good unit of the
same system length and if found necessary, replace the
driver.

Output is approximately -0.6 V and unchanging.

The target is outside the measurement
range.

Check the physical positions of the probe/target and if
necessary adjust to obtain a suitable, in range, gap
voltage.

Probe failure, or the probe cable is
shorted or
disconnected.

Disconnect the probe/extension cable from the driver and
then measure the resistance between the connector cen-
tral pin and the outer conductor/connector shell.

Normal/expected values:

Sensor coil resistance: approx. 5,5 Ω +
Sensor cable resistance: approx. 0,25 Ω/m

If an abnormal reading is obtained, inspect the probe and
cable for damage. If appropriate repeat the measurement
at the probe connector, and replace the probe/extension
cable as found necessary (see also next test).

The extension cable is shorted or
disconnected.

With the extension cable disconnected from both probe
and driver, measure the resistance of the extension cable
(end to end and connector pin to shell).

Normal/expected values:

Center conductor resistance: Approx. 0,25 Ω/m Outer
conductor resistance: 0 Ω
Center pin to outer conductor resistance: ∞Ω

If an abnormal reading is obtained, replace the extension
cable.

Poor connection (probe/extension cables). Disconnect the probe/extension cable connectors, and

check that there is no dirt or debris trapped in the connec-
tors. Refit/retighten, by hand, and re-sleeve probe/exten-
sion cable connectors.

The driver is faulty.

If practical, verify by substituting a known good unit of the
same system length and if found necessary, replace the
driver.

Output is approximately -22 V and unchanging.

The target is beyond the possible meas-
urement range.

Check the physical positions of the probe/target and if
necessary adjust to obtain a suitable, in range, gap
voltage.

The driver is faulty.

If practical, verify by substituting a known good unit of the
same system length and if found necessary, replace the
driver.

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Содержание CMSS 785 Series

Страница 1: ...User manual Eddy Current Probe Systems CMSS 785 Series API 670 Proximity transducers 5 and 8 mm...

Страница 2: ...ut also in respect of other instrumentation and equipment connected to this unit For safety it is necessary to be familiar with safe working practices and proce dures appropriate to the installation s...

Страница 3: ...life 31 6 3Troubleshooting 32 7 Information about intrinsically safe applications 33 7 1 CSA Installation 33 7 1 1 System drawing 33 7 1 1 System drawing cont 34 7 1 2 Label information 34 7 2 ATEX In...

Страница 4: ...4 4...

Страница 5: ...se cautions and to follow the guidance provided WARNING This symbol is used to warn of the possibility of injury Always follow the instructions to ensure safety CAUTION This symbol is used to draw att...

Страница 6: ...other than those with insulation resistance and voltage endurance specifications indicated Doing otherwise may damage the unit If performing a megger test insulation test of the signal trans mission c...

Страница 7: ...circa 1 MHz that radiates from a coil encapsulated in the probe tip As a conductive surface approaches the coil eddy currents are generated on the target and this in turn causes a detectable decrease...

Страница 8: ...e system Only the component combinations shown in the graphic below are allowed CMSS 75 or CMSS 78 probe CMSS 985 extension cable System cable length CMSS 785 driver A B C 0 5 m 4 5 m 5 m CMSS 785 11...

Страница 9: ...cal length of probes and cables may be longer than but not shorter than the nominal length 3 1 1 Probes 5 mm C M S S 7 5 CMSS 75 5 mm probe Armor L Without armor A With armor without fluoro resin coat...

Страница 10: ...7 Connector Sensor tip Lock nut Threaded area CMSS 75 L standard probe without armour Example CMSS 75 AU1 02 10 05 5 mm armour thread size UNF 1 4 28 unthreaded length L1 0 2 in case length L2 1 0 in...

Страница 11: ...hreaded length if M2 10 mm increments 0 230 mm L1 L2 20 mm e g 06 60 mm Unthreaded length if U2 0 1 inch increments 0 9 2 in L1 L2 0 7 inches e g 04 0 4 inches Case length if M2 10 mm increments 20 25...

Страница 12: ...k nut Threaded area CMSS 78 L standard probe without armour Example CMSS 78 AM2 04 20 90 8 mm diameter probe armoured M10x1 thread unthreaded case length L1 40 mm case length L2 200 mm pigtail cable l...

Страница 13: ...1 L2 L3 Example CMSS 78 RM2 05 03 05 8 mm probe reverse mount thread size M10x1 unthreaded length L1 5 mm case length L2 30 mm 03 30 mm cable length L3 0 5 m CMSS 78 RU2 02 12 90 8 mm probe reverse mo...

Страница 14: ...0 28 8 6 0 34 CMSS 985 L extension cable without armour CMSS 985 A extension cable with armour Connector Cable Connector Connector Cable Flexible armour Connector Extension cables Example CMSS 985 L 4...

Страница 15: ...mm mount 2 Screw mount multi pitch 50 8 50 8 mm and 92 31 mm CMSS 785 11 CMSS 785 21 Unit mm 29 1 14 35 1 4 32 1 26 40 1 57 72 2 8 6 0 24 68 2 7 Terminal block Sensor input connector Mounting plate C...

Страница 16: ...ay operation can adversely affect the unit We recommend using separate wiring ducts Allow sufficient space in housings etc to respect the minimum allowed bend radius of the probe and extension cables...

Страница 17: ...ix B the effect that the precise nature of the target operating environment etc can have on the system output characteristic is quantified by way of examples B1 through B9 Further guidance on the inst...

Страница 18: ...If they are placed too close together the probes will interfere with each other 20 mm or more 30 mm or more 40 mm or more Target Target For the preferred detailing of the probe mounting refer to the i...

Страница 19: ...t plate around the sensor tip is chamfered it will be affected by the attachment plate If the target and the sensor tip are not parallel dimen sion X1 and X2 are not the same it will affect the readin...

Страница 20: ...S1 JEIDA Japanese Electronic Industry DevelopmentAssociation JEIDA 29 1979 CLASS S1 Hydrogen sulfide 0 01 ppm or less NOx gas 0 05 ppm or less Ambient temperature 25 C 5 C humidity 40 to 80 RH Instal...

Страница 21: ...to allow sufficient space between the driver and the enclosure walls for the probe cable connection to the driver and also allow an appropriate spacing between drivers for the monitor cabling 60 mm O...

Страница 22: ...be suitable for both the driver and the monitor terminals typical availability 0 5 0 75 or 1 0 mm2 nom inal cross sectional area The conductor should be twisted sev en strand or greater CAUTION The d...

Страница 23: ...ove beyond the linear range of the measurement system When using a gap feeler gage insert between the senor tip and target to measure the gap Adjust the probe to a position where the gage just moves f...

Страница 24: ...age and or electrical Section 5 4 methods to verify the probe to target gap 5 1 1 When using the CMSS VZ 03A bracket 1 Attach the CMSS VZ 03A bracket to the mount body machine and temporarily attach w...

Страница 25: ...0A sensor sleeve 3 Attach the CMSS VZ 10A sensor sleeve to the mounting machine casing 4 Adjust the gap between the probe and the target 5 Lock the sleeve in position 6 Verify the final probe to targe...

Страница 26: ...Cutting either the probe or the extension cable to a shorter length will result in a measurement system that no longer conforms with the specification Never use vinyl tape to insulate During extended...

Страница 27: ...lly only tighten the connector by hand If it is tightened using a tool there is a risk that the connector may be damaged Cutting either the probe or the extension cable to a shorter length will result...

Страница 28: ...n section 4 1 4 for further details 5 2 2 Installation of DIN rail mount drivers The CMSS 785 rail mount versions are designed to be mounted on a 35 mm DIN rail Install according to the following step...

Страница 29: ...e recommend using cables of the type described in 4 3 Connections to the Monitoring System between the unit and monitor As a small signal is being transmitted inferior cables may be subject to interfe...

Страница 30: ...terminals 2 3 Use a DVM to confirm the DC voltage measured at the driver s output terminals 3 If the probe is to be gapped adjusted 3 1 Loosen the jam nut of the probe 3 2 Adjust the probe position so...

Страница 31: ...cement desirable In the flowchart below a system calibration check output voltage against static gap at incremental positions across the working range provides the base line data on which to judge the...

Страница 32: ...age If appropriate repeat the measurement at the probe connector and replace the probe extension cable as found necessary see also next test The extension cable is shorted or disconnected With the ext...

Страница 33: ...tus unspecified except that it must not be supplied from nor contain under normal or abnormal conditions A source of potential with respect to earth in excess of 250 V RMS or 250 V DC WARNING SUBSTITU...

Страница 34: ...7 1 1 System drawing cont 7 1 2 Label information The label is applied to the driver module case 34 34...

Страница 35: ...7 2 ATEX Installation 7 2 1 System drawing 7 2 2 Applicable standards ATEX EN 60079 0 2012 A11 2013 EN 60079 11 2012 35 35...

Страница 36: ...7 2 3 Label information XXX represents the year of manufacture eg 2015 is written in the part of if the production is manufactured in 2015 The label is applied to the driver module case 36 36...

Страница 37: ...ion cables Sensor tip diameter Approximately 5 mm and 8 mm System cable length 5 or 9 m Maximum cable tension 98 1 N 10 kgf Minimum bend radius 30 mm without armoured cable 50 mm with armoured cable J...

Страница 38: ...A1 Frequency response graph 2 0 0 0 2 0 4 0 6 0 8 0 10 0 10 100 1 000 10 000 100 000 Magnitude dB Frequency Hz 3 15 Vp p 400 m p p 10 Vp p 38 38...

Страница 39: ...er supply and target condition influences B1 Standard static characteristic Target material SCM440 flat face dia 15 mm or more Nominal Scale Factor SCF is 7 87 mV m 200 mV mil 24 20 16 12 8 4 0 0 0 0...

Страница 40: ...characteristics 5 m system 24 20 16 12 8 4 0 0 0 0 5 1 0 1 5 2 0 2 5 Output V Gap mm 10 5 0 5 10 0 0 0 5 1 0 1 5 2 0 2 5 SCF error Gap mm LIN of F S 4 2 0 2 4 0 0 0 5 1 0 1 5 2 0 2 5 Gap mm 35 C 0 C...

Страница 41: ...0 0 5 1 0 1 5 2 0 2 5 Output V Gap mm 10 5 0 5 10 0 0 0 5 1 0 1 5 2 0 2 5 SCF error Gap mm LIN of F S 4 2 0 2 4 0 0 0 5 1 0 1 5 2 0 2 5 Gap mm 35 C 0 C 25 C 45 C 65 C B3 Driver temperature characteris...

Страница 42: ...B4 Effect due to driver supply voltage variation 24 22 20 18 16 14 12 10 8 6 4 2 0 0 0 0 5 1 0 1 5 2 0 2 5 Output V Gap mm 18 V 20 V 22 V 24 V 26 V 42 42...

Страница 43: ...B5 Response to different target materials 24 22 20 18 16 14 12 10 8 6 4 2 0 0 0 0 5 1 0 1 5 2 0 2 5 Output V Gap mm SCM440 SNCM439 S45C SUS304 Probe Target Gap 43 43...

Страница 44: ...B6 Effect due to target diameter Target material SCM440 24 22 20 18 16 14 12 10 8 6 4 2 0 0 0 0 5 1 0 1 5 2 0 2 5 Output V Gap mm D D 20 mm D 15 mm D 10 mm Probe Target D 44 44...

Страница 45: ...B7 Effect of a curved target surface Target material SCM440 24 22 20 18 16 14 12 10 8 6 4 2 0 0 0 0 5 1 0 1 5 2 0 2 5 Output V Gap mm D D 20 mm D 15 mm D 10 mm Probe Target D 45 45...

Страница 46: ...B8 Effect due to abrupt target edge Target material SCM440 24 22 20 18 16 14 12 10 8 6 4 2 0 0 0 0 5 1 0 1 5 2 0 2 5 Output V Gap mm X X 9 mm X 7 5 mm X 5 mm X 0 mm Probe Target X 46 46...

Страница 47: ...16 14 12 10 8 6 4 2 0 0 0 0 5 1 0 1 5 2 0 2 5 Output V Gap mm X X 12 mm X 9 mm X 7 5 mm X 5 mm Probe Target Side wall X Gap B9 Effect due to the proximity of a side wall Target and side wall material...

Страница 48: ...ble racks Good example Transmission cable 3 wire shielded cable Power line or control line Conduit pipe Power line Signal line Conduit pipe Conduit pipe Signal transmission cable 3 wire shielded cable...

Страница 49: ...49 49...

Страница 50: ...to the sensing device the interconnect cabling junction boxes if any and the communications inter face must consist only of SKF supplied or SKF approved devices and or components The computer provide...

Страница 51: ...lteration or main tenance neglect excessive operating condi tions or for defects caused by or attributable to the Buyer including without limitation Buyer s failure to comply with any written instruct...

Страница 52: ...opyright of the publisher and may not be reproduced even extracts unless prior written permission is granted Every care has been taken to ensure the accuracy of the information contained in this publi...

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