© KROHNE 01/2004 7.02228.23.00 GR Installation and Operating Instructions BM 100 A Reflex-Radar Variable area flowmeters Vortex flowmeters Flow controllers Electromagnetic flowmeters Ultrasonic flowmeters Mass flowmeters Level measuring instruments Communications engineering Engineering systems & solutions Switches, counters, displays and recorders Heat metering Pressure and temperature Subject to change without notice.
Contents 1 1.1 1.1.1 1.1.2 1.1.3 1.2 1.3 1.3.1 1.3.2 1.3.3 1.3.4 1.3.5 Mechanical installation......................................................................................................... 6 Handling and storage .............................................................................................................. 6 Avoiding blows ........................................................................................................................ 6 Avoiding bending.....................
General advice on safety The device will normally weigh between approx. 11 kg / 25 lb and 35kg / 77 lb. Carry the device using two people, lifting it by the flange holes and supporting the probe. Lifting gear may also be used but no attempt should be made to lift the device by the probe. Range of applications The BM 100 A TDR Level gauge measures the level and volume of liquids and liquid gases. It can also measure the level and volume of pastes, powders, slurries and granular products.
Principal gauge components Non-Ex version Ex version 1 Cable entry (output) 2 Cable entry (power supply) 3 Local user interface (display screen, buttons and magnetically-actuated hall sensors) 4 Nameplate (see diagram on the following page) 5 Flange 6 Single cable probe 7 Counterweight 8 Twin cable probe 9 Spacer 10 Short-circuit 11 Equipotential bonding system connection (Ex) 12 Isolating chamber – separates electronics housing from hazardous products 13 Pressure release plug (1
Standard nameplate Items supplied • • • signal converter connected to a cable, coaxial or rod signal guidance probe Optional: remote extension with wall support, sunshade (with fastening material in each case) bar magnet for operator control / parameter assignment (only in version with local display) wrench for the covers Documentation supplied • • installation instructions: detailed user manual and reference book. approval documents, unless reproduced in the installation and operating instructions.
1 Mechanical installation 1.1 Handling and storage Caution : The probe is a critical gauge component. Do not damage– Handle with care!!! 1.1.1 Avoiding blows Avoid hard blows, impacts and jolts when handling the BM 100 A. Caution : fragile electronics 1.1.2 Avoiding bending Rod/ Coaxial probes: support the probe to avoid bending. Support probe here 1.1.3 Avoiding cable kinks or fraying Do not coil the cable less than 400mm / 16” in diameter. Cable kinks or fraying will cause measurement errors.
1.2 Installation restrictions Hazardous-duty systems (Ex, FM…): • refer to the supplementary instructions for gauges approved for use in hazardous locations before installation. • check that the flange, gasket and probe materials are compatible with the product. Read the information given on the converter nameplate, the flange markings and specifications in the approval certificates. 1.3 Mounting on a tank 1.3.
Nozzles extending into tank Caution: Do not use nozzles that extend into the tank. This will block the emitted pulse. Process connection For the gauge to make accurate measurements: • the tank process connection must be level.
Probe Type Single (types F, H and K) Twin (types A, B, G and L) Coaxial (type D) Recommended minimum distance of probe from objects inside the tank in millimetres / inches 300 / 12 100 / 4 0/0 Electromagnetic field shape around probe, by type (not to scale) Single (types F, H and K) Twin (types A, B, G and L) Coaxial (type D) Ø28 mm / Ø2.4 in No beam angle for any probe type.
Process connection and entry pipe Caution: Do not put the nozzle close to the entry pipe. Pouring the product directly onto the probe will give false readings. Install deflector plate if impossible to distance gauge from entry pipe. Stilling wells Tanks with floating roofs for petrochemical applications: see also section 1.3.4.
1.3.3 Installation instructions: Gauge - all applications BM100 A gauges are designed to be mounted on a suitable process connection on a tank or sump. Install the gauge using two people to avoid damaging the probe. Support the housing and the probe. Gauge installation: Cable probe types: B, H, K & L 1 2 Caution : Do not over-bend probe! Inserting the probe: hold more than one metre above the opening to avoid cable bending.
Cable probes: entanglement and straightness The cable must be straight once inserted into the tank. The cable counterweight should not touch the bottom of the tank. The cable must be far from objects (e.g. agitators) to avoid entanglement. Rigid length of single and twin cable probes Cable diameter Rigid length Single cable Ø4mm or 0.15” 145mm or 5¾” Ø8mm or 0.3” 200mm or 8” Twin cable Ø4mm or 0.15” 145mm or 5¾” Ø6mm or 0.24” 145mm or 5¾” 1.3.
1 2 3 4 5 Turnbuckle Chuck for type H Ø4 single cable probe Counterweight with threaded base Avoid play between tube and probe Hole in welded tube for drainage Anchoring twin rod and coaxial probes 1.3.
Traction forces during emptying cycles for powder applications Traction load is dependent upon the height and shape of the tank, product particle size & density, and the rate at which the tank is emptied. The table below gives the load at which cable probes will break. Cable maximum design loads (traction) Probe Type K : Single cable Ø8 mm / Ø 0.3” Type B : Twin cable Ø6 mm / Ø 0.2” Maximum Load 3.5 T / 7700 lb 3.6 T / 7900 lb (1.
2 Electrical Connections 2.1 Insulation rating The gauge transmitter electrical insulation conforms to IEC 1010-1. Please note the information below concerning each rating category. Category Rating Comments Power supply overvoltage category III The gauge does not have an integrated switch or circuitbreakers. These elements must be installed in conformance to local regulations and EU Low Voltage Guidelines and to properly isolate the equipment when necessary.
2.2 Electrical installation instructions 2.2.1 Wiring general notes Read these instructions carefully Wiring must comply with any existing local regulations. Use appropriate wiring methods, conduits and fittings to maintain a NEMA 6-6P / IP67 rating. 1. Always disconnect the mains power supply before opening the housing, 2. unscrew the terminal compartment using the special wrench provided, 3. use the top cable entry port for the power supply (see “Principal gauge components”), 4.
2.2.2 Wiring connections Open the signal converter housing rear cover, using the plastic wrench supplied. The terminal connections are labelled. The standard connections are shown below: Before starting to wire: • • check that the power supply corresponds to the power board installed and check which output option you have selected. This information will be indicated on the underside of the rear housing cover and on the gauge nameplate.
Terminal layout: Ex version (X) = Terminal not used except for RS485 outputs Wiring the gauge for use in hazardous areas (Ex & FM) Use the correct wires and spade tags for terminal connections as specified in the Supplementary Installation and Operating Instructions for the BM100 A/Ai KEMA 01 ATEX 1078X Gauge.
Options, output The output wires should be wired to the gauge terminals according to the type of output selected when the order was placed. The type of output supplied will be indicated on the gauge nameplate and a sticker on the inside of the housing rear cover.
• • 1 RS 485 output with / without optional passive analogue current output for direct readings** PROFIBUS PA output & optional* with / without optional passive analogue current output for direct readings** * BM 100 A device management: a GSD file providing a device communication features list is delivered with PROFIBUS PA-output devices ** must be specified in customer order 20 Installation and operating instructions BM 100 A
3 User Interface The BM 100 A may be configured and operated using a user interface set into the signal converter housing or a remote link. 3.1 Power On and self-test mode The BM 100 A automatically self-tests once connected to a power source. The screen readout shown on the left will be displayed. This test takes from 20 seconds to 1½ minutes to complete. The local display will then switch over to the operation mode display shown below.
3.3 Status Markers This line of numbers identifies six types of errors by means of a triangular indicator over the number concerned - see item 9 on the preceding page. Status marker number ▼1 ▼2 ▼3 ▼4 ▼5 ▼6 3.4 Error / Status message Result and action No initial pulse detected No level reflection detected Level measurement frozen See section 3.4: Fault clearing. See section 3.4: Fault clearing.
4 BM 100 A technical data 4.1 Technical data Input Measured variable Measurement range Distance, level, liquid interface and volume Variable according to probe type, see Equipment architecture, section 4.2 Variable according to probe type, see Probe measurement limits Blocking Distance Output Analogue 4 … 20 mA (3.8 … 20.5 mA according to NAMUR 043), 1 passive output (as standard) Load Active outputs 350 ohms maximum Passive outputs (U-8)/22.
Power supply Option 1 Option 2 Process Process temperature, flange 24 V DC / AC, +10%/-15%, Power used: 9W 100 – 240 V AC, +10%/-15%, Power used: 9W -30 to +150°C / -22°F to 298°F, option 200°C / 392°F See BM100 A / Ai Supplementary Instructions for Ex values. Process pressure, standard -1 to +40 bar / -14.
(Liquid only) ≤ 3 m / 10ft* 1.8 ≤ 30 m / 98.5ft* 1.8 DN50 PN10/16 2”ANSI 150lbs 2½ ”G / 2½ ” NPT** SS316/316L Level and Interface Range, max.
Installation and operating instructions BM 100 A Twin cable Ø6mm (B) 200 mm / 8” Free area (diameter) Gauge illustration D45x245 (316L) D90x100 (316L) Turnbuckle (316L) Without** Counter -weight molded on cable Spacer material FEP Probe (Type code) Coaxial Ø28 (D) 200 mm / 8” None No spacer Single cable Ø4mm (H) Single rod Ø10mm (F) 600 mm / 24” 200 mm / 8” 600 mm / 24” None 600 mm / 24” D45x245(316L) D12x1500(316L) Turnbuckle (316L) Without** No spacer Single cable Ø8mm (K) Powde
4.3 Probe measurement limits Probe measurement limits Top dead Bottom dead zone, A1 zone, A2 εr = 80* εr = 80* 250 mm / 9.8” 20 mm / 0.8” Top dead zone, A1 εr = 2.4* 330 mm / 13” Bottom dead zone, A2 εr = 2.4* 100 mm / 3.9” Probe type Twin rod Ø10 mm or 0.4” (type A) Twin cable Ø6 mm 250 mm / 9.8” 20 mm / 0.8” 330 mm / 13” 100 mm / 3.9” or Ø0.24” (type B) Twin cable Ø4 mm 250 mm / 9.8” 20 mm / 0.8” 330 mm / 13” 100 mm / 3.9” or Ø0.16” (type L) Coaxial Ø28 mm 0 mm / 0” (**) 10 mm / 0.
4.4 Gauge dimensions The drawing below illustrates the complete set of standard gauge configurations and overall dimensions. Housing Non-Ex version Ex version Probe A Twin Rod Ø10(0.4) B Twin Cable Ø6(0.24) Standard counterweight N/a Ø45x245 (Ø1¾x9½) L Twin Cable Ø4(0.16) Ø45x60 (Ø 1¾x2½) D Coaxial Ø28(1.1) N/a H Single Cable Ø4(0.16) K Single Cable Ø8(0.31) Ø25x100 Ø12x100 (Ø1x4) (ؽx4) Dimensions in mm (inches) 28 F Single Rod Ø10(0.4) N/a G Reverse Ø10(0.
If you need to return a device for testing or repair to KROHNE Your instrument has been carefully manufactured and tested. If installed and operated in accordance with these operating instructions, it will rarely present any problems.
