The Thermo Scientific* CM515 and HME900 density converter electronics provide an optimum data processing solution.
Thermo Scientific density meters or specific gravity analyzers are available with either a HART compatible, field-mounted density converter or a control room based unit. Both instruments provide high integrity calculations of density and density related variables to ensure effective custody transfer and process optimization.
Thermo Scientific HME900
The durable HME900 head-mounted density converter may be included with any Thermo Scientific liquid or gas density meter or specific gravity analyzer. This unit conditions the output signal to provide a HART compatible 4-20 mA signal that can be connected directly to the user's DCS or it can be read digitally. An optional local display enables viewing of the prime variable value either in engineering units alone or with an alternating display of percent of
chosen span. The HME900 is ideal for most general density measurement applications and where HART communications are required.
Thermo Scientific CM515 (formerly CM200)
The versatile CM515 density converter accepts inputs from Thermo Scientific density meters. This easy-to-use device derives density at reference conditions, calculates density derived parameters and is compatible with a wide range of density meter pulse outputs. Parameters and calibration data can be monitored using either the RS232 or RS485 interface option. The CM515 is best suited to applications that require a greater degree of input/output flexibility
than offered by the HME900 or when HART compatibility is not required.
- High accuracy calculations
- Choice of field or control room installation
- Flexible input into user DCS
- Extensive range of standard calculations
- Customer defined function (CDF) for non-standard calculation
Compatible with: Thermo Scientific FD910, FD950 and FD960 Liquid Density Meters, Thermo Scientific FD900, ID900 and PD900 Gas Density Meters, Thermo Scientific SG901 Specific Gravity Analyzer
Certifications: ATEX and CSA/US; Compliant with CE Mark, Electromagnetic Compatibility (EN61326:1997), Low Voltage Directive,
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Specifications
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Physical Specifications
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Dimensions/Weight
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Fits into the standard Thermo Scientific density meter terminal/amplifier enclosure
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Local/Display (Optional)
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4.5 digit 7.6mm (0.3 in.) 7 segment LCD display; Resolution 0.1% or 0.01% depending on display variable
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Cable
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Without pressure option: two pairs; With pressure option: three pairs
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Environmental Rating
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As density meter: IP65 (NEMA 4X)
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Ambient Temperature Range
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-20° to +60°C (-4° to +140°F)
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Ambiient Humidity
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Up to 95% non-condensing
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Data Storage
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Configurations settings and data retained in e2 non-volatile storage
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Connections
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Screw terminals suitable for wire sizes to 1.5mm2 (0.06 in.2)
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Communications
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Uses HART communications protocol; WinHME900 PC configuration program; Handheld communicator (e.g. Emerson 375 Field Communicator)
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Power
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Without pressure option: two loops 24V 23mA; With pressure option: maximum three loops 24V 23mA
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Functional Specifications
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Inputs
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Temperature (PT100 RTD): Range: -200° to +200°C (-328° to 392°F); Resolution: better than 0.0015%; Accuracy at +20°C (+68°F) reference: ±0.1°C (±0.18°F); -200° to +200°C (-328° to +392°F) ±0.05°C (±0.09°F); 0° to +200°C (+32° to +392°F); Drift -20° to +50°C (-4° to +122°F): ±0.05°C (±0.09°F) typical,
±0.01°C (±0.018°F) max
Pressure (4 to 20mA): Resolution: better than 0.01%; Accuracy at 20°C (68°F) reference: better than 0.1% point; Drift -20°C to +50°C (-4°F to +122°F): ±0.1% typical, ±0.2% max
Period (current pulse 6 to 18mA) Range: 10ms to 250µs (100Hz to 4000Hz); Standard range: 2500µs to 250µs (400Hz to 4000Hz); Resolution: ±2ns; Accuracy at reference +20°C (+68°F): as resolution; Drift -20°C to +50°C (-4°F to +122°F): ±25 ppm typical; ±50 ppm max
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Outputs
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4 to 20mA HART: Operating voltage: 8 to 28VDC at terminals; Resolution: 0.015% span; Accuracy at reference +20°C (+68°F): ±0.1% of point; Drift -20°° to +50°C (-4° to +122°F): ±0.08% full scale typical; ±0.175% full scale max
Local Display: Selection of engineering units only, or engineering units and percent full scale switching every 5 seconds
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Other Input/Output
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Density Supply Operating voltage: 10 to 28VDC at terminals; Current: modulated at density meter frequency 6 to 18 mA
Enclosure Temperature (PCB mounted 100 ohm PRT): Accuracy: ±0.5% point; Range: -40° to +80°C (-40° to +176°F); Alarm points: -20° to +60°C (-4° to +140°F)
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