MODEL: B6U

B6U SPECIFICATIONS

ES-7451 Rev.20 Page 2/6

http://www.m-system.co.jp/

LCD DISPLAY (option)

Features:

· Setting and display of input signals, engineering units and

the transmitter operating status, etc.

· Removable while the module is powered.

Display size: 36 × 20 mm (1.42” × 0.79”)

Characters

Color: Black

Format:

• 2 rows of 5 alphanumeric characters:

Top row: 7.4 mm high;

Bottom row: 6.5 mm high,

• Status indicators and engineering units

For detail of the LCD panel indication, refer to the

instruction manual.

Display range: -99999 to 99999

Decimal point: In top row

Read rate: 150 msec.

Back light: None

INPUT SPECIFICATIONS

The input type is factory-set to K thermocouple, and the

input range to 0 to 100°C.

See Table 1 for the available input type, the minimum span,

and the maximum range.

■ DC mV & V

Input resistance: ≥ 1 MΩ

■ Thermocouple

Input resistance: ≥ 1 MΩ

Burnout sensing: 130 nA ±10 %

■ RTD (2-wire, 3-wire or 4-wire)

Input resistance: ≥ 1 MΩ

Allowable leadwire resistance: Max. 20 Ω per wire

■ Resistance (2-wire, 3-wire or 4-wire)

Excitation: 0.2 mA ±10 %

Allowable leadwire resistance: Max. 20 Ω per wire

■ Potentiometer

Excitation: 0.2 mA ±10%

Allowable leadwire resistance: Max. 20 Ω per wire

OUTPUT SPECIFICATIONS

Output range: 4 – 20 mA DC

Operational range: 3.8 – 21.6 mA

Load resistance vs. supply voltage:

Load Resistance (Ω) = (Supply Voltage (V) – 12 (V))

÷ 0.024 (A)

(including leadwire resistance)

INSTALLATION

Supply voltage

· 12 – 42 V DC (non-approved)

· 12 – 28 V DC (approved)

Operating temperature:

· Non-safety-approved unit: -40 to +85℃ (-40 to +185°F)

· Safety-approved unit: See Safety Parameters for use in a

hazardous location.

· LCD display (full visibility): -30 to +80℃ (-22 to +176°F)

Operating humidity: 0 to 95 %RH (non-condensing)

Weight: 150 g (0.33 lb) including the LCD

PERFORMANCE

Accuracy: See Table 1 and ‘Explanations of Terms.’

Cold junction compensation error: ±0.5℃ (±0.9°F)

Temp. coefficient: ±0.015 %/°C (±0.008 %/°F) of max. span

at -5 to +55°C [23 to 131°F]

Start-up time: Approx. 8 sec.

Response time: ≤ 2 sec. (0 – 90 %) with damping time

set to 0 and when not communicating via HART.

Supply voltage effect: ±0.003 % × [Output Span] / 1 V

Insulation resistance: ≥ 100 MΩ with 500 V DC

Dielectric strength: 1500 V AC @1 minute (input to output)

Safety integrity level: Suitable for use in a safety

instrumented system up to SIL1 or SIL2 if appropriate safety

instructions are observed. Consult M-System.

EXPLANATIONS OF TERMS

■ ACCURACY

This transmitter’s accuracy is theoretically defined as the

addition of A/D and D/A conversion errors:

Accuracy = A/D Conversion Error + D/A Conversion Error

The A/D conversion error means that measured as HART

signal which is A/D converted from the analog input signal.

The D/A conversion error of this transmitter is relatively

very small so that it does not really affect the unit’s overall

performance.

The “Accuracies” given in Table 1 therefore equals the A/D

conversion error.

The temperature drift (coefficient) or the cold junction

compensation error is not included in the “Accuracy.”

■ CALCULATION EXAMPLES OF OVERALL ACCURACY IN %

• DC Voltage

1) 0 – 200 mV

Absolute value accuracy (Table 1): 40 μV

40 μV ÷ 200000 μV × 100 = 0.02 % < 0.1 %

➠ Overall accuracy = ±0.1% of span

2) 0 – 4 mV

Absolute value accuracy (Table 1): 10 μV

10 μV ÷ 4000 μV × 100 = 0.25 % > 0.1%

➠ Overall accuracy = ±0.25 % of span

• Thermocouple