Smart Gauge & Absolute Pressure Transmitter MDM7000-GP/AP Series

Overview

The MDM7000-GP/AP Smart Pressure Transmitter is a versatile and highly accurate device designed for various applications, including chemical, oil and gas, pulp and paper, electric power, metallurgy, energy, food and beverage, medical and health, and general process industries. It offers reliable performance and precise measurements, making it an ideal choice for demanding environments.

Accuracy and Performance

Reference Accuracy

• Best fit straight line (BFSL), hysteresis, and repeatability are included.
• Calibration temperature: 20℃ ±5℃.

GP Accuracy

• TD ≤ 5: ±0.1% (0.4bar, 2.5bar), ±0.075% (10bar, 30bar, 100bar, 400bar)
• TD > 5: ±(0.025+0.015TD)% (0.4bar, 2.5bar), ±(0.0025+0.0145TD)% (10bar, 30bar, 100bar, 400bar)

AP Accuracy

• TD ≤ 5: ±0.2% (0.4bar, 2.5bar), ±0.1% (10bar, 100bar)
• TD > 5: ±(0.025+0.035TD)% (0.4bar, 2.5bar), ±(0.025+0.015TD)% (10bar, 100bar)

TD (Turn Down) Definition: TD = Maximum range / Current range. Maximum range (URL) is factory-calibrated; Current range (SPAN) is |URV-LRV|

Specifications

General Accuracy

• GP: ±0.075%, ±0.1%, ±0.2% URL
• AP: ±0.1%, ±0.2% URL

Range

• GP: 0.4bar to 400bar
• AP: 0.4bar to 100bar

Long-term Stability

• ±0.1% Span/5 years

Environmental Effects

• Ambient Temperature: As per specifications
• Voltage: Changes within 10.5V/16.5V to 55V DC affect zero point and range by ±0.005% SPAN/V
• Mounting Position: Less than 4mbar correction by PV=0 reset
• Vibration: <0.1% SPAN per GB/T18271.3/IEC61298-3

Output Signal

• 4mA to 20mA DC, HART

IP Rating

• IP67

Weight

• Approx. 1.56kg (without accessories)

Power Supply and Load Requirements

Voltage

• HART: 16.5V to 55V DC
• Intrinsically Safe HART: 18.5V to 28V DC

Load Resistance

• Operation: 0Ω to 2119Ω
• HART Communication: 250Ω to 600Ω

Transmission Distance

• <1000m

Power Consumption

• ≤500mW@24V DC, 20.8mA

Operating Conditions

Temperature

• Without LCD: -40℃ to 85℃
• With LCD: -20℃ to 70℃

Storage Temperature

• Without LCD: -40℃ to 100℃
• With LCD: -40℃ to 85℃

Medium Temperature

• Silicone Oil: -40℃ to 105℃
• Inert Oil: -45℃ to 160℃
• Low Temperature Silicone Oil: -55℃ to 200℃

Humidity

• 5%RH to 100%RH@40℃

Environmental and EMC Effects

EMC Performance

• Radiated Interference: Qualified (GB/T 9254.1/CISPR 32)
• Conducted Interference: Qualified (GB/T 9254.1/CISPR 32)
• Electrostatic Discharge: 8kV Contact, 8kV Air (GB/T 17626.2/IEC61000-4-2)
• Radiated RF Immunity: 10V/m (80MHz to 1GHz) (GB/T 17626.3/IEC61000-4-3)
• Power Frequency Magnetic Field: 30A/m (GB/T 17626.8/IEC61000-4-8)
• Electrical Fast Transient/Burst: 4kV (GB/T 17626.4/IEC61000-4-4)
• Surge: 1kV line-to-line, 2kV line-to-ground (GB/T 17626.5/IEC61000-4-5)
• Conducted RF Immunity: 3V (150kHz to 80MHz) (GB/T 17626.6/IEC61000-4-6)

Damping and Time Specifications

Damping Time Constant

• Electronic Components: 0s to 100s (configurable)
• Sensor Module: ≤0.2s (depends on sensor type)

Turn-on Time

• ≤6s

Factory Reset Time

• ≤31s

Hazardous Area Certifications

Certifications

• PCEC: Ex db IIC T6 Gb, Ex ia IIC T4 Ga
• NEPSI: Ex tb Ⅲ C T85℃ Db
• ATEX: Ex ia IIC T4 Ga, Ex db IIC T6 Gb, Ex tb IIIC T80℃ Db
• IECEX: Ex ia IIC T4 Ga, Ex db IIC T6 Gb, Ex tb IIIC T80℃ Db
• CSA: Class I, Division 1, Group A, B, C, and D T6, Class II, Division 1 Group E, F, and G T80ºC, Class III, Ex db IIC T6 Gb, Class I, Zone 1, AEx db IIC T6 Gb, Ex tb IIIC T80℃ Db, Zone 21, AEx tb IIIC T80℃ Db

Model and Configuration Options

Model

• MDM7000-GP: Smart Gauge Pressure Transmitter
• MDM7000-AP: Smart Absolute Pressure Transmitter

Hazardous Area Options

• Various certifications for flameproof, intrinsically safe, and dust explosion-proof applications.

Output Signal

• 4mA to 20mA DC, HART

Case Material

• Stainless steel or aluminum alloy with various outlet port specifications.

Waterproof/Explosion-proof Connectors

• Various materials and specifications with IP67 rating.

Display

• Optional LCD module (-20℃ to 70℃)

Pressure Range

• GP: From 0.4bar to 400bar
• AP: From 0.4bar to 100bar

Mounting Brackets and Accessories

• Vertical and horizontal installation options.

Calibration and Configuration Options

• Calibration reports, damping time settings, fault alarm settings, product certificates, identification plates, integrated value manifolds, leakage test reports, HART configuration, diaphragm options, fill oil types, process connections, oil-free treatment, approvals, lithium battery options, high-accuracy calibration, language options, delivery services, extended warranty.

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