K-MVT Multivariable Transmitter Communications Interface Module Specifications
Orifice or V-Cone Measurement |
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High-Accuracy Model |
Standard-Accuracy Model |
| Reference accuracy for differential and static pressure (DP and SP) |
±0.075% of calibrated span |
±0.25% of calibrated span |
| Differential Pressure Measurement |
| Range |
0 to 400 in. H22O (0 to 10,160 mm H2O), (250 mbar) |
| Turndown ratio |
400 to 1 |
| Minimum span |
0 to 1 in. H2O |
| Zero temperature effect per 50°F (28°C) |
±0.1% of calibrated span |
±0.3% of calibrated span |
Combined zero + span temperature effect per
50°F (28°C) |
±0.225% of calibrated span |
±0.6% of calibrated span |
| Zero static pressure effect per 1,000 psi (70 bar) |
±0.24% of calibrated span |
±0.3% of calibrated span |
| Combined zero + SP effect per 1,000 psi (70 bar) |
±1.04% of calibrated span |
±1.0% of calibrated span |
| Static Pressure Measurement |
| SP available ranges |
0 to 750 psia (5.171 MPa),
absolute |
0 to 1,500 psia (10.342 MPa),
absolute |
0 to 1,500 psia (10.342 MPa),
absolute |
0 to 4,500 psig (31.026 MPa),
gauge |
| Zero temperature effect per 50°F (28°C) |
±0.1% of calibrated span |
±0.9% of calibrated span |
| Combined zero + span temperature effect
per 50°F (28°C) |
±0.225% of calibrated span |
±0.9% of calibrated span |
| Stability |
±0.016% of upper range limit
per year |
±0.1% of upper range limit
per year |
| Temperature Measurement |
| Accuracy |
±1.0°F (±2.12°C) |
| Range |
–50 to 250°F (–46 to 121°C) |
| Sensor type |
RTD, 100-ohm platinum (α = 0.00385), 4-wire;
conforms to IEC 751 Class B |
| Power Specifications |
| Voltage range |
10.0 to 18 VDC |
| Power consumption |
Less than 4 mA at 13.5 VDC |
| Physical Specifications |
| Overpressure limit |
3,000 psig (20.68 MPa)
for MVT ranges 750 and 1,500 psia
(5.171 and 10.342 MPa) |
4,500 psig (31.03 MPa)
for MVT range 4,500 psig
(31.03 MPa) |
| Process barrier diaphragm |
316L stainless steel |
| Process head material |
Zinc-plated carbon steel OR 316 stainless steel |
| Fill fluid |
Silicone oil |
| Electronic housing* |
Low copper-aluminum; meets NEMA 4 and NEMA 7 |
| Hookup and Mounting |
| Process connection |
1/4-in. NPT female or standard instrument manifold flange connection |
| Conduit |
1/2-in. female; one opening for RTD, one opening for communications |
| Mounting bracket |
Straight or angle bracket available |
| Communications |
| Interface |
RS-485, multi drop, 4-wire (2-wire data, 2-wire power) |
| Format |
9,600 baud, 8 data bits, no parity, 1 stop bit |
| Protocol |
Weatherford CIM Protocol (ASCII) |
| Addressable |
Address range 1 to 255** |
| RS-485 termination resister |
Jumper selectable |
| Environment |
| Temperature range |
–40° to +158°F (–40° to +70°C) |
| Humidity |
0 to 95% relative humidity, non condensing |
| Approvals |
| Hazardous area* |
CSA (file MC 159871), Class I Div 1, Groups B, C, and D; T5@TA=70C;
Class 2 Groups E, F, and G |
*Stand-alone version only
**1 is factory default.
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