Specifications
VMT700 multi--variable pressure transmitter can be combined with throttling device, and replace different kinds of transmitters.Brief introduction:
VMT700 multi--variable pressure transmitter adopts the microprocessor technology, which can measure the differential pressure, pressure , flow rate, and temperature. As a all-digital transmitter, it provides Modbus, HART,Ethernet and other protocols for users to choose, besides, it has a built-in PID controller.
Advantages:
1. High accuracy: ±0.075% of span( ± 0.04% of span)
2. High stability: ± 0.01%/year
3. High range ratio: 100:1, 400:1 for max
4. Muti--protocol chocie: RS-232/485, HART, network interface.
5.Reliable:isolated output function, continuing self test,EEPROM write-protection function.
6.Multi-function:replace the three independent differential pressure, pressure and temperature transmitters, making less wiring in the field and more convenient for installation.
7.Built in a variety of standard throttling sets data base and arithmetic, can be combined with orifice, Annubar, and V awl throttling sets.
Technical parameters:
Physical index:
| Material of process interface | Process isolated diaphragm: 316L SS, HastelloyC-276,Monel alloy, Tantalum. Process interface: 316SS, carbon steel(zinc coating), Hastelloy and Monel alloy . O-gasket: Teflon, Fluorinated rubber Bolt: carbon steel, A286 SS (NACE) |
| The mounting bracket | Carbon steel(zinc coating), stainless steel angle bracket, carbon steel plate bracket |
| Filling liquid | Silicon oil DC 200 or CTFE |
| Shell | Epoxy polyester paint, |
| Process connection | 1/4 NPT, 1/2 NPT adapter(optional) |
| Wiring | 16AWG(diameter:1.5mm ) |
| Net weight | 6.8 Kg, 8Kg with accessories . |
| Packaging dimension | 234×185×155mm |
| Having |
Electrical parameters
Power voltage | 11.9-45 VDC | Signal output | 4-20mA DC/HART |
HART load resistance | 250-550Ω | Insulation voltage | 500 Vrms(707VDC) |
Damping time | 0.25 S | Starting time | 5 S |
Operating condition:
Parameters | Rated temperature | Operating limits | Transportation and storage |
Environment temperature(°F) | -104—185 | -104—195.8 | -131--257 |
Body temperature(°F) | -104—230 | -104—257 | -131--257 |
Humidity(%RH) | 10—85 | 0--100 | 0--100 |
Over-pressure capacity | 14MPa, 21MPa for specific | ||
Vacuum degree(kPa) | 0 | 3.5 |
|
System principle graph:
