Low Pressure (differential) Transmitter
Features
·Industrial protection grade;
·Fully stainless steel structure;
·4-20mA, RS485, 0-5V/10V output;
Introduction
The differential pressure transmitter uses full digital smart board
card, equipped with SMi full digital import chip. With high
stability, dynamic measurement performance , etc. Configure
high-performance microprocessor to correct for sensor nonlinearity
and temperature drift, Accurate digital data transfer, field device
diagnostics, remote two-way communication, etc. This transmitter
has a variety of ranges to fits the needs of various of
users.Widely used in metallurgy, machinery, petroleum, chemical,
power stations, light industry, food, environmental protection,
national defense and scientific research in various fields.
Specification
| Pressure Range | 0-100kPa |
| Accuracy | ±1%FS |
| Power Supply | 12-32VDC |
| Output Signal | 4-20mA / RS485 |
| Stability | ≤0.5%FS / Year |
| Application temp. | -20～80℃ |
Outline Construction
(Unit: mm)
The differential pressure transmitter has two air intakes, one
high-pressure air intake, marked "H" and a low-pressure air intake
marked "L". During the installation process, air leakage is not
allowed, and the presence of air leakage will reduce the accuracy
of the measurement.
Electric Connection
Cable Connection
| Wire color | 2-wire(4-20mA) | 4-wire(485) |
| Red | (+V) | (+V) |
| Yellow | (-V) | (-V) |
| Blue | Null | 485A |
| Green | Null | 485B |
Use maintenance
USE
1. The differential pressure transmitter is small size and light
weight, it can be installed directly on the measuring point when
installation, pay attention to check the sealing of the pressure
interface to prevent the measurement accuracy from being affected
by air leakage.
2. The transmitter can enter the working state by connecting the
wires as required. When measurement accuracy requirements are high,
the meter should be powered on for half an hour before entering the
working state.
Maintain
1. Normal use of the transmitter requires no maintenance
2. Transmitter calibration method: When the pressure is zero, first
adjust the zero point, then make the pressure to the full range,
verify the full scale, and repeat until the standard is reached.
3. The regular calibration of the instrument should be operated by
professionals to avoid damage.
4. The instrument should be storage at 10-30℃ and the humidity at
30-80% with a clean environment when you not use it.
