2088 type pressure transmitterDetailed product description：

Measurement principle of 2088 pressure transmitter

The 2088 series pressure transmitter uses imported or domestically produced pressure resistance/diffusion silicon pressure chips, which have high sensitivity, high accuracy, and strong overload resistance. Sensitive components are formed by diffusion or ion implantation processes to form resistors and connected into a Wheatstone bridge, and pressure sensitive membranes are formed under the bridge using micro machining techniques. When pressure is applied to the diaphragm, due to the piezoresistive effect, the resistance value changes and a linearized output signal proportional to the applied pressure is generated. We add a DC power supply to the Wheatstone bridge, which produces an output of a DC voltage signal. Through a secondary conversion circuit, achieve a two-wire 4-20mA output or 0-10mA, 0-20mA, 0-5V, 1-5V output.

Characteristics of 2088 pressure transmitter

·The assembly of imported or domestically produced piezoresistive/diffusion silicon cores reflects the first-class pressure transmitter technology level and high performance reliability.
·Compact structure, sturdy, lightweight, easy to install, convenient to use, and maintenance free.
·Zero point and range can be continuously adjusted externally, with a wide range of migration.
·Suitable for all-weather harsh environments and various corrosive media.
·Can be configured with a linear 100% pointer meter or a 3 1/2LCD or LED digital display meter.
·Explosion proof type: intrinsically safe type meets the requirements of GB3836 · 4-83;
Explosion proof type: Explosion proof type meets the requirements of GB3836 · 2-83.

The product complies with the requirements of GB3836.1-2000 "Explosion proof Electrical Equipment for Explosive Gas Environments Part 1: General Requirements" and GB3836.4-2000 "Explosion proof Electrical Equipment for Explosive Gas Environments Part 4: Intrinsic Safety Type" I "
After being matched with a safety energy limiter (such as KAS903H type), it can be used for gas or liquid pressure measurement in explosive gas environments containing Class A, B, and C T1~T5 groups.

Basic technical specifications of 2088 pressure transmitter:

• Standard range: -0.1 Mpa,16kPa ， 35 k Pa ， 0.1MPa ， 0.2MPa ， 0.7MPa ， 1.7MPa ， 3.5MPa ， 7MPa ， 35MPa ，60MPa And other specific ranges.
The explosion-proof mark is Ex ia Ⅱ CT5, and the associated equipment number is KAS903H
Maximum overload: twice the standard range.
• Pressure forms: gauge pressure, absolute pressure
Accuracy level: 0.2% F.S, 0.5% F.S
Power supply: The working voltage of the transmitter is U=12VD. C~24VD. C. When matched with a safety energy limiter (such as KAS9002i+type), the working voltage is U=15VDC~36VD. C. It is recommended to use 24VD. C.
Measurement medium: non corrosive gases, liquids. The transmitter diaphragm cannot be impacted by solid particles.
Long term stability: ± 0.2% F.S/year
Compensation temperature: 0~70 ℃; Working temperature: -10~85 ℃
• Temperature performance:

	minimum	typical value	maximum
Zero temperature drift	-0.75%F.S	0.2%F.S	+0.75%F.S
Sensitivity temperature drift	-0.75%F.S	-0.2%F.S	+0.75%F.S

(1) Including hysteresis, repeatability, and nonlinearity.
(2) 0~70 ℃, relative to 25 ℃. (No further explanation, all test values are relative to 25 ℃)
(3) The performance has decreased beyond the compensation temperature range.
(4) Output format: 4-20mA two-wire system. Or 0-10mA, 0-20mA, 0-5V, 1-5V output.
(5) Maximum load of two-wire system line: R Lmax=(V SS -8V)/20mA-R; Suggest using 250 Ω or 500 Ω.
R Lmax: Maximum load resistance (K Ω) V SS: Power supply voltage (V) R: Wire resistance (K Ω)

Basic external dimensions

Standard pressure interface: M20x1.5, G1/2, G1/4, 1/2NPT and other standards
• Total length: approximately 135mm
• Electrical interface: Hummel lead out


【 Electrical Connection Method 】

The wire connection method of the pressure transmitter can be found in the product manual
1. Connect the cable through the crimping nut and the three pin terminal block
Connect terminal 1 to the positive end of the power supply, and connect terminal 2 to the negative end of the power supply.
2. Tighten the crimping nut to secure the cable.
3. The safety zone is connected to the explosive environment through a safety energy limiter. Please refer to the instructions for using the safety energy limiter for the connection method.
4. The distributed capacitance and distributed inductance of the connecting cable between the safety barrier and the transmitter shall not exceed 0.04uF and 2mH.

[Debugging Method]

The zero offset and full-scale calibration of the transmitter are adjusted by the potentiometer screw on the circuit board inside the transmitter. Unscrew the protective cover and you can see the potentiometer adjustment. Loosen the screws on the plug, or unscrew the plug plug screw and remove the wiring terminal to adjust the potentiometer.

Adjustment steps:
Adjust the zero potentiometer to output 4mA without applying pressure to the transmitter.
Pressurize the transmitter to full range, adjust the sensitivity potentiometer to output 20mA.
After adjustment, tighten the protective cover. Or install the wiring terminal, tighten the plug screw, and tighten the screw on the plug.

【 Precautions 】

1. Pay attention to reliable circuit connections and correct wiring methods during use.
2. Do not directly squeeze the transmitter diaphragm with hard objects to avoid damaging the transmitter.
3. During the transportation, installation, and use of the transmitter, it should not be dropped or placed randomly to avoid damage.
4. The overload pressure of the transmitter should not exceed 200%.
5. The product has a warranty period of more than one year and a verification period of one year. It is covered by warranty and replacement for damages not caused by improper use by the user.
6. During transportation, the transmitter should be packed in a dedicated packaging box and appropriate measures should be taken to avoid damage caused by rain, snow, strong vibration, and impact.
7. The transmitter should be stored in a well ventilated, acid free, alkali free, and non corrosive gas free warehouse with an ambient temperature of -40~85 ℃ and a relative humidity of less than 95% RH.