Explosion proof temperature and humidity temperature transmitter

Smart Meter

I. Overview

The integrated on-site intelligent instrument produced by our company is an ultra small, high-performance, and high-precision measuring instrument. It has the characteristics of digital display, small size, light weight, and easy installation. It converts the temperature, pressure, liquid level and other parameters of the controlled object into electrical signals. It can be directly installed in the junction box, forming an integrated structure with on-site sensing components. This not only saves compensation wires and cables, but also reduces signal transmission distortion and interference, thereby obtaining high-precision measurement results.

Usually used in conjunction with display instruments, recording instruments, electronic computers, etc. to output4-20mADC or 485 signal.

2、 Characteristics

LED display, button setting to modify range, no need to recalibrate.

Output RS485 signal or 4-20mA, high precision, maintenance free.

Save on wire and instrument installation costs.

L with three key operation is more convenient, data is processed by the microcontroller, and the stability is high.

It has the functions of anti reverse connection, anti surge, anti shock, moisture-proof, anti heat, and anti harmful gas.

L has a wide range of applications and can be used in automation industries such as chemical, metallurgical, petroleum, power, environmental protection, water treatment, pharmaceuticals, and food.

IIItechnical indicators

Power supply voltage: 24VDC ± 10%.

Customization of other power supply voltages.

Output: RS485 output or 4-20mA output.

Transmission protocol: MODBUS protocol

Range and zero position: digitally adjustable‘

Start time: within 2 seconds

Environmental temperature: 0 to 60 ℃

Display mode: LED

Environmental humidity: 5% -95%, no condensation

Vibration: ≤ 10g, f ≤ 55Hz, amplitude ≤ 0.5mm

Grounding: In areas with high electromagnetic interference, the transmitter and cable shielding layer should be well grounded

Accuracy: ± 0.2%, ± 0.5%

Linear: ± 0.2%, ± 0.5%

Electrical interface: M20 × 1.5 l

4Operation Manual(Only display this part)

long pressEnter the PASS menu with the SET (B1) key, enter the password, short press SET (B1) to save back to PASS, and enter the submenu with the correct password; Short press SET (B1) to select the menu that needs to be modified. Press B2 (←) or B3 (↑), and the modification bit will flash; Press B2 (←) to move the flashing bit, and press B3 (↑) to modify the data of the flashing bit. After the modification, press SET (B1) to confirm and save, and the cursor will stop flashing. Save successfully.

Long press in the modify menuSET (B1) exits and returns to standby mode.

INP menu (password 555)

(Table 1)

Alarm menu (password)100）

Alarm description:12 for humidity alarm, 34 for temperature alarm

upper limit alarmWhen the measured value is higher than the alarm value, an alarm is triggered. When the measured value is greater than or equal to AL X, an alarm is triggered. When the measured value is less than (AL X - HAL X), the alarm is released

Lower limit alarmWhen the measured value is lower than the alarm value, an alarm is triggered. When the measured value is less than or equal to AL X, an alarm is triggered. When the measured value is greater than (AL X+HAL X), the alarm is released

Communication menu (password)300）

5wiring method

V-Connect the working power supply of the instrument24VNegative,V+Connect the working power supply of the instrument24Vpositive

GConnect the instrument temperature output4-20mANegative,mA1Connect the instrument temperature output4-20mApositive

GConnect the instrument humidity output4-20mANegative,mA2Connect the instrument humidity output4-20mApositive

A+pick up485communicationA，B-pick up485Communication negative1,2,3,4Output for switch quantity relay

VITransmission Protocol（modbus rtu）

See attachment, communication protocol section.

Special idea:

1. Please read the instruction manual carefully before use.

2. Connect the correct power supply to prevent damage to the instrument.

3. We leave the factory according to the requirements. If you don't understand, please do not operate the instrument panel.

4. Please confirm the specially customized parameters to prevent unnecessary trouble.