Intelligent wall mounted temperature large screen display instrument

1Intelligent wall mounted temperature large screen display instrumentOverview:

This series of products adopts surface packaging modular technology, greatly improving the anti-interference ability of the instrument. It has functions such as display, control, transmission, communication, and universal signal input. It is suitable for displaying and controlling various physical quantity detection signals such as temperature, humidity, pressure, liquid level, instantaneous flow rate, and speed, and can perform high-precision linear correction on various nonlinear input signals. It can be widely used in fields such as electricity, metallurgy, chemical industry, petrochemicals, paper printing and dyeing, brewing, tobacco, aerospace bases, etc.

By adopting jumper free technology, the input port has universal signal input function. By changing the internal parameters, it is possible to easily switch between multiple input signals (various thermocouples, thermal resistors, remote pressure, mV, standard voltage/current signals). The circuit board has been continuously optimized in design and production process, reducing temperature drift and improving anti-interference performance to ensure the stability and reliability of the product during long-term operation. Adopting high brightness LED digital display and high-resolution light column display (proportional display), the display of measurement/control values is clearer and more intuitive.

All output circuits adopt optoelectronic isolation, with strong anti-interference ability. It can be equipped with a serial communication interface and can communicate bidirectionally with various devices with serial interfaces to form a network control system. It has multiple standard external dimensions and can be applied to various measurement and control scenarios. The whole machine adopts a snap in structure, which is very easy to install.

Scope of application

This series of intelligent temperature display screens is used in boiler rooms, bathhouses, hot springs, squares, banks, government agencies, etc.

Features

Universal input function

Automatic calibration and manual calibration functions

Multiple protection, isolation design, strong anti-interference ability, high reliability

A good software platform with secondary development capabilities to meet special functions

*The modular structure, combined with functional instrument chips, makes it very convenient to combine functions and upgrade the system

IIIntelligent wall mounted temperature large screen display instrumentMain technical indicators:

Basic error *: 0.2% FS, 14 bit A/D converter (large 18 bit A/D converter, indicated when ordering)

Input signal: Thermocouples: B, S, K, E, J, T, WRe, etc

·热电阻: Pt100、Cu50、Cu53、Cu100、BA1、BA2

·Current: 0-10mA, 4-20mA, etc. (input impedance ≤ 250 Ω)

·Voltage: 0-5V, 1V-5V, mV, etc. (input impedance ≥ 1M Ω)

·Remote pressure resistance: (0-400) Ω

Sampling period: 0.2S (10-200 times/second, user selectable)

Display: Single row four position LED, 3-inch digital display

Alarm output: The instrument can be equipped with multiple relay outputs, with relay contact capacity of AC220V/5A or AC220V/1A. Up to 16 relays can be equipped, and upper and lower limit control can be selected. The control set value and hysteresis value can be freely set within the full range

Transmission output: 4-20mA, 0-10/20mA (load resistance ≤ 250 Ω, indicate if the load is too large)

1-5V, 0-5V, 0-10V (load resistance ≥ 200K Ω)

Using a 12 bit digital D/A chip, isolated output

Communication output: Isolated communication interface RS485/RS232 baud rate 1200-9600bps

Feed output: DC24V/30mA, DC12V/30mA

Temperature compensation: 0-50 cold end temperature automatic compensation, error: ± 1 ℃

Power supply: Switching power supply 85-265VAC or DC24V or DC12V

Power consumption: 4W

Environmental temperature: (-20~70) ℃ (After running at room temperature for 30 minutes, it can gradually withstand the maximum temperature)

(0-50) ℃ (thermocouple signal input)

Relative humidity: ≤ 85%. No condensation. Avoid use in corrosive and flammable/explosive gases

Panel dimensions: length 3400mm, width 2200mm, depth 60mm, excluding pendants

(Our company independently develops and produces various types of instruments with complete functions. Users can choose to quickly sample at a rate of 200 times per second, high-precision 18 bit A/D acquisition, high-precision 16 bit D/A output, input signal 20 segment curve correction, full 5-digit or 6-digit display, LCD display, special input signals, multiple relay alarm buzzer outputs, high-power feeding outputs, etc. Please specify when ordering.)

3、 Terminal wiring

1. Open the back cover terminal and connect 24 terminals from left to right.

2. Power supply and communication.

3. Signal input, full signal internal parameter switching input. Factory default PT100 input.

4. Transmission output and alarm.

5. Attention: The thermal resistor PT100 must be connected in a three wire system, with terminals connected to 12, 13, and 14. Thermocouple input, terminals connected to 13 and 14.

4、 Operating instructions

（1） Key function, the product is equipped with an infrared remote control, and when setting parameters, simply aim at the screen (within 5 meters). If the infrared remote control is lost, the back cover can be opened, and there are four backup buttons designed inside.

Set value shift key, used to move the set value bit in the set state.

Switch - When setting the state, switch the prompt and switch the set value. When the instrument panel is equipped with a buzzer function, pressing this button during operation can silence the sound, and it can return to the set state.

The setting parameter setting key is used to store the new set value of the parameter and enter the next set parameter when in the setting state.

- Set value increase key, used to increase the numerical value when in the set state.

- Set value increase key, used to decrease the numerical value when in the set state.

（2） Power on self-test

Connect the wiring of the instrument according to the terminal diagram, and only turn on the power after it is correct. After the instrument self-test, if it displays -, it indicates that there is no signal received, the input signal exceeds the range, or the input signal type is set incorrectly. The instrument adopts a human-machine dialogue form to input parameters, and various prompts are used to indicate the data that should be input.

（3） Parameter setting

In working mode, the upper row displays the measured values, while the lower row displays them according to the settings. In the set state, the instrument displays a parameter prompt, press to display the set value. If the parameters remain unchanged for 15 seconds during the setting process, the instrument will automatically return to operation. After setting a parameter, press the En key to confirm and enter the next parameter setting state.

The parameter settings are as follows:

(1) Press the En key, Loc will appear on the upper display window, and oFF will be displayed on the lower display window. To modify the alarm point setting value, press the ▲ key to change oFF to on. When Loc is set to oFF, the alarm point setting value cannot be modified and can only be browsed.

(2) J1HA: J1 relay alarm point setting value (this item is turned off when J1-H is set to OFF).

(3) J1HF: J1 relay alarm reset value (this item is turned off when J1-H is set to OFF).

(4) J2HA: J2 relay alarm point setting value (this item is turned off when J2-H is set to OFF).

(5) J2HF: J2 relay alarm reset value (this item is turned off when J2-H is set to OFF).

Set the alarm parameters for J3 and J4 in sequence.

After the alarm settings are completed, a password is required to enter the secondary parameter settings.

(6) CD - Password, use the ▲ or ▼ keys to set 800 to 808, then press the En key to enter the parameter setting state. Entering other values is invalid to prevent non-technical personnel from misoperation. After setting a parameter, press the En key to proceed to the next parameter setting.

(7) Sn - Type of instrument input signal.

Note: Input signal selection comparison table (free input is automatically completed internally, no hardware adjustment is required, mA signal does not need to be connected to a resistor).

8) Dot - decimal point position, range 0-3. If dot=2, the display format is XX.XX. For temperature signals such as thermistors and thermocouples, the large setting is 1, which means the display resolution is 0.1 ℃, and the resolution is automatically converted to 1 ℃ above 1000 degrees.

(9) InPL - The display value corresponding to the lower limit of linear input, which is the lower limit of the instrument range, ranging from -1999 to 9999.

(10) InPH - The upper limit of linear input corresponds to the displayed value, which is the upper limit of the instrument range, ranging from -1999 to 9999.

(11) J1-H-J1 relay alarm mode. Set to - HH - for high measurement value alarm (upper limit alarm), set to - LL - for low measurement value alarm (lower limit alarm), and set to OFF to prohibit alarm at this point. (Alarm reference "Alarm Description") Set the alarm modes for J2, J3, and J4 in sequence.

(12) BS - Transmission output mode, which can be selected from 1-5V, 0-5V, 4-20mA, 0-10mA, and 0-20mA.

(13) The instrument measurement display value corresponding to * under the output of bS-L transmission.

(14) BS-H - The instrument measurement display value corresponding to the * on the transmission output. (See the sixth item "Transmission Output" later)

(15) OSEt - Zero point correction coefficient, displayed value after correction=measured value before correction+oSEt, factory value oSEt=0.0.

(16) FSEt - The range of the full-scale correction coefficient is 0.500 to 2.000. After correction, the displayed value is equal to FSEt × (measured value before correction+oSEt), and the factory value FSEt is 1.000.

(17) Lb - Digital filtering parameter, set within the range of 0 to 30. The larger Lb, the more stable the measurement value, but the slower the response. Generally, when the measured values are greatly disturbed, the Lb value can be gradually increased and adjusted to make the fluctuation between the measured values less than 2-5 words. When calibrating instruments in the laboratory, Lb should be set to 0 or 1 to improve response speed. Factory default 3.

(18) Addr - the communication address of the instrument, ranging from 1 to 99.

(19) BAUD - baud rate for communication, ranging from 1200 to 9600.

Parameter setting is complete, display - End, and the instrument automatically enters the running state.

5、 Alarm

This instrument can be equipped with multiple relays, each of which can be set with ultra-high, ultra-low alarm, and prohibition alarm modes, and adopts alarm hysteresis to avoid frequent relay actions. When a relay is in an alarm state, the corresponding relay's normally open contact is closed and the corresponding indicator light is on. Taking J1 alarm point alarm as an example:

If the alarm mode of this alarm point is set to upper limit alarm (i.e. J1-H is set to - HH -), when the measured value is greater than J1HA, the instrument enters the alarm state. When the measured value drops to J1HA value, the instrument does not stop alarming. Only when the measured value is lower than J1HF, the instrument will release the alarm state. When set as the upper limit alarm, the alarm value J1HA should be greater than the alarm reset value J1HF.

If the alarm mode of this alarm point is set to lower limit alarm (i.e. J1-H is set to - LL -), when the measured value is less than J1HA, the instrument enters the alarm state. When the measured value rises to J1HA, the instrument does not stop alarming. Only when the measured value is higher than J1HF, the instrument will release the alarm state. When set as the lower limit alarm, the alarm value J1HA should be less than the alarm reset value J1HF.

6、 Transmission output

The instrument can convert the measured values into standard signals, and the output form is determined by the "bS" parameter. The range of measured value transmission is determined by the "bS-L" and "bS-H" parameters. If measuring temperature signal PT100, it is required to output 4.0mA at 0 ℃ and 20.0mA at 150 ℃, then bS=4-20, bS-L=0.0, bS-H=150.0. So when the instrument displays 75.0 ℃, it outputs 12.0mA.

7、 Communication instructions

This instrument can be equipped with RS232 and RS485 interfaces for direct communication with a computer. The RS485 standard communication distance is 1.5km, and multiple instruments can be attached. The RS232 standard communication distance is 15m, and only one instrument can be attached. The TXD, RXD, and GND of the RS232 interface are respectively connected to the second, third, and fifth pins of the computer serial port. The data format consists of 1 start bit, 8 data bits, no checksum, and 1 stop bit.

This device adopts the standard Modbus RTU communication protocol and can be connected to almost all configuration software. It can connect to domestic configuration software such as Kingview, Power Control, Century Star, Fix, InTouch, etc., saving users the trouble of connecting software. When using configuration software, the device to be selected is a Modicon PLC, Modbus RTU address type, with integer 16 bit data, starting from 4001 using the Kingview register. Other configuration software may start from 3001.

Parameter code, parameter name, meaning

4x0001 PV measurement value (read-only)

4x0002 J1 J1 alarm status (readable and writable)

4x0003 J2 J2 alarm status (readable and writable)

4x0004 J3 J3 alarm status (readable and writable)

4x0005 J4 J4 alarm status (readable and writable)

Example: Read the PV (PV=1000) value of the instrument with address 1

Send data as 01 03 00 00 00 01 84 0A

The returned data is 01 03 02 03 E8 B8 FA (where 03 E8-1000), where 01 is the instrument address, 03 is the function number, 00 and 00 are the register start addresses, 00 and 01 represent reading a number, 84 and 0A are check codes, and B8 FA is the check code in the returned data. If you want to read PV and J1HA data, you can send: 01 03 00 00 02 C4 0B.

8、 Warranty

If it is a manufacturing quality problem caused by the factory, the instrument will be repaired free of charge from the date of leaving the factory. If the damage is caused by improper storage and use, the repair cost will be charged. The warranty period is twelve months, and the warranty period of 3-5 years must be specified separately.