MT-Single channel

MT-Single channel

Intelligent Displacement Digital Display Instrument
Functional Features:
■ Automatic calibration and manual calibration functions.
■ Multiple protection, isolation design, strong anti-interference ability, high reliability, and stable acquisition.
■ Good software platform with secondary development capabilities to meet special functions. Advanced modular structure.
■ Powerful instrument chip. Function combination and system upgrade are very convenient.

一.Product Overview:

This series of products adopt surface-mounted modular technology, which greatly improves the anti-interference ability of the instrument. It has functions such as display, control, transmission, communication, and multi-signal input. It is suitable for the display and control of various physical quantity detection signals such as displacement and speed. It can be widely used in fields such as electric power, metallurgy, chemical industry, petrochemical industry, papermaking and printing, brewing, tobacco, and aerospace bases. The output circuits all adopt photoelectric isolation, with strong anti-interference ability. It can have a serial communication interface and can perform two-way communication with various devices with serial interfaces to form a network control system. It has a variety of standard external dimensions and can be applied to various measurement and control occasions. The whole machine adopts a snap-in structure, and the installation is very simple.

.Main Technical Indicators

basic error

0.1% FS, 14-bit A/D converter (maximum 18-bit A/D converter, please specify when placing an order).

Input Signal


· Resistance potentiometer signal: 0~10mA, 4~20mA, etc. (Input impedance ≤ 250Ω)

· Voltage: 0~5V, 1~5V, mV, 0~10V, etc. (Input impedance ≥ 1MΩ)

· Remote pressure resistance: (0~400)Ω

Sampling Period

0.2S (10 to 200 times per second, optional for users)

Display

Dual-row four-digit LED digital tube display. Single-row four-digit LED digital display.

Alarm Output

The instrument can be equipped with multiple relay outputs. The contact capacity of the relays is AC220V/5A or AC220V/1A. It can carry up to 16 relays at most. Users can choose upper limit and lower limit control. The control set value and hysteresis value can be freely set within the full range.

Transmission Output

4~20mA, 0~10/20mA (Load resistance ≤ 250Ω. Please indicate if the load is too large)

1~5V, 0~5V, 0~10V (Load resistance ≥ 200KΩ). 

It adopts a 12-bit digital D/A chip and has an isolated output.

Communication Output

Isolated communication interface: RS485/RS232, baud rate: 1200~9600bps

Print Output

RS232 interface, TTL interface

Feed output

DC24V/30mA、DC12V/30mA

Temperature Compensation

Automatic cold junction temperature compensation for 0~50℃, with an error of ±1℃.

Power Supply

Switching power supply: 85~265VAC or DC24V or DC12V

Power Consumption

4W

Ambient Temperature

(-20~70)℃ (After the device is turned on and runs for 30 minutes at room temperature, it can gradually withstand the extreme temperature.) (0~50)℃ (Thermocouple signal input)

Panel Size

96mm×48mm (standard configuration), 160mm×80mm, 96mm×96mm, 72mm×72mm, 48mm×48mm (subject to the specific optional functions)

.Terminal wiring instructions

⑴ A、A/D Specification for instrument with size 160×80×125. A/S specification for instrument with size 80×160×125.

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⑵B Specification 96×96 size instrument                                                                                                 (3) C Instrument with specification 96×48 size.


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4)Specification 72×72 size instrument

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Notice:

For instruments with special requirements, please follow the actual wiring diagram of the shipped instrument for the wiring method. When the relay of the instrument controls inductive loads such as AC contactors and solenoid valves, it is easy to generate electric sparks, which will interfere with the instrument. Parallel connection of RC at the control end of the relay can effectively reduce interference and prolong the service life of the relay. The parallel resistance is 100 ohms with 0.5 watts, and the capacitor is 1000V/0.033u. Moreover, the power supply of the contactor cannot be drawn from the instrument power terminal (points A and B), and as far as possible, it should not be on the same line as the instrument power supply to avoid interference with the instrument when the contactor operates.

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四、Installation size

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五、alarm

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

If the alarm mode of this alarm point is set to upper limit alarm (that is, 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 the value of J1HA, the instrument does not stop alarming. Only when the measured value is lower than J1HF, the instrument is released from the alarm state. When set to 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 (that is, 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 the value of J1HA, the instrument does not stop alarming. Only when the measured value is higher than J1HF, the instrument will解除 the alarm state. When set to lower limit alarm, the alarm value J1HA should be less than the alarm reset value J1HF.

六、6LED alarm

This instrument can be equipped with multiple relays. Each relay can be set to ultra-high, ultra-low alarm, and alarm prohibition modes. Moreover, an alarm hysteresis method is adopted to avoid frequent relay operations. When a certain relay is in an alarm state, the corresponding normally open contact of the relay closes, and the corresponding indicator light is on. Taking the alarm of J1 alarm point as an example:

If the alarm mode of this alarm point is set to upper limit alarm (that is, J1-H is set to 1), when the measured value is greater than J1HA, the instrument enters the alarm state. When the measured value drops to the value of J1HA, the instrument stops alarming.

If the alarm mode of this alarm point is set to lower limit alarm (that is, J1-H is set to 2), when the measured value is less than J1HA, the instrument enters the alarm state. When the measured value rises to the value of J1HA, the instrument stops alarming.

七、Transmitting output

The instrument can transmit the measured value as a standard signal. The output form is determined by the parameter "bS". The transmission range of the measured value is determined by the parameters "bS-L" and "bS-H". For example, if measuring the displacement signal and requiring an output of 4.0 mA when the value is 0 and 20.0 mA when the value is 150.0, then bS = 4 - 20, bS-L = 0.0, and bS-H = 150.0. When the instrument displays 75.0, the output is 12.0 mA.

八、quality guarantee

In case of quality problems caused by the manufacturer, the manufacturer will repair it free of charge from the date of instrument delivery. If the damage is caused by improper storage and use, cost will be charged for repair. The warranty period is twelve months. If the quality guarantee period is 2-3 years, it must be specified separately.

九、Common fault handling

Fault phenomenon

fault cause

processing method

Instrument is not lit up when powered on.

Power cord is not connected properly or there is a fault in the instrument.

Check whether the power cord is loose or misconnected. Check whether the power supply voltage is within the normal range. Contact the manufacturer or dealer.

Instrument display----

Sensor failure

Check whether the sensor has open circuit, open resistance or disconnection.

Wrong selection of indexing number.

Select the scale number that matches the input signal.

Signal line connection error

Connect the signal line correctly. For thermal resistors, please connect them according to the three-wire system.

Incorrect measurement value

Wrong selection of indexing number.

Select the scale number that matches the input signal.

Signal line connection error

Correctly connect the signal line.

Relay malfunctions.

Wrong alarm output mode.

Select the required alarm mode according to the instruction manual.

No transmitter output

Wrong transmission output mode

Select the required transmission output mode or instrument terminal according to the instruction manual.

Output wiring error

Please connect the wires correctly.

Communication abnormality

Communication address is set incorrectly.

Communication address baud rate error. Communication port wiring error.

Reset the correct communication address.

Reset the correct communication baud rate.

Check the wiring and connect it correctly. The computer serial port is broken.


十、Ordering instructions

1、 Appearance instrument size, opening size, insertion depth

2、 Input signal type and display form

3、 Output type and output method

4、 Communication selection

5、 Feed current magnitude and voltage, power supply for the sensor

6、 Instrument power supply

7、 Can be specially customized according to customer requirements.

Shenzhen Juzhun Sensor Technology Co. , Ltd. All rights reserved | 粤ICP备2024266441号粤ICP备2024266441号-1