To date, a variety of equipment has firmly entered the life of man. These are the heat meters TEM-104, which are supplied by the TEM company. This company has been operating for a long time, and also distributes its equipment in all countries of the Customs Union.
Purpose and scope of equipment
The TEM-104 heat meter is a registration and measuring device that is used to account for the values of the consumed (released) amount of heat (thermal energy) for commercial or technological purposes. In addition, it can be successfully used for the formation of information systems for data collection.
With regard to the scope of the TEM-104 heat meter, it is actively used in the following areas:
- at the enterprises of the heating network;
- in the relevant paragraphs for residential, public, and industrial buildings;
- installed in central heating units ;
- well established itself during the work at the manufacturing enterprises of chemical, petrochemical, oil refining and some other branches.
Instrument composition
In order to understand the operation of the TEM-104 heat meter, it is necessary to find out what devices it consists of. It includes such devices as a safety instrument, to which PPR, DID, IP and TSP are connected. The decryption of these devices is as follows:
- IVB - block heat meter.
- PPR is a primary flow converter.
- BIT - gauge of excessive pressure.
- IP is a flow measuring transducer that generates a normalized or pulsed output signal.
- TSP is a resistance thermoconverter.
It should further be noted that the TEM-104 heat meter can include up to two PPR and IP, up to 6 TSP units, as well as up to 4 overpressure sensors.
Device design and operation
Here it is important to start with the fact that this measuring technique is multichannel and multifunctional. It is based on a microprocessor, which has a built-in alphanumeric indicator. The unit of the heat meter is necessary in order to ensure the measurement of the incoming analog signal from such elements as DID, PPR and TS. In addition, the IVB is also able to receive and process signals from IPs, which can be of a pulse-frequency nature. In addition, he not only processes them, but is able to store them, store them, and also transfer data to external connected devices.
The instruction of the heat meter "TEM-104" indicates that its primary flow converter is functioning based on the properties of electromagnetic induction. This means the following. When there is a movement of the corresponding liquid in a magnetic field between the SPR electrodes, a driving force of electromagnetic induction arises. The strength of this EMF will be fully proportional to the rate of fluid flow through the SPR.
The above leads the user to the following. In order to determine the temperature of the working fluid, the principle of voltage drop across the vehicle is used. To find out the pressure in the system, information about the incoming current strength at the BID is used - using the program it is possible to set a specific value in the range from 0 to 1.6 MPa.
All parameters that are calculated by these methods are used to calculate the thermal energy and power, the leaked mass and the volume of the coolant. All calculations are displayed on the LCD.
Device performance
The operating instructions for the TEM-104 heat meter indicate several modes of operation and a method for answering the question of whether the device is functioning stably at the moment.
In order for the user to set the current state of the equipment, the device is equipped with LEDs. If the green indicator flashes stably with a break of one second, then this indicates the normal operation of the device. If the red LED lights up with the same frequency , then this indicates the presence of an NS.
A continuous glow of the same indicator will indicate that a VT has occurred. In this case, the NS is an emergency situation, and the VT is the technical malfunction of the unit. The device has a separate yellow LED. Its glow indicates the transfer of data via the RS-485 interface.
Security measures
The operating instructions for this device have a section that is devoted to safety measures during the use and installation of the meter.
There are three main sources of threats that arise both during installation and during use.
Firstly, the mains voltage can be dangerous, which reaches 242 V. Secondly, the fluid pressure in the pipeline is 2.5 MPa, which is quite a lot. Another threat is the very high temperature of the liquid, which reaches 150 degrees Celsius.
To ensure safety during operation, it is necessary that:
- high-quality insulation of all electrical parts of this meter was ensured;
- equipped with reliable grounding for IP;
- high strength was maintained for the housing PPR, IP, as well as for the protective sleeve of the vehicle;
- there was a complete tightness of the connections PPR and IP with the pipeline.
In addition, there are several requirements that must be adhered to during the operation of the heat meter.
- Do not use the device with the cover removed.
- The dismantling of devices such as PPR or IP is prohibited until the pressure in the pipeline drops.
- Before you begin to carry out any work, you must make sure that there is no tension that is dangerous to human life.
Mounting
Installation of the TEM-104 heat meter can only be carried out by a qualified specialist. Installation is carried out in strict accordance with the instructions of the ES 99556332.002.000, as well as with the already approved installation project.
Before proceeding to direct installation, a specialist should check the integrity of the container, and then unpack. In the winter season, there is an additional condition: it is possible to open only after the meter has been kept in a heated room for 24 hours. After unpacking, it is necessary to make sure that all parts of the kit are indicated in its operational documentation. After this, the specialist has the right to proceed with the installation.
Instrument calibration
It is worth noting that the calibration of the heat meter "TEM-104" is necessary in the following cases:
- conducting the primary procedure - immediately after the release or repair work;
- Further, the operation is carried out periodically after the inter-verification period.
Testing is allowed only in state metrological services or in laboratories that are accredited by Gosstandart. It is worth adding that if the device is for repair, then a passport with all the necessary stamps is attached.