Hobbit-T with digital indication. Gas analyzer "Hobbit-T" Stationary climatic characteristics of the stationary gas analyzer Hobbit-T

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The present market presents many different models Gas analyzes of domestic and foreign manufacturers. It is sometimes difficult to divide the scope of application of gas alarm and gas analyzers, as well as correctly evaluate the real cost of equipment.

G. azoanolizers and gas alarm systems are used to ensure safety Maintaining technological processes, prevention of explosions, fires at enterprises, protection of firefighters, rescuers, personnel and population from damage to hazardous chemicals (OCV), preventing damage to the environment.

These devices can be configured to determine a single substance or group of substances in the mixture not only with air, but also with other gases. The main difference between the gas signaling of the gas analyzer consists in the presence of the first possibility of supplying optical and acoustic signals about the concentration of gas to which the device is configured.

The Hobbit-T gas analyzer is designed to measure the contents of toxic gases, explosive gases, oxygen, carbon dioxide. Property safe Conditions Labor and use in emergency response systems (permission of the Gosgortkhnadzor of the Russian Federation No. 2rse 04-10698 for the issue and application of 17.02.2003)

Hobbit-T gas analyzer withstands overload three times higher than the upper threshold for 10 minutes, with reducing readings, after removal of overload, after 30 minutes.

The gas analyzer indication unit provides direct counts of measurement results in digital form with indication of units of measurement, chemical formula for controlled gas and channel number. Provides logging on error messages and dialog mode when calibrating and processing critical situations. In the indication block, a current output of 0-5 mA is provided (by order of the consumer 4-20 mA) with the conversion functions. There is a connection with the computer using the RS232 or RS458 serial interface. Provides separately for each measurement channel LED alarm exceeding the specified zagaznost and measurement thresholds and malfunction of the measurement channel, duplicated by the built-in audio signal. Provides control signals to the switching unit.

The switching unit in turn is intended to control by external actuating devices and provides no more than 1 A switching, at a voltage of 220 V 50 Hz. On the terminal block of switching block there are three terminals for which the "dry" contacts of the relay are derived.

The supply voltage of the gas analyzer 220 V 50 Hz. Power consumption no more than 100 W.

Device and work

The principle of operation of the gas analyzer is based on measuring the currents of electrochemical, thermocatalytic or optical sensitive elements. The current of the sensor is proportional to the partial pressure of the gas measured by it in the air.

The gas analyzer contains from 1 to 16 sensors blocks, an indication unit and a switching unit (s). The sensor blocks in the version of the configuration "Universal" admit a parallel connection to one line (per cable). In the embodiment, the "minimum" each sensor block is connected to the indication unit with a separate cable.

The sensor unit is designed to convert the partial pressure of the measured gas into the electrical signal transmitted to the indication unit. In the sensor blocks, sensors are signed with the gain and electrical signal matching schemes, and the controller with peripheral chips, which provides analog-to-digital signal conversion and communication with the display unit in the RS485 standard. Work in the RS485 standard allows parallel inclusion of up to 16 sensor blocks per line line.

The switching unit is designed to manage external actuating devices. For example, drowned motors and exhaust ventilationcompiled when the rapids set by the norms are reached. The gas analyzer is completed with the switching blocks of two types of BR 8 and BR 16 with the number of groups of switching contacts 8 and 16, respectively.

The indication unit ensures the formation of the supply voltages of the sensor blocks, the reception and processing of the sensor blocks of the sensors, display the measurement results on the display, the formation of the alert signaling signals about the achievement of the specified levels of gas supply (LED and sound alarm), current output signals, switching block control signals, computer connection , Selecting the display mode and managing the built-in gas analyzer functions using the buttons on the front panel of the indication block, ensuring the dialogue mode when calibrating the gas analyzer.

Each sensor block measurement channel has its own individual number, which is printed on a signboard attached to the sensor block. The indication of the measurement results on each channel in the indication block toughly corresponds to this number, regardless of which the connectivity with the inscription "to the sensors" it is connected.

Measurement results Requests and messages of the gas analyzer are displayed on a liquid crystal screen. With the number of channels, two or more on the display is cyclically, concentrations are inherent. Measured channels starting from the first. The manual selection of the channel viewed is provided. In this mode, the display is constantly indicated for one. Selected operator, channel.

For each measurement channel, there are LEDs for each specified threshold and the "Accident" LED. The ignition of any LED is accompanied by a beep.

My personal opinion: Hobbit-T gas analyzer has some disadvantages, firstly, the price, secondly, there is no possibility to simultaneously monitor the 2nd 3 channels, there is no possibility to disable the built-in sound alarm, are not broken down by colors and uncomfortable to observe the threshold LEDs, inconvenient in the installation , The weight of the sensor blocks and the appearance wishes improvements. But there is also a plus, in some cases, the disadvantages are the ability to take any (dry) contacts for each channel separately, i.e., if necessary, you can connect an external actuator to any triggering threshold from any channel.

Gas analyzers "Hobbit-T" are designed to measure the concentration of toxic gases: carbon oxide, hydrogen sulfide, sulfur dioxide, chlorine, hydrogen fluoride, ammonia; combustible gases: hydrogen and carbon oxide; The amounts of combustible gases with graduation according to one of the gases: methane, propane, hexane, hydrogen or carbon monoxide, as well as carbon dioxide, oxygen and alarm on the concentration output for the installed thresholds of their contents in the air working area and in gas environments for various technological processes, Including in emergency protection systems.

Description

The principle of operation is based on measuring the current arising from the interaction of gases with a sensitive element (sensor) of gas analyzers, and proportional to the content of the determined component in the air.

Gas analyzers are divided into stationary and portable, ordinary execution and explosion-proof. Stationary gas analyzers can have up to 16 measurement channels, portable gas analyzers - up to 5 channels.

Gas analyzes consist of: sensor blocks, indication block and switching unit (in fixed execution only to control external actuating devices) electrically interconnected. To measure the concentration of toxic gases and oxygen in the sensor blocks, electrochemical sensors are used; To measure the content of combustible gases and the sum of combustible gases - thermocatalytic sensors, to measure the content of carbon dioxide - optical sensors. Explosion-proof gas analyzers are equipped with "Hobbit-TV" sensors with spark-protection block.

Inpatient execution gas analyzers indication can have a digital indicator, a code output to a computer, a current output of 0 - 5 mA (4 - 20 mA) to each channel of measurement, visual and sound signaling of the threshold devices and issuing control signals to external actuators, overload signaling Sensors, visual and sound signaling of the connection of the stationary indication block with sensor blocks.

The portable gas analyzer indication unit has a digital indicator, visual and sound signaling of the threshold devices.

General form The sensor blocks are shown in Figure 1 and 2. The general view of the gas analyzes indication blocks is shown in Figures 3, 4 and 5. The general view of the switching unit is shown in Figure 6. The blocks of gas analyzes sensors are seated with a non-sticked sticker closing one of the screws on the sensor block case. The indication blocks of gas analyzes are seated with a non-standard sticker covering the interface with a side panel.

| _ "Sensors

pogo * NOW G I TAV * »

Channel 1 CO

From 20 -120 MPM 'CH. 0.22 - 2.20 s. %

Software

G azo analyzers have built-in software (BY). Identification data are shown in Table. one.

Table 1

Name software property	Identification Name of Software	Version number (identification number) Software	Digital identifier software property	Algorithm calculations digital identifier software property
	Plate 5 Canal 00
	CENTR XOBBIT NEW 12
	CENTR XOBBIT NEW 12
	CENTR XOBBIT NEW 12

Protection according to deliberate and unintentional changes corresponds to the level of "C" by Mi 3286-2010.

Specifications

Measurement ranges, limits of the allowable measurement error and the time of establishing readings are given in Table. 2.

table 2

Definite component	Range measurements	T09 readings time, with, no more	Limits of admitted basic error
			relative,%	absolute,%
	20 - 120 mg / m3
	10 - 100 mg / m3
	1.0 - 25 mg / m3
	0.5 - 3.0 mg / m3
	20 - 600 mg / m3
	0.1 - 5.0 vol.%
				± (0.05 ^ zm + 0.2)
	0.20 - 2.00 vol.%
	0.55 - 5.45 vol.%
The sum of combustible gases with graduation by:
	0.22 - 2.20 vol.%
	0.09 - 0.85 vol.%
	1.8 - 17.5 mg / l
	0.20 - 2.00 vol.%
	0.55 - 5.45 vol.%

The limits of permissible additional error, the share of the limit of the main error, not more than:

From temperature change ambient for every 10 ° C 0.5

From the mutual influence of the immeasurable components of 1.5 variation of indications, the share of the limit of the main error, not more than 0.5 time of heating, min, no more than 15 change in the output signal for 24 hours of operation of portable gas analyzers, the share of the limit of the main error, not more than 0, 5 Changing the output signal over 14 days of stationary gas analyzers, share from the limit of the main error, not more than 0.5 mass, kg, not more than 0.5

Indication block (stationary) 3.5

Indication block (portable) 0.25

Sensor block 0.7

Switching block 3.5 dimensions, mm, no more:

Display Block (Stationary) 260x240x120

Display Block (Portable) 150x80x30

Sensor block 100x80x250

Portable gas analyzers (constant) from 3.6 to 8.4

Stationary gas analyzers (variable frequency of 50 ± 1 Hz) 220 ± 22

(or constant) from 15 to 24 Maximum power consumption:

Portable gas analyzers, W, no more than 2.4

Stationary gas analyzers, in a, not more than 160

total sheets 6.

Power consumption in terms of one channel:

Portable gas analyzers, W, no more

Stationary gas analyzers, in a, no more than the average time of operation for failure, h, no less operating conditions:

Environmental temperature

For HF, ° C channels

minus 10 - 50 minus 40 - 50 minus 20 - 50 to 95

For channels for measuring the remaining gases, ° С

For the display block with LCA, ° C

Relative humidity at a temperature of 30 ° C,%

Atmospheric pressure, kPa

Type approval sign

it is applied by a typographical way to the title page of the operating manual and on the front panel of the indication block.

Completeness

1. Gas analyzer as part of:
Sensor unit *
Block indication
Switching unit **
2. Cable connecting ***
3. Charger ****
4. CD with PC communication program
5. Adapter *****
6. Operating Instructions
7. Verification technique
Notes: 1) * - the number of sensor blocks and extension cables to them are supplied in accordance with the order; 2) ** - only in stationary execution; 3) *** - cable length - according to project documentation; 4) **** - only in portable execution; 5) ***** - comes on request.

Verification

it is carried out in accordance with the procedure of calibration 436-076-2012 MP "Hobbit-T gas analyzer. The technique of calibration ", approved GTI SI FBU" Test-S.-Petersburg "03/06/2012

List of standards used during calibration:

Caliling Gas Mixtures (GSO-PGS) in Pressure Ballons, Gospectra No. number: 3722-87, 3726-87, 3728-87, 3771-87, 3772-87, 3815-87, 3827-87, 3831-87, 3843 -87, 3844-87, 3847-87, 3904-87, 3945-87, 3950-87, 3951-87, 3968-87, 3969-87, 3970-87, 4036-87, 4272-88, 5321-90 , 5322-90, 5333-90, 5903-91, 8742-2006, 9160-2008, 9170-2008; 3.

Rotameter RM-A-0.063G UZ, VPI 0.063 m3 / hour, GG ± 4%;

Stopwatch "Agat", 30 min, GHg ± 1 s;

Generator gas mixes 666 GG-03M, 0.3 - 70 mg / m3 H2S, GG ± 2%; 1.1 - 313 mg / m3 SO2, GHg ± 2%; 0.8 - 172 mg / m3 NO2, GHg ± 2%;

Chlorine generator GC-120-3, 0.5 - 30.0, 0.3 - 70 mg / m3, GHg ± 10%;

Generator PGS Infan ECHR-HF, 0.4 - 5.0 mg / m3, GHg ± 7%.

Information about measurement methods

Measurement methods are given in Section 2.4 Operation Manuals "Hobbit-T gas analyzer LhUG.413411.010 RE.

Regulatory and technical documents establishing requirements for GOBBIT-T gas analyzers

1. GOST 8.578-2008 "GSI. State calibration scheme for measuring instruments of components in gas media.

2. GOST 13320-81 "Industrial gas analyzers automatic. General specifications. "

3. TU 4215-010-46919435-99 (LhUG.413411.010) "Hobbit-T" gas analyzer. Technical conditions. "

4. Verification technique 436-076-2012 MP "Hobbit-T gas analyzers. Verification technique ", approved by the FBU" Test-S.-Petersburg "06.03.2012.

Performance of work on ensuring safe conditions and labor protection (pos. 43 of Annex 2 to the order of the Ministry of Health and Social Development of Russia No. 1034 dated 09.09.11)

Gas analyzers series Hobbit-T performed and21 Designed to control the insufficient or excess oxygen content in the air of the working area, as well as to control the hazardous gas with combustible or toxic gases.

The set of measured gases and the number of control channels is specified by the consumer when ordering. One measuring channel ensures control of one of the above gases at one point of the working area. Maximum number of channels - 16.

The gas analyzer consists of blocks of sensors (by the number of measurement channels, from 1 to 16) and the indication indication block. To manage external executive devices, the switching blocks may be included.

Hobbit-T performed and21 provides direct counting of measurement results in digital form with indication of units of measurement (mg / m 3, or mg / dm 3, or vol.%), Chemical formula for controlled gas, channel number.

Error messages are also displayed on the stationary gas analyzer display, the digital dialogue mode is indicated when calibrating and processing critical situations.

For each measurement analyzer channel, a current output (0-5 mA or 4-20 mA) is provided, it is possible to communicate with a computer using a serial interface.

Provided for each measurement channel Separate LED alarm excess of the specified threshold levels of zagaznost and duplicating it with a built-in audio signal.

In addition, the LED measurement signaling of the measurement channel failure for each measurement channel is provided, duplicated by the audio signal.

For each measurement channel, it is possible to manage external actuating devices using relay contacts (switching unit).

The principle of operation of the gas analyzer is based on measuring the currents of electrochemical (for O 2 and toxic gases), thermocatalytic (for the amount of combustible gases) or optical (for CO 2) sensitive elements. The sensor current is proportional to the partial pressure of the measured gas in the air. The type of sensor used is determined by the gas to be controlled.

The gas analyzer sensor unit is designed to convert the partial pressure of the measured gas into an electrical signal transmitted to the digital display unit. In the sensor block, the sensor is located with the amplifier diagram and the controller, providing analog-to-digital signal conversion and transmitting a sequential binary code to the communication line to the indication indication unit. The sensor unit is placed in a small-sized body with a bracket and is designed for fastening on the wall.

Gas analyzer indication unit Hobbit-T performed and21

Installation unit of the stationary gas analyzer Hobbit-T performed and21

The multichannel gas analyzer indication unit performs the following functions: the formation of the supply voltages of the sensor blocks; reception and processing of signals of sensors blocks; Display the measurement results on the display; generating warning signals about the achievement of the specified zagaznost levels (LED and sound alarm), forming current output signals; Formation of switching blocks management signals; communication with the computer to change the settings, calibration and reading information; Select the display mode and managing the built-in gas analyzer functions using the buttons on the front panel of the indication indication unit; Ensuring the dialogue in the calibration of the gas analyzer.

The display unit is placed in a metal case with two brackets for mounting to a shield or wall.

The measurement results are displayed on a liquid crystal display. With the number of channels, two or more, the measured concentration values \u200b\u200bon the display are displayed alternately cyclically, starting from the first channel. The digital display shows the channel number and chemical formula The measured gas in the top row, the measured gas concentration and unit of measurement - at the bottom line. The manual selection of the channel viewed is provided.

For signaling about reaching threshold values \u200b\u200bof the gas supply or malfunction of the measurement channels in the display unit, a sound alert device and a LED scoreboard are installed. For each measurement channel, there are LEDs for each specified threshold and the "Accident" LED. The ignition of any LED is duplicated by a beep.

In the display unit, there is a current output for each measurement channel: 0-5 mA (standard) or 4-20 mA (by request).

The switching unit of stationary gas analyzers Hobbit-T performed and21

The switching unit is designed to control external executive devices (starters of fan engines, sirens, etc.). BR-10 switching blocks can be made with a variety of relays (from 1 to 10, for of different numbers connected external devices). If you want to connect more than 10 devices, then multiple switching blocks are used. Signals that control the operation of switching blocks are fed from the indication block sequentially: from the display unit to the first switching unit, from the first switching unit to the second, etc.

The switching unit is not included in the standard package.

Constructively, the BR-10 type switching unit is performed in a unified housing for mounting on a DIN rail. In switching blocks, relays, "dry" contacts of which are removed on the terminal block on the front panel of the block. Load capacity of relay contacts: 1a, 220V.

To connect one external device on the terminal block of switching unit, there are the following terminals of the "dry" relay contacts: normally open contact; Switchable contact; Normally closed contact.

In the first switching unit there are outputs of control of two external devices, common to all channels of the gas analyzer: "Alarm" - to respond to a malfunction of a measurement channel; "Siren" - to connect an external audio device that duplicates the built-in sound source.

All other control outputs duplicate the status of the thresholds of the display block, switching when the concentration of the controlled gas of the specified thresholds is exceeded: ignition of the LED "Channel number .. Threshold number .." On the display unit is duplicated by switching the appropriate output of the switching unit - "Channel No. .. Threshold number. . ".

BR-10 switching blocks allow you to program the operation of the relay certain conditions. Programming is carried out by the manufacturer on the customer's task, or by the customer independently with the help of a special software supplied by order.

Hobbit-T gas analyzer blocks and21 are connected by four-wire cables with a cross section. copper wire not less than 0.75 mm 2. Recommended cable brands: PVS 4x0.75 or Liyy 4x0.75.