Hobbit t gas analyzer. household gas analyzers, radiation meter, buy, buy radiometer, buy radiation dosimeter St. Petersburg

Encyclopedia of Plants 15.06.2019

The stationary gas analyzer HOBBIT-T consists of sensor units (their number depends on the number of control points) and an indication unit. To control external actuating devices (ID), a switching unit (s) is included in the delivery set.

Stationary gas analyzer HOBBIT-T is used for:

safe conditions

Note: the number of control points and the required set of gases measured by HOBBIT-T are set by the consumer when ordering a gas analyzer and determine the number of measurement channels. One channel of the gas analyzer provides measurement of one of the gases listed in the table Ranges of indications and measurements (table 2).

The maximum number of measurement channels for the gas analyzer HOBBIT-T is 16.
The operation of the stationary gas analyzer HOBBIT-T is based on measuring the currents of thermocatalytic (when measuring the amount of combustible gases), electrochemical or optical (when measuring the content of carbon dioxide) sensitive elements (sensors). The sensor current is proportional to the partial pressure of the gas it measures in air. The type of sensor used is determined by the gas to be monitored.

Climatic characteristics of the stationary gas analyzer HOBBIT-T

Characteristics	Values
Climatic performance	UHL2 according to GOST 15150-69
Relative humidity (upper value) at 30 °C	95%
Operating temperature range:
- for all channels except HF channels	From -40 to +50 °C
- for HF channels	From -10 to +40 °C
Atmosphere pressure	84 to 106.7 kPa
tension magnetic field, no more	40 A/m
The degree of protection by the shell according to GOST 14254-96:
- for display units	IP-50
- for sensor blocks	IP-53
Climate resistance	Groups C4 and P1 according to GOST 12997-84
Resistant to sinusoidal vibration	Group N1 according to GOST 12997-84

Ranges of indications and measurements of the gas analyzer HOBBIT-T

Defined Component	Permissible overload by concentration	Indication range	Coeff. current conversion. out. k1 / k2	Unit price of the smallest rank	measurement range	Permissible content of non-measurable components, no more
1	2	3	4	5	6	7
Carbon monoxide CO	8 1)	0 - 150 mg/m3	30 / 9,37	1mg/m3	20 - 120 mg/m3	NO - 3 mg/m3
NO2 - 3 mg/m3
NH3 - 20 mg/m3
SO2 - 100 mg/m3
Hydrogen sulfide H2S	10 1)	0 - 36.0 mg/m3	7,2 / 2,25	0.1 mg/m3	5 - 30 mg/m3	SO2 - 10 mg/m3
CO - 50 mg/m3
NO2 - 20 mg/m3
NO - 100 mg/m3
Sulfur dioxide SO2	10 1)	0 - 120 mg/m3	24 / 7,5	1mg/m3	10 - 100 mg/m3	H2S not allowed
CO - 10 mg/m3
NO2 - 20 mg/m3
NO - 40 mg/m3
Chlorine Cl2	40 1)	0 - 30 mg/m3	6 / 1,875	0.1 mg/m3	1 - 25 mg/m3	-
Fluorine F2	10 1)	0 - 0.20 mg/m3	0,04 / 0,0125	0.01 mg/m3	0.03 - 0.15 mg/m3	Cl2 - 0.5 mg/m3
Hydrogen fluoride HF	5 1)	0 - 3.5 mg/m3	0,6 / 0,1875	0.1 mg/m3	0.5 - 3.0 mg/m3	HCl - 4.5 mg/m3
Ammonia NH3	3 1)	0 - 700 mg/m3	140 / 43,75	1mg/m3	20 - 600 mg/m3	-
Ozone O3	-	0 - 600 µg/m3	120 / 37,5	10µg/m3	100 - 500 µg/m3	Cl2 - 0.5 mg/m3
CO2 carbon dioxide	-	0 - 6 vol. %	1,2 / 0,375	0.01 vol. %	0.1 - 5 vol. %	-
Oxygen O2	- 2)	0 - 36 rev. %	7,2 / 2,25	0.1 vol. %	1 - 30 rev. %	-
Sum of combustible gases, graduated to:	5 - 50% LEL or:
- methane CH4	- 3)	0 - 2.55 vol. %	0,51 / 0,159	0.01 vol. %	0.22 - 2.2 vol. %	5)
- propane C3H8	- 3)	0 - 1 vol. %	0,2 / 0,0625	0.01 vol. %	0.09 - 0.85 vol. %	5)
- hexane C6H14	- 3)	0 - 25.5 mg/dm3	5,1 / 1,59	0.1 mg/dm3	1.8 - 17.5 mg/dm3	5)
- hydrogen H2	- 3)	0 - 2.55 vol. %	0,51 / 0,059	0.01 vol. %	0.2 - 2 vol. %	4), 5)
- carbon monoxide CO	- 3)	0 - 6.5 vol. %	1,3 / 0,406	0.01 vol. %	0.55 - 5.45 vol. %	5)

Notes:
1) - permissible concentration overload is given as a multiple of the upper limit of the measurement range (VP);
2) - in the air working area the volume fraction of oxygen does not exceed the upper limit of measurements;
3) - sensors for carbon dioxide CO2 and combustible gases (CH4, C3H8, C6H14, H2) withstand concentration overload at the content of the determined component up to 100%;
4) - sensors in sensor blocks with calibration for H2 hydrogen, upon request, can be turned on in a mode that provides insensitivity to methane CH4, propane C3H8, hexane C6H14 or carbon monoxide CO;
5) - in sensor blocks with channels for measuring H2 and / or CO and / or any of the hydrocarbons (CH4, C3H8, C6H14), on request, the cross-effect of the measured gases can be taken into account.

Technical characteristics of the stationary gas analyzer HOBBIT-T

Characteristics	Values
The limit of the basic error of the gas analyzer in the measurement ranges:
- for all measurement channels (except for oxygen)	± 25%
- for oxygen measurement channels	± (0.05 C + 0.2), % vol., where C is the measured oxygen concentration, % vol.
Limit of permissible variation of the output signal of the gas analyzer in fractions of the limit of the main error	0,5
Limit of permissible change of the output signal in fractions of the limit of the main error (within 14 days of continuous operation)	0,5
Additional error does not exceed:
- from the limit of the basic error when the temperature changes for every 10 °C within the operating temperature range	0,5
- from the limit of the basic error when the content of non-measurable components is within the limits according to column 7 of table 2	1,5
The limit of allowable time for establishing indications T0.9d is equal to:
0	20 s
- Cl2 and O3 (group I-2 according to GOST 13320-81)	30 s
- HF (group I-5)	300 s
- other gases (except CO2) (group I-4)	90 s
0	Not standardized
In the display unit, the current output for each measurement channel	0 - 5 mA (optional 4-20 mA)
Conversion functions for:
- 0 - 5 mA	С = I*k1, mg/m3, μg/m3, mg/l, vol. %
- 4 - 20 mA	C = (I-4)*k2 , mg/m3, µg/m3, mg/l, vol. %
Where C is the concentration of the measured gas in units according to table 1; I - current output value, mA; k1 , k2 - specific concentration (mg/m3, µg/m3, mg/l, vol.% / 1 mA)
Communication with a computer	RS232 or RS485
There are three terminals on the terminal block of the switching unit, to which "dry" relay contacts are brought out	Normally open contact (NO)
Changeover contact (PC)
Normally closed contact (NC)
Supply voltage of gas analyzer HOBBIT-T	220V ± 10%, (50 ±1) Hz
Power consumption, no more:
- display unit with connected sensor units	60 W
- switching unit BR 16	40 W
- switching unit BR 8	20 W
The overall dimensions of the blocks of a stationary gas analyzer do not exceed:
- sensor block	75×75×350 mm
- indication block	260×240×120 mm
- switching unit BR 16	315×240×120mm
- switching unit BR 8	200×175×90mm
The weight of gas analyzer units HOBBIT-T does not exceed:
- sensor block	700 g
- indication block	3500 g
- switching unit	3500 g
MTBF of the gas analyzer (without taking into account the resource of sensors and battery)	15000 h
Average life of the gas analyzer (subject to replacement of sensors)	10 years
Calibration interval	1 year

The stationary gas analyzer withstands concentration overload for 10 minutes in accordance with column 2 of Table 2, with readings restored after the overload is removed after 30 minutes.
Display block gas analyzer HOBBIT-T provides:
- direct reading of measurement results in digital form with indication of units of measurement (see table 2), chemical formula controlled gas and channel number. The nominal price of the unit of the smallest category is given in column 5 of table 2;
- dialog mode and display of error messages during processing and calibration of critical situations;
- separate for each measurement channel LED signaling of exceeding the specified gas contamination thresholds and measurement channel malfunction, duplicated by a built-in sound signal;
- issuance of control signals to the switching unit.
The switching unit of the gas analyzer HOBBIT-T is designed to control external actuators and provides switching current of not more than 1 A, at a voltage of 220 V, 50 Hz.
Stationary gas analyzers HOBBIT-T are produced in two configuration versions:
- "Universal" - the device allows the connection of sensor blocks as a "garland" and a "star". It is completed with external blocks of load resistances, two connectors are installed on the sensor blocks (the second one is used for broadcasting the communication line);
- "Minimum" - the device allows connection of sensor blocks only with a "star". Load resistors are built into the sensor blocks. There is one connector on the sensor blocks.

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On the modern market many different models of gas analyzers of domestic and foreign manufacturers are presented. It is sometimes difficult to separate the scope of gas detectors and gas analyzers, as well as to correctly assess real value equipment.

G gas analyzers and gas detectors are used to ensure safetyreference technological processes, prevention of explosions, fires at enterprises, protection of firefighters, rescuers, personnel and the public from damage by dangerous chemicals(OHV), prevention of environmental damage.

These devices can be configured to determine one substance or group of substances in a mixture not only with air, but also with other gases. The main difference between a gas detector and a gas analyzer is that the former has the ability to supply optical and acoustic signals about the concentration of the gas to which the device is tuned.

Series gas analyzers Hobbit-T performed by I21 are designed to control insufficient or excess oxygen content in the air of the working area, as well as to control dangerous gas contamination with combustible or toxic gases.

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

The gas analyzer consists of sensor units (according to the number of measurement channels, from 1 to 16) and an indication display unit. To control external executive devices, switching units can be included in the delivery set.

Hobbit-T performed by I21 provides direct reading of measurement results in digital form with indication of measurement units (mg/m 3 , or mg/dm 3 , or vol.%), chemical formula of controlled gas, channel number.

Error messages are also displayed on the display of a stationary gas analyzer, a digital dialogue mode is displayed during calibration and handling of critical situations.

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

For each measurement channel, a separate LED signaling of exceeding the specified threshold levels of gas contamination and duplicating it with a built-in sound signal is provided.

In addition, a separate LED signaling of a measurement channel failure, duplicated by an audible signal, is provided for each measurement channel.

For each measurement channel, it is possible to control external actuators 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), thermal catalytic (for the sum of combustible gases) or optical (for CO 2) sensitive elements. The sensor current is proportional to the partial pressure of the measured gas in air. The type of sensor used is determined by the gas to be monitored.

The gas analyzer sensor unit is designed to convert the partial pressure of the measured gas into an electrical signal transmitted to the digital indication unit. The sensor unit contains a sensor with an amplifier circuit and a controller that provides analog-to-digital signal conversion and transmission of a serial binary code via a communication line to the indication display unit. The sensor unit is housed in a small housing with a bracket and is designed for wall mounting.

Gas analyzer display unit Hobbit-T performed by I21

The indication unit of the stationary gas analyzer Hobbit-T performed by I21

The display unit of a multi-channel gas analyzer performs the following functions: generation of supply voltages for sensor units; receiving and processing signals from sensor units; display of measurement results on the display; formation of warning signals about reaching the specified levels of gas contamination (LED and sound alarm), generation of signals current outputs; generation of control signals for switching units; communication with a computer to change settings, calibrate and read information; selection of the display operating mode and control of the built-in functions of the gas analyzer using the buttons on the front panel of the indication display unit; providing an interactive mode when calibrating the gas analyzer.

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

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

To signal the achievement of threshold values of gas contamination or a malfunction of the measurement channels, a device is installed in the display unit sound alert and LED board. For each measurement channel there are LEDs for each set threshold and an "Emergency" LED. The ignition of any LED is duplicated by a sound signal.

The display unit has a current output for each measurement channel: 0-5 mA (standard) or 4-20 mA (optional).

Switching unit for stationary gas analyzers Hobbit-T, I21 version

The switching unit is designed to control external actuators (fan motor starters, sirens, etc.). Switching units BR-10 can be manufactured with a different number of relays (from 1 to 10, for different number connected external devices). If you want to connect more than 10 devices, then several switching units are used. The signals that control the operation of the switching units are fed from the display unit 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 scope of delivery.

Structurally, the switching unit type BR-10 is made in a unified housing for mounting on a DIN rail. The switching units use relays, the "dry" contacts of which are brought to the terminal block on the front panel of the unit. Load capacity of relay contacts: 1A, 220V.

To connect one external device, the terminal block of the switching unit has the following terminals of “dry” relay contacts: normally open contact; switchable contact; normally closed contact.

The first switching unit contains control outputs for two external devices common to all channels of the gas analyzer: "TROUBLE" - to respond to a malfunction of any measurement channel; "SIRENA" - for connecting an external sound device duplicating the built-in sound source.

All other control outputs duplicate the state of the threshold devices of the indication unit, switching when the concentration of the controlled gas exceeds the specified thresholds: the lighting of the LED "CHANNEL No.. THRESHOLD No. .." on the indication unit is duplicated by switching the corresponding output of the switching unit - "CHANNEL No.. THRESHOLD .".

Switching units BR-10 allow you to program the operation of the relay according to certain conditions. Programming is carried out by the manufacturer on the instructions of the customer, or by the customer independently using special software supplied on request.

Blocks of the Hobbit-T gas analyzer performed by I21 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.

The gas analyzer HOBBIT-T is designed to measure the content of toxic gases, explosive gases, oxygen, carbon dioxide. Ensuring safe working conditions and use in emergency protection systems

The gas analyzer HOBBIT-T withstands an overload three times the upper threshold for 10 minutes, with the restoration of readings after removing the overload, after 30 minutes.

The display unit of the gas analyzer provides a direct reading of the measurement results in digital form with indication of the units of measurement, the chemical formula of the controlled gas and the channel number. Provides an output to the display of error messages and a dialogue mode at calibration and handling of critical situations. In the display unit, each measurement channel has a 0-5 mA current output (4-20 mA on customer's request) with conversion functions. Communication with a computer is provided using a serial RS232 or RS458 interface. Provides separate for each measurement channel LED signaling of exceeding the specified gas contamination thresholds and measurement channel failure, duplicated by a built-in sound signal. Provides control signals to the switching unit.

The switching unit, in turn, is designed to control external actuators and provides switching current of not more than 1 A, at a voltage of 220 V 50 Hz. There are three terminals on the terminal block of the switching unit, to which "dry" relay contacts are brought out.

The supply voltage of the gas analyzer is 220 V 50 Hz. Power consumption is not more than 100 watts.

DEVICE AND OPERATION

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

The gas analyzer contains from 1 to 16 sensor units, an indication unit and a switching unit(s). Sensor blocks in the "universal" configuration variant allow parallel connection per line (per cable). In the “minimum” configuration option, each sensor unit is connected to the display unit with a separate cable.

The sensor unit is designed to convert the partial pressure of the measured gas into an electrical signal transmitted to the indication unit. The sensor blocks contain sensors with circuits for amplifying and matching the electrical signal, and a controller with peripheral microcircuits that provides analog-to-digital signal conversion and communication with the display unit in the RS485 standard. Operation in the RS485 standard allows parallel connection of up to 16 sensor units per communication line.

The switching unit is designed to control external actuators. For example, starters of supply and exhaust ventilation, switched on when the gas content thresholds established by the standards are reached. The gas analyzer is equipped with two types of switching units BR 8 and BR 16 with 8 and 16 switching contact groups, respectively.

The display unit provides the formation of the supply voltage of the sensor blocks, the reception and processing of signals from the sensor blocks, the display of measurement results on the display, the generation of personnel warning signals about reaching the specified levels of gas contamination (LED and sound alarms), current output signals, switching block control signals, communication with a computer , selection of the display mode and control of the built-in functions of the gas analyzer using the buttons on the front panel of the display unit, providing an interactive mode when calibrating the gas analyzer.

Each measurement channel of the sensor block has its own individual number, which is printed on the nameplate attached to the sensor block. The indication of the measurement results for each channel in the indication block strictly corresponds to this number, regardless of which connector with the inscription “to sensors” it is connected to.

Measurement results, requests and messages of the gas analyzer are displayed on the LCD screen. When the number of channels is two or more, the concentrations are displayed cyclically in turn. measured by channels starting from the first. The mode of manual selection of the viewed channel is provided. In this mode, the display constantly shows readings for one. channel selected by the operator.

For each measurement channel there are LEDs for each set threshold and an alarm LED. The ignition of any LED is accompanied by a sound signal.

My personal opinion: the gas analyzer HOBBIT-T has some drawbacks, firstly, the price, secondly, there is no possibility to simultaneously monitor at least 2 3 channels, there is no way to turn off the built-in sound alarm, they are not divided by colors and it is inconvenient to observe the threshold LEDs, inconvenient to install , the weight of the sensor blocks is large and appearance wants improvements. But there is a plus, in some cases outweighing the disadvantages, this is the ability to take any (dry) contacts for each channel separately, i.e., if necessary, you can connect an external actuator to any threshold from any channel.

The principle of operation of the gas analyzer is based on measuring the currents of electrochemical, thermocatalytic (when measuring the amount of combustible gases) or optical (when measuring the content of carbon dioxide or methane) sensitive elements (sensors). The sensor current is proportional to the partial pressure of the gas it measures in air. The type of sensor used is determined by the gas to be monitored. The signals of sensitive elements (sensors) located in the sensor unit are fed to the inputs of amplifiers that convert, amplify and match with an analog-to-digital converter.

After turning on the power, the gas analyzer starts to work in the mode of continuous measurement of the controlled gas. The measurement results of the first channel are displayed immediately after the power is turned on. When the set threshold level of gas contamination for toxic gas is exceeded or when the oxygen content exceeds the set threshold levels, regardless of the currently viewed channel, an audible and LED alarm is activated. The gas analyzer has a battery discharge control circuit, which signals a decrease in the supply voltage below an acceptable level. When the battery voltage drops below the acceptable level, the display shows the message “Ac. discharged."

Specific configuration gas analyzer HOBBIT-T determined by the consumer and displayed in the passport (Appendix A): the number of measurement channels (one channel - one analyzed gas), the list of analyzed gases, measurement ranges, set thresholds and other parameters.

Portable multicomponent gas analyzers HOBBIT-T (transl.) with a remote sensor are divided into two main modifications:
- general industrial version with a remote sensor unit on a cable of six or more meters;
- with a remote block of sensors "Hobbit-TV" in explosion-proof design on a cable of six or more meters.

Distinctive features of the Hobbit-T gas analyzer:

small weight and dimensions;
built-in light and sound alarm;
performance at negative temperatures(up to -40°С);
battery discharge control is provided;
electronic zero setting.

Technical characteristics of the portable gas analyzer (alarm device) Hobbit-T:

Characteristics of Hobbit-T	Values
The limit of the basic error of the Hobbit-T gas analyzer (except for O2 measurement channels)	±25%
Limit of basic absolute error of O2 measurement channels	±(0.05 C + 0.2),% vol. where C is the measured oxygen concentration, % vol.
Gas analyzer warm-up time, no more than, min.:	15
Number of measurement channels (sensors): Hobbit-T non-explosion-proof Hobbit-T explosion-proof
Time to establish indications at the level of 0.9, no more than, s.: oxygen and combustible gases, Hydrogen fluoride, Other gases except carbon dioxide
Gas analyzer indication	digital, light, sound
Operating time of the Hobbit-T gas analyzer without recharging the battery	8 h
Relative error of the gas analyzer	25,00%
Power consumption of the Hobbit-T gas analyzer	0.8 VA
Gas analyzer supply voltage	4.8 V (from built-in batteries - 4 NiMH 4 * 1.2 V cells) the battery is located in the sensor unit
Explosion protection marking (for Hobbit-T explosion-proof)	ExibIIBT6
Degree of dust and moisture protection: Display block Sensor block
Mass of the Hobbit-T kit, kg: Display block, Sensor block non-explosion proof
Gas analyzer dimensions, mm: Indication block Hobbit-T non-explosion-proof Sensor block non-explosion-proof Indication block Hobbit-T explosion-proof Explosion Proof Sensor Block Power supply (charger)
MTBF	15,000 hours (excluding sensor and battery life)
Hobbit-T gas analyzer warranty period, months	12
Calibration interval of gas analyzer Hobbit-T, months	12
Operating conditions of the Hobbit-T gas analyzer
Temperature environment	from -40°С to +50°С
Relative humidity	up to 95% at 30°С
Atmosphere pressure	84 to 106.7 kPa

Metrological characteristics of gas analyzer Hobbit-T

Gas	Hobbit-T gas analyzer reading range	Measurement range of gas analyzer Hobbit-T	Alarm thresholds per channel (default)
Gas	Hobbit-T gas analyzer reading range	Measurement range of gas analyzer Hobbit-T	threshold1	threshold2	threshold3
Oxygen (O2)	0 - 36 vol.%	0 - 30 vol.%	down	–	–
Methane (CH4)	0 - 2.55 vol.%	0.22 - 2.20 vol%			–
Propane (C3H8)	0 - 1.0 vol.%	0.09 - 0.85 vol%			–
Hexane (C6H14)	0 - 25.5 mg/l	1.8 - 17.5 mg/l			–
carbon monoxide (CO combustible)	0 - 6.5 vol.%	0.55 - 5.45 vol%			–
carbon monoxide (CO)	0 - 150 mg/m3	20 - 120 mg/m3	20 mg/m3	100 mg/m3	–
hydrogen sulfide (H2S)	0 - 36 mg/m3	5 - 30 mg/m3	10 mg/m3	–	–
sulphur dioxide (SO2)	0 - 120 mg/m3	10 - 100 mg/m3	10 mg/m3	–	–
Chlorine (Cl2)	0 - 30 mg/m3	1 - 25 mg/m3	1 mg/m3	20 mg/m3	–
Ammonia (NH3)	0 - 700 mg/m3	20 - 600 mg/m3	20 mg/m3	60 mg/m3	500 mg/m3
Hydrogen fluoride (HF)	0 - 3.5 mg/m3	0.5 - 3.0 mg/m3	0.5 mg/m3	2.5 mg/m3	–
Carbon dioxide (CO2)	0 - 6.00 vol%	0.1 - 5.0 vol.%	0.5 vol%	–	–
Hydrogen (H2)	0 - 2.55 vol.%	0.2 - 2.0 vol.%			–