Notes on 7KQ3105-..

Support bracket

For easy mounting, incl. support for 8 gas connections consisting of:

• Mounting part: Dimensions 380 x 110 mm (W x H)
• Bracket for gas connection: Dimensions 146 x 110 mm (D x H), bracket on right side, mounted at right angle

Sample flow switchover

The chromatograph enables automatic selection and switchover of 3 sample flows and 1 calibration flow. The DO signal from the gas chromatograph requires an external relay for the solenoid valve. The sample preparation system can be ordered separately.

Ambient temperatures

Particularly in warmer zones, weather protection is necessary to protect the SITRANS CV against direct solar radiation. The chromatograph is designed as standard for temperatures from -20 to +55 °C. A version in a thermostatically-controlled casing is also available as an option for temperatures outside these limits.

Communication

SITRANS CV has a serial interface (RS 485/RS 232) for MODBUS communication (RTU/ASCII). Modbus mapping can be flexibly used (see manual for more information).

The operator input is by means of another separate interface via Ethernet (TCP/IP).

Other serial and analog (4 to 20 mA) interfaces are optionally possible using an external solution package (see Article No. 7KQ2160).

Documentation

The documentation includes a SITRANS CV Manual and CVControl Operating Manual in English and German. The documents can be found on the enclosed CD. Safety manuals in all EU languages are also available on the CD.

CVControl operating software

The operating software (language: English or Russian) is included in the scope of supply. Windows XP or Windows 7 must be installed on the computer in order to install this software.

Application

A general system check is made of the basic unit and the integrated application module. The module and basic unit are described in the manual. In addition to the standard configuration, additional country-specific and user-specific sub-configurations are available. The performance record ex works contains the analysis check, including a repeatability record (4h test).

The chromatograph is preconfigured; In addition, three CD-ROMS are enclosed:

• SITRANS CV Software (including manuals and CVControl Operating Instructions)
• Country-specific sub-setups
• Parameter backup

Article numbers Pos. 8_0: Applications – Standard calorific value analysis

This application comprises the standard calorific value analysis. The chromatograph's measurement method is set at the factory, using a synthetic natural gas mixture. The performance parameters specified in Table 5 and the criteria explained in the subsequent text apply to the individual components in Table 1 and their physical variables.

The calculation of the calorimetric variables is possible according to the following standards: ISO 6976-95, GOST, AGA 8, where the former is preset. The reference states for the combustion and for the gas volume that must be specified for calculation purposes are preset to the standard state (T_b=25 °C, T_n = 0 °C) and can be easily changed to other reference states during commissioning using the operating software (T_b= operating temperature, T_n= standard temperature).

The CVControl software provides the energy units BTU/ft³, KWh/m³ and MJ/m³.

Article numbers Pos. 8_1: Applications – extended calorific value analysis with oxygen

This position includes the extended calorific value analysis of the components and possible working ranges from Table 1. Oxygen is measured in addition to the listed components (see Table 2).

A carrier gas dry filter (article no. filter set A5E00400116) on the mounting bracket of the SITRANS CV or enclosed separately is used as standard for this measurement.

The remarks concerning oxygen and CO in footnote 1 of Table 1 are no longer applicable to this position. The information concerning calculation and performance parameters are identical to Pos. 8_0.

Important:

For correct operation of SITRANS CV in accordance with Pos. 8_0 and 8_1, all measured components must be present in the calibration gas. The calibration gases listed in the table "Recommended calibration gases for Pos. 8_0 and 8_1" are recommended (also see Table 6):

Table 7: Recommended calibration gases for Pos. 8_0 and 8_1

A summary of the various country-specific setups, i.e. standard settings including measured components and calibration gases, can be found on the parameter backup CD in the "Readme.pdf" document.

Article numbers Pos. 8_2: Applications – Calorific analysis with biomethane

This position contains the analysis of the components and working ranges of the biomethane listed in Table 3. Based on the measured concentrations of the components, the quality parameters – such as heating values – are determined in accordance with the international standards ISO, GOST and AGA analogously to positions 8_0 and 8_1.

Article No. Position 8_3: Applications – Calorific value analysis with backflush summation

This position includes the analysis of the components listed in Table 4, in which case the components starting from C6, including the isomers, are regarded as the sum peak. This variant is especially well suited for natural gases with very low content of higher hydrocarbons, especially C6+.

However, this backflush summation can also be used to effectively analyze natural gas with typical C6+ fractions. The components up to and including C6+ can be analyzed within the possible concentration ranges according to Table 4.

A01 – SITRANS CV for calorific value analysis Position 8_0, 8_1, 8_2 and 8_3 - Russian configuration

This position includes the possibility for ordering SITRANS CV with a Russian Ex certificate.

IMPORTANT: This Russian version results in a change in the nomenclature from SITRANS CV to MicroSAM.

The following also applies to Pos. 8_3: The limits listed in GOST Standard 31371.7-2008 are checked during the inspection and supplied with the device documentation.

B02- SITRANS CV with extended measuring range in combination with Pos. 8_0

This position permits separate measurement of the group isomers of the higher hydrocarbons C6 to C7(+) and C6 to C9 (+). In accordance with the designation C7(+) and C9 (+), a detailed measurement is carried out up to and including n-C9.

Important:

Testing and certification of the SITRANS CV is carried out using the standard calorific value analysis in accordance with Pos. 8_0. If Pos. D02 or D03 has been selected, this does not include repetition of the proof of repeatability (4 h test) of the unit during the factory acceptance.

The following calibration gases are essential for operation of the SITRANS CV including these extended measuring ranges:

Table 8: Components and concentrations of the calibration gases for the extended measuring ranges

More detailed information regarding startup of SITRANS CV including C7(+) and C9(+) measurement can be found in the manual and on the enclosed document CD (country-specific setup "Readme.pdf" file)

D01 - Acceptance and customer information - Factory acceptance, visual check, 1 day

The scope of supply is checked and the documentation and operation of the unit explained as part of the factory acceptance process. The factory acceptance does not include repetition of the proof of repeatability (4 h test) of the unit.

D02 - Acceptance and customer information - Factory acceptance with performance record, 1 day

The scope of the tests to be carried out is described in Table 9 "Scope of tests during factory acceptance". When ordering D02, please supplement the desired option from E0x.

Table 9: Scope of test during factory acceptance

SITRANS CV is a standard product. Only in this manner is it possible to guarantee short delivery times and attractive prices. All performance records required retrospectively require higher overhead. However, will will be happy to come to an agreement regarding implementation.

D03 - Acceptance and customer information - Factory acceptance, each additional day

Only in conjunction with D01 or D02

E0x - Repeatability test

Proof of repeatability over a period of 4 h is included as standard. Longer repeatability records for the unit can be ordered by means of the supplementary item E0x.

E01 to E03 - Repeatability test, 8 h – 24 h – 48 h

Only in conjunction with D02

Linearity tests can be carried out in the factory on request. The standard test gases required for this (Table 10: "Recommended calibration gases for linearity test during acceptance") are provided free of charge. If the customer specifies other calibration gases with different compositions or higher uncertainty requirements, they must provide these gases for acceptance purposes. As an option, Siemens can procure these special calibration gases (subject to a charge).

On request, proof of the complete functionality of the SITRANS CV is possible within the certified temperature and ambient conditions.

Table 10: Recommended calibration gases for linearity test during acceptance

The calibration gases have the following uncertainties:

Table 11: Uncertainties of calibration gases

Notes on 7KQ2160-..

Analog and serial data transmission

SITRANS CV does not provide internal analog outputs. These properties can be provided by the SIMATIC Extension Unit. This uses the Modbus output of the chromatograph in order to generate up to 8 active analog outputs (standard, more analog outputs on request).

Modbus multiplexers are available in addition, and allow up to 2 Modbus masters to be connected to the SITRANS CV. The distance from the SITRANS CV should not be more than 1 200 m. In the case of an installation without enclosure (without explosion protection), we deliver the components for generation of analog outputs mounted on a rail, otherwise in the Ex d enclosure.

Pos. 08_ 0 - 5 – Analog values via external unit

This position includes:

• Mounting rail
• Power supply
• SIMATIC S 7-300 and SIMATIC S7, Micro Memory Card 3.3 V NFLASH, 64 KB
• Analog output module with terminating connector
• Protocol converter

Pos. 09_ A – C: Modbus multiplexer

(only applicable together with 0-4)

The Modbus signal can be routed using the Modbus multiplexer and connected to two Modbus masters. B specifies supply of the components without CE certificate.

Pos. 10_ A - B: Enclosure

This position includes the option for installation of the SIMATIC extension unit in the hazardous area (Zone 1 and Zone 2). A protective casing Ex d with standard cable glands including the modules required for the analog outputs and the Modbus multiplexer (if applicable) are provided for this purpose.