specifications features data sheet zaf-3 thermal conductivity gas analyzer thermal conductivity gas analyzer is a gas analyzer which quantitatively measures gas concentration by utilizing a causal relationship that the temperature of a heated platinum wire changes with gas concentration. the analyzer continuously measures the concentration of gases such as h 2 , he, and ar with high stability. 1. easy-to-see large lcd is helpful for efficient operation. 2. measured value is output as a linearized output signal. 3. line voltage lies within 100 v to 240 v ac, 50/60 hz. 4. external dimensions are the same as those of the pre- ceding type. 5. zero point and span can be automatically calibrated (at option). 6. other gases?interference is correctable (at option). 7. communicable with other system through an rs-232c interface (modbus tm )(at option). standard specifications measuring principle: measurement of thermal conductivity measurable component: he, ar, h 2 , ch 4 , co 2 measurable range: refer to table 1 output signal: 4 to 20 ma dc, 0 to 1 v dc, 0 to 10 mv dc isolated output (any one-output signal specifiable in code symbols) allowable load resistance: 550 ? max. (in 4 to 20 ma dc output) output resistance: 100 k ? (in 0 to 1 v dc or 0 to 10 mv dc output) display unit: lcd with backlight display of measured value: max. 4 digits display language: english output signal holding: in both manual and automatic calibrations, output value just before calibration can be held. power supply: 100 to 240 v ac, 50/60 hz power consumption: approx. 50 va warm-up time: at least 30 min ambient temperature: ? to 45?c ambient humidity: less than 90% rh (condensation unal- lowable) storage conditions: ?0 to 60?c, less than 95% rh (conden- sation unallowable) mounting: flush mounting on panel external dimensions (h x w x d): 240 x 192 x 213 mm mass: approx. 5 kg finish color: off-white (equivalent to 10y7.5/0.5) housing: steel-plate case, indoor use type material of gas-contacting parts: jis sus304, platinum, platinum iridium, silver, fluororubber, epoxy resin, nickel, tin gas inlet/outlet, purge port: rc1/4 or npt1/4 (whichever specified) external connection terminal: m3.5 screw terminal (9-pin d-sub connec- tor for rs-232c) purge gas flow rate: approx. 1 l/min (for measurement of combustible gases) ? =90 performance repeatability: 1% of f.s. linearity: 2% of f.s. drift: zero point : within 2% of full scale/week (h 2 meter, reference gas n 2 ) span : within 2% of full scale/week (h 2 meter, reference gas n 2 ) date EDS3-127C apr. 1, 2011
2 zaf-3 standard gas measurement conditions temperature: 0 to 50?c gas flow rate: constant at 0.4 0.05 l/min constant at 1 0.05 l/min(high responce) dust: less than 100 g/nm 3 with a particle size of 0.3 m max pressure: 10 kpa max mist : unallowable oxygen gas: no oxygen should be contained in mea- sured combustible gases. moisture: below saturation at 2?c corrosive gas: unallowable standard gases for calibration: zero gas : same as reference gas or as specified span gas : concentration within 90 to 100% of measuring range (positive range) concentration beyond 100% is inapplicable installation conditions the analyzer should not be exposed to direct sunlight or radiation from a hot object. ? place subjected to heavy vibrations should be avoided. a location with clean atmosphere should be selected. ? efore measuring combustible gases, the existing gases should be purged from the analyzer using air or n 2 . when the analyzer is installed outdoors, it should be shel- tered with a housing or cover to protect it from rain and wind. optional specifications relay contact output: 5 spst relay contact outputs relay contact capacity; 220 v ac/2 a (re- sistive load) isolated with relay between contacts, and between contacts and internal circuit. max. 5 points are selectable among those listed below. <1> zero-side solenoid valve drive out- put for automatic calibration <2> span-side solenoid valve drive out- put for automatic calibration response time (90% response): high speed within 10 sec (at flow rate 1l/min), allowed only for h 2 meter (ref- erence gas n 2 , without interference com- pensation) standard within 60 sec (at flow rate 0.4 l/min) other gases?interference: indication error of each measured value (vol%) interference component h 2 meter ch 4 meter ar meter co 2 meter h 2 1% +5.8 ?.5 ?.0 ch 4 1% +0.17 ?.15 1.38 so 2 1% ?.31 ?.8 +2.1 +2.5 ar 1% ?.15 ?.87 +1.2 co 2 1% ?.125 ?.725 +0.83 o 2 1% +0.019 +0.11 ?.125 ?.15 h 2 o1.5 c saturation ?.56 <3> suction pump off output in auto- matic calibration (reray ?n?immediately after turnning on power supply) <4> upper limit (1 point) concentration alarm output <5> lower limit (1 point) concentration alarm output <6> upper/lower limit (1 point) concen -tration alarm output <7> upper limit (1 point) and lower limit (1 point) concentration alarm output (total 2 points) <8> high-high limit (1 point at each step) concentration alarm output (total 2 points) <9> low-low limit (1 point at each step) concentration alarm output (total 2 points) <10> analyzer error or automatic calibra- tion error alarm output <11> calibrating status output <12> range information output (only with 2-range meter) contact input: 3 non-voltage contact inputs on; 0 v, off; 5 v dc, current at on; 5 ma isolated with photo coupler between in- puts and internal circuit. not isolated between contact inputs. the following actions can be input <1> remote holding of measured value output <2> remote range changeover (only with 2-range meter) <3> remote start of automatic calibra- tion interference gas measured value input: analog input for h 2 meter interference correction (1 to 5 v dc, 1 range) either co 2 or ch 4 component of an ex- ternal gas analyzer is to be input. adjustment is required at fuji electric? factory. details of measurement gas will be checked when receiving an order. automatic calibration function: zero and span calibrations are automati- cally carried out at the predetermined in- tervals. calibration gases are flowed sequentially by driving the externally installed solenoid valves.
3 explanation of functions output signal holding when holding is set (user setting is turned on), the latest measured value output just before output signal holding will be held during manual or automatic calibration, or by remote output holding input. in this status, indicated values will not be held. remote output holding input upon short-circuiting the remote output holding input terminal when holding is set (user setting is turned on), the latest measured value output will be held. holding continues while the contact input terminal is close-circuited. in this period, indicated values will not be held. remote range changeover input when remote range setting is selected (user setting is turned on) for two rang type, range will be changed over according to the external signal input (non-voltage contact) applied to the remote range changeover input terminal. in this mode, range cannot be changed manually. when close-circuiting the contact input terminal, the first range is selected, and the second range is selected at open circuit. range identification signal output with two rang type, the current measuring range identification is output in contact signal. the contact output terminal is closed for the first range, and open for the second range. upper/lower limit, upper limit and lower limit alarm output alarm contact output is issued with reference to the set upper/lower limit for alarm. hysteresis is settable. when measuring value exceed alarm setting value, contacts close, and open when not exceeded. spst contact automatic calibration zero and span calibrations are automatically carried out by outputting the signal for driving the externally installed solenoid valves for calibration gases at the set start time and interval or through input of the remote calibration start signal. ?calibration channel: 1 component ?calibration accuracy: 0.2% of f.s. ?zero calibration point settable range: 0 to 100% of f.s. ?span calibration point settable range: 1 to 100% of f.s. ?calibration interval settable range: 1 to 99 hours (1 hour step) or 1 to 40 days (1 day step) ?calibration gas injection time settable range: 60 to 599 sec (in sec) ?calibration start: internal timer or remote calibration start input ?solenoid valve drive signal output: spst contact (zero x 1, span x 1) ?suction pump off output in calibration: spst contact (suction pump off x 1) ?remote calibration start input: no-voltage contact input automatic calibration is started by applying a non-voltage rectangular wave to the remote calibration start input terminal (opened after close-circuiting for 1.5 sec or longer). when contacts open, automatic calibration is carried out once. ?automatic calibration error alarm output: spst contact contacts close when the quantity of zero or span calibration exceeds 50% of full scale from the level of previous calibration, and contacts open when there is no abnormalities. when automatic calibration is abnormal, measurement output depends on the previous calibration values. ?automatic calibration status output: spst contact during automatic calibration, contacts close, and open when within 50%. interference correction by interference gas measured value input correction is made using either co 2 or ch 4 component for h 2 measurement. measured h 2 gas concentration is corrected in response to a concentration change of interference gas within its concentration range measured and set in advance. external interference gas measured value input : 1 to 5 v dc, 1range interference gas fluctuation range : reference concentration 20% f.s. h 2 gas concentration correcting range : reference concentration 25% f.s. correction accuracy : 5% f.s. (note 1) enter in the sample gas component check list on the back cover. (note 2) correction accuracy value is larger when other interference gas is contained in the sample gas. analyzer error when the analyzer or automatic calibration is abnormal, contacts close, and open when normal. spst contact communicating function: rs-232c (9-pin d-sub output) half duplex, asynchronous modbus tm protocol, communication speed 9600 bps contents of communication: reading/writing of measured concentration values and vari- ous set values, and output of device status remarks: for connection in rs-485, rs-232c/rs-485 converter should be provided seperately
4 zaf-3 measuring principle fixed resistor dc amplifier s ample gas dc constant current measuring c hamber r eference c hamber this thermal conductivity gas analyzer measures gas con- centration by utilizing the different thermal conductivities of 2 gas components. in the detector, there are reference and measuring chambers in each of which a thin platinum wire is stretched. the reference chamber is filled with ref- erence gas and through the measuring chamber, sample gas is flowed. each platinum wire composes a bridge cir- cuit in combination with an external fixed resistor, and it is heated by flowing a constant current. when there is a change in the concentration of the component under measurement, the thermal conductivity of sample gas will change to af- fect the temperature of the platinum wire in the measuring chamber. the resulting thermal change is taken out as a change in electric resistance, according to which the con- centration of measured gas is calculated. thermal conductivity ratio of gases measured gas reference gas component (note 1) he ar ch 4 co 2 measurable range range ratio(note 2) 0 to 5 , 10 , 20 , 30 , 40 , 50 , 80 , 100% 100 to 90 , 100 to 80% 1 : 10 n 2, (co 2, ar) o 2, air 0 to 10 , 20 , 50 , 80 , 100% 100 to 90 , 100 to 80% 1 : 5 n 2, o 2, air , (he) h 2 0 to 3 , 5 , 10 , 20 , 50 , 80 , 100% 100 to 90 , 100 to 80% 1 : 10 n 2, (co 2, ar , he) 0 to 10 , 20 , 50 , 100% 100 to 90 , 80% 1 : 5 n 2, o 2, air , (he) 0 to 20 , 40 , 50 , 60 , 80 , 100% 100 to 80% 1 : 5 n 2, (co 2, ar , he) (note 1) contact us for the components in the parentheses. h 2 contained in o 2 cannot be measured. (note 2) range ratio stands for maximum value. gases comparative thermal conductivity (0 c) when replacing thermal conductivity of air (2.41 x 10 -2 w/(m.k) with 1 sulfur dioxide gas so 2 carbon dioxide gas co 2 argon ar carbon monoxide co steam (100 c) h 2 o air nitrogen n 2 oxygen o 2 methane ch 4 hydrogen h 2 p eltier gas cooler (note 2) (note 2) s ample g as (note 1) gas aspirator flow c hecker 0.4l/min or 1l/min (note 3) 1l/min membrane filter mist filter mist filter exhaust p urging air or nitrogen drain pot zaf (note 1) dust must be purged adequately (for protection of the pump, flowmeter, etc.). (note 2) unnecessary if sample gas is dry. (note 3) select the one with no pulsating flow within the specified flow rate range. s olenoid valve p ressure reducing valve span gas zero gas span calibration signal suction pump off signal in automatic calibration zero calibration signal example of gas measurement in industrial furnace, sintering furnace, etc. table 1: measurable component and measurable range gas sampling system diagram (example)
5 code symbols (note 1) indication in english, standard response indication in english, high-speed response 4 h 2 ar he ch 4 co 2 (reference gas ar unallowable) other 5 (note 2) n 2 air (incompatible with h 2 /ch 4 measurement) o 2 (incompatible with h 2 /ch 4 measurement) other 6 ac100 to 240v 50/60hz, rc1/4 ac100 to 240v 50/60hz, npt1/4 7 8 0 to 3% (h 2 ) 0 to 5% (h 2 ,he) 0 to 10% (h 2 , he, ar, co 2 ) 0 to 20% 0 to 30% 0 to 50% 0 to 80% 0 to 100% 100 to 90% (h 2 , he, ar) 100 to 80% (h 2 , he, ar,ch 4 ) other 9 (note 3) none 0 to 5% (h 2 , he) 0 to 10% (h 2 , he, ar) 0 to 20% (h 2 , he, ar, co 2 ) 0 to 30% 0 to 50% 0 to 80% 0 to 100% other 10 dc4 to 20 ma dc0 to 1v dc4 to 20 ma + rs-232c communication dc 0 to 1 v + rs-232c communication dc0 to 10mv 11 (note 4) provided 12 none automatic calibration automatic calibration concentration alarm concentration alarm contact output selection contact output selection 14 (note 5) none provided 13 digit description zaf 4 e h 567 3 8910 11 12 13 14 k l m e a z 4 5 6 z 0 1 3 q l m n v p t j 9 8 z y l m n v p t j z a b c d e a y a y a b c d e f (note 1) high-speed response is for h 2 meter used for reference gas n 2 only. (note 2) reference gas refers to gas other than the component to be measured in sample gas. ("z" must be specified when interference gas is to be contained.) (note 3) the ratio of maximum range to the first range is as given below. for co 2 , ar or ch 4 measurement : 1st range x 5 (times) for he or h 2 measurement : 1st range x 10 (times) a range from 0 to ...% cannot be combined with that from 100 to ...%. 1st range < 2nd range (note 4) specify y if linearization in the 12th digit is not required. (note 5) a co 2 or ch 4 meter needs to be prepared separately. a reverse range such as 100 to 0% cannot be specified. input signal is 1 to 5 v dc. adjustment is required at fuji electric s factory. details of measurement gas will be checked when receiving an order. reverse range such as 100% to 0% cannot be specified. cannot be specified if high-speed response is selected. input/output contact specifications automatic calibration zero gas valve drive span gas valve drive suction pump off in automatic calibration concentra- tion alarm upper limit (1 point) concentration alarm lower limit (1 point) concentration alarm upper/lower limit (1 point as a set) concentration alarm upper limit (1 point) and lower limit (1 point) concentration alarm 2-step upper limit (1 point each) concentration alarm 2-step lower limit (1 point each) concentration alarm other calibration status range information (2-range meter) (note 3) analyzer error or automatic calibration error (do4) (do5) (do4) (do3) (do5) remote automatic calibration start (note 4) remote range changeover (2-range meter) (note 5) remote measured value output holding (note 6) (di3) (di2) (di1) any one alarm settable on screen (do1, 2) 2 point (no) contact any one alarm settable on screen (do1, 2) 2 point (nc) contact any one alarm settable on screen 2 point (no) contact any one alarm settable on screen 2 point (nc) contact (do1) (do2) (do3) automatic calibration 14th digit : a concentration alarm 14th digit : c contact output selection (note 7) 14th digit : f 14th digit : e 14th digit : d 14th digit : b see table below. (note 1) mark : normally open (no) contact (note 2) mark : normally closed (nc) contact,after turning on power supply (note 3) low range : contacts close, high range : contacts open (note 4) when contacts open 1.5 sec after their closure, automatic calibration starts. (note 5) contacts closed : low range, contacts open : high range (note 6) contacts closed : holding, contacts open : holding canceled (note 7) up to 5 contact output points can be selected. (do1) (do2) (do3) (do4) (do5) (do4) (do5) (di3) (di2) (di1) (di3) (di2) (di1) (di3) (di2) (di1) (di3) (di2) (di1) (di3) (di2) (di1) contact output contact input
6 zaf-3 zrj gas analyzer mode zero ent esc span inlet purge 12345 11 12 13 14 15 16 17 18 19 20 1 2 3 4 5 6 7 8 9 10 outlet panel cutout 184 +2 0 232 +2 0 front view side view rear view 192 240 130 rc1/4 or npt1/4 (whichever specified) inlet rc1/4 or npt1/4 (whichever specified) outlet rc1/4 or npt1/4 (whichever specified) purging port (43) (35) external terminal (option) m3.5 screw 230 240 192 182 193 169 (24) t panel 1.6 < t < 10 external terminal (standard) m3.5 screw 140 230 (248) (268) rs-232c/dsub 9p (whichever specified) mounting brackets connection diagram l n e + measured value output (as specified) 4 to 20ma dc 0 to 1v dc 0 to 10mv dc power supply 100 to 240v ac, 50/60hz grounding terminal do1 do1 do2 do2 do3 do3 do4 do4 do5 do5 ain+ ain di1 di2 di2 di3 di3 di1 remote output holding remote range changeover remote automatic calibration start interference correcting input 1 to 5v dc contact output 2 contact output 3 contact output 4 contact output 5 contact output 1 1 2 3 4 5 111 212 313 414 515 616 717 818 919 10 20 refer to ?nput/output contact specifications?in code symbols. (standard) (option) 13th digit a and 14th digit a, b, c, d, e, f outline diagram (unit : mm)
7 scope of delivery analyzer main unit panel mounting brackets (1 set) 2 power fuses (250 v ac, 1 a) instruction manual items to be prepared separately gas sampling equipment, standard gas, receiving instrument, etc. with interference corrective calculation: ch 4 or co 2 gas analyzer ordering information 1. analyzer type 2. gas component to be measured 3. measuring range 4. gas component other than measured very important information required to achieve intended accuracy of the instrument. (enter in ?able for checiking sample gas component?n the next page.)
zaf-3
let us check your sample gas for safe use of fuji electric?gas analyzer. make entries where you can answer. if there is any question, contact our salesperson in charge of your company. the analyzer may not provide full performance depending on other gas components contained in sample gas. date item name of customer at delivery destination application, purpose gas component to be measured description your question, etc. interference gas input customer information fuji electric? salesperson in charge of your company company name section address tel person in charge measuring range co 2 meter or ch 4 meter 0- sample gas remarks component to be measured other component gas other component gas minimum concentration (%) normal concentration (%) maximum concentration (%) printed in japan caution on safety *before using this product, be sure to read its instruction manual in advance. international sales div sales group gate city ohsaki, east tower, 11-2, osaki 1-chome, shinagawa-ku, tokyo 141-0032, japan http://www.fujielectric.com phone: 81-3-5435-7280, 7281 fax: 81-3-5435-7425 http://www .fjielectric.com/products/instruments/ information in this catalog is subject to change without notice.
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