FTR262 manual.indd
Contents
1. e Open space up to 500 m e Indoors typically 50 100 m Configuration Connector 3PIN POL programming connector Protocol Nokeval SCL protocol Configuration PC with Mekuwin for Windows 98 XP or 6970 hand held programmer Regulations EMC directive e EMC immunity EN 61326 e EMC emissions EN 61326 class B R amp TTE directive e EN 300 220 class 3 Transmitter power class 8 10 mW e EN 301 489 e EN 300 339 FTR262 User Manual 122. corresponding to Mea is scaled to be Sca1 when displayed using appropriate offset value e 2 Two point scaling Readings from Mea1 to Mea2 are scaled to be Sca1 to Sca2 on the display and other outputs Any values can be used these do not have to be the end points FTR262 User Manual Mea1 Sca1 Mea2 Sca2 Scaling points Visibility of these settings depend on the Pts setting Unscaled reading Mea is converted to Sca1 and Mea2 to Sca2 These scaling points can be conveniently used to calibrate a sensor transmitter pair in a thermal bath First set the scaling off by setting Pts 0 Apply one or two known temperatures to the sensor and write down the displayed and the real temperatures Then set Pts to 1 or 2 depending on the number of calibration points and write the first reading in Mea and the real temperature in Sca1 And the same with Mea2 and Sca2 if two points are calibrated Connections When using external power supply note that the inputs are not galvanically isolated from supply voltage Resistance input Two wire connection Connect the sensor to terminals two and three Terminal two is the measurement current source Note that terminals one and two must be connected as do terminals three and four Two wire measurement is not recommended to be used with long wires because the resistance of wires affects to the result You must enable four wire 4W measurement in settings Three wire connection Con
3. 0 700 C 0 05 rdg 0 25 C 0 02 C C 60 180 C 0 05 rdg 0 25 C 0 02 C C 200 260 C 0 05 rdg 0 25 C 0 02 C C Cold junction 0 40 C 30 60 C 0 75 C 1 5 C Thermocouple See mV 30 2000 mV 0 05 rdg 0 01 mV 50 ppm C gt 1 MO 600 mV 100 V 0 05 rdg 0 01 V 50 ppm C gt 1 MO 0 25 mA 0 008 mA 50 ppm C 50 80 O 10 Supply voltage 2 x 1 5 V alkaline AA batteries or external 8 30 VDC power supply Estimated Battery Life Time 25 C Battery Life in Years t t t t t 1 0 5 10 15 20 25 30 Transmission Interval s The use of heavy duty or long life batteries is recommended Replace both batteries at the same time and with the same type Because alkaline batteries are prone to leak over time it is recommended to change the batteries after few years FTR262 User Manual Environment Oper temperature 30 60 C Protection class IP65 Compatible radio devices Nokeval MTR RTR and FTR series radio devices Dimensions Case 80 mm x 130 mm x 60 mm WxHxD O ol 130 mm O O 80 mm 60 mm gt Antenna 178 mm 8 16 mm Radio transmitter Antenna connector 50 Q female BNC connector Standard antenna Quarter wave whip antenna BNC connector Frequency range License free 433 92 MHz subband f according to ERC REC 70 03 Coverage area
4. User manual Firmware version V2 0 8 5 2008 FTR262 Universal wireless transmitter Pt100 TC mV mA and V inputs Nokeval FTR262 User Manual DESCRIPTION FTR262 is a wireless transmitter that has universal input and can be powered using batteries or 24 VDC power supply It is housed in a field enclosure IP65 and equipped with detachable screw post connectors for inputs and power supply The wireless concept allows easy implementation installation and expansion of a measuring system even in difficult locations and installation sites The transmitter is programmable for transmission intervals from 5 seconds to 5 minutes and for the following inputs Pt100 Ni Cu universal thermocouple mV cold junction temperature ohms millivolts milliamperes and volts up to 100 VDC Measured values are transmitted using license free 433 92 MHz frequency band ISM so FTR262 can be freely used for example almost in whole Europe Manufacturer Nokeval Oy Tel 358 3 3424800 Yrittajakatu 12 Fax 358 3 3422066 FI 37100 Nokia Web www nokeval com Finland Technical support support nokeval com FTR262 User Manual SUPPLY VOLTAGE FTR262 can be powered using standard AA batteries or external 24 VDC power supply Note that the supply voltage selection jumper must be configured accordingly Installing replacing the batteries Open the case match the batteries to the and marks inside the battery holder and insert the batt
5. e input settings are in a submenu called In In submenu Sensor Input range and sensor selection e Pt Ni and Cu Resistance thermometers RTD s The nominal resistance is set in RO see below The reading is in Celsius e Ohm Resistance input The resistor is connected in two wire three wire or four wire connection The reading is in ohms e mV Voltage input 30 2000 mV e V Voltage input 600 mV 100 V e mA Current input 0 25 mA e TC Thermocouples Note FTR262 doesn t do linearization If TC is selected the result is sent in millivolts In addition the device measures and sends the cold junction temperature The result is linearized in the receiving system for example PromoLog or FTR RTR970 PRO AW e No Three wire RTD connection e Yes Two wire or Four wire RTD connection See the connections chapter for details RO The nominal resistance of a resistive temperature sensor With Pt and Ni sensors this is the resistance at 0 C e g with Pt100 set RO 100 With Cu the nominal resistance is given at 25 C If the real resistance of the sensor at the nominal temperature is known it can be fed here in order to cancel the sensor error Pts Number of scaling points The scaling means converting the reading to represent some other engineering reading The scaled value is used on the display serial output analog outputs and alarms e 0 No scaling e 1 One point offset correction The reading
6. eries Set also the supply voltage selection jumper to batteries position External power supply FTR262 can be powered connecting 8 30 V external power supply to connector B Open the case and connect the positive wire of the supply voltage to terminal 1 and the ground wire to terminal 2 Set also the supply voltage selection jumper to external power supply position iff Il ch Panasonic Supply voltage selection ILE Batteries LCI External 8 30 VDC power supply otuoseue Connector B External supply voltage FTR262 User Manual SETTINGS Use MekuWin program and programming cable or Nokeval 6790 hand held programmer to configure the device You can download MekuWin from Nokeval s web site www nokeval com for free Connection settings Communication settings for configuration e baud rate 9600 e protocol SCL e address 0 Programming connector The device has a 3PIN POL programming connector Use POL 3PIN adaptor to connect a POL RS232 cable DCS772 USB POL converter or 6790 to the device The 3PIN POL programming connector can be connected in both ways When the programming connector is connected the device sends measurement data about three times per second When the configuration connection is open no measurement data is sent Menu FTR262 menu structure FTR262 User Manual INPUTS Settings The configuration menu is divided in several submenus Th
7. maximum number of transmitters because repeaters use the same frequency channel as transmitters The following example table shows the allowed maximum number of FTR262 transmitters in a coverage area Receiver and Receiver and Transmission Receiver 1 repeater 2 repeaters a 5 22 11 7 10 43 22 14 20 87 43 29 30 130 65 43 40 174 87 58 50 217 109 72 60 261 130 87 70 304 152 101 80 348 174 116 90 391 196 130 120 522 261 174 240 1043 522 348 For example if you have transmission interval of 20 seconds and one repeater the maximum number of transmitters is 43 FTR262 User Manual The collision probability of radio data packets increases when the number of transmitters in a coverage area increases or the transmission interval decreases The following picture shows how the collision probability raises as the number of transmitters increases Collision Probabilities With Different Transmission Intervals Collision Probability 3 LRN ERROR iA Ne 2 5 R A D esete eteteete rae i REED B REN i _ 10 20 30 40 50 60 70 80 90 100 Number of Transmitters FTR262 User Manual Inputs Pt100 Range Accuracy Thermal Drift Ni100 Range Accuracy Thermal Drift Cu10 Range Accuracy Thermal Drift Thermocouples Accuracy mV Range Accuracy Thermal Drift Load V Range Accuracy Thermal Drift Load mA Range Accuracy Thermal Drift Load SPECIFICATIONS 20
8. nect the sensor to terminals two three and four Terminal two is the measurement current source Note that all conductors should be equal in length and have equal cross sectional area You must disable four wire 4W measurement in settings Four wire connection Connect the sensor to terminals one two three and four Terminal two is the measurement current source Four wire measurement is the most accurate way to measure sensor s resistance because the resistance differences in conductors have no effect FTR262 User Manual You must enable four wire 4W measurement in settings 30 2000 rriv CC o mi 0 25 mA 0 6 100 FTR262 User Manual RADIO TRANSMITTER The device sends the measurement data using license free 433 92 MHz frequency range Settings Radio transmitter configuration is done in Out submenu Out submenu Period Number of periods between consecutive transmissions The minimum value for this setting is two and maximum value is 127 One period is approximately 2 7 seconds 25 C The duration of a period depends on temperature and varies from 1 5 to 3 seconds When using batteries it is not recommended to set the period value smaller than necessary because it has a quite significant effect on battery life Maximum number of transmitters The maximum number of radio transmitters in a coverage area is limited by radio standards The use of repeaters reduces the
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