HTPN9050 - Farnell
Contents
1. 25 5 8 Printing algorithm giving a reasonably fast resullt 27 59 APPENDIX 7 PAPER 29 5 10 APPENDIX connections a u 30 HTPN9050 User s Manual Page 2 31 Reference FDE 3105721 Axiohm List of figures ho k u u u PROPER DE piki 6 ili T UM 14 lO 15 16 lo 17 Li 1 18 19 o 19 u cinta enm MIRO EMINUS 22 Thermistor s resistance Temperature nnne nene 24 Pin muniers 0 Jl 31 List of tables Summary of printer SC ENTORNO 4 Nominal E 7 CONSUMED MONO fi i 7 SEPN MOr uu u uu oS bio es EL eds PDA vM 7 Motor BCG i AE i r TRE TEE 11 Ge2. 10KQ ATKQ BC807 output port PRINTER Vo 178Q If OPTO SENSOR Condition Pulse wave from output port with low level during 0 6 ms measuring Vo 0 2 ms after pulse falling edge Same conditions for output signal Vo as in 2 2 5 1 HTPN9050 User s Manual Page 9 31 Reference FDE 3105721 A Axiohm 2 2 6 Printhead specifications Driver chips 6 Operating range Vcc LSI supply 4 75 5 25 Mean dot resistance 10 120 Nominal dot supply voltage 10 40 5 Nominal Heating current per dot 42 Filter any transient signal and parasitic on this line Separate Vcc from Vch because Vch can go lower than 4 75 Volts Vcc must be connected to the same power supply than the other electronic circuits which drive the printer Note that three rank of head resistance are defined depending on the head resistance This rank is indicated on the head either on a sticker or directly written on the head It allows to adjust heating time if very precise driving is required Ranks are depicted in the table here after 127 to 132 115 to 126 Q 108 to 114 Q HTPN9050 User s Manual Page 10 31 Reference FDE 3105721 A Axiohm 3 1 Paper feed 3 OPERATION Table 5 Motor feed timing diagram b LI La JT P2 AT Motor Steps td 1f 1f 1f Heating cycles Note that each time the motor has been stoppe
3. 100 mm Connector 6 pins top entry type J S T ref B6B PH K S Pinout pin 1 2 first winding pin 3 4 second winding pin 5 Door switch pin 6 Ground HTPN9050 User s Manual Page 7 31 Reference FDE 3105721 Axiohm 2 2 3 Microswitch specifications Contact resistance lt 1Q Maximum rating 30 V DC 2 2 3 1 Connection Leads length 120 mm Connector Together with motor Door Switch open Switch closed 2 2 4 Opto sensor specifications Absolute Maximum ratings IF mA VR Pb mW VCEO V IC mA Pc mW 5 75 30 20 75 50 VF V IR uA ICEO A VcCE saD v tr us IF 4mA VR 5V VCEO 10V VCE 5V IC 0 1 mA IF 4mA RL 1 Maxi 1 2 10 Maxi 110 7 Typical 100 Typical 30 2 2 4 1 Connection Integrated with the printhead connection See appendices HTPN9050 User s Manual Page 8 31 Reference FDE 3105721 Axiohm 2 2 5 Recommended use Opto sensor The user should be aware that opto sensors characteristics have very wide tolerances We thus recommend the use of one of the schematics below 2 2 5 1 Opto Sensor Sample minimal external circuit VCC 5V 4 PRINTER OPTO SENSOR A Vo For If 220 mA Output signal is LOW when paper is PRESENT lt 1 uen Output signal is HIGH when paper is EXHAUSTED Vo 4V 2 2 5 2 Sample external circuit with low consumption VCC 5V VCC 5V
4. Axiohm HTPN9050 USER MANUAL Reference FDE 3105721 A November 99 AXIOHM 1 9 Rue d Arcueil BP 675 92542 Montrouge Cedex France Tel 33 0 1 47 46 78 00 Fax 33 0 1 46 55 13 44 1 31 Axiohm Table of Contents le GENERAL 5 SPECIFICA EM EM EM EM E 5 Z4 Mechanical 5 2 1 1 Dimensions of the Complete mechanism aaa 6 2 132 6 225 MC kasi 7 op 7 2 2 OE PMN re uonseasueaead 7 uyu u 8 2 2 4 Opto Sensor specifica grs 8 2 2 3 Recommended 9 3JPiithedad Speo ted 10 3 OPERATION 11 n 1 3 1 1 Motor initialisation RU DANI 1 SN Po i Q 11 3 1 3 Closing door and motor feed 11 4 RECOMMENDATIONS 12 Al Mechanical
5. IE u uu 12 4 2 Energising and de energising printer 12 43 Paper drive recommendations L u us Usa 12 44 Constraints to consider for maintaining printhead life expectancy 12 4 5 Specific Recommendation for Version with Latceh 12 5 APPENDICES EN KA 13 APPENDIX Sci M 14 5 2 APPENDIX 2 64 BIT LSI DRIVERS CHART AND OPERATION 18 5 3 APPENDIX 3 Electrical specifications of 64 bits LSI driver 20 5 4 APPENDIX 4 64 Bits ESI driver timing Cla eee eio e u L uu u 21 5 4 1 TYPICAL LOADING 21 5 5 APPENDIX 5 Thernustor sk ul i iii Oe E UTE e PNG 23 56 GENERAL CHARACTERISTICS 23 5 7 APPENDIX 6 Heatine time for HT S
6. Tear Strength ISO 1974 Image Colour Moisture stability ISO 287 HTPN9050 User s Manual Page 29 31 Reference FDE 3105721 Axiohm 5 10 APPENDIX 8 Printer connections Table 10 Pinout of the printer flex cable x 2 v Gp GD for ver x 5 Gp GD vm 36 v Contact side HTPN9050 User s Manual Page 30 31 Reference FDE 3105721 Axiohm Figure 12 Pin numbers of flex cable Table 11 Recommended connectors for the flex cable 1 5597 39 51 3264 5597 30 51 7263 2 Stocko MZF 9386 6 0 2626 MZE 8896 6 0 2626 The Connector requested 26 pins step of 1 25 mm Zero insertion force Note that using any other connector can destroy the flex cable HTPN9050 User s Manual Page 31 31 Reference FDE 3105721
7. and cover in good mechanical conditions HTPN9050 User s Manual Page 11 31 Reference FDE 3105721 Axiohm 4 RECOMMENDATIONS 4 1 Mechanical stress Never apply mechanical stress to the printer because this could cause misalignment and degrade print quality 4 2 Energising and de energising printer Warning When energising the thermal printhead Vcc 5 V it is important to apply all the logic signals within 4 ms particularly to de energise all the OEs If the line of dots Vch 5 V is supplied before the control logic resistor dots may be destroyed Because the control logic has random state resistors might be heated for a longer period than the specified maximum burning out the heated resistor To avoid this we recommend applying the heating voltage Vch after the logic supply voltage Vcc The same precaution should be taken at shut down The heating supply Vch must be switched off before the logic supply Vcc Care should be taken to allow enough time for residual capacitive charge to dissipate 4 3 Paper drive recommendations Use a paper reference 2320061 in AXIOHM classification or references specified in this manual Any other paper can induce problems such as poor print quality unevenly spaced sublines reduced head life expectancy chemical incompatibilities with bucket roller or head Use a paper roll of a maximum diameter of 50 mm A paper jam could occur otherwise Do not run t
8. the following conditions Logic voltage on chip 4 75V lt Vdd lt 5 25V care should be taken to filter any transient signal or parasitic in order to keep the driver in a known state failure to observe this may result in head destruction Clock frequency 5 MHz Table 7 Logic current 5 V P CONDITIONS VALUES SYMBOL Vdd supply current 64 drivers on 30 mA Min high level input voltage 5 Volts 3 5 0 7xVdd low level input voltage 5 Volts 1 5 V 0 3xVdd Max high level input current 0 5 uA Max low level input current 0 5 Min high level output voltage Io Iohmax 4 45 V Max low level output voltage Io Iolmax 0 05 V Table 8 Heating Current CONDITIONS VALUES SYMBOL Max power output current Vdon Vdonmax Idomax Max output leakage current Vdon 5V Idoleak Max output voltage Idout Idomax Vdonmax HTPN9050 User s Manual Page 20 31 Reference FDE 3105721 A Axiohm 5 4 APPENDIX 4 64 Bits LSI driver timing chart 5 4 1 TYPICAL LOADING SEQUENCE Table 9 LSI driver symbols serialclock period 5 2 clock pulsewidth 70 fns 3 clock set uptime 40 ns datainfromclockholdtime 40 f ns 5 jsrobehightim 100 f ns t6 clock to strobe delay time 100 ns 7 serial data from clock delay 120 ns t8 OEtodataoutdelaytime 45 9 data o
9. PPS 3 Per AXIOHM conditions which are mainly 5 V room temperature 25 C 480 pps dot printing duty cycle 30 HTPN9050 User s Manual Page 4 31 Reference FDE 3105721 Axiohm 1 GENERAL Based on static thermal printing technology the HTP printers are very easy to use high reliability devices which are designed to be integrated into a large range of hand held terminals This manual also described the version HTPN9150 HTPN9450 and HTPN9550 Those references are versions with translucent cover or and latched cover 2 SPECIFICATIONS 2 1 Mechanical specifications Figure 1 General view of printer Tear off bar Printhead spring k Se HTPN9050 User s Manual Page 5 31 Reference FDE 3105721 Figure 2 Cut through view of printer Lip KS gt Flex cable Out of paper opto sensor 2 1 1 Dimensions of the complete mechanism see appendices for drawings Height 55 mm Depth 76 mm Width 92 8 mm Weight 150 g 2 1 2 Chassis mounting see appendices for drawings The user should be aware of not stressing the printer mechanism Otherwise print quality can be degraded producing defects such as light printing or non homogeneity of the print The only screws proposed for mounting are M2 5 or M2 6 only They should not enter the nuts further than 4 mm in which case nuts could be damaged and turn freely inside bucket The maximum torque applicable to the scr
10. a single packet of dots Send the second N 3 dots on preceded by dots off for positioning to the printer and apply timings from heating a single packet of dots Feed in the paper for one subline 2 motor steps Printing will be done with the motor stopped and return to the calling routine HTPN9050 User s Manual Page 28 31 Reference FDE 3105721 Axiohm 5 9 APPENDIX 7 PAPER SPECIFICATIONS The two recommended and tested references for paper are JUJO AF KS50E3 TF 50KS used to generate the heating time table shown in this manual Property Method Grammage SCAN P6 58 5 2 Thickness SCAN P7 622 Surface smoothness 500 50 Brightness SCAN P3 85 min ISO 2470 Static initial activation OD 0 2 70 temperature Static activation OD 1 78 temperature Tensile strength SCAN P16 Tear Strength SCAN P11 Image Colour Moisture stability SCAN P4 Property Heat resistance 60 C 24 hrs 0 25 max 1 25 min Humidity resistance 40 C 90 RH 0 15 max 24 hrs 1 25 min Dynamic Sensitivity 0 49 mj dot 0 95 0 05 Maximum Density SCAN P11 1 35 0 05 Warranty Image amp 25 C 65 RH dark 3 years Printability place KP440 Grammage ISO 536 58 5 Thickness ISO 534 60 5 Surface smoothness ISO 5627 250 min Brightness ISO 2470 75 min Tensile strength ISO 1924 3 3 min Static initial activation OD 0 2 50 temperature Static activation OD 1 98 temperature
11. ar size IEC 12 05 silver palladium metallic coating 5 6 GENERAL CHARACTERISTICS Climatic category IEC 40 85 56 Maximum operating temperatures 20 C to 80 C Rated resistance at 25 C Rn 100 KQ see table of values Tolerance for Rn 5 Maximum dissipation at 25 0 24 mW Thermal dissipation factor 5 mW C Thermistor time constant dot line t 30 sec Resistance value as a function of temperature see curves Note that printing should be stopped if the thermistor value goes over 60 C HTPN9050 User s Manual Page 23 31 Reference FDE 3105721 A Figure 11 Thermistor s resistance R Temperature variations 100KOhms nA Ll D RET 10000 1000 R kOhms 90 100 110 120 130 ali r 30 40 50 BD 0 10 20 30 20 10 4 25 A Reference FDE 3105721 Page 24 31 HTPNO9050 User s Manual Axiohm 5 7 APPENDIX 6 Heating time for HTPN9050 The heating time table is presented on next pages it was achieved with the JUJO TFS50KS paper The motor cycle time for one dot line is given in the second top line of the table it is the time for two motor steps The column 3 indicated with speed 2 mm s and motor cycle time 62 5 ms gives the required heating time giving the necessary energy to obtain an optical density of 1 2 Three are
12. as are then defined in the table Area 1 white the motor cycle time for one dot line is greater than the heating time indicated in column 3 Area 2 high lighted the maximum heating time is greater than the motor cycle time Area 3 indicated by the required heating time function of speed voltage and temperature becomes greater than the motor cycle time printer cannot be operated How to use tables heating time can be controlled either with or without historical control Without historical control apply the indicated heating time given as a function of speed voltage and temperature At high speed printing quality for isolated dots might be affected with this method Example at 25 mm s 25 C and 5 volts 3 85 ms With historical control in area 1 apply the indicated heating time function of speed voltage and temperature when the dot has been heated on the previous subline and the time from column 3 when it has not This method gives the best printing quality Example at 25 mm s 30 C and 6 volts previous dot dot to heat Heatng time to apply dot ON 8 2 39 ms dot OFF 4 28 ms With historical control in area 2 apply the indicated heating time function of speed voltage and temperature when the dot has been heated on the previous subline and the motor cycle time when it has not At high speed printing quality for isolated dots might be slightly affec
13. d for more than 8 ms the next step should be longer by 1 ms in order to restart the motor in the appropriate position Heating of subline should be started after a time td gt 0 5ms in order to reduce risks of unevenly spaced sublines when overheating the paper Td can be reduced to O if the heating time is well adapted to the paper used 3 1 1 Motor initialisation This operation is necessary to place the motor in a good position when the printer electronic is powered on or reseted Both phases must be powered with the same current during t121 ms It must be followed by 16 motor steps in order to compensate the play in the gears 3 1 2 Printing mode There are 4 different positions for the motor phases If 2 The circulation is gt gt AB The position of the phases must be kept in memory while the phase currents are switched to zero order to restart the motor in a good position Ip 250 mA t2 gt 2 2 ms After the motor has been switch off before feeding the paper for further printing the phases must be repowered at their position before switch off during 5 ms Otherwise unevenly spaced lines may be printed During printing the motor phases should be maintained otherwise a paper motion can occur and induce unevenly spaced sublines 3 1 3 Closing door and motor feed When the door is closed you should feed 1 to 2 cm of paper at high speed in order to reposition the platen roller
14. erence FDE 3105721 A Page 16 31 HTPNO9050 User s Manual Axiohm Figure 6 Bottom view Uu CI 7 0 2 when printhead spring is fitted 71 5 0 1 without D 35 75 38 S y p L n 5 aS D E fi fat 45 0 2 Cl E Cr T n on i ES I I i 32 5 0 1 Suet 304 U The 3 inserts are designed to assemble the printer to the user set They can accept M2 5 and M2 6 screws The screws should not be screwed longer than 4 mm inside bucket The maximum acceptable torque is 0 2 Nm The maximum pulling effort is 50 N by insert Screwing outside of these maximum values may destroy the bucket HTPN9050 User s Manual Page 17 31 Reference FDE 3105721 A Axiohm 5 2 APPENDIX 2 64 BIT LSI DRIVERS CHART AND OPERATION The LSI power and multiplexing circuit drivers located on the thermal printhead provide power control from logic signals and the DC power supply voltage These circuits are supplied by 5 V 5 logic voltage Take care to filter transient and parasitic on all logic lines Undetermined states can happen and destroy the head The power source should be disconnected from the logic source The logic source must be connected to the same source as the electronic circuits in charge of controlling the printer Eac
15. ews is 0 2 Nm Disrespecting this could result in loose inserts inside the bucket destructive situation The printers mechanism 1s not designed to hold anything more than itself and the paper within No extra mass or weight should be attached through the assembly screws It is not recommended to have any other part within close proxiity to the gears or print head HTPN9050 User s Manual Page 6 31 Reference FDE 3105721 A Axiohm 2 2 Electrical Specifications 2 2 1 Power supply Table 2 Nominal power supply Printer HTPN90500 Printhead Logic Vcc V DC Dot line 5 Stepping Motor 5 Table 3 Nominal consumption of printer Printhead Heating current dot Vch 42 Logic current dot Vcc maxi 0 5 Stepping motor 2 activated phases 500 at nominal voltage 2 2 2 Stepping motor Table 4 Stepping motor specifications Recommended control voltage Coil Resistance 20 7 Number of phases 2 bipolar Pitch angle 7 5 1 non cumulative error Number of steps per revolution 48 Paper feed for 2 motor steps 0 125 Recommended control current 250 Maximum starting frequency at 5V 620 Maximum speed at 5V 680 higher voltage or current allows to go a bit faster higher speed indicated in the heating time table Note if higher current is applied a special care must be taken to avoid overheating of the motor 2 2 2 1 Motor connection length of the leads
16. ft The latch should not be released from the side dl b 4 5 L 4 The latch must be released from the front HTPN9050 User s Manual Page 12 31 Reference FDE 3105721 5 APPENDICES HTPN9050 User s Manual Page 13 31 Reference FDE 3105721 A Axiohm 5 1 APPENDIX 1 Drawings of Printer Figure 3 Right view Ae vi n co GS LX T P _ h e eae c S oS 4019 2 xg D 55 C HTPN9050 User s Manual Page 14 31 Reference FDE 3105721 A Figure 4 Front view 5 qc 9 Wy oc SY a a 0 S 5 D _ D D zn OF The optional leg is designed to assemble the printer to a PCB It should not incur stress and 1s not sufficient to support the printer mechanism Use the lower inserts for assembling the mechanism to the full product set HTPN9050 User s Manual Page 15 31 Reference FDE 3105721 Figure 5 Top view Passibilites de tourner le moteur de 190 au montage To mouni The molor with g roiafion 1 7 I S m ox BS Trous de fixation Mounting holes OL if ot0 Ref
17. h circuit features 64 open collector transistors a 64 bit shift register and a 64 bit memory register Each circuit controls 64 resistor dots on the printhead Figure 7 Driver chart Vch amp 1 2 3 Z xum OUTPUTS 62 63 64 Line of resistor dots GND Output Enable OE OW Strobe 64 bits buffer Op register Serial gt bits shift Input SI register Cl SV SERIAL OUTPUT SO HTPN9050 User s Manual Page 18 31 Reference FDE 3105721 Axiohm Figure Routing data to the resistor dots Note See Appendix Connection for the available signals on the printer connection RI R64 RI Resistors Resistors CHIP n CHIP n 1 SI SO SI SO IN j j OUT IVY A CLK Strobe OE n OE n 1 Figure 9 Dots print order Printhead __ gy substrate paper path direction see on next page for description of dots position x Sensitive layer Printhead bottom view chip side Thermal paper The first bit of data entered will be the first bit of data printed FIFO HTPN9050 User s Manual Page 19 31 Reference FDE 3105721 Axiohm 5 3 APPENDIX 3 Electrical specifications of 64 bits LSI driver Table 6 General electrical description of drivers Max voltage at outputs 1 to 64 7 Volt Max voltage any other pin 5 25 Volt Max output current 45 mA Total max output current 2 88 64x 45 10 A The specifications given below are given for
18. he printer without paper this would damage the printer Ensure that adequate air circulation around the printhead support heatsink 15 provided Poor ventilation of the printhead support heatsink can degrade the print quality There is possibility when there is no latch after loading paper or after puling the paper in a wrong direction to cut it that the cover switch stays open because the cover is not well closed In this case the end of paper optical sensor will detect paper try once to achieve 16 motor steps and check again the cover switch if it stays open then stop printing 4 4 Constraints to consider for maintaining printhead life expectancy Do not print if thermistor is over 60 C If this happens head may be destroyed Respect other voltages and timings limits specified in this document Logic voltage on chip care should be taken to filter any transient signal or parasitic in order to keep the driver in a known state failure to observe this may result in head destruction Separate the Vch and Vcc signals in order to stay in the defined limits of voltage on Vcc Vcc must be connected to the same power supply than the other electronic circuits which drive the printer 4 5 Specific Recommendation for Version with Latch i Enough Space must be left in front of latch on the host system so that the user can release the latch with his finger versions HTPN9450 and HTPN9550 See drawing le
19. ine print it with the motor stopped use precomputed heating time tables with the Vch measures and Thermistor measure as index to heating time value Drive the motor phases through a specific interruption and timer in order to warrant independence with all other tasks Printing a subline Count the number N of dots on to be printed on the subline Yes If N gt 128 then otherwise send all of them to the printer see appendix Call the algorithm for a multiple Start the motors phases They should be heatings on one subline monitored in parallel with the heating of the Apply the timings from Heating a packet of dots Wait for the end of the motor phases HTPN9050 User s Manual Page 27 31 Reference FDE 3105721 Axiohm This algorithm is to be used if more than 128 dots are on for a subline This limitation is induced by high currents values required to print more than 128 dots The approach is to split the subline into packets of dots that will be printed successively Printing a multiple heatings on one subline Yes printing will be done in 2 packets of equal number of dots on 129 255 No printing will be done in 3 packets of equal number of dots on Send the first N 3 dots on to the printer and apply timings from heating a single packet of dots Send the first N 2 dots on to the printer and apply timing from heating
20. neral electrical description of drivers 20 ol i Sie Sy ON OS 21 PIMOUt or Cie printer 20 Recommended connectors 31 HTPN9050 User s Manual Page 3 31 Reference FDE 3105721 Axiohm WARNING This manual contains the basic operations to run your printer Read it carefully before using your printer paying full attention to the chapter recommendations Table 1 Summary of printer specifications Printing method Static thermal dot line printing Resolution 8 Dosmm Paper width 60 mm 0 1 detection By Thermistor Paper feed pitch 0125 20 mm Operating voltage range Vcc logic 4 75 5 25 V DC Vch dot V DC Current Consumption 42 x1 mA per resistor dot on at 5V Vch 55 mA per resistor dot on at 6 5 V Current Consumption Stepping motor 250 mA per activated phase at 5V 325 mA per activated phase at 6 5 V Current Consumption Vcc mA per 64 resistor dot on at 5V TRES Dimensions Width 92 8 Depth Height 150 Recommended paper 2320061 in Axiohm references or other Axiohm approved papers ex Jujo AF KS50 E3 amp TF KS 50E3 For a printhead with a resistance of 120 2 In standard conditions 5 Volts 30 C for a printhead with a resistance of 120 at 480
21. ted with this method Example at 35 mm s 10 C and 6 5 volts previous dot dot to heat Heating time to apply dot ON EH E dot OFF m HTPN9050 User s Manual Page 25 31 Reference FDE 3105721 Axiohm etes asm ease ume Eire 0 i506 e avons 10 873 887 avons 20 6 7247 822 7 avons 30 6 208 796 7 7 avons aoc 876 701 888 7 avots 50 843 606 504 an a4sVots 1534 a 4sVols 10 1034 748 8 B 7 45 Volts 20 935 671 858 7 a5Volts 30 amp 35 5 499 488 45Vols 40 C 735 528 439 41 887 7 0 885 636 528 494 SVots 10 807 58 483 45 Volts 20 729 524 45 407 384 7 SVolts 25C 69 496 412 385 363 346 30 50 HTPN9050 User s Manual Page 26 31 Reference FDE 3105721 A Axiohm 5 8 Printing algorithm giving a reasonably fast result Some simple rules should be applied always print less than 128 dots at once on a given subline print only packets of the same number of dots on if more than 128 dots are on on a given subl
22. ut fall time 10 90 15 45 ps t10 data outrise time 10 gt 90 15 45 ps Vdd 5V Temp 25 C with resistive load RI 120Q connected to 5V HTPN9050 User s Manual Page 21 31 Reference FDE 3105721 Clock Serial in Serial out Strobe OEn Data Out n Serial in Clock Serial out STROBE OE Data Out n Note HTPN9050 User s Manual Page 22 31 Reference FDE 3105721 A Figure 10 LSI driver timing chart Tclk t6 t5 t10 90 90 10 10 Serial input for data to be printed Serial parallel shift register clock activated on leading edge of pulse rest level logic 0 Clock frequency is 5 MHz The rising time of clock must be lt 50 ns Serial data out sent back to the connector of the thermal head Signal for putting data into memory active on logic level 1 rest level logic 0 Output Enable OE1 to OE3 power activation signals active at logic level 1 Internal data out to heating points not available on connector All these inputs are CMOS compatible Axiohm 5 5 APPENDIX 5 Thermistor specifications This thermistor has a resistance variation can be expressed as follows Equation 1 Resistance value of thermistor Bx A R Rnxe In where T is in Kelvin degrees K B 4066 K Rn 100 reference value at temperature Tn 298 K The main specifications of the thermistor are listed in the following pages NTC thermistor rectangul
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