Operating Instructions Version 1.1
Contents
1. HT78 Operating Instructions Version 1 1 Table of contents Please add the titles and pages in English accordingly 1 Introduction Page x 1 INTRODUCTION Many thanks for selecting the HT78 from IROX In your hands you hold a high quality thermometer which we have equipped with additional functions that have above average design and functionality in a market comparison These include the measurement memory where in addition to the maximum and lowest values also the time and the date of the measurement per channel are recorded the so called time stamp The max min alarm that can be set for each of the 6 channels with the corresponding alarm status display and the individual scanning of the 5 radio sensors make it clearly structured and calculable to operate Please read the instructions carefully You will find some useful and interesting information that goes beyond merely the explanation of its operation 2 OPERATING ELEMENTS 2 1 LCD DISPLAY All functions are depicted on the liquid crystal display LCD in 3 windows 632 230208 3600 68 68 98 T EDI a a Pe CHY gm AA CHE pi 26 HOUR co JC en Cak ag ET it Ho Full segment display Time window Time display Date display With display of the saved thermo data time and date of the recording temporary Radio measurement channels 1 5 Current temperature measurement of the selected channel radio sonde Memory values min max of the2. are reset to the current value The recordings of the other channels remain 5 2 3 Measurement unit C or F You can change the unit of temperature from C to F see Chapter 2 2 The setting on the display appliance or the sensor is to be made independent of one another and only affects the display of the corresponding device 5 2 4 Temperature alarm The temperature alarm function is programmed individually per channel CH1 CH5 Each alarm is defined by an upper and lower limit If this is exceeded or undercut an acoustic and optical alarm is triggered Important general information about the thermo alarm An alarm programmed on Channel 1 can only be triggered by the sensor 1 Each channel thus has its own alarm range The temperature alarm can be set in steps of 0 5 C 0 9 F So as not to trigger any permanent alarm with minor changes around the alarm limits the alarm trigger has a hysterisis of 0 5 C 0 9 F l e if an alarm has been triggered the new measurement value must fall under the alarm value by at least 0 5 0 9 F to switch off the active alarm automatically Example An HI alarm at 24 first has to be set to inactive when it reaches 23 5 C again This prevents the measurement around a certain point triggering an alarm permanently Only one alarm can be programmed if really only one sensor resp one measurement is available at this point Should e g no sensor be available on Channel 4
3. or 5 lines appear there instead of a temperature and the programming as described above cannot be done Activation deactivation of the temperature alarm 1 Press the CHANNEL key until the desired channel display D CH1 CH5 flashes 2 Press and now hold the ALARM key for approx 3 seconds until HI C appears in the display 3 You can now switch on the alarm with the SET key When set for the first time HI 30 0 C HI 86 0 F will appear with a symbol A The number in the triangle refers to the channel for which the alarm is active Another pressing of the SET key switches the alarm off again Continue to the lower limit LO with the ALARM key An operation must be done within approx 6 seconds otherwise the appliance automatically jumps back into the normal display 4 Ifyou want to change the value please now hold the SET key pressed for at least 3 seconds until the alarm limit starts to flash With the and keys you can now change the limit in steps of 0 5 C 0 9 F upwards or downwards Continue to the setting of the LO limit lower limit with the SET key If you do not press any key in this setting for more than 2 minutes the appliance will automatically jump back into the normal display 5 The setting of the lower limit is done in an analogous manner to steps 3 and 4 The specification at the LO limit is 5 C 41 F But instead of moving from HI to LO you simply move with the next step back into the normal di
4. selected channel temporary Alarm status of the selected channel Battery status of the sender displayed Interior thermo Temperature of the display device measures at the place where the device is used Memory values min max of the interior thermometer temporary Alarm status of the interior thermometer Battery status of the display device Temporary means that this information has to be called up manually and is then depicted on the display only for a few seconds 2 2 KEYS View from front ALARM SEARCH CLEAR Koran f serpe mation CHANNEL press briefly In normal operating mode Changes from channel to channel gt 1 gt 2 gt 3 gt 4 gt 5 gt gt etc In the various setting modes Increases the value to be set hold pressed for fast run through MEMORY press briefly In normal operating mode Call up of the data from the thermo memory MAX gt MIN gt MAX gt etc In the various setting modes Reduces the value to be set hold pressed for fast run through SET In normal operating mode No function In the time setting mode Jumps with each press from setting element to setting element In the thermo alarm setting mode a Press briefly Switching on off of the HI LO limits b Hold pressed Activating the setting mode of the alarm values and change with the or keys Close again by briefly pressing the SET key By pressing the CHANN
5. EL and MEMORY keys at the same time and holding them for approx 3 seconds it is possible to change into the time setting mode ALARM Hold pressed for 3 seconds The setting mode of the thermo alarm is activated SEARCH Hold pressed for 3 seconds For the radio channel active on the display CH1 CH5 flashing a sender search is started This key is inactive when is active CLEAR Hold pressed for 3 seconds For the channel active and flashing on the display CH1 CH5 the MAX MIN memory is reset View from behind with battery lid opened Battery compartment 2 x 1 5 batteries of the size UM 3 resp AA C F switchover When the battery compartment is opened you will find above the CE label a press button with which the temperature measurement unit displayed on the LCD can be changed from C to F and vice versa at any time and independently of the setting on the sensor The key can be operated with a sharp object paper clip tip of a pen etc single short pressing of the key 3 PUTTING INTO OPERATION Put all radio sensors that you want to use into operation and place these in close proximity 1 2 metres to the reception device 2 Open the battery compartment of the display device and remove all insulation strips If no batteries are in the device insert the 2 batteries UM 3 or AA 1 5 V in the correct polarity 3 Now close the battery compartment 4 Dir
6. active in a slightly more sedate rhythm Please read the note on hysterisis at the beginning of this chapter 6 CHANGE OF BATTERY BATTERY CHANGE DISPLAY pa The batteries last for around 8 12 months Depending on the usage of the appliance and the batteries used this time can be slightly shorter or longer In order to avoid a surprising and unpleasant interruption to operations the battery symbol appears in the two temperature windows with the corresponding channel This means that batteries of the display appliance in the IN window or of a radio sender in the CHx window are becoming too weak and need to be replaced To change the batteries please note Chapter 3 Putting into operation Please only use new batteries and never mix old and new batteries Please also remember that used batteries should not be thrown in the household rubbish bin but handed in at the designated collection points The environment will thank you for it 7 CARE INSTRUCTIONS Do not expose the device to extreme temperatures or direct sunlight over longer periods Avoid blows and shocks of any kind to the device For cleaning use a dry soft cloth that you have moistened with water and a mild cleaning agent Never use volatile substances such as benzene thinner cleansing agents in spray cans etc When the device is not being used store it in a dry area and out of the reach of small children If the device is activated under extreme coldne
7. ectly after the activation of the batteries all segments are displayed for a few seconds on the display The HT78 then begins with the time at 0 00 and 1 1 08 and the search of available sensors on all 5 channels 5 Now set the time and the date and reset all Min Max memories with the CLEAR key This guarantees that you will be able to read the valid MIN MAX recordings with a valid time date 6 As soon as the sensor is displayed correctly see Reception status in Chap 4 you can set up the sensor in the place where you want to effectively measure the outdoor temperature Under the most ideal conditions this can be up to 30 m away In reality however this is often less In the event of problems try out other places and do so both for the sensor and for the display device The radio sensor is weatherproof Nevertheless please place the sensor where possible in the dry and at any rate in the shade 4 RADIO THERMOMETER The operation of the radio sensor supplied is described in the instructions which are delivered separately Other Irox radio sensors that are compatible with the HT78 3 channels can be used on the channels 1 2 or 3 HTS12C HTS33 HTS13 HTC13 5 channels can be used on all 5 channels HTS55 HTC13 is included in the scope of delivery of the HT78 and can be used on the channels 1 3 With the sensors with thermo and hygrometer simply only the temperature is displayed on the HT78 Reception status displa
8. g as the element is flashing You can now move from setting to setting with a single brief pressing of the SET key The procedure of the settings is as follows Date setting year gt month gt day Time format 24 hours or 12 hours AM PM display Time setting Hour gt Minute You cannot directly interrupt the setting process You then therefore go through the entire selection of settings with the SET key until the time of day reappears again after the minutes setting with the flashing In the time If you do not press a key in setting mode for more than 2 minutes the settings made will be adopted and the time of day displayed 5 2 THERMOMETER WITH ALARM With regard to operation the HT78 is in a sleep mode when no key is pressed for more than 2 minutes This status is then recognised by the fact that on the left hand side of the display neither the symbol nor the number in the channel display is flashing In such a case the operation is activated by pressing one of the 3 keys The corresponding symbol then flashes in the field to be operated Oor CH with corresponding number The HT78 measures the temperature directly and also receives the measurements of up to a maximum of 5 IROX thermo radio sensors Each sensor can be set to one of the channels 1 5 resp 1 3 for 3 channel appliances In the two information windows radio sensors CH1 5 and the temperature currently measured is dis
9. m when a battery tester rates them as still being sufficient Further info on this can be found in the FAQ on www irox com Note If the outdoor temperature drops sharply the output of batteries that have been started is also strongly reduced It is therefore recommended that new batteries are always inserted in the sensor at the beginning of the winter alkaline type or better 3 whether disturbances or shields are to be found in the area of the sender receiver or the distance between the two devices is too great The search processes described above for a lost sensor do not have any influence on any other existing sensors that function without problems Signal collisions Radio signals of other devices in their environment can cause disruptions or temporary interruptions in reception This is not bad but could be annoying under certain circumstances Such typical disruptive systems are radio door bells wireless security systems tube screens PC TV control systems etc In such cases it can also be helpful to use another channel 5 OPERATION 9 1 TIME The time hh mm and the date are depicted in the upper information window Time setting e SET e By pressing the CHANNEL and MEMORY keys at the same time and holding them for approx 3 seconds it is possible to change to the time setting mode The element to be set starts flashing in the display With the and keys you can now make a setting for as lon
10. played in C or F The following operations can be made in this function 5 2 1 Reading of the temperature from each channel Activate the CHANNEL key briefly to jump from channel to channel The next channel is displayed with each press of the button and activated for other operations The sequence of the activation is gt CH1 gt CH2 gt CH3 gt CH4 gt CH5 gt gt CH1 gt etc This is independent of whether a radio sensor is available in the system or not Note The measurement is always depicted in the lower window the channels 1 5 one after the other in the middle window 5 2 2 MIN MAX memory a With the MEMORY key you can read the Max Min memory of the active channel by pressing it briefly flashing symbol or CH1 CH5 The corresponding MIN MAX value is displayed together with the date and the time of the recording time stamp Each value will appear for approx 4 seconds in the following sequence on the display Maximum highest temperature MAX Minimum lowest temperature MIN Back to display of the current measurement The sequence can also be made manually by pressing the MEMORY key All values shown have been recorded since the last memory reset If no data are available lines appear b Reset of the MIN MAX memory If you hold the CLEAR key pressed for approx 3 seconds the MIN MAX memory values of the active channel flashing symbol or CH1 CH5
11. splay Note 1 The HI limit can be set below the LO limit or the LO above the HI respectively The logics of the alarm activation are retained namely Triggering of the HI alarm when the limit is exceeded bottom up Example With an alarm of 38 C the alarm is triggered when the measurement value jumps from 36 6 C to 38 2 C Triggering of the LO alarm when the threshold is undercut top down Example With an alarm of 6 C the alarm is activated when the measurement value of 7 2 jumps to 5 5 C Note 2 If you want an alarm both a HI and a LO limit need to be set If you only want one of these simply set the limit you don t need to the extreme HI 70 C or 76 8 F LO 50 C or 58 F Note 3 You can programme independent alarms for each channel Acknowledgement of an alarm If an alarm limit is exceeded an acoustic alarm sounds out for approx 2 minutes and the symbols belonging to the channel AN and the HI or LO display flash During the 2 minutes of acoustic alarm the measurement value remains on the measurement value that triggered the alarm You have to acknowledge the alarm with any key Until you have done so a short beep beep will sound out every minute once the 2 minutes of acoustic alarm are over The current measurement value is displayed again on the display after the 2 minutes have ended or manual acknowledgement has been given however the symbols flash for as long as the alarm is still
12. ss it may occur that the display becomes illegible As soon as it is returned to a warm environment the device will function normally Please keep the user s manual and other documents delivered with the device stored carefully so that you can reference them at a later point if necessary Please use only new batteries and never mix old and new batteries Please also remember that old batteries should not be disposed of with household waste but should be handed in at the designated collection centres Important With all Irox appliances all disposal fees in Switzerland VRG advance recycling fee and in the EU WEEE have been paid 8 SUPPORT This device is a new development of Irox Development Technology All information was made and checked by means of a functioning instrument It may occur that adjustments and improvements of the device will take place that due to typographical procedures were not able to be listed in this manual Should you notice deviations which make it difficult for you to operate and use the instrument you may at any time download the latest manual onto your PC free of charge at www irox com please refer to the version number of the manual Irox Development Technology 9 TECHNICAL DATA DISPLAY UNIT Temperature measurement Measurement range Maximum range 50 0 C to 70 0 C 23 0 F to 122 0 F Internal sensor 20 C to 50 C Radio sensor Pursuant to the specifications of the sensor Resolu
13. tion 0 1 C 0 2 F Measurement accuracy 1 C in the range of 5 C to 40 C 2 C in the remaining range Measurement frequency of radio sensor once every 60 seconds Clock Accuracy of quartz clock 30 seconds month Power 2 pieces UM 3 or AA 1 5V batteries Dimensions Weight Display unit 211g incl batteries 110 x 123 x 30 mm
14. y The wave symbol indicates the status of the signal reception of the channel displayed The unit is in searching mode Temperature readings are securely registered No signals Start search process for a sensor Select the desired radio channel with the CHANNEL key Example Channel 4 the number 4 is flashing lim Ed CHY Now press and hold the SEARCH key until the wave symbol starts to flash The device now searches for the sensor on channel no 4 This process can take a few minutes and is finished as soon as the wave symbol stops flashing We have deliberately ensured that the search channel can be individually called up per channel so that sensors that are already logged in are not affected by subsequent enhancements Signal interruptions Each sensor is read by the device once a minute If more than 8 readings are read one after the other without data lines appear in the display for this channel and the HT78 then stops any other reception attempts after this for 8 hours The display device starts a reception again by itself after approx 8 hours If the original sender is not found again the device starts with a new search for a new sensor on this channel When the signal is interrupted you can start a new signal search at any time manually Please however check the following points beforehand _ whether the sensor is still in place 2 the batteries of the sensor and the display device Please also replace the
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