HygroClip 2 (HC2) Humidity Temperature Probes User Guide
Contents
1. Rotronic AG E M HC2 Probes V1 26 Bassersdorf Switzerland Document code Unit HygroClip 2 HC2 Humidity Temperature Instruction Manual Probes User Guide Document Type Page 1of 31 Document title HygroClip 2 HC2 Humidity Temperature Probes User Guide 2009 2013 Rotronic AG E M HC2 Probes V1_26 Rotronic AG E M HC2 Probes V1 26 Bassersdorf Switzerland Document code Unit HygroClip 2 HC2 Humidity Temperature Instruction Manual Probes User Guide Document Type Page 20f31 Document title Table of contents DE ST EEE 1 1 Hardware and software compatibility is 2 MOONS ME E A T E T A 3 General description oai once cte edda arnad ck ea dds Eada udo ez ka s ga aait d ada asa sme didadada kant 3 1 Power supply 3 2 Measured parameters 3 3 Calculated parameters 3 4 Analog output signals 3 5 Digital interface 3 6 Connector esesssse 3 7 Sensor protection dust filter 4 User configurable settings and functions 22 2 cceeeccee sence eeeeeeeeeeeeeeeeeeneeees 4 1 Function overview 00 cee eee cene cette eeteeeeeeteeeetenaeees 4 2 Factory default settirigs 5 2 eiie tereti eta DE eom DEZ Dea Eder an e E Lo E epe E dendo 5 Mechanical installation eet eee ttes eot ten coved deccoeteguscces coued2. e direct current from 60 V to 400 V unshielded in separated bundles or channels e alternate current from 25V to 400 V conduits without minimum distance unshielded e direct and alternate current gt 400 V unshielded in separated bundles or channels Telephone lines conduits without minimum distance e lines leading into EX rated areas 2009 2013 Rotronic AG E M HC2 Probes V1 26 Rotronic AG E M HC2 Probes V1 26 Bassersdorf Switzerland Document code Unit HygroClip 2 HC2 Humidity Temperature Instruction Manual Probes User Guide Document Type Page 20 0f31 Document title Lightning protection Cabling in areas with a risk of lightning requires a lightning protection For cabling underground in between buildings we recommend the use of special fiber optic cables If this is not possible use copper cables that are suitable for underground installation 6 2 Analog signal wiring Preferably use a shielded cable to connect the analog outputs of the HC2 to other devices The maximum cable length is determined by the maximum error that the user will accept This can be calculated as follows Error V 7 cable resistance x current through load 6 3 Minimum analog output load The HC2 analog outputs are short circuit tolerant and have an internal resistance of less than 10 O For proper operation the minimum external load of each output should be at least 1000 O 6 4 Digital signa
3. gt Humidity temperature adjustment 1 point or multi point humidity calibration or adjustment 1 point or 2 point temperature calibration or adjustment Generate a time stamp for calibrations and adjustments Retain and view last adjustment date and adjustment values Generate calibration and adjustment protocols 00000 gt Automatic humidity sensor test and optional drift compensation Tests the humidity sensor for drift caused by contaminants and can be used to automatically apply a correction The test is automatically carried out at regular intervals of time Can be configured enabled or disabled The humidity sensor status can be verified either with the HW4 software and is shown as Good SQ tuned corrected for drift or Bad defective gt Data recording The data recording function differs from a true data logging function in the sense that the AirChip 3000 does not time stamp the data This data recording function can be used to investigate events such as a sensor malfunction as well as to retrieve data that would otherwise be lost o Start or stop data recording up to 2000 value pairs 6RH and temperature Starting a recording session erases all previously recorded data o The recording mode and log interval can be specified o When the probe is powered off the recording session is paused but not ended As long as the recording session has not been ended the probe automatically resumes recording data whe
4. 60 C 85 C 6 8 10 0 20 40 60 80 100 120 140 160 180 200 Cable Length cm Error on temperature Temperature measurement accuracy is specified at 0 3 C when both the temperature sensor and the cable are at 23 C When the full length of the 2 meter probe cable is exposed to temperature values within the range of 40 to 85 C the additional error is limited to 0 125 C 11 Accessories and parts For accessories and parts such as the HWA configuration software extension cables adapter cables calibration accessories and spare dust filters please see document E M HC2 accessories 12 Supporting documents E M HC2 accessories Accessories and parts for probes indicators and transmitters 2009 2013 Rotronic AG E M HC2 Probes V1_26 Rotronic AG E M HC2 Probes V1 26 Bassersdorf Switzerland Document code Unit HygroClip 2 HC2 Humidity Temperature Instruction Manual Probes User Guide Document Type Page 30 0f 31 Document title E T AC3000 DF V1 AirChip 3000 Description and Main Functions E M HW4v3 DIR List of the HW4 manuals HW4 software version 3 General instructions and functions common to all devices E M HW4v3 Main HW4 software version 3 HC2 probe series EM ae Tenn Device configuration and AirChip 3000 functions E M HW4v3 A2 001 HW4 software version 3 Probe Adjustment function AirChip 3000 devices E M HW4v3 DR 001 HW4 software version 3 Data Recording Functio
5. See System Accuracy effect of VDD Nominal current consumption 4 5 mA at VDD 3 3 5 VDC Maximum start up current unlimited 50mA during 2us Minimum start up current Maximum current spike during operation 8 mA during 2ms and 5 mA during 2s 1 mA during maximum 2ps Polarity protection Mechanical only keyed connector Sensor ROTRONIC Hygromer IN1 Measuring range 0 100 RH Measurement accuracy at 23 C with 3 3 VDC supply voltage Repeatability 0 8 RH w standard adjustment profile 1 0 RH for models HC2 C04 and HC2 C05 see also 810 3 0 3 RH Long term stability lt 1 96RH year Sensor time constant Typical 10 sec 63 of a 35 to 80 RH step change 1m sec air flow at sensor Sensor Measuring range Measurement accuracy at 23 C with3 3 VDC supply voltage Pt100 RTD IEC 751 class A 100 200 C see also environmental limits 0 1 C 0 3 C for models HC2 C04 and HC2 C05 see also 10 3 Repeatability 0 05 C Long term stability lt 0 1 C year Sensor time constant Typical 4 sec 63 of a step change 1m sec air flow at sensor Psychrometric calculations Dew or frost point user configurable Start up time 1 5s typical Data refresh rate 1 0s typical when not calculating any parameter 2009 2013 Rotronic AG E M HC2 Probes V1 26 Do
6. When using a humidity probe with a portable indicator it is good practice to monitor the display for temperature stability When moving the probe from one area to another the probe should be given sufficient time to equilibrate with the environment to be measured This time can be shortened and errors avoided by using the probe configuration that fits best for your application In extreme situations condensation may occur on the sensors when the probe is colder than the environment As long as the humidity temperature limits of the humidity sensor are not exceeded condensation does not alter the calibration of the sensor However the sensor has to dry out before it can provide a valid measurement Non moving air is an excellent insulator When there is no air movement surprising differences in temperature and humidity can noted over short distances Air movement at the probe generally results in measurements that are both faster and more accurate 2009 2013 Rotronic AG E M HC2 Probes V1 26 Rotronic AG E M H C2 Probes V1 _26 Bassersdorf Switzerland Document code Unit HygroClip 2 HC2 Humidity Temperature Instruction Manual Probes User Guide Document Type Page 24of 31 Document title 8 Maintenance 8 1 Cleaning or replacing the dust filter Depending on the conditions of measurement the filter should be checked from time to time Corroded discolored or clogged filters should be replaced e I
7. Simulator mode Disabled o Fora detailed description of all AirChip 3000 probe main functions see document E T AC3000 DF V1 o Instructions regarding the configuration of the probe and access to its functions are provided in the following manuals E M HW4v3 Main E M HWAv3 F2 001 E M HW4v3 DR 001 E M HW4v3 A2 001 E M AC3000 CP 2009 2013 Rotronic AG E M HC2 Probes V1_26 E M HC2 Probes V1 26 DERE Bassersdorf Switzerland Document code Unit HygroClip 2 HC2 Humidity Temperature Instruction Manual Probes User Guide Document Type Page 18 of 31 Document title 5 Mechanical installation Note the following instructions apply only to the situation where the HC2 probe is fixed installed 5 1 General guidelines for fixed installation For best results please observe the following guidelines o Install the probe at a location where humidity temperature and pressure conditions are representative of the environment or process to be measured Avoid the following a Close proximity of the probe to a heating element a cooling coil a cold or hot wall direct exposure to sun rays etc b Close proximity of the probe to a steam injector humidifier direct exposure to precipitation etc c Unstable pressure conditions resulting from excessive air turbulence o When installing the probe on a wall do not place the probe right above a heat producing device of instrument such as a transmitter or an
8. E 15 2009 2013 Rotronic AG E M HC2 Probes V1 26 Rotronic AG E M HC2 Probes V1 _26 Bassersdorf Switzerland Document code Unit HygroClip 2 HC2 Humidity Temperature Instruction Manual Probes User Guide Document Type Document title Page 5of31 For use with indicators data loggers and transmitters with or without an extension cable Humidity measuring range 0 100 RH Temperature limits 50 100 C 58 212 F Diameter 15mm 0 6 length 107 mm 4 3 HC2 SM Housing and filter cap stainless steel 1 4301 Standard dust filter SP M15 wire mesh DIN1 4401 Accurate measurements require full immersion in the environment to be measured Weight approx 47 g 1 66 oz 110 15 2009 2013 Rotronic AG E M HC2 Probes V1 26 Rotronic AG E M HC2 Probes V1 26 Bassersdorf Switzerland Document code Unit HygroClip 2 HC2 Humidity Temperature Instruction Manual Probes User Guide Document Type Document title Page 60f31 For use with indicators data loggers and transmitters HC2 C04 Humidity measuring range 0 100 RH Temperature limits 40 85 C 40 185 F Diameter 4 mm 0 16 cable length electronics probe tip about 0 59 m 1 9 ft Probe electronics housing polycarbonate black Weight approx 150 g 5 3 oz eto EL HC2 C05 Same as HC2 C05 but with 5 mm diameter 0 2
9. looking at probe Pin Wire Color Name Function 1 Green VDD 3 3 to 5 VDC 2 Grey GND Power and digital signal 3 Red RXD UART 4 Blue TXD UART 5 White Out 1 analog Humidity 0 100 RH default 6 Brown Out 2 analog Temperature 40 60 C default 7 Yellow AGND Analog signal ground Sensor protection dust filter Most probes of the HC2 series are supplied with a filter to protect the sensors against dust particles and high air velocity Depending on the probe model the following types of filter materials are used Material Maximum temperature Notes Polyethylene 100 C 212 F Recommended filter material for all applications below 100 C Good response and good protection against fine dust particles No water absorption or retention Teflon 200 C 392 F Good protection against fine dust particles and response salt marine environments Moderately slow Stainless steel wire mesh 200 C 392 F Provides fastest response time Not recommended in environments with fine dust particles clogging and in bioactive environments Stainless steel sintered filter 200 C 392 F Good response at low humidity levels Do not use at high humidity levels Provides best protection against abrasive particles Note Depending on the probe model the dust filter is either automatically included with the probe or it must be ordered separat
10. 2 Dew point accuracy The HC2 probes can be configured to calculate either the dew point or frost point based on the measurement of relative humidity and temperature The accuracy of this conversion varies depending on the humidity and temperature conditions as shown in the graph below DPIFP Accucary DP FP C Temperature C Example at a temperature of 20 C a dew point value of 37 C is measured with an accuracy of 1 0 C or better 2009 2013 Rotronic AG E M HC2 Probes V1_26 Rotronic AG E M HC2 Probes V1 26 Bassersdorf Switzerland Document code Unit HygroClip 2 HC2 Humidity Temperature Instruction Manual Probes User Guide Document Type Page 29 of 31 Document title 10 3 Effect of cable temperature on the accuracy of probes HC2 C04 and HC2 C05 Accuracy of the HC2 C04 and HC2 C05 probes is affected by the temperature of the cable separating the sensors from the electronics Error on humidity Humidity measurement accuracy is specified at 1 0 RH when both the humidity sensor and the cable are at 23 C Depending both on the value of temperature and on the exposed length of cable the probe exhibits a predictable error bias as illustrated below Systematic error as a function of the length of cable exposed to temperature 10 8 6 j 40 C 20 C E rd o0 c P of 23 C o o E 2 40 C p
11. 7 4 Connectivity examples for stand alone probes Digital connection example RS 485 network Master Addr 1 USB or TCP IP port RS 485 device connectors s MOD 240 Q j apter T Connection Slave HC2 probe Addr n Notes o The master device can be either a transmitter such as the HF5 USB or TCP IP interface or an adapter such as the AC3010 cable USB o Power to the combination E2 01XX MOD and HC2 probe can be provided by an individual AC adapter or by a central voltage source connected to the RS 485 network requires cables with 2 twisted pairs one for the data the other for power 2009 2013 Rotronic AG E M HC2 Probes V1 26 Rotronic AG E M HC2 Probes V1 26 Bassersdorf Switzerland Document code Unit HygroClip 2 HC2 Humidity Temperature Instruction Manual Probes User Guide Document Type Page 230f31 Document title Analog connection example Voltage Source 5 24 VDC or 5 16 VAC E2 01XX ACT Cable ended with open wires Voltage Adapter Controller 2 x analog signal or other HC2 probe 0 1 VDC 7 5 Hand held probes used with an indicator The most common source of error when measuring relative humidity with a hand held probe is a difference between the temperature of the probe and the temperature of the environment At a humidity condition of 50 RH a temperature difference of 1 C 1 8 F typically results in an error of 3 RH on relative humidity
12. AC3005 see document E M HC2 accessories The probe can also be indirectly connected to a PC using an instrument from the ROTRONIC program The ROTRONIC HWA software version 2 1 0 or higher allows full access to the following Measurement data humidity and temperature and calculated parameter dew or frost point Probe information name RS 485 address humidity sensor status etc Probe alarm functions Probe data logging function Probe calibration and probe adjustment functions Probe configuration The ROTRONIC HWA software version 3 3 0 or higher allows full access to the following e Firmware update of HygroClip probes Communication protocol options The probe measurement data can be read without having to use the ROTRONIC HWA software Starting with firmware version 1 3 the HC2 probe offers the following communication protocol options ASCII which can be selected by connecting the probe to a PC running the ROTRONIC HWA software version 2 1 1 or higher o RO ASCII this is the standard default communication protocol used by all AirChip 3000 devices and by the HW4 software In principle this protocol supports all of the AirChip 3000 functions but some of the functions require a certain amount of computations to be carried out by an external device such as a PC o Custom this communication protocol can be used to provide compatibility of the HC2 probe with an existing communication system The Custom communication protoco
13. Connectors cables and digital interface adapters are available to this purpose Digital integration with OEM applications is facilitated by the probe communication protocol options The HC2 probes offer the following user functions User configurable settings Calculation of the dew or frost point Humidity temperature calibration and adjustment Simulator mode Automatic humidity sensor test and drift compensation Sensor failure mode Data recording The ability for the user to easily update the AirChip 3000 firmware means that the HC2 probes can be kept up to date regarding any future functionality improvement Available in different configurations the HC2 probe series is designed to meet the requirements of a large number of applications and environments 1 4 Hardware and software compatibility The HC2 probes are compatible only with the AirChip 3000 generation of ROTRONIC humidity temperature instruments and are not backward compatible with instruments based on the previous technology Configuration of the HC2 probes and access to the probe functions requires a PC with the ROTRONIC HW4 Software version 2 1 0 or higher or connection to a compatible instrument from ROTRONIC For firmware updates HWA software version 3 3 0 or higher is needed 2009 2013 Rotronic AG E M HC2 Probes V1 26 Rotronic AG E M H C2 Probes V1 _26 Bassersdorf Switzerland Document code Unit HygroClip 2 HC2 Humidity Temperature Instruction Manu
14. Ethernet adapter warm air tends to rise o If possible choose a location that provides good air movement at the probe air velocity of at least 1 meter second 200 ft minute facilitates adaptation of the probe to changing temperature o When installing the probe through a wall immerse as much of the probe as possible in the environment to be measured OK ee OK Position the probe so as to prevent the accumulation of condensation water at the level of the sensor leads Install the probe so that the probe tip is looking downward If this is not possible install the probe horizontally Depending on the probe model a probe holder mounting flange with a compression fitting can facilitate installation through a wall Future maintenance can be made easier by providing next to the probe a calibration access orifice During maintenance this permits the insertion of a reference probe calibrator The calibration access orifice should have the same size as the orifice used to install the probe and can be equipped with a probe holder 2009 2013 Rotronic AG E M HC2 Probes V1 26 Rotronic AG E M HC2 Probes V1 26 Bassersdorf Switzerland Document code Unit HygroClip 2 HC2 Humidity Temperature Instruction Manual Probes User Guide Document Type Page 19 0f31 Document title 6 Electrical installation Note the following instructions apply only to the situation where the HC2 probe is fixed installed 6 1
15. number of the firmware All firmware files have the extension HEX For connecting the HC2 probe to a PC use any of the following digital adapter cables AC3001 AC3002 or AC3005 see document E M HC2 accessories Procedure for updating the firmware Connect the HC2 probe to the HW4 PC as explained in the HW4 manual E M HW4v3 Main Copy the firmware update file from the ROTRONIC website to the PC Start HW4 software on the PC and search for the HC2 probe HW4 Main Menu Bar gt Devices and Groups gt Search for USB masters or Search for RS232 masters or search for Ethernet masters depending on the connecting cable After finding the HC2 probe expand the device tree to see the HC2 probe functions Select Device Manager In the Device Manager menu bar select Tools Firmware Update For instructions see document E M HW4v3 F2 001 2009 2013 Rotronic AG E M HC2 Probes V1 26 Document code E M HC2 Probes V1 26 Rotronic AG Bassersdorf Switzerland Unit Probes User Guide Document title HygroClip 2 HC2 Humidity Temperature Instruction Manual Document Type Page 26 0f31 10 Technical data 10 4 Specifications Device type Humidity temperature probe Mechanical configuration See models Supply voltage VDD 3 3 5 VDC 0 Recommended supply voltage 3 3 VDC Supply voltage during factory tests and adjustment 3 3 VDC Supply voltage stability ripple
16. 2 IC3xx A but with 550 mm barrel length 21 6 Weight with 2 m cable approx 350 g 12 3 oz 80 g 2 8 oz per additional meter Same as HC2 IC3xx A but with 700 mm barrel length 27 5 Weight with 2 m cable approx 380 g 13 4 oz 80 g 2 8 oz per additional meter HC2 IC302 A HC2 IC305 A HC2 IC402 A HC2 IC405 A HC2 IC502 A HC2 IC505 A HC2 IC702 A HC2 IC705 A 250 400 150 550 700 103 eee TU 2009 2013 Rotronic AG E M HC2 Probes V1 26 Rotronic AG E M HC2 Probes V1 26 Bassersdorf Switzerland Document code Unit HygroClip 2 HC2 Humidity Temperature Instruction Manual Probes User Guide Document Type Document title Page 10 0f31 Process measurement fixed installation For use with transmitters and data loggers Humidity measuring range 0 100 RH Temperature limits at sensor 100 200 C 148 392 F HC2 IM102 Barrel diameter 15 mm 0 6 length 120 mm 4 7 See note below HC2 IM105 Probe cable length 2 m 6 5 ft or 5 m 16 4 ft Barrel stainless steel Filter base SP MSB15 Filter cartridge to be ordered separately Weight with 2 m cable approx 260 g 9 2 oz 80 g 2 8 oz per additional meter HC2 IM302 Same as HC2 IM1xx but with 280 mm barrel length 11 0 for through wall installation HC2 IM305 Weight with 2 m cable approx 400 g 14 1 oz 80 g 2 8 oz per additional meter HC2 IM402 Same
17. Can be equipped with Teflon dust filter SP TO5 Weight approx 160 g 5 6 oz Note accuracy of the HC2 C04 and HC2 C05 probe models is affected by the temperature of the cable separating the sensors from the electronics see 810 3 Handheld probe for use with indicators and data loggers HC2 HK25 Humidity measuring range 0 100 RH Temperature limits at sensor 100 150 C 148 302 F Barrel diameter 15 mm 0 6 length 250 mm 9 8 Probe cable length 2 m 6 5 ft Handgrip POM black barrel PEEK black Filter base NSP ME with wire mesh filter cartridge SP M15 Weight approx 210 g 7 4 oz HC2 HK40 Humidity measuring range 0 100 RH Temperature limits at sensor 100 200 C 148 392 F Same as HC2 HK25 but with barrel 400 mm barrel length 15 7 Weight approx 240 g 8 5 oz et ire es Ine SEE 400 2009 2013 Rotronic AG E M HC2 Probes V1_26 Rotronic AG E M HC2 Probes V1 26 Bassersdorf Switzerland Document code Unit HygroClip 2 HC2 Humidity Temperature Probes User Guide Document title Instruction Manual Document Type Page 7 of31 Handheld probe for use with indicators and data loggers HC2 P05 Humidity measuring range 0 100 RH Temperature limits 40 85 C 40 185 F Barrel diameter 5 mm 0 2 length 200 mm 7 9 Probe cable length 2 m 6 5 ft Handgrip POM bl
18. General guidelines for fixed installation Power supply wiring Heavy machinery and instrumentation should not share the same power supply wiring If this cannot be avoided noise filters and surge protectors should be used Most UPS devices have those features already integrated General guidelines for signal cables The following guidelines are derived from European Standard EN 50170 for the transmission of signals by copper wires When planning an installation the rules provided by EN 50170 should be followed under consideration of local circumstances to determine the position of machines and equipment All ROTRONIC HygroClip products are tested for Electromagnetic Compatibility according to EMC Directive 2004 106 EG and following European standards EN 61000 6 1 2001 EN 61000 6 2 2005 EN 61000 6 3 2005 EN 61000 6 4 2001 A11 Whenever the level of electromagnetic interference is expected to be high both the instruments and signal cables should be placed as far away as possible from the source of interference In general signal cables should be installed in bundles or channels conduits separate from other cables as indicated in the table below Bus signals such as RS485 Data signals for PCs printers etc shielded analog inputs unshielded direct current lt 60V in common bundles or channels conduits shielded process signals lt 25 V unshielded alternate current lt 25V coaxial cables for CRT monitors
19. H Temperature limits at sensor 100 200 C 148 392 F Barrel diameter 15 mm 0 6 length 100 mm 3 9 See note below Probe cable length 2 m 6 5 ft or 5 m 16 4 ft Barrel PEEK Filter base NSP ME Filter cartridge to be ordered separately Weight with 2 m cable approx 230 g 8 1 oz 80 g 2 8 oz per additional meter Same as HC2 IC1xx but with 250 mm barrel length 9 8 for through wall installation Weight with 2 m cable approx 260 g 9 2 oz 80 g 2 8 oz per additional meter 103 1 6 100 250 39 2 meaa Note HC2 IC1 100 mm barrel length to avoid measurement errors due to temperature gradients fully immerse the probe barrel in the environment to be measured HC2 IC102 HC2 IC105 HC2 IC302 HC2 IC305 Process measurement fixed installation For use with transmitters and data loggers Humidity measuring range 0 100 RH Temperature limits at sensor 100 200 C 148 392 F Barrel diameter 25 15 mm 1 0 0 6 length 250 mm 9 8 Probe cable length 2 m 6 5 ft or 5 m 16 4 ft Barrel PEEK black Filter base NSP ME Filter cartridge to be ordered separately Designed for through wall installation Weight with 2 m cable approx 290 g 10 2 oz 80 g 2 8 oz per additional meter Same as HC2 IC3xx A but with 400 mm barrel length 15 7 Weight with 2 m cable approx 320 g 11 3 oz 80 g 2 8 oz per additional meter Same as HC
20. IE305 Humidity measuring range 0 100 RH Temperature limits at sensor 100 200 C 148 392 F G 77 thread for maximum 100 bar 1450 PSI HC2 IE102 M Probe cable length 2 m 6 5 ft or 5 m 16 4 ft HC2 IE105 M Barrel stainless steel Filter base SP MSB15 Filter cartridge to be ordered separately Weight with 2 m cable approx 340 g 12 0 oz 80 g 2 8 oz per additional meter Humidity measuring range 0 100 RH Temperature limits at sensor 100 200 C 148 392 F NPT 77 thread for maximum 100 bar 1450 PSI Probe cable length 2 m 6 5 ft or 5 m 16 4 ft Barrel stainless steel Filter base SP MSB15 Filter cartridge to be ordered separately see Accessories Weight with 2 m cable approx 340 g 12 0 oz 80 g 2 8 oz per additional meter HC2 IE302 M HC2 IE305 M 103 etii 3 1 2 G NTP Note 1 HC2 IExxx M probes are the same as HC2 IExxx but are equipped with a stainless steel connector instead of PPS Note 2 To avoid measurement errors temperature should be the same on both sides of the mounting wall 2009 2013 Rotronic AG E M HC2 Probes V1 26 Rotronic AG E M HC2 Probes V1 26 Bassersdorf Switzerland Document code Unit HygroClip 2 HC2 Humidity Temperature Instruction Manual Probes User Guide Document Type Page 12 of31 Document title General description 3 General description 3 1 Power supply The a
21. ack barrel stainless steel DIN 1 4305 Weight approx 160 g 5 6 oz 331 75 60 35 op emt TT wo N HC2 HP28 Handheld probe for use with indicators and data loggers Humidity measuring range 0 100 RH Temperature limits at sensor 40 85 C 40 185 F Barrel diameter 10 mm 0 4 length 280 mm 11 0 Probe cable length 2 m 6 5 ft Handgrip POM black barrel stainless steel DIN1 4301 Dust filter sintered steel filter cartridge ET Z10 Weight approx 200 g 7 1 oz HC2 HP50 Humidity measuring range 0 100 RH Same as HC2 HP28 but with barrel 500 mm barrel length 19 7 Weight approx 250 g 8 8 oz ef 60 135 280 500 ce Q gt es i elt e 2009 2013 Rotronic AG E M HC2 Probes V1_26 Rotronic AG E M HC2 Probes V1 26 Bassersdorf Switzerland Document code Unit HygroClip 2 HC2 Humidity Temperature Instruction Manual Probes User Guide Document Type Page 8 0f31 Document title Measurement of paper cardboard stacks and rolls Handheld probe for use with indicators and data loggers Humidity measuring range 0 100 RH Temperature limits at sensor 40 85 C 40 185 F Blade thickness 4 mm 0 16 width 22 mm 0 87 length 280 mm 11 0 He2 HS28 Probe cable length 2 m 6 5 ft Weight approx 240 g 8 5 oz Handgrip POM black blade aluminum elox HC2 HS42 Same as HC2 HS28 but with 420 m
22. al 0 05 C Humidity digital 0 25 RH Analog signals 2mV reference digital value Note for models HC2 IC HC2 IM and HC2 IE VDD is limited to 3 3 V 0 1V General specifications Housing material See Models Collar material connector Alu Anticorodal anodized Dust filter material See Models Protection grade IP 65 Physical dimensions See Models Weight See Models 2009 2013 Rotronic AG E M HC2 Probes V1 26 Rotronic AG E M HC2 Probes V1 _26 Bassersdorf Switzerland Document code Unit HygroClip 2 HC2 Humidity Temperature Instruction Manual Probes User Guide Document Type Page 28 of 31 Document title EMC Directive 2004 108 EG EN 61000 6 1 2001 EN 61000 6 2 2005 GE LEMC immunity EN 61000 6 3 2005 EN 61000 6 4 2001 A11 Solder type Lead free RoHS directive FDA GAMP directives compatible Storage and transit 50 100 C 0 100 RH non condensing 40 100 C 0 100 RH non condensing Operating limits at electronics Temperature limits at sensor See Models 100 RH up to 80 C 176 F 75 RH at 100 C 212 F 45 RH at 125 C 260 F 15 RH at 150 C 302 F Maximum air velocity at probe 20 m s 3 935 ft min Maximum humidity at sensor Critical environments Humidity sensor as per DV04 14 0803 02 Critical chemicals 10
23. al Probes User Guide Document Type Page 4of 31 Document title 2 Models In the following tables we have indicated the type of instrument primarily used with each probe model The following should also be noted e The HC2 probes can be directly connected to a PC or to an Ethernet network using one of the available digital interface adapters see separate document E M HC2 accessories e The HC2 Probes can also be used as a stand alone device with two analog output signals Different connectors are available to this purpose see separate document E M HC2 accessories Regardless of the probe model the analog outputs signals are always scaled in the same way by the factory 0 1 V 2 0 100 RH and O 1 V 40 60 C The user is responsible for reconfiguring the probe analog outputs requires the ROTRONIC HWA software and for providing power to the probe Climate measurement For use with indicators data loggers and transmitters with or without an extension cable Humidity measuring range 0 100 RH Temperature limits 50 100 C 58 212 F Diameter 15mm 0 6 length 85 mm 3 3 HC2 S Housing and filter cap polycarbonate black Standard dust filter NSP PCB PE Polyethylene Accurate measurements require full immersion in the environment to be measured Weight approx 10 g 0 35 oz HC2 S3 Same as HC2 S but with white housing and filter cap for outdoor use 83
24. al adapter cables AC3001 AC3002 or AC3005 see document E M HC2 accessories Procedure for adjusting the HC2 probe with the ROTRONIC HWA software e Connect the HC2 probe to the HW4 PC as explained in the HW4 manual E M HW4v3 Main e Start HW4 software on the PC and search for the HC2 probe HW4 Main Menu Bar gt Devices and Groups gt Search for USB masters or Search for RS232 masters or search for Ethernet masters depending on the connecting cable e After finding the HC2 probe with HW4 expand the device tree to see the HC2 probe functions and select Probe Adjustment e For further instructions see HW4 manual E M HW4v3 A2 001 8 3 Validation of the output signals transmission If so desired transmission of the HC2 probe output signals can be validated by using the probe simulator function The HW4 software is required to enable and configure this function When the function is enabled the probe generates digital and analog signals corresponding to values specified by the user 2009 2013 Rotronic AG E M HC2 Probes V1 26 Rotronic AG E M HC2 Probes V1 26 Bassersdorf Switzerland Document code Unit HygroClip 2 HC2 Humidity Temperature Instruction Manual Probes User Guide Document Type Page 250f31 Document title 9 Firmware updates Firmware updates will be available on the ROTRONIC website for downloading Firmware files are given a name that shows both to which device the file applies and the version
25. as HC2 IM1xx but with 430 mm barrel length 16 9 for through wall installation HC2 IM405 Weight with 2 m cable approx 540 g 19 0 oz 80 g 2 8 oz per additional meter HC2 IM502 Same as HC2 IM1xx but with 580 mm barrel length 22 8 for through wall installation HC2 IM505 Weight with 2 m cable approx 680 g 24 0 oz 80 g 2 8 oz per additional meter Humidity measuring range 0 100 RH Temperature limits at sensor 100 200 C 148 392 F Barrel diameter 15 mm 0 6 length 120 mm 4 7 See note below HC2 IM102 M Probe cable length 2 m 6 5 ft or 5 m 16 4 ft HC2 IM105 M Barrel stainless steel Filter base SP MSB15 Filter cartridge to be ordered separately Weight with 2 m cable approx 310 g 10 9 oz 80 g 2 8 oz per additional meter HC2 IM302 M Same as HC2 IM1xx but with 280 mm barrel length 11 0 for through wall installation HC2 IM305 M Weight with 2 m cable approx 450 g 15 9 oz 80 g 2 8 oz per additional meter HC2 IM402 M Same as HC2 IM1xx but with 430 mm barrel length 16 9 for through wall installation HC2 IM405 M Weight with 2 m cable approx 590 g 20 8 oz 80 g 2 8 oz per additional meter HC2 IM502 M Same as HC2 IM1xx but with 580 mm barrel length 22 8 for through wall installation HC2 IM505 M Weight with 2 m cable approx 730 g 25 7 oz 80 g 2 8 oz per additional meter 103 120 280 430 580 39 T i wo Note 1 HC2 IMxxx M probes are the sa
26. ccuracy specified for the HC2 probes is valid only when the probe is supplied with a voltage within the range of 3 3 5 VDC The probes are tested and adjusted at the factory using a supply voltage of 3 3 VDC When a voltage source of 3 3 5 VDC is not available the probe should be used together with a voltage adapter see separate document E M HC2 accessories so as to provide 3 3 5 VDC to the probe Use of a voltage adapter allows powering the probe from a voltage source of 5 to 24 VDC or 5 to 16 VAC During start up the typical current consumption of the probe is initially 8 mA during 2ms and 5 mA during the next 2s Without a power supply limiter the start up current may reach a maximum of 50 mA After start up the current consumption is on average less than 3 mA Randomly distributed current spikes of maximum 1 mA during 2us are normal during operation and are caused by the probe micro processor and associated components The HC2 probes are polarity protected by a keyed connector There is no electrical polarity protection 3 2 Measured parameters The HC2 probe measures relative humidity with a ROTRONIC Hygromer IN1 capacitive sensor and temperature with a Pt100 RTD 3 3 Calculated parameters Using the ROTRONIC HW4 software the HC2 probe can be configured by the user to calculate either the dew point or the frost point 3 4 Analog output signals The HC2 probe features two 0 1 V linear analog output signals The default factor
27. cument code E M HC2 Probes V1 26 Rotronic AG Bassersdorf Switzerland Unit Probes User Guide Document title HygroClip 2 HC2 Humidity Temperature Instruction Manual Document Type Page 27 of 31 Configurable analog outputs Output 1 Can be made to correspond to any parameter Factory default parameter Relative humidity Factory default scale 0 100 RH Output 2 Can be made to correspond to any parameter Factory default parameter Temperature Factory default scale 40 60 C Output 1 and Output 2 Signal type 0 1V User configurable scaling limits 999 99 9999 99 engineering units Offset at 0 V 3mV maximum Ripple 1 2 mV x 2us Short circuit tolerant Yes Internal resistance 100 Minimum external load 1000 O Deviation from digital signal 1 mV from 0 002 to 1 0 V 2 mV from 0 0 to 0 002 V Digital interface Interface type UART Universal Asynchronous Receiver Transmitter Organization Dialog duplex Baud rate 19200 Parity none Default configuration Data bits 8 Stop bits 1 Flow Control none Tolerance 3 96 Baud rate configuration No Logical levels Logical 0 lt 0 3V VDD Logical 1 gt 0 8V VDD Maximum cable length 5 m 16 4 ft w o signal booster Effect of VDD in the range 3 3 to 5 0 V see note below Temperature digit
28. e Used to specify a safe fixed value for humidity and for temperature in the event of a sensor failure Can be configured enabled or disabled 4 2 Factory default settings Note Configuration of the probe by the user and access to its functions requires a PC with the ROTRONIC HWA software version 2 1 1 or higher installed For connecting the HC2 probe to a PC use any of the following digital adapter cables AC3001 AC3002 or AC3005 see document E M HC2 accessories Unit system Metric or English Metric Psychrometric calculation None Output 1 parameter scale and unit Output 2 parameter scale and unit Humidity 0 100 RH Temperature 40 60 C Communication protocol RO ASCII RS 485 address 0 Device name Probe type 2009 2013 Rotronic AG E M HC2 Probes V1 26 Rotronic AG E M HC2 Probes V1 26 Bassersdorf Switzerland Document code Unit HygroClip 2 HC2 Humidity Temperature Instruction Manual Probes User Guide Document Type Page 17 of 31 Document title Functions Factory default Humidity temperature adjustment Enabling Disabling only by HWA user rights possible Device write protection Disabled Limit humidity output to 100 RH Enabled Out of limit value digital alarm Disabled Data recording Disabled Automatic humidity sensor test Disabled Humidity sensor drift compensation Disabled Fail safe mode Disabled
29. e accuracy of probes HC2 C04 and HC2 C05 11 Accessories and parts 12 Supporting documents 13 Document releases ete niei ie cete esce secede snatdedetecedsate de dead einge ca odes esccucetesedueedsfesevece 2009 2013 Rotronic AG E M HC2 Probes V1 26 E M HC2 Probes V1 26 ee Bassersdorf Switzerland Document code Unit HygroClip 2 HC2 Humidity Temperature Instruction Manual Probes User Guide Document Type Page 30f31 Document title Applicability This manual applies to all HC2 probes with firmware version 3 0 or higher Changes to the last digit of the version number reflect minor firmware changes that do not affect the manner in which the probe should be operated 1 Overview The HC2 series are digital humidity temperature probes based on the AirChip 3000 technology These probes feature a UART serial interface and two 0 1 V linear analog output signals The HC2 probes are designed for use with the HygroClip 2 generation of ROTRONIC humidity temperature instruments hand held and bench top indicators data loggers transmitters hygrostats etc The HC2 probes maintain all of the benefits of the original HygroClip technology such as the possibility of hot swapping probes and feature significant improvements in the area of measurement accuracy and functionality The HC2 probes can also be used as a stand alone device using either the analog output signals or the probe digital interface
30. ely see Models 2009 2013 Rotronic AG E M HC2 Probes V1 26 E M HC2 Probes V1 26 Document code Rotronic AG Bassersdorf Switzerland Unit HygroClip 2 HC2 Humidity Temperature Instruction Manual Probes User Guide Document title Document Type Page 15of 31 4 User configurable settings and functions The HC2 probe ships configured as per the factory defaults o Users who intend to use the probe as a stand alone analog device can use the probe as any conventional humidity and temperature probe A connecting cable with active electronics may be required to power the probe Most such users will never have to use the probe configurable settings and functions o Users who purchased a probe for use with another ROTRONIC instrument can also use the probe right away and do not necessarily have to use the probe configurable settings and functions o Users that intend to use the probe as a stand alone digital device typically need to use a connecting cable with active electronics and generally need to configure either the probe or the PC Making use of the probe configurable settings and functions is entirely up to the user and the appropriate settings depend on the user application We have provided below a short description of the probe functions and also indicated the factory default settings 4 1 Function overview MEASUREMENT ACCURACY AND RELIABILITY AirChip 3000 Functions Description
31. ents apply to any external device or circuit connected to the probe voltage outputs HC2 Voltage Output 0 1V gt 1kOhm In the situation where the external device uses an internal pull up resistor the value of this resistor should meet the requirements shown below It is also necessary to add a pull down resistor RL connected to ground in order to be able to read 100 of the range of the probe voltage output VCC 0 1V 3 3V 2 250 kOhm 1 kOhm R Pull up 0 1V 5 0V 2400 kOhm 1 kOhm HC2 Voltage Output RE 0 1V 10 0V 2 1MOhm 1 kOhm 2009 2013 Rotronic AG E M HC2 Probes V1 26 E M HC2 Probes V1 26 ee Bassersdorf Switzerland Document code Unit HygroClip 2 HC2 Humidity Temperature Instruction Manual Probes User Guide Document Type Page 22 of 31 Document title 7 3 Stand alone operation as a digital probe PC or network The HC2 probes can be connected to a PC or to an Ethernet network with one of the available digital interface adapters see Accessories Probe configuration and full access to all probe functions requires a PC with the ROTRONIC HWA software installed Starting with firmware version 1 3 the probes accept several communication protocols that allow users to read the measurement data without the HW4 software When using the standard RO ASCII protocol access to some of the probe functions is also possible without HW4 For details see document E M AC3000 CP
32. eseceedstececesieen Io SE aca RUE re uad 5 1 General guidelines for fixed installation 6 Electrical installation eere 6 1 General guidelines for fixed installation 0 2 Analog signal WifIDIg iiir eere tr eret deed sa ek EEE AEEA erras uar ne haya ERA een accented 6 3 Minimum analog output load ssssseeeneemeeennen enne 6 4 Digital signal wiring ssssssseeeeeeeneeenennnnnm nennen nnne 0 5 Grounding 3 oett miti eects tn tsp Guster eme es eor C rods cti rdc rao cup PE E E 7 1 Operation with an indicator data logger or transmitter ssseesssssse 7 2 Stand alone operation as an analog probe cccecccceeeneeeceeeeeeeeeeeeeaeeeeeeaeeeseeaeeeeeeeeesiaeeeeeeeeeseaaes 7 3 Stand alone operation as a digital probe PC or network sssssssssseseeeee 7 4 Connectivity examples for stand alone probes 7 5 Hand held probes used with an indicator WEM Maintenance LE 8 1 Cleaning or replacing the dust filter rennen enne nnne 8 2 Periodic calibration check sesssssessss 8 3 Validation of the output signals transmission 9 Firmware updates eeeeeeeeeeee enne 10 Technical data 10 1 Specifications 10 2 Dew point accuracy 10 3 Effect of cable temperature on th
33. fthe probe has a removable cartridge simply replace the cartridge leave the metal base on the probe as e fthe probe has a plastic slotted cap with a built in filter element follow these instructions 1 Unscrew the filter from the probe and pull it straight away in the alignment of the probe so as not the catch the humidity and temperature sensors 2 Before putting on a new dust filter check the alignment of both sensors with the probe The wires that connect the sensors to the probe are very thin and bend easily If necessary correct the alignment by tapping the sensor very gently with a smooth object such as a small plastic rod Do not use sharp pliers or tweezers as this could puncture the sensor and do not pull hard on the sensor 8 2 Periodic calibration check Both the Pt 100 RTD temperature sensor and associated electronics are very stable and should not require any calibration after the initial factory adjustment Long term stability of the ROTRONIC Hygromer humidity sensor is typically better than 1 RH per year For maximum accuracy calibration of the probe should be verified every 6 to 12 months Applications where the probe is exposed to contaminants may require more frequent verifications Calibration and adjustment of the HC2 probe can be done with either a PC with the HWA software installed version 2 1 0 or higher or with the HP23 hand held calibrator For connecting the HC2 probe to a PC use any of the following digit
34. l is limited to reading measurement data from the HC2 probe Functions such as device configuration humidity and temperature adjustment etc are not supported The Custom protocol is applicable to all AirChip 3000 devices with a digital interface and allows RS 485 networking o 12C The I2C protocol available with the HC2 probe does not allow the networking of devices and is limited to a one way communication where the HC2 probe automatically sends data during each refresh interval to an external device with I2C input When using either the RO ASCII or the Custom protocol the HC2 probe can be set to send data automatically after each refresh cycle without requiring a data request When this mode is enabled the receiving device must be listening at all times in order to get the measurement data For details see document E M AC3000 CP 2009 2013 Rotronic AG E M HC2 Probes V1 26 Document code E M HC2 Probes V1 26 Rotronic AG Bassersdorf Switzerland Unit Document title HygroClip 2 HC2 Humidity Temperature Probes User Guide Instruction Manual Document Type Page 140f31 3 6 Connector All standard probe models of the HC2 series use the same keyed connector male The connector is located either directly on the probe body or at the end of a cable The probe connector is secured to the matching female connector with a threaded collar Pin out diagram 3 7 Probe connector 7 pin male
35. l wiring Use one of the available connecting cables see Accessories to connect the UART digital interface of the HC2 probe to other devices Without a signal booster the maximum cable length should not exceed 5 m 16 ft 6 5 Grounding In the case of a fixed installation ground the HC2 probe especially if the electronics will be subjected to a low humidity environment 35 RH or less The power supply and digital ground GND and the analog ground AGND should be tied separately to a proper ground so as to avoid spikes in the analog signals 7 Operation 7 1 Operation with an indicator data logger or transmitter The HC2 probes are compatible with a large number of indicators data loggers and transmitters from ROTRONIC Operating instructions are provided in each device manual 7 2 Stand alone operation as an analog probe The HC2 probes can be used as a conventional analog probe See Accessories supply voltage adapters connectors and cables Use the HWA software to configure the probe as desired complete the mechanical and electrical installation and power up the probe 2009 2013 Rotronic AG E M HC2 Probes V1 26 Rotronic AG E M HC2 Probes V1 _26 Bassersdorf Switzerland Document code Unit HygroClip 2 HC2 Humidity Temperature Instruction Manual Probes User Guide Document Type Page 21 of 31 Document title 7 2 1 Minimum load requirements for the probe voltage outputs The following requirem
36. m blade length 16 5 Weight approx 300 g 10 6 oz 280 420 P TREE EE Measurement of product samples liquids pastes powders granules or chunks Handheld probe for use with indicators and data loggers Humidity measuring range 0 100 RH Temperature limits at sensor 40 85 C 40 185 F HC2 AW Barrel aluminum top stainless steel bottom Probe cable length 0 95 m 37 5 Weight approx 541 g 1 Ib 3 1 oz 068 Use together with WP14 or WP 40 sample cup holder 60 Prior to use verify the integrity and cleanliness of the sealing O ring located under the probe Qo Q7 Power Indicator red LED Power ON OFF push button Note When using the HC2 AW probe check that the red LED on top of the probe is lit This indicates that the probe is being powered If necessary power the probe by pressing once on the red button located on top of the probe When the red LED is not lit the probe is not powered and the instrument is not receiving a signal from the probe 2009 2013 Rotronic AG E M HC2 Probes V1 26 Rotronic AG E M HC2 Probes V1 26 Bassersdorf Switzerland Document code Unit HygroClip 2 HC2 Humidity Temperature Instruction Manual Probes User Guide Document Type Page 9of 31 Document title Process measurement fixed installation For use with transmitters and data loggers Humidity measuring range 0 100 R
37. me as HC2 IMxxx but are equipped with a stainless steel connector instead of PPS Note 2 HC2 IM1 120 mm barrel length to avoid measurement errors due to temperature gradients fully immerse the probe barrel in the environment to be measured 2009 2013 Rotronic AG E M HC2 Probes V1_26 Rotronic AG E M H C2 Probes V1 _26 Bassersdorf Switzerland Document code Unit HygroClip 2 HC2 Humidity Temperature Instruction Manual Probes User Guide Document Type Page 11 of 31 Document title Measurement in compressed air conduits and vessels fixed installation For use with transmitters and data loggers Humidity measuring range 0 100 RH Temperature limits at sensor 100 200 C 148 392 F G 77 thread for maximum 100 bar 1450 PSI HC2 IE102 Probe cable length 2 m 6 5 ft or 5 m 16 4 ft HC2 IE105 Barrel stainless steel Filter base SP MSB15 Filter cartridge to be ordered separately Weight with 2 m cable approx 290 g 10 2 oz 80 g 2 8 oz per additional meter Humidity measuring range 0 100 RH Temperature limits at sensor 100 200 C 148 392 F NPT 77 thread for maximum 100 bar 1450 PSI Probe cable length 2 m 6 5 ft or 5 m 16 4 ft Barrel stainless steel Filter base SP MSB15 Filter cartridge to be ordered separately see Accessories Weight with 2 m cable approx 290 g 10 2 oz 80 g 2 8 oz per additional meter HC2 IE302 HC2
38. n AirChip 3000 Devices E M AC3000 CP AirChip 3000 Communication Protocol Configuration procedures for ROTRONIC devices with Ethernet TCP IP interface E M CalBasics Temperature and humidity adjustment basics Instructions for using the ROTRONIC humidity standards E T HumiDefs Humidity Definitions Note All document file names have an extension corresponding to the document release number example of a first release E M HW4v2 Main_10 This extension is not shown in the above table E M TCPIP Conf 13 Document releases Doc Release Date Notes _20 Apr 11 2009 Original release Added probe model HC2 AW zen Aug 19 2009 Corrected the specification of some of the probe materials _22 Jun 18 2010 Updated document to HW4 software v 3 23 May 20 2011 Modified dimensional specifications of the HC2 C04 probe _24 Jan 6 2012 Changed the factory default for data recording to disabled Page 10 reduced maximum pressure to 100 bar 1450 PSI for 25 May 40 2013 the HC2 IE102 105 and HC2 IE302 305 Changes for HygroClip2 with firmware v3 0 Power supply range changed to 3 3 5 VDC HC2 IE maximum pressure range changed to 100 bar Added HC2 SM Added HC2 IMxxx M Added HC2 IExxx M Nov 2013 2009 2013 Rotronic AG E M HC2 Probes V1 26 Rotronic AG E M HC2 Probes V1 26 Bassersdorf Switzerland Document code Unit HygroClip 2 HC2 Humidity Temperature Instruction Manual Probes User Guide Docume
39. n powered up again o The recorded data can be downloaded to a PC with the HWA software time stamped and viewed 2009 2013 Rotronic AG E M HC2 Probes V1 26 E M HC2 Probes V1 26 Document code Rotronic AG Bassersdorf Switzerland Unit Probes User Guide Document title HygroClip 2 HC2 Humidity Temperature Instruction Manual Document Type Page 16 of 31 AirChip 3000 Functions Description gt Simulator mode Used to make the probe generate fixed values for the humidity temperature and calculated parameter Can be configured enabled or disabled AirChip 3000 Functions Description gt Device write protection Used to protect the probe with a password to prevent unauthorized digital access by a digital user Can be configured enabled or disabled AirChip 3000 Functions Description gt Limit humidity output to 100 RH Used to prevent the humidity signal from exceeding 100 96RH when condensation forms on the sensor Can be enabled or disabled gt Out of limit value alarm Used to specify the normal range for humidity temperature and the calculated parameter depending on the user application Can be configured enabled or disabled Out of limit values trigger a digital alarm gt Bad sensor alarm Built in function Cannot be disabled A bad humidity or temperature sensor triggers a digital alarm gt Fail safe mod
40. nt Type Page 310f31 Document title 2009 2013 Rotronic AG E M HC2 Probes V1 26
41. y settings are as follows Output 1 0 1 V humidity 7 0 100 RH Output 2 0 1 V temperature 40 60 C Using the ROTRONIC HWA software any output signal can be made to correspond one of the following e Relative humidity e Temperature e Dew or frost point The scale of each analog output can be set within the numerical limits of 999 99 and 9999 99 If so desired any output can also be disabled no signal The D A converters used to generate the analog output signals feature a 16 bit resolution The 0 1 V analog output signals exhibit a small positive offset of 3 mV or less at 0 V Minimum load requirements apply to the external device or circuit connected to the probe voltage outputs These requirements are defined in the Operation chapter Note users who require an analog signal other than 0 1 V should either contact ROTRONIC or connect the probe to one of the available transmitters 2009 2013 Rotronic AG E M HC2 Probes V1_26 Rotronic AG E M HC2 Probes V1 26 Bassersdorf Switzerland Document code Unit HygroClip 2 HC2 Humidity Temperature Instruction Manual Probes User Guide Document Type Page 130f31 Document title 3 5 Digital interface The HC2 probe features a UART interface Universal Asynchronous Receiver Transmitter that allows two way communication with the probe For connecting the HC2 probe to a PC use any of the following digital adapter cables AC3001 AC3002 or
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