1535 Relative Humidity Transmitter - Novatech Controls

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!1.15 OTHER INPUTS–<strong>Humidity</strong>, Ambient Temperature and Drier TemperatureThe connection of a Lee Integer CH15 or similar sensor/transmitter with a range of 0–100 % RH and output of 0–1volt is optional for dryers with indirect heating. In this case the probe reference gas comes from the ambientatmosphere, and compensating for RH and temperature variations of this reference gas improves the accuracy by 1%RH.Dryers with direct fired combustion processes normally use a sample of atmosphere from within the drier as probereference gas and do not require an RH or ambient air temperature sensor. In this case, the reference gas must bedried to remove all water vapour before entering the probe reference port.If the drier has a fixed combustion system (fixed firing rate), where the reduction of oxygen due to combustion isconstant, then an ambient/water cooled drier may not be necessary to condition reference gas from within the drier.The accuracy of the transmitter is further improved if the combustion gas is a small percentage of the recirculatingdrier air. In this case the CH15 sensor can optionally be installed for a 1 % RH improvement in accuracyIn order to calculate the % RH of the drier, the temperature of the drier gas must be known. A K type thermocoupleis used for this purpose. This thermocouple is not necessary if the transmitter is set to display % Water Vapour, g/Kgor dew point temperature only.1.16 WATCHDOG TIMERThe watchdog timer is started if the microprocessor fails to pulse it within any three second period, (ie. fails to run itsnormal program).The microprocessor will then be repeatedly reset until normal operation is resumed. Reset cycles are displayed by thereset light on the internal keyboard. A steady ‘ON’ light indicates normal operation.If the program has not resumed normal operation after three attempts to reset, the common alarm relay will beactivated.1.17 BACK-UP BATTERYThe transmitter’s RAM and real-time clock are backed up by a lithium battery in the event of power failure. All setupand maintenance variables are saved and the clock is kept running for approximately ten years with the power off.The average life of the battery with the power on is 38 years.Page 16NOVATECH HUMIDITY TRANSMITTER
!INSTALLATION &2COMMISSIONINGSECTIONNUMBERINSTALLATION2.1 MOUNTING THE TRANSMITTER2.2 HEATER INTERLOCK RELAY2.3 EARTH, SHIELD & POWER CONNECTIONS2.4 CONNECTING THE PROBE CABLE2.5 CONNECTING THE RELATIVE HUMIDITY INPUT (OPTIONAL)2.6 CONNECTING THE AMBIENT TEMPERATURE INPUT (OPTIONAL)2.7 CONNECTING THE OUTPUT2.8 CONNECTING THE ALARMS2.9 CONNECTING THE HORN RELAY2.10 CONNECTING THE AUTOMATIC PURGE & CALIBRATION SYSTEM2.11 CONNECTING REFERENCE GAS2.12 CONNECTING THE PRINTER AND TERMINAL PORTS2.13 INSTALLING THE OXYGEN PROBECOMMISSIONING2.14 CONNECTING POWER - COLD START2.15 REFERENCE GAS FLOW SWITCH2.16 COMMISSIONING - MAINTENANCE MODE2.17 COMMISSIONING - SET UP MODE2.18 RUN MODE2.19 HEATER BY-PASS SWITCH2.20 CHECKING THE ALARMS2.21 PROBE CALIBRATION2.22 FILTER PURGE SET UP PROCEDURE2.23 CALIBRATION GAS SET UP PROCEDURE2.24 DUST IN THE FLUE GAS2.25 STRATIFICATIONNOVATECH HUMIDITY TRANSMITTER Page 17
Page 3 and 4: !USING THIS MANUALThe Novatech 1535
Page 5 and 6: !NOVATECH 1535 HIGH TEMPERATURE,PER
Page 7 and 8: !Heater VoltageHead TemperatureRefe
Page 9 and 10: !1.3 PURGE/CALIBRATION PANELSDue to
Page 11 and 12: !1.6 REFERENCE GAS DRIERA cooler is
Page 13 and 14: !FLOWSWITCHSOLENOIDVALVE(NOTE 4)PUM
Page 15: !1.12 AUTO CALIBRATION CHECKING-PRO
Page 19 and 20: !Figure 2.2 Probe Heater Safety Int
Page 21 and 22: !2.4 CONNECTING THE PROBE CABLEConn
Page 23 and 24: !2.6 CONNECTING THE REFERENCE GAS (
Page 25 and 26: !2.8 CONNECTING THE ALARMSThe alarm
Page 27 and 28: !2.11 CONNECTING REFERENCE GASA ref
Page 29 and 30: !2.15 REFERENCE GAS FLOW SWITCHEnsu
Page 31 and 32: !2.24 DUST IN THE DRIERThe preferre
Page 33 and 34: !OPERATOR FUNCTIONS (RUN MODE)3.1 D
Page 35 and 36: !3.3.2 SUMMARY OF ALARM RELAYSALARM
Page 37 and 38: !SET-UP MODE SUMMARY4.1 SET-UP MODE
Page 39 and 40: !4. DRIER HEATING Options:TYPE1. In
Page 41 and 42: !13. TIME BETWEEN Set the time betw
Page 43 and 44: !25. PRINTER BAUD RATE Select the c
Page 45 and 46: !TRANSMITTER MAINTENANCE5.1 MAINTEN
Page 47 and 48: !10. SET PROBE A new EMF offset mus
Page 49 and 50: !5.7 BACK-UP BATTERY REPLACEMENTThe
Page 51 and 52: !If the probe tests reveal less tha
Page 53 and 54: !APPENDICES1. PROBE EMF TABLES2. CI
Page 55 and 56: !MILLIVOLT TABLE WITH AIR REFERENCE

1535 Relative Humidity Transmitter - Novatech Controls

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