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SERIES 2500

BENCHTOP TWO-PRESSURE

HUMIDITY GENERATOR

OPERATION AND

MAINTENANCE MANUAL

THUNDER SCIENTIFIC CORPORATION

623 WYOMING BLVD. SE

ALBUQUERQUE, NEW MEXICO 87123-3198

www.thunderscientific.com

Printed 2017

Tel: 505.265.8701



FAX: 505.266.6203

e-mail: [email protected]

Document Edition 18



October 2017

Firmware Version 2.14

THUNDER SCIENTIFIC

® is the registered trademark of Thunder Scientific Corporation.

All the information provided in this document is correct and true at the time of publication.

Thunder Scientific Corporation reserves the right to change any technical data without notice.

MADE IN USA

Summary of Contents for 2500 series

Page 1: ...OPERATION AND MAINTENANCE MANUAL BENCHTOP TWO PRESSURE HUMIDITY GENERATOR SERIES 2500...

Page 2: ...rinted 2017 Tel 505 265 8701 FAX 505 266 6203 e mail support thunderscientific com Document Edition 18 October 2017 Firmware Version 2 14 THUNDER SCIENTIFIC is the registered trademark of Thunder Scie...

Page 3: ...Model 2500 Two Pressure Two Temperature Humidity Generator...

Page 4: ...1 10 1 5 1 AC Power Distribution 1 10 1 5 2 Power Supply 24 VAC 1 10 1 5 3 Power Supply STD PS 1 10 1 5 4 Analog Inputs STD A D 1 11 1 5 4 1 Temperature Measurement 1 11 1 5 4 2 Mass Flow Transducer T...

Page 5: ...PARATION 2 2 2 3 1 Chamber Fluid Filling 2 2 2 3 1 1 Chamber Fluid Filling Procedure 2 2 2 3 2 Positioning and Connections 2 3 2 3 2 1 Pneumatic Cart 2 3 2 3 2 2 Bench Space 2 4 2 3 2 3 Power 2 4 2 3...

Page 6: ...on 4 2 4 2 2 1 Temperature Calibration Procedure 4 3 4 2 3 Pressure Transducer Calibration 4 7 4 2 3 1 Pressure Calibration Procedure 4 7 4 2 4 Flow Transducer Calibration 4 11 4 2 4 1 Flow Calibratio...

Page 7: ...on 91D25904 Electrical Sub Panel Layout 91D25905 Terminal Layout 91S25906 AC DC Power 91S25907 Solid State Relay Module Board 91S25908 Compressor Heater Schematic 91S25909 Liquid Level Speaker Schemat...

Page 8: ...e defective This warranty shall not apply to any Product which has been maintained handled stored repaired or altered in any manner or by anyone other than an authorized TSC representative so as to af...

Page 9: ...ntenance Manual 3 HumiCalc with Uncertainty Software 4 2500 ControLog Software 5 Chamber Insulation Foam 6 Chamber Port Foam Plug 7 Power Cable 8 Torx Driver with Screws 9 Reservoir Fluid Funnel 10 Ch...

Page 10: ...the equipment types in the WEEE Directive Annex I this product is classed as category 9 Monitoring and Control Instrumentation product Do not dispose in domestic household waste To return unwanted pr...

Page 11: ...ricante atrav s do Website constante do produto ou contacte o seu representante de vendas ou distribuidor local Portugu s Dit product voldoet aan de merktekenvereisten van de AEEA richtlijn 2002 96 EG...

Page 12: ...eneral Description Operation of the 2500 humidity generator is based on the two pressure method of producing known atmospheres of relative humidity and assumes that the water vapor pressure remains a...

Page 13: ...temperature T and Xw the mole fraction of water vapor which would exist in a sample of air if it were saturated with water vapor at the same pressure P and temperature T as the unsaturated sample Xv T...

Page 14: ...e mole fraction Xv the expression would be Xv Pv Pc which would require direct measurement of the water vapor content However this requirement is eliminated by using the relationship ew Ts Ps Pv Pc wh...

Page 15: ...Air Air a mixture of gases with varying compressibilities exhibits non ideal properties which affect the saturation vapor pressure ew T The saturation vapor pressures ew Ts and ew Tc in the relative h...

Page 16: ...ee of saturation is a temperature correction ratio which accounts for super saturation and under saturation of the gas in the saturator at temperature Ts with respect to the chamber temperature Tc due...

Page 17: ...w relative humidities i e 5 where the pressures Pc and Ps differ greatly i e Ps 20 Pc the enhancement factor ratio may exceed 1 06 affecting relative humidity calculations by 0 3 or more A formula for...

Page 18: ...33 838 mm W x 20 508 mm D 2500ST 23 25 591 mm H x 36 914 mm W x 23 584 mm D Physical Dimensions with cart 2500 53 5 1 36 m H x 40 1 02 m W x 23 584 mm D 2500ST 56 5 1 44 m H x 43 1 09 m W x 26 660 mm...

Page 19: ...hat has been input either via keypad input or from external computer input thru the RS 232C port The Computer Control System knows nothing of past or future setpoints requiring the use of an external...

Page 20: ...inversion circuit which converts 5 VDC input to a 21 VDC output required by the LCD module Contrast adjustment is controlled via a 0 to 5 VDC analog output from the STD CPU The variable voltage is fed...

Page 21: ...ing power to the STD bus computer system as well as the flow transducer pressure transducers solid state relay board SSRB terminal interface board TIB stepper motor drives SMD 1 SMD 2 the liquid lever...

Page 22: ...ature measurement electronics of the STD A D circuitry Deviations from the reference resistor s nominal value are used to mathematically offset the measured values of the four thermistor probes 1 5 4...

Page 23: ...side of SSR5 on the Solid State Relay Board SSRB Valve actuation voltage is 24 VAC 1 5 5 2 Refrigerant Solenoid Valve SOL2 Reference Drawing 91S25907 The Refrigerant Solenoid Valve when activated allo...

Page 24: ...tch HLS1 must be in the normally closed position indicating that the presaturation temperature is within allowable limits below 95 C Activation is then accomplished by applying a low from TIB channel...

Page 25: ...1S25911 The Expansion Valve is used to control saturation pressure and is driven indirectly via pulses from the Terminal Interface Board TIB channels B0 B2 which trigger stepper motor driver SMD 2 Pul...

Page 26: ...pplying a low from the STD CPU monitored at TIB terminal C2 to the optical input side of SSR2 on the Solid State Relay Board SSRB If the presaturator does not fill to the control point i e reservoir e...

Page 27: ...ned at a temperature approximately 15 to 20 C warmer than the saturation temperature so as to humidify the airstream to a water vapor content greater than saturation The presaturated air then exits th...

Page 28: ...s through the saturator Excess water vapor is condensed from the airstream as it establishes equilibrium with the heat transfer fluid ensuring that the airstream has a value of 100 relative humidity a...

Page 29: ...values Hours per gallon 0 C 20 L min 68000 RH Hours per gallon 25 C 20 L min 14000 RH Hours per gallon 50 C 20 L min 3500 RH Hours per gallon 70 C 20 L min 1200 RH Using lower flow rates will increase...

Page 30: ...outlet to the saturation temperature control sensor RTD0 From this point the fluid circuit splits one path flowing through the test chamber fluid shell and the other path flowing through the saturator...

Page 31: ...enoid valve SOL2 Primary power to the refrigerant solenoid valve is switched by a solid state relay SSR0 Pulsed power to the refrigerant valve is controlled by the computer using feedback from the flu...

Page 32: ...Allow an additional 20 508mm in width for clearance if possible so as to allow complete opening of the chamber door and access to the test port Figure 2 1 2 2 2 Power The 2500 humidity generator requ...

Page 33: ...rature conditioning of the 2500 test chamber utilizes a 60 70 mixture of propylene glycol and 30 40 water as the heat transfer fluid This fluid is circulated by a magnetically coupled centrifugal pump...

Page 34: ...let STANDARD COMPRESSOR Remove the air compressor shipping strap For operation place the air compressor on the floor and connect the 25 foot 7 62m air supply hose between the air compressor outlet and...

Page 35: ...at the rear of the console for the exhaust fan Allow as much space as possible on the right side so as to allow clearance for utilizing the chamber access port and to allow for opening of the chamber...

Page 36: ...onsole working pressure is 175 PSIG If the generator is installed on the pneumatic cart but an alternate air supply facility is desired connect the alternate air supply 175 PSIG MAWP to the air inlet...

Page 37: ...s test 3 2 2 Control Display Screen At the end of the power up sequence the following Control Display Screen appears All control and measurement parameters critical to the operation of the humidity ge...

Page 38: ...ost accurate calculation of RH at the point in the immediate vicinity of the chamber temperature probe Placing the chamber temperature probe at the humidity sensing point of devices under test gives t...

Page 39: ...m This parameter is used when performing tests on flow sensitive humidity measurement devices such as aspirated psychrometers chilled mirrors etc 3 2 2 1 Changing the Display Contrast To increase the...

Page 40: ...he system is in F Note To enter a negative temperature on systems equipped with this option press the left arrow key until the negative sign appears then enter the desired temperature E Find the aster...

Page 41: ...tor has the ability to control the humidity in one of three possible modes Mode 1 RH Pc is held constant even under varying conditions of saturation and chamber temperature The saturation pressure tra...

Page 42: ...ol mode parameters that control mode becomes active If the cursor is on a non control mode parameter i e FLOW xxx SATUR X etc the current control mode remains in effect An altered setpoint for a non a...

Page 43: ...3 to change default time and other print parameters The PRNT ON key when pressed toggles to PRNT OFF disables printer output and sends a form feed command to the printer The key when pressed immediate...

Page 44: ...generator holds approximately one gallon of distilled water which can last from 12 hours to over 9 months of continuous use depending on the temperature and humidity at which it is operated reference...

Page 45: ...ts Probe and Transducer Averaging Serial Port Baud Rates Parity etc Print Interval and Lines Per Page Time and Date 3 3 1 Edit Mode The EDIT mode is used for the viewing and editing process 1 From the...

Page 46: ...displayed Using E arrow keys and the numeric keys as necessary change any or all displayed values as desired Then press ENTER 6 After Editing or Viewing press DONE Then from the next menu press DONE a...

Page 47: ...ied with the formula New Value Previous Value AVG New Reading AVG 1 An AVG of zero 0 effectively eliminates averaging An AVG which is very large has a correspondingly large averaging affect Non intege...

Page 48: ...icients are automatically computed during pressure calibration section 4 2 3 AVG is the amount of averaging applied to the displayed value Averaging is applied with the formula New Value Previous Valu...

Page 49: ...of zero 0 effectively eliminates averaging An AVG which is very large has a correspondingly large averaging affect Non integer averaging amounts are allowable however negative amounts should never be...

Page 50: ...SCII value for a Carriage Return Cancel The ASCII value of the desired cancel the line character Sending this character clears anything in the input buffer of the Console Port Here 3 is the ASCII valu...

Page 51: ...Stop 1 or 2 stop bits Parity 0 for NO parity 1 for ODD parity or 2 for EVEN parity Intrvl The print interval or number of seconds between printouts of system data Lns Pg Lines per Page of printed dat...

Page 52: ...0 70 C and stability of 0 01 C or better Less stable baths may require the use of a thermal block B Standard or reference thermometer PRT or Thermistor for the range of 0 70 C with a resolution of 0...

Page 53: ...ach transducer 4 2 1 A D Board STD A D Equipment Required None All calibration errors appearing in the A D board will be accounted for automatically during calibration of the temperature pressure and...

Page 54: ...ose at bottom rear of console Remove cap and drain the chamber fluid Be sure to save fluid for refilling Using the 7 16 wrench remove the saturation temperature probe C Using the 7 16 wrench remove th...

Page 55: ...10 Using MARK CLR and the down arrow key as necessary mark the probes to be calibrated A marked probe is indicated with an asterisk on the left Note that the Refer Tmp cannot be marked and is display...

Page 56: ...marked probes are automatically saved to memory for future computation of calibration coefficients Note If a mistake was made during the temperature entry mode use OOPS rather than ENTER This will ca...

Page 57: ...COEF key if a printout of the coefficients is desired 17 To update the calibration with new coefficients press the SAVE QUIT key To abort without storing these new coefficients press the EXIT QUIT key...

Page 58: ...pen end wrenches 6 10 Torx driver 7 Flat blade screw driver 4 2 3 1 Pressure Calibration Procedure 1 Switch console power OFF 2 Turn OFF or disconnect air supply CAUTION ALL SYSTEM PRESSURE MUST BE VE...

Page 59: ...the transducer to be calibrated A marked transducer is indicated with an asterisk in the left most display column Since the two transducers require different calibration ranges the computer will only...

Page 60: ...all values unchanged 13 Apply the mid range pressure and watch the displayed value Once stable press the MID PRES key and enter the reference pressure Then press ENTER 14 Apply the upper recommended p...

Page 61: ...19 At the calibration menu press DONE Then press DONE at the next menu The system reinitializes and the Control Display screen appears 20 Repeat steps 9 thru 19 for the second pressure transducer 21 S...

Page 62: ...n for the temperatures and pressures and does not require the removal of the flowmeter from the system 1 Using appropriate fittings connect a flowmeter reference instrument to the chamber inlet port o...

Page 63: ...dating 9 Allow a few moments for stability of the flow indication This no flow condition will be used for a LOW flow reference Press LOW FLOW to store this point Then press ENTER Count SLPM Mass Flow...

Page 64: ...n step 3 calculate the following 20 Reference Indication 2500 Indication Press HIGH FLOW and enter this calculated value 12 Press CALC COEF to calculate the new flowmeter coefficients Count SLPM Mass...

Page 65: ...print the report 1 From the Control Display screen press EDIT CAL or from the Cal menu press DONE Both actions should bring up the Edit Cal menu 2 Ensure the printer is on then press PRNT REPT The Ca...

Page 66: ...Delete this From the File Page Setup menu set all four margins to one 1 inch Print the data from within WordPad 3 Press DONE to return to the Control Display screen Note System data may also be logge...

Page 67: ...mber Temperature 0 00000E 00 1 00000E 02 0 00000E 00 MM DD YY Temp Reference Resistor 2 50000E 01 1 00000E 02 0 00000E 00 MM DD YY ______ ______ ______ ______ ______ Pressure Zero Span Linearity Cal D...

Page 68: ...the Swagelok nut assembly in close proximity to the Pre saturator drain cap 8 Remove the Pre saturator cap and quickly place a finger over the open fitting to stop water flow then quickly remove your...

Page 69: ...bable to have multiple errors occurring at one time Under these circumstances the error codes simply add together algebraically and all of the associated messages are displayed in turn Any error code...

Page 70: ...gh Low limit 1024 Presaturation Temperature High Low limit 2048 Expansion Valve Temperature High Low limit 4096 Chamber Temperature High Low limit 8192 Temperature Reference High Low limit 16384 Tempe...

Page 71: ...due either to an empty reservoir or a malfunctioning filling system Error 32 Low Pressure Underrange The low range pressure transducer indicates a pressure below 10 PSIA or equivalent in other pressur...

Page 72: ...68 Temperature Overrange the presaturator temperature is above 100 C 212 F The most likely cause is misalignment or malfunction of the temperature probe Error 2048 Expansion Valve Temperature High Low...

Page 73: ...faulty reference resistor or malfunctioning STD A D converter board Error 16384 Cabinet Temperature Overrange The measured cabinet temperature is too high Most likely causes include a blocked or clog...

Page 74: ...s above 90 C 194 F Suspect misalignment or malfunction of the saturation temperature probe Error 32768 Temperature Overrange This error never occurs alone It may only occur in combination with tempera...

Page 75: ...1 1 Fluid Pump 230V 50 60Hz TE3MDHC230 FP1 1 Motor for 3MDHC 220V 50Hz ST977899 FP1 1 Pump Head for 3 MD HC ST581697 FP1 1 Fluid Pump 230V 60Hz ST3MDHC230 60 FS1 1 Fuse 4 Amp 250V Slow Blow WK4062BK F...

Page 76: ...lenoid Refrigeration A2014S50 SOL3 1 Valve Solenoid Bleed A2231 SOL4 1 Valve Solenoid Sat Fill A2037 SOL5 1 Valve Solenoid Pressure Select B3331 SPKR 1 Minilert Audio Signal MINLRT SSR0 7 8 SSR 5VDC L...

Page 77: ...QD0 G1 1 Gauge 200 PSI 1 4 NPT Pressure G2A148 MQC 1 Connector Male Quick B2 K16 REG 1 Regulator Pressure R73G2AKRSN RV1 1 Valve 200 PSIG 1 4 MPT Relief G5A710 5 3 AIR BOX ELECTRICAL Find Qty Descript...

Page 78: ...Contained Within is Proprietary to Thunder Scientific and cannot be Copied or Reproduced without Written Permission DWN REVISIONS REV DATE APPROVED 1 OF 1 DWF D 08 08 26 Changed drawing number from 91...

Page 79: ...tion Contained Within is Proprietary to Thunder Scientific and cannot be Copied or Reproduced without Written Permission DWN REVISIONS REV DESCRIPTION DATE APPROVED 1 OF 1 DWF C 09 02 03 Changed drawi...

Page 80: ...PTION DATE APPROVED DWF D Added Card Cage Callout Drawn to SW 7 1 2013 SHEET 1 OF 1 DWG NO A DRAWN APPLICATION USED ON NEXT ASSY SIZE CHECKED ISSUED TOLERANCES XX 010 50 Thunder Scientific Corporation...

Page 81: ...to SW 6 27 2013 SHEET 1 OF 1 DWG NO A DRAWN APPLICATION USED ON NEXT ASSY SIZE CHECKED ISSUED TOLERANCES XX 010 50 Thunder Scientific Corporation 623 Wyoming S E Albuquerque NM 87123 THIS DRAWING AND...

Page 82: ...IPTION DATE APPROVED DWF H Drawn to SW 7 25 2014 SHEET 1 OF 1 DWG NO A DRAWN APPLICATION USED ON NEXT ASSY SIZE CHECKED ISSUED TOLERANCES XXX 010 50 Thunder Scientific Corporation 623 Wyoming S E Albu...

Page 83: ...ASSIS LOW VOLTAGE CONFIGURATION HIGH VOLTAGE CONFIGURATION 2 PLF1 TB1 1 TB1 2 REVISIONS DWN REV DESCRIPTION DATE APPROVED DWF F Drawn to SW 7 25 2014 SHEET 1 OF 1 DWG NO A DRAWN APPLICATION USED ON NE...

Page 84: ...APPROVED DWF D Drawn to SW 7 25 2014 DWF E All Relays AC Revised Terminal Notations 1 4 2016 SHEET 1 OF 1 DWG NO A DRAWN APPLICATION USED ON NEXT ASSY SIZE CHECKED ISSUED TOLERANCES XXX 010 50 Thunde...

Page 85: ...D Drawn to SW 7 28 2014 SHEET 1 OF 1 DWG NO A DRAWN APPLICATION USED ON NEXT ASSY SIZE CHECKED ISSUED TOLERANCES XXX 010 50 Thunder Scientific Corporation 623 Wyoming S E Albuquerque NM 87123 THIS DR...

Page 86: ...N USED ON NEXT ASSY SIZE CHECKED ISSUED TOLERANCES XXX 010 50 Thunder Scientific Corporation 623 Wyoming S E Albuquerque NM 87123 THIS DRAWING AND INFORMATION CONTAINED WITHIN IS PROPRIETARY TO THUNDE...

Page 87: ...l Notations 1 4 2016 SHEET 1 OF 1 DWG NO A DRAWN APPLICATION USED ON NEXT ASSY SIZE CHECKED ISSUED TOLERANCES XXX 010 50 Thunder Scientific Corporation 623 Wyoming S E Albuquerque NM 87123 THIS DRAWIN...

Page 88: ...l Notations 1 4 2016 SHEET 1 OF 1 DWG NO A DRAWN APPLICATION USED ON NEXT ASSY SIZE CHECKED ISSUED TOLERANCES XXX 010 50 Thunder Scientific Corporation 623 Wyoming S E Albuquerque NM 87123 THIS DRAWIN...

Page 89: ...ANGE HIGH RANGE FLOW REVISIONS DWN REV DESCRIPTION DATE APPROVED DWF D Drawn to SW 7 28 2014 SHEET 1 OF 1 DWG NO A DRAWN APPLICATION USED ON NEXT ASSY SIZE CHECKED ISSUED TOLERANCES XXX 010 50 Thunder...

Page 90: ...DATE APPROVED DWF C Drawn to SW 7 28 2014 SHEET 1 OF 1 DWG NO A DRAWN APPLICATION USED ON NEXT ASSY SIZE CHECKED ISSUED TOLERANCES XXX 010 50 Thunder Scientific Corporation 623 Wyoming S E Albuquerqu...

Page 91: ...APPLICATION USED ON NEXT ASSY SIZE CHECKED ISSUED TOLERANCES XXX 010 50 Thunder Scientific Corporation 623 Wyoming S E Albuquerque NM 87123 THIS DRAWING AND INFORMATION CONTAINED WITHIN IS PROPRIETAR...

Page 92: ...THE CONSOLE PORT USE CONSOLE CABLE PART CCABLE OR 9 PIN EXTENDER CABLE CONNECTION TO ANY OLDER COMPUTER MAY REQUIRE AN ADAPTER CABLE OR CONNECTOR NOT PROVIDED TO CONNECT A MODEM TO THE CONSOLE PORT U...

Page 93: ...ICATION USED ON NEXT ASSY SIZE CHECKED ISSUED TOLERANCES XX 010 50 Thunder Scientific Corporation 623 Wyoming S E Albuquerque NM 87123 THIS DRAWING AND INFORMATION CONTAINED WITHIN IS PROPRIETARY TO T...

Page 94: ...ZE CHECKED ISSUED TOLERANCES XXX 010 50 Thunder Scientific Corporation 623 Wyoming S E Albuquerque NM 87123 THIS DRAWING AND INFORMATION CONTAINED WITHIN IS PROPRIETARY TO THUNDER SCIENTIFIC AND CANNO...

Page 95: ...CES XXX 010 50 Thunder Scientific Corporation 623 Wyoming S E Albuquerque NM 87123 THIS DRAWING AND INFORMATION CONTAINED WITHIN IS PROPRIETARY TO THUNDER SCIENTIFIC AND CANNOT BE COPIED OR REPRODUCED...

Page 96: ...25 1 09M 660mm 609mm 845mm SHEET 1 OF 1 DWG NO A DRAWN APPLICATION USED ON NEXT ASSY SIZE CHECKED ISSUED TOLERANCES XXX 010 50 Thunder Scientific Corporation 623 Wyoming S E Albuquerque NM 87123 THIS...

Page 97: ...T ASSY SIZE CHECKED ISSUED TOLERANCES XX 010 50 Thunder Scientific Corporation 623 Wyoming S E Albuquerque NM 87123 THIS DRAWING AND INFORMATION CONTAINED WITHIN IS PROPRIETARY TO THUNDER SCIENTIFIC A...

Page 98: ...port cap and insulation Replace top right console panel Chamber fluid filling is now complete 1 2 3 4 5 6 7 NO PROPYLENE GLYCOL IN THIS PORT REVISIONS DWN REV DESCRIPTION DATE APPROVED DWF D Added fun...

Page 99: ...DWG NO A DRAWN APPLICATION USED ON NEXT ASSY SIZE CHECKED ISSUED TOLERANCES XXX 010 50 Thunder Scientific Corporation 623 Wyoming S E Albuquerque NM 87123 THIS DRAWING AND INFORMATION CONTAINED WITHI...

Page 100: ...8 GA 16 GA 18 GA 18 GA 14 GA 14 GA 14 GA 14 GA 16 GA 1 2 3 4 5 6 7 4A FS2 FS3 TB1 FOR 110V FS3 3 15A FOR 240V FS3 1 6A REVISIONS DWN REV DESCRIPTION DATE APPROVED DWF C Drawn to SW 7 29 2014 SHEET 1 O...

Page 101: ...S2031 A UNLESS NOTED OTHERWISE THIRD ANGLE PROJECTION PROPRIETARY NOTICE N A SCALE N A 9A 8A 7A 3A 2A 1A C1 C2 CF1 CF2 SOL HM1 C1 CF1 SOL HM1 C2 CF2 C2 C1 C1 C1 C2 C2 TO CHASSIS 1 2 3 4 5 6 7 8 9 10 1...

Page 102: ...TTEN PERMISSION FURRY 4 7 2014 4 11 2014 4 11 2014 ACS Twin Electrical Schematic REV WT ACS2031 A UNLESS NOTED OTHERWISE THIRD ANGLE PROJECTION PROPRIETARY NOTICE N A SCALE N A SOL1 PIN 1 BROWN BLUE C...

Page 103: ...Chamber Pressure psia 5 Saturation Temperature C 6 Chamber Temperature C 7 Flow Rate L min 8 System Status The System Status parameter item 8 above indicates whether or not the system is currently gen...

Page 104: ...2 RH PcTc setpoint 3 Saturation Pressure setpoint psia 4 Saturation Temperature setpoint C 5 Flow Rate setpoint L min 6 Current control mode 1 2 or 3 The control mode parameter item 6 above indicates...

Page 105: ...s None Remarks Data Returned RU returns one of two values to indicate whether or not the system is currently generating running The 2 possible returned values are as follows VALUE DESCRIPTION 0 System...

Page 106: ...verrange 288 Pressure Transducer Failure 320 Low Pressure Overrange Saturation Pressure 480 Pressure Transducer Misalignment 16896 Saturation Temperature Underrange 17408 Presaturator Temperature Unde...

Page 107: ...5 or greater Syntax TF Parameters None Remarks Data Returned TF returns the value in whole C only of the cabinet fan temperature Examples The TF command is used to read the current cabinet temperature...

Page 108: ...been pressed Prerequisites None Syntax RUN Parameters None Remarks Data Returned None The only response is a carriage return linefeed terminator Examples The RUN command is used to start the system c...

Page 109: ...pressed Prerequisites None Syntax STO STOP Parameters None Remarks Data Returned None The only response is a carriage return linefeed terminator Examples The STOP command is used to stop a running sys...

Page 110: ...Port Parameters of the Benchtop Operations Manual to review and edit parameters Syntax PRI PRINT Parameters None Remarks Data Returned None The only response is a carriage return linefeed terminator I...

Page 111: ...stem should generate Remarks Control Mode Changed Sending R1 setpoint also changes the control mode to RH Pc mode 1 In this mode the RH PcTc and Saturation Pressure setpoints vary as system temperatur...

Page 112: ...ystem should generate Remarks Control Mode Changed Sending R2 setpoint also changes the control mode to RH PcTc mode 2 In this mode the RH Pc and Saturation Pressure setpoints vary as system temperatu...

Page 113: ...y that the system should control at Remarks Control Mode Changed Sending PS setpoint also changes the control mode to Saturation Pressure mode 3 In this mode the RH Pc and RH PcTc setpoints vary as sy...

Page 114: ...l at Remarks Precautions Chamber temperature follows Saturation Temperature When increasing Saturation Temperature always do so at low humidity so as to prevent condensation on cool devices within the...

Page 115: ...greater Syntax FS setpoint Parameters setpoint The setpoint value is the Flow rate in L min only that the system should control at Remarks Data Returned None The only response is a carriage return lin...

Page 116: ...System Authorization Code 2500 This code was designed to prevent unauthorized personnel access to the calibration coefficients...

Page 117: ...THUNDER SCIENTIFIC CORPORATION 623 Wyoming Blvd SE Albuquerque NM 87123 3198 www thunderscientific com...

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