Model DH50 User Manual
Contents
1. PACER INSTRUMENTS 1450 First Ave Chippewa Falls WI 54729 800 283 1141 or 715 723 1141 Fax 715 723 7890 sales pacer instruments com INSTRUMENTS Model DH50 User Manual Pacer Instruments Inc www pacer instruments com Phone 1 800 283 1141 DH50 User Manual Rev 1 0 11 Aug 2007 PACER INSTRUMENTS 1450 First Ave Page 2 of 8 Chippewa Falls WI 54729 800 283 1141 or 715 723 1141 Fax 715 723 7890 sales pacer instruments com Warranty This product is fully warranted against defective materials and or workmanship for a period of one year after purchase provided it was not improperly used For your protection please use this product as soon as possible If returned it must be securely wrapped sent prepaid and insured to Pacer Industries Inc 1450 First Avenue Chippewa Falls WI 54729 PH 715 723 1141 FX 715 723 7890 Please include a note with name address telephone number and description of the problem Although we provide assistance on Pacer products both personally and through our literature it is still the total responsibility of the customer to determine the suitability of the product for use in their application This manual is provided by Pacer Industries without any kind of warranty Precautions have been taken in accurately preparing this manual however we neither assume responsibility for any omissions or errors that may appear nor assume liability for any da2. alkaline batteries battery compart ment battery hinge battery points lid tab APPENDIX D ERROR CODES E 06 E 07 E 08 E 09 E 10 E 11 Humidity is less than 3 0 RH Humidity is greater than 97 RH Temp is less than 95 0 C 139 F Temp is greater than 205 0 C 401 0 F Humidity outside of range 3 0 to 97 0 RH used in calculating dew point Temperature outside of range 20 0 to 80 0 C 4 0 to 176 0 F used in calculating dew point DH50 User Manual Rev 1 0 11 Aug 2007 Pacer Instruments Inc www pacer instruments com Phone 1 800 283 1141 PACER INSTRUMENTS 1450 First Ave Page 8 of 8 Chippewa Falls WI 54729 800 283 1141 or 715 723 1141 Fax 715 723 7890 sales pacer instruments com Notes DH50 User Manual Pacer Instruments Inc Rev 1 0 www pacer instruments com 11 Aug 2007 Phone 1 800 283 1141
3. PN 6304 surface probe Included piece PN 6222 DH50 unit 1 piece PN 6060 HTP201 temperature and RH probe 2 pieces AA 1 5V alkaline batteries 1 piece PN 6002 hard shell carrying case 1 piece PN M2941 operation manual DH50 User Manual Pacer Instruments Inc Rev 1 0 www pacer instruments com 11 Aug 2007 Phone 1 800 283 1141 PACER INSTRUMENTS 1450 First Ave Page 5 of 8 Chippewa Falls WI 54729 800 283 1141 or 715 723 1141 Fax 715 723 7890 sales pacer instruments com SECTION 2 SWITCH FUNCTIONS ON OFF TEMP RH DEW PNT MAX MIN DIGITAL HYGRO THERMOMETER MODEL DHSO Pressing ON OFF key switches unit ON NOTE Display will show all its elements followed by the remaining battery capacity then a reading Pressing the TEMP key displays temperature in degrees Fahrenheit F Pressing the key a second time displays temperature in degrees Celsius C Pressing the RH key displays relative humidity with 0 1 RH resolution Pressing DEW PNT key displays calculated dew point in F with 0 1 F resolution Pressing the key a second time displays dew point in C with 0 1 C resolution Pressing MAX MIN key displays the highest reading since turn on for the parameter being displayed The temperature max is indicated by a flashing H tP followed by the reading The RH max is indicated by a flashing H rH followed by the reading Dew poin
4. When the battery symbol appears during normal operation replace the batteries 4 If not already being displayed press TEMP to display temperature then place probe 5 If not already being displayed press RH to display relative humidity then place probe 6 If not already being displayed press DEW PNT to display dew point temperature then place probe 7 To get maximum readings since turn on press MAX MIN key to get minimum readings press MAX MIN key a second time For explanation of the displayed views see MAX MIN paragraph in SECTION 2 8 To HOLD the displayed reading press the HOLD RESET key Press key again to clear the HOLD condition APPENDIX A CONNECTOR DIAGRAM Connector PinoutsA ire Code top view keyways ee 3 2 Analog Output Temperature RH Connector Connector Pin 1 Gnd Blk Pint RTDta Grn Pin 2 Temp Grn Pin 2 Gnd Blk Pin 3 RH Gra Pin 3 RH Gra Pin4 NC Yel Pin 4 V Red Pin 5 RTD2a Yel DH50 User Manual Pacer Instruments Inc Rev 1 0 www pacer instruments com 11 Aug 2007 Phone 1 800 283 1141 PACER INSTRUMENTS 1450 First Ave Page 7 of 8 Chippewa Falls WI 54729 800 283 1141 or 715 723 1141 Fax 715 723 7890 sales pacer instruments com APPENDIX B LCD DISPLAY SYMBOLS LOW RELATIVE DISPLAY BATTERY HUMIDITY HOLD DEGREES CELCIUS DEGREES FAHRENHEIT DEW POINT APPENDIX C CHANGING BATTERIES 2 AA
5. 1 digit Resolution Relative Humidity 0 1 RH Temperature 0 1 F or C 1 F below 99 9 F Response Time Relative Humidity 90 of final value in 15 sec Temperature Approximately 60 seconds Temperature drift 0 5 RH per 10 C 18 F Operating Temperature Instrument 32 to 125 F 0 to 50 C Probe 4 to 176 F 20 to 80 C Power Supply 2 AA alkaline batteries Battery Life Approximately 300 hours Battery check Automatic low battery display Analog Outputs optional Relative Humidity 0 1V represents 0 100 RH scale factor 1 OmV RH Temperature 0 1V represents 100 to 200 C scale factor 3 33mV C Output Impedance 1KQ DH50 User Manual Pacer Instruments Inc Rev 1 0 www pacer instruments com 11 Aug 2007 Phone 1 800 283 1141 PACER INSTRUMENTS 1450 First Ave Page 4 of 8 Chippewa Falls WI 54729 800 283 1141 or 715 723 1141 Fax 715 723 7890 sales pacer instruments com Dimensions Instrument 7 1 x 3 0 x 0 8 Probe 4 5 x 1 diameter Weight 8 ounces with batteries Display 0 5 LCD 4 digits Options AGO 4 analog out Analog out port includes model 3839 analog output cable order DH50 Kit PN 6029 CG 4 charger PN 3303 with 4 NiMH batteries HTP201 RH probe PN 6060 replacement RH probe Sinter filter PN 3901 for harsh environments Special purpose temperature probes PT201S probe PN 6301 GP immersion probe PT202S probe PN 6303 air probe PT203S probe
6. mages that result from the use of the products in accordance with the information contained in the manual DH50 User Manual Pacer Instruments Inc Rev 1 0 www pacer instruments com 11 Aug 2007 Phone 1 800 283 1141 PACER INSTRUMENTS 1450 First Ave Page 3 of 8 Chippewa Falls WI 54729 800 283 1141 or 715 723 1141 Fax 715 723 7890 sales pacer instruments com INTRODUCTION Pacer s model DH50 digital hygro thermometer is an accurate and versatile instrument for measuring temperature relative humidity and calculated dew point F or C are selected by switch Included is a hold reset button that can freeze the display when recording readings The instrument can also indicate maximum and minimum readings from turn on and optional is an analog output connector and cable This instrument is a must for anyone in the heating ventilation and air conditioning industry Specific applications include indoor air quality industrial process or building atmospheric control lab conditions and other applications where accurate temperature RH and dew point temperature are needed SECTION 1 SPECIFICATIONS Sensors Humidity sensor Capacitive Thin Film Temperature PT100 RTD Range Relative Humidity 5 to 95 RH Temperature RH probe 4 to 176 F 20 to 80 C Temperature optional probes 139 to 392 0 F 95 to 200 0 C Accuracy Relative Humidity 2 RH Temperature 0 2 of Reading
7. t max is indicated by a flashing H dP followed by the reading Pressing MAX MIN a second time will display the lowest reading since turn on The display will function as above except the indicators will be L tP L rH and L dP respectively Clear internal memory by turning unit OFF Clear the MAX MIN mode by pressing any other key except HOLD DH50 User Manual Rev 1 0 11 Aug 2007 Pacer Instruments Inc www pacer instruments com Phone 1 800 283 1141 PACER INSTRUMENTS 1450 First Ave Page 6 of 8 Chippewa Falls WI 54729 800 283 1141 or 715 723 1141 Fax 715 723 7890 sales pacer instruments com HOLD RESET Pressing HOLD RESET key will freeze the reading on the display HOLD is displayed and the reading is held Pressing the key a second time frees the display SECTION 3 OPERATION NOTE Unit should be OFF before changing batteries or attaching probe or analog cable if so equipped 1 Remove battery compartment lid and insert batteries replace lid see APPENDIX C 2 Attach the probe by aligning the keyway inserting connector and turning collar to tighten see APPENDIX A for connector wiring diagram 3 Press the ON OFF key to turn unit ON The display will show all its elements followed by the remaining battery capacity see APPENDIX B bA85 means the battery is at 85 capacity Temperature in F will now display NOTE
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