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Dwyer Instruments DHII Digihelic II Series, Specifications-Installation And Operating Instructions

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Dwyer Instruments DHII Digihelic II Series Specifications-Installation And Operating Instructions Download Page 1

Bulletin B-31

Series DHII Digihelic

®

II Differential Pressure Controller

Specifications - Installation and Operating Instructions

DWYER INSTRUMENTS, INC. 

Phone: 219/879-8000     www.dwyer-inst.com

P.O. BOX 373 • MICHIGAN CITY, IN 46360, U.S.A.           

Fax: 219/872-9057         e-mail: [email protected]

www.

.com

[email protected]

1.800.561.8187

Summary of Contents for DHII Digihelic II Series

Page 1: ...sure Controller Specifications Installation and Operating Instructions DWYER INSTRUMENTS INC Phone 219 879 8000 www dwyer inst com P O BOX 373 MICHIGAN CITY IN 46360 U S A Fax 219 872 9057 e mail info dwyer inst com www com information itm com 1 800 561 8187 ...

Page 2: ...CLEARANCE HOLES FOR MOUNTING 3 17 64 83 4 1 8 105 WIRING TERMINAL ACCESS 5 7 32 132 56 4 9 64 105 17 8 LOCK WASHER 8 36 FLAT HEAD SCREWS DO NOT REMOVE THESE SCREWS TO GAIN ACCESS TO WIRING TERMINALS REMOVE THESE TWO SCREWS AND FLIP DISPLAY 90 DO NOT REMOVE THE SCREWS WITH POWER APPLIED TO INSTRUMENT HINGED STANDOFF WIRING TERMINALS OPTIONAL A 438 BRACKET MOUNTING DIAGRAM www com information itm co...

Page 3: ... 240 VDC 7VA max Output Signal 4 20 mA DC into 900 ohms max Zero Span Adjustments Accessible via menus Response Time 250 ms dampening set to 1 Display 4 digit backlit LCD 0 6 height LED indicators for set point and alarm status Electrical Connections Euro type removeable terminal blocks with watertight conduit fittings for 1 2 watertight conduit Process Connections 1 8 female NPT Enclosure Rating ...

Page 4: ...ceiving the 4 20 mA transmitter output MUST NOT share a common ground with the 24 VDC supply or damage to the Digihelic II Controller will result 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 CONNECTOR CONNECTOR ON ON LOWER LOWER BOARD BOARD CONNECTOR CONNECTOR ON ON UPPER UPPER BOARD BOARD 100 240 100 240 VAC VAC or or 132 240 132 240 VDC VDC POWER POWER NOTE NOTE 1 1 3 8 3 8 A ...

Page 5: ... on the Digihelic II Controller with a 1 2 wrench to prevent the fitting on the Digihelic II Controller from turning DIGIHELIC II CONTROLLER RS485 WIRING SHIELD SHIELD SHIELD SHIELD TIE TIE SHIELD SHIELD TO TO EARTH EARTH GROUND GROUND TO TO RS232 RS232 TO TO RS485 RS485 CONVERTER CONVERTER 120 120 OHM OHM RESISTOR RESISTOR LAST LAST UNIT UNIT ON ON RS485 RS485 BUSS BUSS WIRE WIRE NUT NUT DIGIHELI...

Page 6: ...ress ENTER and display will blink Adjust with UP or DOWN arrows Press ENTER to store Display will stop blinking Peak Valley SUB MENU resets display to present value SP AL MENU UP ARROW ENTER RESET KEY FUNCTIONS SP1 SP1 SP2 SP2 ALHI ALHI ALLO ALLO SCFM SCFM 99 99 99 99 X1K SP AL SP AL RST RST MENU MENU E E MULTIPLIER MULTIPLIER DESCRIPTOR DESCRIPTOR VISIBLE VISIBLE WITH WITH SOME SOME VELOCITY VELO...

Page 7: ...ad of setting a set point and deadband simply adjust SP1H or SP2H for the desired relay turn on point and then adjust SP1L or SP2L for the desired relay turn off point PRESSURE PRESSURE 0 0 0 0 TIME TIME 0 2 0 2 0 4 0 4 0 6 0 6 0 8 0 8 1 0 in w c In the above graph an instrument with a 1 0 range would have the SP1 relay turn on at 0 8 and off at 0 4 SP1H sets the relay turn on point and SP1L sets ...

Page 8: ...MENU MAP MENU MAP CONTINUED CONTINUED SETTINGS SETTINGS MAIN MENUS SUB MENUS MENUS UNAVAILABLE FOR BI DIRECTIONAL RANGES AND RANGES ABOVE 25 IN W C E E MENU MENU www com information itm com 1 800 561 8187 ...

Page 9: ...8 CONTINUED CONTINUED SETTINGS SETTINGS MAIN MENUS SUB MENUS E E MENU MENU www com information itm com 1 800 561 8187 ...

Page 10: ...9 MAIN MENUS SUB MENUS SETTINGS Menus present only in pressure operation E E MENU MENU www com information itm com 1 800 561 8187 ...

Page 11: ...ngineering units OUt Output Select a Single Set Point 2 Set Points or a Set Point and an Alarm mode of operation d S Display Monitor and adjust display related settings Peak Valley display resolution output and dampening AdU Advanced functions Modify advanced function parameters transmitter output scaling Modbus communication settings Maintenance Set Point settings and calibration www com informat...

Page 12: ...ion FLO Flow DIA Diameter If the instrument is set for Velocity the OPEr MENU will have an additional KFAC SUB MENU If the instrument is set for Flow the OPEr MENU will have additional KFAC and ArEA SUB MENUS These will be discussed under Velocity and Flow When scrolling through the OPEr SUB MENUS the measurement type the unit is currently set for will show the units in the upper right display The...

Page 13: ...L Velocity SUB MENU For velocity measurement the following units are available SFPM Standard feet per minute M S Meters per second Table 2 Available Velocity Ranges Note Air velocity and flow readings are based upon standard dry air conditions with an ambient temperature of 70 F and a barometric pressure of 29 92 INHG INPUT RANGE INWC 0 0 1 0 0 25 0 0 5 0 1 0 2 5 0 5 0 10 0 25 SFPM RANGE 0 1266 0 ...

Page 14: ...used with a pitot tube the manufacturer may specific a K Factor The adjustment range is 0 01 to 2 00 The factory setting is 1 Table 4 FLOr HI Maximum Duct Size English RANGE IN WC 0 1 0 25 0 5 1 2 5 5 10 25 SCFM RANGE 999 9 x 1K 999 9 x 1K 999 9 x 1K 999 9 x 1K 999 9 x 1K 999 9 x 1K 999 9 x 1K 999 9 x 1K MAX DUCT SIZE SQ FT 789 8 499 5 353 1 249 7 157 9 111 7 78 9 49 9 Table 5 FLOr LO Maximum Duct...

Page 15: ...tion for FLOr HI or entered in millimeters with 1 millimeter resolution ArEA Area select CIR for a circular duct or RECT for a rectangular duct If a circular duct is selected the DIA SUB MENU will be activated If a rectangular duct is selected the XDIM and YDIM SUB MENUS will be activated DIA Diameter enter the diameter of a duct XDIM Enter the X dimension of a duct YDIM Enter the Y dimension of a...

Page 16: ...Two fully independent set points SPAL Single set point and alarm 1SP SP1 Reverse or Direct Acting SUB MENU DIR Direct Relay turns on with increasing pressure REV Reverse Relay turns on with decreasing pressure 0 100 Process Direct Acting Time SPH SPL Relay Inactive Relay Active www com information itm com 1 800 561 8187 ...

Page 17: ...alarm may be configured as a High Alarm Low Alarm or High Low Alarm Alarm settings are all absolute and may be set to anywhere within the range of the instrument The dead bands of the alarms are fixed at 1 of full scale MIN PRESSURE MAX PRESSURE ALHI Relay OFF Relay ON HIGH ALARM FUNCTION MIN PRESSURE MAX PRESSURE ALLO Relay ON Relay OFF LOW ALARM FUNCTION MIN PRESSURE MAX PRESSURE ALLO Relay ON R...

Page 18: ... from 0 3600 seconds d S Display MAIN MENU PEAK Peak value rESO Resolution VALy Valley value Pd S Process display ZERO Zero DAMP Dampening level PEAK Peak SUB MENU The Peak feature stores the highest pressure reading the instrument has measured since the last reset or power up At power up PEAK is reset to the present pressure reading To manually reset the PEAK value press the RESET key while in th...

Page 19: ...ampening stabilizes the display from instabilities due to things such as vibration and excessive pressure fluctuations The dampening setting adjusts the amount of readings that are averaged for each display update Adjust the dampening value until the display reads a stable value for the application AdU Advanced MAIN MENU POL Process output low ADDR Modbus address POH Process output high WR Modbus ...

Page 20: ...formation from and write information to the instrument ZERO and SPAN Calibration of Zero and Span SUB MENUS The lower display reads CAL in this mode ZERO Calibration Note For accurate calibration DO NOT apply any pressure when performing this function With the display reading ZERO press the ENTER key The upper display will blink Press ENTER again to complete the zeroing of the instrument or press ...

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