Dwyer Instruments DHII Digihelic II Series, Installation And Operating Instructions Manual

Page 1: ...etin B 31 Series DHII Digihelic II Differential Pressure Controller Specifications Installation and Operating Instructions www GlobalTestSupply com Find Quality Products Online at sales GlobalTestSupply com ...

Page 2: ...TING HOLE PATTERN 1 5 16 33 3 17 64 83 4 1 8 105 WIRING TERMINAL ACCESS 4 23 32 120 3 7 16 87 12 1 45 64 43 18 1 17 32 38 61 4 23 32 120 45 64 17 78 4X Ø3 16 4 76 CLEARANCE HOLES FOR MOUNTING MOUNTING HOLE PATTERN 1 5 16 33 1 15 16 48 97 25 32 21 18 2 31 32 75 39 1 5 32 29 59 4 9 64 105 17 5 7 32 132 54 BRACKETS ARE OPTIONAL 4 1 8 105 3 17 64 83 8 LOCK WASHER 8 36 SLOTTED MACHINE SCREW OPTIONAL A ...

Page 3: ...put 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 Designed to meet NEM...

Page 4: ...SWITCH Device receiving 4 20mA signal Check specific REMOTE RESET SWITCH Device receiving 4 20mA signal Check specifica REMOTE RESET SWITCH Device receiving 4 20mA signal Check specificat REMOTE RESET SWITCH Device receiving 4 20mA signal Check specificati REMOTE RESET SWITCH Device receiving 4 20mA signal Check specificatio REMOTE RESET SWITCH Device receiving 4 20mA signal Check specification RE...

Page 5: ... MAY BE DAISY CHAINED THE 120 OHM RESISTOR IS USUAL DIGIHELIC RS485 WIRING TO DAISY CHAIN INSTRUMENTS ON THE RS485 BUSS UP TO 128 UNITS MAY BE DAISY CHAINED THE 120 OHM RESISTOR IS USUALL DIGIHELIC RS485 WIRING TO DAISY CHAIN INSTRUMENTS ON THE RS485 BUSS UP TO 128 UNITS MAY BE DAISY CHAINED THE 120 OHM RESISTOR IS USUALLY ONLY DIGIHELIC RS485 WIRING TO DAISY CHAIN INSTRUMENTS ON THE RS485 BUSS UP...

Page 6: ...SOME VELOCITY AND FLOW MULTIPLIER DESCRIPTOR VISIBLE WITH SOME VELOCITY AND F MULTIPLIER DESCRIPTOR VISIBLE WITH SOME VELOCITY AND FL MULTIPLIER DESCRIPTOR VISIBLE WITH SOME VELOCITY AND FLO MULTIPLIER DESCRIPTOR VISIBLE WITH SOME VELOCITY AND FLOW RANGES MULTIPLIER DESCRIPTOR VISIBLE WITH SOME VELOCITY AND FLOW R MULTIPLIER DESCRIPTOR VISIBLE WITH SOME VELOCITY AND FLOW RA MULTIPLIER DESCRIPTOR V...

Page 7: ...hen Visible when Visible when mode mode mode Visible when Visible when Visible when mode mode mode CONTROL MODE C CO CON CONT CONTR CONTRO CONTROL CONTROL CONTROL M CONTROL MO CONTROL MOD CONTROL MODE CONTROL MODE CONTROL MODE C CONTROL MODE CO CONTROL MODE CON CONTROL MODE CONT CONTROL MODE CONTR CONTROL MODE CONTRO CONTROL MODE CONTROL CONTROL MODE CONTROL CONTROL MODE CONTROL M CONTROL MODE CON...

Page 8: ...TIN SETTING SETTINGS MAIN MENUS SUB MENUS MENUS UNAVAILABLE FOR BI DIRECTIONAL RANGES AND RANGES ABOVE 25 IN W C RST PA RST PA RST PA RST PA RST PA RST PA RST PA RST PAG RST PAG RST PAG RST PAG RST PAG RST PAG RST PAG E E RST RST RST RST RST RST RST MENU M ME MEN MENU www GlobalTestSupply com Find Quality Products Online at sales GlobalTestSupply com ...

Page 9: ...ETT SETTI SETTIN SETTING SETTINGS MAIN MENUS SUB MENUS RST PA RST PA RST PA RST PA RST PA RST PA RST PA RST PA RST PA RST PA RST PA RST PA RST PA RST PA E E RST RST RST RST RST RST RST MENU M ME MEN MENU www GlobalTestSupply com Find Quality Products Online at sales GlobalTestSupply com ...

Page 10: ...RST PAG RST PAG RST PAG RST PAG RST PAG RST PAG RST PAG RST PAG RST PAG RST PAG RST PAG RST PAG RST PAG RST PAG E E RST RST RST RST RST RST RST MENU M ME MEN MENU RST RST RST RST RST RST RST www GlobalTestSupply com Find Quality Products Online at sales GlobalTestSupply com ...

Page 11: ... 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 GlobalTestSupply com Find Qualit...

Page 12: ...to measure pressu is presently set to measure pressur is presently set to measure pressure Units not visible is presently set to measure pressure U is presently set to measure pressure Un is presently set to measure pressure Uni is presently set to measure pressure Unit is presently set to measure pressure Units is presently set to measure pressure Units is presently set to measure pressure Units ...

Page 13: ...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 2002 0 2832 0 4004 0...

Page 14: ...be 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 Size Metric RANGE I...

Page 15: ...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 duct OUt Output MAI...

Page 16: ...t 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 GlobalTestSupply com Find Quality Products Online at sales GlobalTestSupply com ...

Page 17: ...ed 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 Relay OFF Relay ON HIG...

Page 18: ...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 the PEAK SUB MENU VALy ...

Page 19: ...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 write enable disable...

Page 20: ...nds from Modbus Modbus can read information 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 z...