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

Differential pressure controller
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1.800.561.8187
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, IN 46360, U.S.A.
Series DHII Digihelic
Specifications - Installation and Operating Instructions
www.
II Differential Pressure Controller
®
information@itm.com
.com
Phone: 219/879-8000
Fax: 219/872-9057
Bulletin B-31
www.dwyer-inst.com
e-mail: info@dwyer-inst.com

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  • Page 1 Bulletin B-31 Series DHII Digihelic II Differential Pressure Controller ® Specifications - Installation and Operating Instructions 1.800.561.8187 information@itm.com www. .com 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...

  • Page 2: Wiring Terminal Access

    DIMENSIONS 4-23/32 1-31/64 3-7/16 1-1/2 [120] [37.62] [87.12] [38.35] 4-23/32 [120] 1-45/64 [43.18] 2-23/64 [59.94] 1-45/64 1-17/32 1-5/16 45/64 [43.18] [38.61] 4X Ø3/16 [4.76] [33] [17.78] CLEARANCE HOLES FOR MOUNTING 1-1/16 3-17/64 [26.97] MOUNTING HOLE [83] PATTERN 1-7/8 [47.5] 4-1/8 [105] OPTIONAL A-438 BRACKET WIRING TERMINAL ACCESS...
  • Page 3 SPECIFICATIONS Service: Air and non-combustible, compatible gases. Wetted Materials: Consult factory. Housing Material: Aluminum, glass. Accuracy: ±0.5% at 77°F (25°C) including hysteresis and repeatability (after 1 hour warm-up). Stability: < ±1% per year. Pressure Limits: Ranges ≤ 2.5 in. w.c. = 2 psi 5˝: 5 psi;...
  • Page 4 WIRING CONNECTOR CONNECTOR CONNECTOR CONNECTOR LOWER LOWER BOARD BOARD UPPER UPPER BOARD BOARD 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 A- A- RS485 RS485 SERIAL SERIAL COMMUNICATION COMMUNICATION 3/8 A A 250vac 250vac MEDIUM MEDIUM LAG...

  • Page 5: Remove Cover

    When wiring the instrument, you must follow industry standard practice for control and protection against Electro-Static Discharge (ESD). Failure to exercise good ESD practices may cause damage to the control. WIRING 1. Remove cover. 2. To gain access to the wiring terminal blocks, remove the upper and lower screws toward the center of the display board, and then flip the display board up at a 90°...
  • Page 6 MULTIPLIER MULTIPLIER DESCRIPTOR DESCRIPTOR VISIBLE VISIBLE WITH WITH SOME SOME VELOCITY VELOCITY FRONT FRONT PANEL PANEL AND FLOW FLOW RANGES RANGES UNITS UNITS SCFM SCFM 99.99 99.99 PROCESS PROCESS VALUE VALUE HIGH HIGH ALARM ALARM DESCRIPTOR DESCRIPTOR DESCRIPTOR DESCRIPTOR ALLO ALLO ALHI ALHI...

  • Page 7: Control Mode

    SETTING SET POINTS AND ALARMS hot key provides direct access to the Set Point and Alarm MENU. The Set Point and Alarm SP/AL SP/AL MENUS that are displayed are based upon the Control (CtrL) SUB MENU. CONTROL MODE CONTROL MODE CONTROL MODE CONTROL MODE CONTROL MODE CONTROL MODE...

  • Page 8: Main Menus

    MENU MAP MENU MAP MAIN MENUS SUB MENUS SETTINGS SETTINGS MENUS UNAVAILABLE BI-DIRECTIONAL RANGES AND RANGES ABOVE 25 IN. W.C. 1.800.561.8187 information@itm.com CONTINUED CONTINUED www. .com MENU MENU...
  • Page 9 SETTINGS SETTINGS MAIN MENUS SUB MENUS CONTINUED CONTINUED MENU MENU 1.800.561.8187 information@itm.com www. .com...
  • Page 10 SETTINGS MAIN MENUS SUB MENUS Menus present only in pressure operation MENU MENU 1.800.561.8187 information@itm.com www. .com...
  • Page 11 Main Menu Selections (Upper Right Display Reads M E N U ) Security - Lock out access to Set Point and Alarm settings, or lock out access to all S E C r settings. Operation - Selection of Pressure, Velocity or Flow and corresponding engineering units. O P E r Output - Select a Single Set Point, 2 Set Points, or a Set Point and an Alarm mode of O U t...

  • Page 12: Main Menus And Sub Menus

    MAIN MENUS and SUB MENUS S E C r (Security) MAIN MENU S E C r is the only SUB MENU in the security MENU. When the security SUB MENU is selected, the present security level is displayed in the upper right hand display. To change the security level, adjust the number displayed to the number shown in the following table for the desired security level.
  • Page 13 P r E S (Pressure) SUB MENU For pressure measurement, the following units are available: I N W C - Inches of water column M M H G - Millimeters of mercury F T W C - Feet of water column M B A R - Millibar M M W C - Millimeters of water column P A - Pascal...
  • Page 14 F L O (Flow) SUB MENU For flow measurements the following units are available: S C F M - Standard cubic feet per minute M ^ 3 H - Cubic meters per hour F L O r (Flow Range) SUB MENU L O - 99.99 x 1K flow range H I - 999.9 x 1K flow range Tables 3 -6 show the flow ranges available, and the maximum duct size that can be set for each input range.
  • Page 15 A r E A , D I A , X D I M and Y D I M SUB MENUS These SUB MENUS become accessible if the instrument is set for flow. When measuring flow, the area of the duct must be specified. Tables 3 and 4 show the input range vs maximum flow and duct size.
  • Page 16 C t r L (Control) SUB MENU 1 S P - Single set point 2 S P - Two fully independent set points S P A L - Single set point and alarm 1 S P (SP1 Reverse or Direct Acting) SUB MENU D I R - Direct.

  • Page 17: Alarm Adjustment

    The following alarm function SUB MENUS are activated when C t r L is set to S P A L : A L (Alarm Type) SUB MENU H I - High alarm L O - Low alarm H I L O - For a high/low guardband type alarm ALARM ADJUSTMENT Alarm settings are dependent upon the selected alarm mode.
  • Page 18 A L r E (Alarm Reset) SUB MENU O N O F - Automatic reset H O L D - Manual reset. An alarm is reset by the RESET key on the front panel, or an external reset switch. A L . H (Low Alarm Inhibit) SUB MENU O N - Alarm inhibit is on O F F - Alarm inhibit is off If A L .
  • Page 19 r E S O (Resolution) SUB MENU The Digihelic II Controller is capable of displaying four digits of resolution. However, at very low ® pressures the instability of the pressure may cause fluctuations in the least significant digit causing the least significant digit to be of little value. Three digit resolution (3 D I G ) can only be active when there is at least one digit to the right of a decimal.
  • Page 20 Press ENTER again to complete the calibration or press the M E N U key to cancel. 1.800.561.8187 information@itm.com www. .com ©Copyright 2013 Dwyer Instruments, Inc. Printed in U.S.A. 10/13 FR# 19-443434-00 Rev. 3 DWYER INSTRUMENTS, INC. Phone: 219/879-8000 www.dwyer-inst.com P.O.

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