Dwyer Instruments DH3 Series Installation And Operating Instructions Manual
Digihelic differential pressure controller
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Summary of Contents for Dwyer Instruments DH3 Series
- Page 1 Bulletin B-30 Series DH3 Digihelic Differential ® Pressure Controller Specifications - Installation and Operating Instructions DWYER INSTRUMENTS, INC. Phone: 219/879-8000 dwyer-inst.com P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: 219/872-9057 e-mail: info@dwyermail.com...
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Page 2: Switch Specifications
DIMENSIONS (4) 6-32 HOLES EQUALLY SPACED ON A 2-1/16 5-1/8 (130.18) B.C. [52.39] PANEL MOUNTING 1/8 FEMALE NPT HIGH [50.80] PRESSURE CONNECTION Ø5 1-1/4 [127.00] [31.75] ø4-47/64 1/8 FEMALE NPT LOW [120.25] PRESSURE CONNECTION Ø4 [101.60] 5/8 [15.88] FACE PANEL MAX 5-1/2 [139.70] O.D. -
Page 3: Installation
INSTALLATION LOCATION: Select a clean, dry location free from shock and vibration where temperature limits will not be exceeded. Distance from the transmitter to the receiver is limited only by total loop resistance. See ELECTRICAL CONNECTIONS. Tubing feeding pressure to the instrument can be practically any length required, but long lengths will increase response time slightly. - Page 4 MOUNTING: The DH3 may be either panel (flush) mounted or surface mounted. Panel Mounting - Cut a 4-3/4˝ or 121 mm diameter hole in the panel and insert the unit from the front. Slip on the mounting ring with the stepped side facing rear. Next, fit the snap ring into the narrow groove at back edge of bezel. Thread four (6) 32 x 1-1/4˝...
- Page 5 For -SS Bezel Installation Provide a 4-9/16˝ opening in panel. Insert gage and secure with supplied mounting hardware. WIRING The DH3 uses a standard 15 pin male high density D-Sub connector available from most electronic distributors. A pre-wired 18˝ cable is included with each unit. See below table for cable color wiring information. 15 PIN Connector Cable...
- Page 6 FRONT PANEL SP2 DESCRIPTOR SP1 DESCRIPTOR ALARM DESCRIPTOR MULTIPLIER ALLO ALHI DESCRIPTOR VISABLE WITH SOME VELOCITY INWC UNITS AND FLOW RANGES 1.000 INPUT VALUE MENU SP/AL KEY FUNCTIONS Keys Home Position Function Main Menu Function Sub Menu Function Sequences the display Return to home Return to home SP/AL...
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Page 7: Set Point Adjustment
SETTING SET POINTS AND ALARMS SP/AL hot key provides direct access to the Set Point and Alarm MENU. The Set Point and Alarm MENUS that are displayed are based upon the Control (CtrL) SUB MENU. CONTROL MODE CONTROL MODE CONTROL MODE SP/AL SP/AL SP/AL... - Page 8 Menu Map MAIN MENUS SUB MENUS SETTINGS MENUS UNAVAILABLE BI-DIRECTIONAL RANGES AND RANGES ABOVE 25 IN. W.C. CONTINUED MENU...
- Page 9 SETTINGS MAIN MENUS SUB MENUS CONTINUED MENU...
- Page 10 SETTINGS MAIN MENUS SUB MENUS Menus present only in pressure operation MENU...
- Page 11 MENU Main Menu Selections (Upper Right Display Reads SECr Security - Lock out access to Set Point and Alarm settings, or lock out access to all settings. OPEr Operation - Selection of Pressure, Velocity or Flow and corresponding engineering units. Output - Select a Single Set Point, 2 Set Points, or a Set Point and an Alarm mode of operation.
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Page 12: Main Menus And Sub Menus
MAIN MENUS and SUB MENUS SECr (Security) MAIN MENU SECr 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 PrES (Pressure) SUB MENU For pressure measurement, the following units are available: MMHG - Inches of water column - Millimeters of mercury FTWC MBAR - Feet of water column - Millibar MMWC - Millimeters of water column - Pascal CMWC - Centimeters of water column - Kilopascals - Pounds per square inch...
- Page 14 (Flow) SUB MENU For flow measurements the following units are available: SCFM - Standard cubic feet per minute - Cubic meters per hour FLOr (Flow Range) SUB MENU - 99.99 x 1K flow range - 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 ArEA XDIM YDIM 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. For a rectangular duct the maximum size is specified in square feet or meters.
- Page 16 CtrL (Control) SUB MENU - Single set point - Two fully independent set points SPAL - Single set point and alarm (SP1 Reverse or Direct Acting) SUB MENU - Direct. Relay turns on with increasing pressure - Reverse. Relay turns on with decreasing pressure Relay Inactive Relay Active Relay Inactive...
- Page 17 CtrL SPAL The following alarm function SUB MENUS are activated when is set to (Alarm Type) SUB MENU - High alarm - Low alarm HILO - For a high/low guardband type alarm ALARM ADJUSTMENT Alarm settings are dependent upon the selected alarm mode. The DH3 differential pressure controller alarm may be configured as a High Alarm, Low Alarm, or High/Low Alarm.
- Page 18 AL0S (Alarm Output State) SUB MENU CL0S - Alarm relay contacts close upon alarm condition 0PEN - Alarm relay contacts open upon alarm condition ALrE (Alarm Reset) SUB MENU ONOF - Automatic reset HOLD - Manual reset. An alarm is reset by the RESET key on the front panel, or an external reset switch. AL.H (Low Alarm Inhibit) SUB MENU - Alarm inhibit is on...
- Page 19 rESO (Resolution) SUB MENU The DH3 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. 3DIG Three digit resolution ( ) can only be active when there is at least one digit to the right of a decimal.
- Page 20 , apply full scale pressure to the unit. Press the ENTER key. The upper display will MENU blink. Press ENTER again to complete the calibration or press the key to cancel. ©Copyright 2017 Dwyer Instruments, Inc. Printed in U.S.A. 11/17 FR# 443555-00 Rev.5 DWYER INSTRUMENTS, INC.
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