Dwyer DHII User Manual

Bulletin B-31Series DHII Digihelic®II Differential Pressure ControllerSpecifications - Installation and Operating InstructionsDWYER INSTRUMENTS, INC.

9 MAIN MENUS SUB MENUSSETTINGSMenus present onlyin pressure operation EE MENUMENU

10Main Menu Selections (Upper Right Display Reads ME NU )SECr Security - Lock out access to Set Point and Alarm settings, or lock out access to all se

11MAIN MENUS and SUB MENUSSECr (Security) MAIN MENUSECr is the only SUB MENU in the security MENU. When the security SUB MENU is selected, the present

12PrES (Pressure) SUB MENUFor pressure measurement, the following units are available:Table 1 Pressure Range vs. Available UnitsINWC.1000.2500.50001.

13FLO (Flow) SUB MENUFor flow measurements the following units are available:SCFM - Standard cubic feet per minuteM^3H - Cubic meters per hourFLO r (

14ArEA, DI A, XD IM and Y DI M SUB MENUSThese SUB MENUS become accessible if the instrument is set for flow. When measuring flow, thearea of the

150100ProcessReverse ActingTimeSPHSPLRelay InactiveRelay ActiveCtrL (Control) SUB MENU1SP - Single set point2SP - Two fully independent set pointsSPAL

16The following alarm function SUB MENUS are activated when CtrLis set to SPAL:AL (Alarm Type) SUB MENUHI- High alarmLO- Low alarmHILO- For a high/low

17ALrE (Alarm Reset) SUB MENUONOF- Automatic resetHOLD - Manual reset. An alarm is reset by the RESET key on the front panel, or an external reset swi

18rESO (Resolution) SUB MENUThe Digihelic®II Controller is capable of displaying four digits of resolution. However, at very low pressures the instabi

1DIMENSIONS!1-1/2[38.35]1-45/64[43.18]2-23/64[59.94]1-31/64[37.62]4-23/32[120]4-23/32[120]3-7/16[87.12]1-5/16[33]1-17/32[38.61]45/64[17.78]1-1/16[26.9

MSP1 and MSP 2 (Maintenance Set Point 1 & 2) SUB MENUSAdjust for the desired maintenance set points when the unit is placed in the maintenance mod

2SPECIFICATIONSService: Air and non-combustible, compatible gases.Wetted Materials: Consult factory.Housing Material: Aluminum, glass.Accuracy: ±0.5%

3Notes:1. The instrument may be powered from the AC line or 24 VDC. Do not wire AC line terminals 1-2 onthe lower board and 24 VDC terminals 4-5 on t

4When wiring the instrument, you must follow industry standard practice for control andprotection against Electro-Static Discharge (ESD).

5SP/ALSP/AL MENUMENU EE RSTRST HOME POSITION FUNCTIONSequences the display through SET POINT andALARM settingsAllows access to t

6SETTING SET POINTS AND ALARMSThe hot key provides direct access to the Set Point and Alarm MENU. The Set Point and AlarmMENUS that are displa

7MENU MAPMENU MAPCONTINUEDCONTINUEDSETTINGSSETTINGSMAIN MENUS SUB MENUSMENUSUNAVAILABLEFOR BI-DIRECTIONALRANGES ANDRANGES ABOVE 25 IN. W.C. E

8CONTINUEDCONTINUEDSETTINGSSETTINGSMAIN MENUS SUB MENUS EE MENUMENU