Series DM-1200 DigiMag® Digital Differential Pressure and Air Flow GageSpecifications - Installation and Operating InstructionsBulletin P-DM-1200The Series DM-1200 DigiMag® Digital Differential Pressure and Air Flow Gage is the ideal digital instrument to take the place of analog mechanical pressure gages. The DigiMag® Digital Gages are more versatile than analog gages with their ability to be field-programmed to select pressure, air velocity or flow operation. The DigiMag® Digital Differential Pressure Gages have an added feature for filter applications where a set point can be input where the display will blink when the filter is dirty, alerting the user that a maintenance action needs to occur. Programming the Series DM-1200 is easy using the menu key to access 4 simplified menus which provide access to: Security level; engineering units; K-factor for use with various Pitot tubes and flow sensors, circular or rectangular duct size for volumetric flow operation; filter set point; view peak and valley process readings; digital damping for smoothing erratic process applications; display update to conserve battery life; zero and span field calibration. The Series DM-1200 DigiMag® Digital Differential Pressure and Air Flow Gage possesses a full-scale accuracy of 1% on ranges down to 2 in w.c. and 2% accuracy down to the very low ranges of 1 in to 0.25 in w.c. DigiMag® Digital Differential Pressure Gages offer power versatility by working with 9 to 24 VDC line power or simply 9V battery power. If using line power and connecting the 9V battery, the battery will act as a back-up if line power is lost or interrupted.SPECIFICATIONSService: Air and non-combustible, compatible gases.Wetted Materials: Consult factory.Housing Materials: Glass filled plastic.Accuracy: ±1% F.S. including linearity, hysteresis and repeatability; ±2% F.S. for ranges 1 in w.c. and below.Temperature Limits: 0 to 140°F (-18 to 60°C).Compensated Temperature Limits: 32 to 122°F (0 to 50°C).Long Term Stability: ±1% F.S. per year.Thermal Effect: ±0.05% F.S./°F typ.; ±0.10% F.S./°F for ranges 1 in w.c. and below.Display: 4-digit LCD (Digits: 0.60˝ H x 0.33˝ W).Display Update: Selectable for 1 second to 10 minutes or update only from button push.Pressure Limits: 5 in w.c. and lower = 2 psi (13.7 kPa) 10 in w.c. and higher = 11 psi (75 kPa).Power Requirements: 9V battery or external power supply 9-24 VDC. Battery included but not connected.Type of Battery: 9V alkaline battery (Duracell® PC 1604 or equivalent).Battery Service Life: Battery life depending on the Display Update setting: 150 hours (typical) if Display Update = 1 second; 9 months (typical) if Display Update = 10 minutes; 1.5 years (typical) if Display Update is disabled. Battery may last up to four times longer when using lithium-based battery ULTRALIFE U9VL-J.Current Consumption: 5 mA maximum.Electrical Connections: Removable terminal block for 16 to 26 AWG.Electrical Entry: Cable gland for 0.114 to 0.250˝ (2.9 to 6.4 mm) diameter cable.Process Connections: 1/8˝ (3 mm) ID tubing.Enclosure Rating: NEMA 4X (IP66).Weight: 1.18 lb (535 g).Size: 5˝ (127 mm) O.D. front face.Agency Approvals: CE, EN 61326-1 [Immunity Test Requirement for Industrial En-vironments] with the following SPEC: IEC61000-3-2, IEC61000-3-3, IEC61000-4-2, IEC61000-4-3, IEC61000-4-4, IEC61000-4-5, IEC61000-4-6, and IEC61000-4-11.Ø5.002.33Duracell® is a registered trademark of The Gillette Company®DWYER INSTRUMENTS, INC.P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.Phone: 219/879-8000Fax: 219/872-9057www.dwyer-inst.come-mail: info@dwyermail.comINSTALLATIONMountingA vertical position required. That is the position in which all standard models are calibrated at the factory. Provide a 4-9/16˝ diameter opening in panel. Insert gage and secure in place with provided screws and adapters.Included Accessories:Mounting lugs – 36-20 x 2-1/2 screws – 34-20 x 3/8 screws – 3 (mounting hole depth is 3/8˝ [9.53])Cable gland – 1Pressure ConnectionsTwo integral tubing connections are provided on the back of the gage. They are sized to fit 3/16˝ (4.8 mm) I.D. x 5/16˝ (7.9 mm) O.D. flexible PVC tubing. To measure single positive pressure, connect tubing to the + port and vent the – port to atmosphere. To measure single negative pressure (vacuum), connect tubing to the – port and vent the + port to atmosphere. To measure differential pressure, connect higher pressure to the + port and lower pressure to the – port. Be sure the pressure rating of the tubing exceeds that of the operating ranges.Electrical ConnectionsA 9V battery or an external power supply 9-24 VDC can be used to power the unit. If both battery and external power supply are connected, the battery will work as back up power.Battery InstallationThe unit is shipped with a separate 9V alkaline battery. Remove the unit’s top back cover then connect the 9V battery to the battery holder as shown in Figure 1.External Power Supply InstallationRemove the unit’s back cover then connect the external power supply to the terminal block as shown in Figure 1.Figure 1POWER MUST BE OFF WHILE WIRING CONNECTIONS ARE BEING MADE. DO NOT EXCEED SPECIFIED SUPPLY VOLTAGE RATINGS. PERMANENT DAMAGE NOT COVERED BY WARRANTY WILL RESULT.CAUTION9V BATTERYPOWER SUPPLY9 TO 24 VDCB1CONN6OPERATING INSTRUCTIONS - Key FunctionsHome Position FunctionMain Menu FunctionSub MenuFunctionMenuAllows access to the menusReturn to home positionReturn to previous menuUp ArrowDisplays pressure readings instantly (rAtE KEY MODE only)Sequences through menusIncrements a valueDown ArrowSequences through menusDecrements a valueEnterDisplays full scale range of unitEnter into SUB MENUChanges a value or setting. Press ENTER and display will blink. Adjust with UP or DOWN arrows. Press ENTER to store. Display will stop blinking.Menu MapMain Menu Programming Instructions (Upper Right Display Reads MENU)Security Menu: SECr-MENULock out access to all menus or lock out access to all menus except Auto-Zero function (Auto-ZERO).Operation Menu: OPEr-MENUSelect the measurement type – pressure, velocity or flow and corresponding engineering units (Velocity and flow are not available for Model DM-1100).Display Menu: diS-MENUMonitor and adjust display related settings: Filter type, filter point, dampening, display update, peak and valley.Advanced Menu: AdU-MENUPerform auto-zero or full-scale calibration.Security Menu: SECr-MENUWith the gage reading pressure (home position), press and hold the MENU key until the Security MENU is displayed. Press the E key to show the security SUB MENU SECr–0001. 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.The password values shown in the table cannot be altered, so retain a copy of these pages for future reference.Operation Menu: OPEr-MENUWith the gage reading a numerical value (home position), press and hold the MENU key until the Security MENU is displayed. Press the ▼ key to show the OPEr-MENU. Press the E key to show the Operation SUB MENUS.The Operation SUB MENUS are:PrES – Pressure UEL – Velocity FLO – FlowFLOr – Flow range KFAC – K Factor ArEA – AreaDIA – Diameter XDIM – X Dimension YDIM – Y Dimension 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.Note: 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 other measurement types will have a blank upper right display (see below).UEL (Velocity) SUB MENU:For velocity measurement, the following units are available:UEL-SFPM: Velocity – Standard feet per minuteUEL-M/S: Velocity – Meters per secondNote: 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.FLO (Flow) SUB MENU:For flow measurements, the following units are available:FLO – SCFM: Flow – Standard cubic feet per minuteFLO – M3H: Flow – Cubic meters per hourFLOr (Flow range) SUB MENU:The following flow ranges are available:FLOr – HI: Flow range – High: 999.9 x 1KFLOr – MED: Flow range – Medium: 99.99 x 1KFLOr – LO: Flow range – Low: 9999Security Level DisplayedAccessPassword Value to Enter123All menus accessAll menus locked except the auto-zero functionAll menus locked1090111AVAILABLE VELOCITY RANGESInput Rangein w.c.SFPM RangeM/S Range0 - 0.250 - 0.500 - 1.000 - 2.000 - 5.000 - 10.00 - 15.00 - 25.00 - 50.00 - 20020 - 28320 - 40040 - 56630 - 89540 - 12.66 x 1K0 - 15.51 x 1K0 - 20.02 x 1K0 - 28.32 x 1K0 - 10.170 - 14.390 - 20.350 - 28.770 - 45.480 - 64.330 - 78.760 - 101.70 - 143.9Table 1: FLOr = LOMaximum Duct Size (English)Rangein w.c.SFPM RangeMax Duct Size sq ft0.250.501.002.005.0010.015.025.050.09999999999999999999999999999999999994.9943.5312.4971.7661.1170.7890.6440.4990.353Table 3: FLOr = MEDMaximum Duct Size (English)Rangein w.c.SFPM RangeMax Duct Size sq ft0.250.501.002.005.0010.015.025.050.099.99x1K99.99x1K99.99x1K99.99x1K99.99x1K99.99x1K99.99x1K99.99x1K99.99x1K49.9435.3124.9717.6611.177.8986.4464.9943.530Table 5: FLOr = HIMaximum Duct Size (EnglishRangein w.c.SFPM RangeMax Duct Size sq ft0.250.501.002.005.0010.015.025.050.0999.9x1K999.9x1K999.9x1K999.9x1K999.9x1K999.9x1K999.9x1K999.9x1K999.9x1K499.4353.1249.7176.6111.778.9864.4649.9435.30Table 2: FLOr = LOMaximum Duct Size (Metric)Rangein w.c.M3/hrRangeMax Duct Size M20.250.501.002.005.0010.015.025.050.09999999999999999999999999999999999990.2730.1930.1360.0960.0610.0430.0350.0270.019Table 4: FLOr = MEDMaximum Duct Size (Metric)Rangein w.c.M3/hrRangeMax Duct Size M20.250.501.002.005.0010.015.025.050.099.99x1K99.99x1K99.99x1K99.99x1K99.99x1K99.99x1K99.99x1K99.99x1K99.99x1K2.7311.9301.3640.9650.6100.4310.3520.2730.193Table 6: FLOr = HIMaximum Duct Size (Metric)Rangein w.c.M3/hrRangeMax Duct Size M20.250.501.002.005.0010.015.025.050.0999.9x1K999.9x1K999.9x1K999.9x1K999.9x1K999.9x1K999.9x1K999.9x1K999.9x1K27.3119.3013.649.6546.1074.3173.5262.7311.931KFAC (K Factor) SUB MENU:1.00-KFAC: K Factor = 1.00K factor becomes accessible if the instrument is set for Velocity or Flow. When the DigiMag® is used with a Pitot tube, the manufacturer may specify a K factor. The adjustment range is 0.01 to 2.00. The factory setting is 1.ArEA (Area), DIA (Diameter), XDIM (X dimension) and YDIM (Y dimension) 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 1 to 6 show the input range vs. maximum flow and duct size. For a rectangular duct the maximum size is specified by the X, Y dimensions. For a circular duct the maximum size is specified by the diameter. X, Y and circular dimensions are entered in feet with 0.001 foot resolution for FLOr = LO, 0.01 foot resolution for FLOr = MED and 0.1 foot resolution 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 ductXDIM – Enter the “X” dimension of a ductYDIM – Enter the “Y” dimension of a ductDISPLAY MENU: diS – MENUWith the gage reading a numerical value (home position), press and hold the MENU key until the SECr-MENU is displayed. Press the ▼ key until the LCD shows diS – MENU. Press the E key to show the Display SUB MENUS.FILTER TYPE SETTINGWith the LCD reading FILt – OFF, press the E key; the display will blink. Press the ▼ key to change the filter type then press the E key to save the desired filter type.FILt – OFF: Filter type = OFF. The filter function is disabled.FILt – HIGH: Filter type = HIGH. The display blinks when pressure is greater than the filter point.FILt – LOW: Filter type - LOW. The display blinks when pressure is less than the filter point.FILTER POINT SETTINGWith the LCD reading 0.00 – SPPT, press the E key; the display will blink. Press the ▲ or ▼ key to change the filter point then press the E key to save the desired filter point.0.00 – SPPT: Filter point = 0.00. The filter point may be set to anywhere within the range of the instrument.DAMPING SETTINGWith the LCD reading 1 – DAMP, press the E key; the display will blink. Press the ▲ or ▼ key to change the damping level then press the E key to save the desired damping level.1 – DAMP: Damping level = 1. The damping level can be adjusted from 1 to 15. Damping stabilizes the display from instabilities due to things such as vibration and excessive pressure fluctuations. The damping function adjusts the amount of readings that are averaged for each display update.This symbol indicates waste electrical products should not be disposed of with household waste. Please recycle where facilities exist. Check with your Local Authority or retailer for recycling advice.DISPLAY UPDATE SETTINGWith the LCD reading rAtE – NORM, press the E key; the display will blink. Press the ▼ key to change the display update rate then press the E key to save the desired display update rate.rAtE – NORM: Display update = Normal (1 second).The gage reads the process pressure and updates the LCD every second.rAtE – 10: Display update = 10 minutes.The gage reads the process pressure and updates the LCD every 10 minutes.rAtE – KEY (On-Touch mode): Display update is disabled.The gage reads the process pressure and updates the LCD whenever the ▲ key is pressed. If the ▲ key is released, the LCD will hold and display the last pressure reading.NOTES:1. Depending on the Display Update setting, the battery life is shown below: -150 hours (typical) if Display Update is set for “Normal” 1 second update. rAtE-NORM -1 year (typical) if Display Update is set for 10 minutes. rAtE-10 -2 years (typical) if Display Update is disabled. rAtE-KEY2. If the Display Update is set for 10 minutes or disabled (On-Touch mode), the process pressure value can be read instantly by pressing and holding the p key on the front panel. Also the LCD will automatically show “ALAr” if the filter point has been exceeded.PEAK AND VALLEY SETTING100.0 – PEAK: Peak value = 100.0The 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 E key while in the PEAK SUB MENU.0.0 – VALY: Valley value = 0.0The valley feature stores the lowest pressure reading the instrument has measured since the last reset or power up. At power up VALY is reset to the present pressure reading. To manually reset the VALY value, press the E key while in the VALY SUB MENU.ADVANCED MENU: AdU – MENUWith the gage reading pressure (home position), press and hold the MENU key until the SECr-MENU is displayed. Press the ▼ key until the display shows the AdU – MENU. Press the E key to show the advanced function SUB MENUS.Auto ZERO: auto-zeroNote: For accurate calibration, DO NOT apply any pressure when performing this function.With the display reading Auto ZERO, release pressure to Zero then press the E key; the display will blink. Press the E key again to complete the Auto-zero.CAL – SPAN: full-scale calibrationWith the display reading CAL – SPAN, apply full-scale pressure then press the E key; the display will blink. Press the E key again to save the full-scale calibration or press the MENU key to cancel the calibration.MAINTENANCEUpon final installation of the Series DM-1200 DigiMag® Digital Differential Pressure Gage, no routine maintenance is required. A periodic check of the system is recommended. The Series DM-1200 is not field serviceable and should be returned if repair is needed (field repair should not be attempted and may void warranty). Be sure to include a brief description of the problem plus any relevant application notes. Contact customer service to receive a return good authorization number before shipping.XY3-5/64[78.27]STANDARD MOUNTING HOLEDIMENSION FOR DIGIMAG GAUGEØ4-9/16 [115.89]1[25.44]2X30°2xØ13/32 [10.32]THRU HOLES FOR PRESSURE PORTS1-51/64 [45.72]3-15/32 [88.12](3) SURFACE MOUNTINGHOLE LOCATIONS13/32 [10.16]Ø5/8 [15.88]THRU HOLE FORCONDUIT CONNECTIONOUTSIDE DIAMETEROF A-286 FLANGE1-1/4 [31.75](3) FLANGE MOUNTINGHOLE LOCATIONSØ5-17/32 [140.49]BOLT CIRCLEMOUNTING HOLE DIMENSIONFOR A-286 FLANGEØ5-1/8 [130.18]NOTES____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________Printed in U.S.A. 2/19FR# 443779-50 Rev. 4©Copyright 2019 Dwyer Instruments, Inc.DWYER INSTRUMENTS, INC.P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.Phone: 219/879-8000Fax: 219/872-9057www.dwyer-inst.come-mail: info@dwyermail.comNOTES____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________Next >