Page 3 - Flashing Error Message
Table of Contents Page Installation 5 Plumbing 5 Mounting 5 Application 5 Power and Signal Connections 6 RS-232 Digital Output Signal 7 Standard Voltage (0-5 Vdc) Output Signal 7 Optional 0-10 Vdc Output Signal 7 Optional Current (4-20 mA) Output Signal 7 Optional 2nd Analog Output Signal 7 M Series...
Page 5 - Installation; Plumbing; always clean any tape or debris from the port threads.; Mounting; the mounting holes are shown on pages 33-35.; Application; solid-state differential pressure transducer.
5 Thank you for purchasing an Apex Gas Flow Meter. Please take the time to find and read the information contained in this manual. This will help to ensure that you get the best possible service from your instrument. This manual covers the following Apex instruments: M Series 16 Bit Mass Gas Flow Me...
Page 7 - RS-232 Digital Output Signal; range. Ground for this signal is common on Pin 8.; Optional 0-10 Vdc Output Signal
7 RS-232 Digital Output Signal If you will be using the RS-232 output signal, it is necessary to connect the RS-232 Output Signal (Pin 5), the RS-232 Input Signal (Pin 3), and Ground (Pin 8) to your computer serial port as shown in Figure 2. Adapter cables are available from the manufacturer or they...
Page 9 - communications and signals)
9 An optional industrial connector is also available: 1 6 5 4 3 2 Pin Function Cable Color 1 Power In ( + ) Red 2 RS-232 Output Blue 3 RS-232 Input Signal White 4 Remote Tare (Ground to Tare) Green 5 Ground (commom for power, communications and signals) Black 6 Signal Out (Voltage or Current as orde...
Page 10 - M Series Mass Flow Meter Operation; Main Mode; parameters are displayed in the main mode as shown in Figure 6.; Tare; conditions than to give it a false zero under line pressure.
10 M Series Mass Flow Meter Operation The M Series Mass Flow Meter provides a multitude of useful flow data in one simple, rugged device. The M Series can have several display “modes” depending on how the device is ordered. All M Series meters have a default Main Mode, Select Menu Mode, a Gas Select...
Page 11 - Flashing Error Message:
11 Gas Absolute Pressure: The M Series flow meters utilize an absolute pressure sensor to measure the line pressure of the gas flow being monitored. This sensor references hard vacuum and accurately reads line pressure both above and below local atmospheric pressure. This parameter is located in the...
Page 12 - Select Menu Mode; If your; Gas Select Mode; display. The display will appear as shown in Figure 8 below.
12 Select Menu Mode Pushing “Mode” once will bring up the “Select Menu” display. Push the button nearest your selection to go to the corresponding display. Push “Mode” again to return to the Main Mode display. ( Note: If your meter was ordered with Totalizing Mode option (page 36), pushing the “Mode...
Page 13 - Communication Select Mode; Select Main; Figure 9. Communication Select Display; Unit ID; below). This identifier allows the user; Baud
13 Communication Select Mode The Communication Select mode is accessed by pressing the button below “Comm. RS-232” on the Select Menu display. The screen will appear as shown in Figure 9 below. Select Main > Unit ID ( A ) .....A Baud ( 19200 ) ....19200 Data Rate......Fast Comm. UP DOWN RS-232 Fi...
Page 14 - Manufacturer Data; date of manufacture.; Main; Figure 10. Manufacturer Data Displays
14 Manufacturer Data “Manufacturer Data” is accessed by pressing the “Mfg. Data” button on the Select Menu display (Figure 7). The “Mfg 1” display shows the name and telephone number of the manufacturer. The“Mfg 2” display shows important information about your flow meter including the model number,...
Page 15 - V Series Volumetric Flow Meter Operation; selected is shown directly under the flow units.; Figure 11. Main Mode Display, V Series Flow Meter; initial tare, give the unit a minute or so to warm up and re-zero it.
15 V Series Volumetric Flow Meter Operation The V Series can have several display “modes” depending on how the device is ordered. All V Series meters have a default Main Mode,a Select Menu Mode, a Gas Select Mode (the Gas Select Mode may not be available on meters calibrated for a custom gas or blen...
Page 16 - Flashing Error Message:; RS-232 Output and Input; Configuring HyperTerminal®:; all Microsoft Windows operating systems).
16 Flashing Error Message: Our volumetric flow meters and controllers display an error message (VOV = volumetric overrange) when a measured parameter exceeds the range of the sensors in the device. When any item flashes on the display, the flashing parameter is not accurate. Reducing the value of th...
Page 17 - Changing From Streaming to Polling Mode:; able to poll the unit.
17 to the screen, hit the “Enter” key several times to clear any extraneous information. Type “*@=@” followed by “Enter” (or using the RS-232 communcation select menu, select @ as identifier and exit the screen). If data still does not appear, check all the connections and com port assignments. Chan...
Page 20 - Sending a Simple Script File to HyperTerminal®; Set the cap lock on so that you are typing in capital letters.; Text; Browse and select the text “script” file you created.
20 Sending a Simple Script File to HyperTerminal® It is sometimes desirable to capture data for an extended period of time. Standard streaming mode information is useful for short term events, however, when capturing data for an extended period of time, the amount of data and thus the file size can ...
Page 21 - Operating Principle; in a viscosity that is somewhat different than pure methane.
21 Operating Principle All M or V Series Gas Flow Meters are based on the accurate measurement of volumetric flow. The volumetric flow rate is determined by creating a pressure drop across a unique internal restriction, known as a Laminar Flow Element (LFE), and measuring differential pressure acros...
Page 24 - Refer to the calibration sheet to confirm the reference point.
24 This reduces to: Pa V a / Z a Ta = P s V s / Z s Ts , eliminating R and n. Our mass flow meters model gas flows based upon the non-ideal gas characteristics of the calibrated gas. The flow corrections are normally made to 25 C and 14.696 PSIA and the compressibility factor of the gas under those ...
Page 25 - Gas Viscosities, Densities and Compressibilities at 25
25 Gas Number Short Form Long Form Viscosity* 25 deg C 14.696 PSIA Density** 25 deg C 14.696 PSIA Compressibility 25 deg C 14.696 PSIA 0 Air Air 184.918 1.1840 0.9997 1 Ar Argon 225.593 1.6339 0.9994 2 CH4 Methane 111.852 0.6569 0.9982 3 CO Carbon Monoxide 176.473 1.1453 0.9997 4 CO2 Carbon Dioxide ...
Page 26 - Gas Viscosities, Densities and Compressibilities at 0
26 Gas Number Short Form Long Form Viscosity* 0 deg C 14.696 PSIA Density** 0 deg C 14.696 PSIA Compressibility 0 deg C 14.696 PSIA 0 Air Air 172.588 1.2927 0.9994 1 Ar Argon 209.566 1.7840 0.9991 2 CH4 Methane 103.657 0.7175 0.9976 3 CO Carbon Monoxide 165.130 1.2505 0.9994 4 CO2 Carbon Dioxide 137...
Page 27 - Volumetric Flow Meters Under Pressure; This is
27 Volumetric Flow Meters Under Pressure V Series Volumetric Flow Meters are intended for use in low pressure applications. This is because an accurate measurement of the volumetric flow rate by means of differential pressure requires the flow at the differential pressure sensor to be in a laminar s...
Page 28 - TROUBLESHOOTING; Display does not come on or is weak.
28 TROUBLESHOOTING Display does not come on or is weak. Check power and ground connections. Flow reading is approximately fixed either near zero or near full scale regardless of actual line flow. Differential pressure sensor may be damaged. Avoid installations that can subject sensor to pressure dro...
Page 29 - Maintenance and Recalibration; Apex Vacuum; Warranty
29 Slower response than specified. M or V Series meters feature an RS-232 programmable Geometric Running Average (GRA). Depending on the full scale range of the meter, it may have the GRA set to enhance the stability/readability of the display, which would result in slower perceived response time. I...
Page 30 - Specification; Technical Data for Micro Flow Mass & Volumetric Flow Meters; Mechanical Specifications
30 Specification Mass Meter Volumetric Meter Description Accuracy ± 0.8% of Reading ±0.2% of Full Scale At calibration conditions after tare High Accuracy Option ± 0.4% of Reading ±0.2% of Full Scale At calibration conditions after tare Repeatability ± 0.2% Full Scale Operating Range 1% to 100% Full...
Page 31 - Technical Data for Low Flow Mass & Volumetric Flow Meters
31 Specification Mass Meter Volumetric Meter Description Accuracy ± 0.8% of Reading ±0.2% of Full Scale At calibration conditions after tare High Accuracy Option ± 0.4% of Reading ±0.2% of Full Scale At calibration conditions after tare Repeatability ± 0.2% Full Scale Operating Range 1% to 100% Full...
Page 33 - Technical Data for High Flow Mass & Volumetric Flow Meters
33 Specification Mass Meter Volumetric Meter Description Accuracy ± 0.8% of Reading ±0.2% of Full Scale At calibration conditions after tare High Accuracy Option ± 0.4% of Reading ±0.2% of Full Scale At calibration conditions after tare Repeatability ± 0.2% Full Scale Operating Range 1% to 100% Full...
Page 37 - Option: Totalizing Mode; over it reads “Total”.; Counter; maximum count is reached. The following options may be specified:
37 Option: Totalizing Mode M or V Series Flow Meters and Controllers can be purchased with the Totalizing Mode option. This option adds an additional mode screen that displays the total flow (normally in the units of the main flow screen) that has passed through the meter or controller since the las...
Page 38 - Option: 9 Volt Battery Pack; The Battery; Remove the 9V battery, pulling the top of the battery out first.
38 Option: 9 Volt Battery Pack A Battery Pack that uses a common 9 Volt battery can be mounted to the top of your M or V Series Flow Meter. Power is passed from the battery to the flow meter through the 8 pin Mini-DIN connector. Output signals from the flow meter or pressure guage are passed through...
Page 39 - Battery Pack Installation/Removal; Battery Pack Installation and Removal:; into the socket until they are screwed into place.
39 Wrench Access Hole Wrench Access Hole 3/32 Hex Wrench Trapped Mounting Screw Trapped Mounting Screw 8 Pin Mini DIN Plug 9 volt battery Back of Meter Battery Pack Installation/Removal Battery Pack Installation and Removal: The battery must be removed before the battery pack can be installed or rem...
Page 40 - Accessories; Pin Male Mini-DIN connector cable, single ended, 25 foot length
40 CCM CCH LPM LPH CFM CFH CFH 0.0021 0.00003 2.1189 0.035 60.0 1.0 CFM 0.000035 0.0000005 0.035 0.00059 1.0 0.0166 LPH 0.06 0.001 60.0 1.0 1699.0 28.316 LPM 0.001 0.000017 1.0 0.0166 28.316 0.4719 CCH 60.0 1.0 60000.0 1000.0 1699011.0 28317.0 CCM 1.0 0.0167 1000.0 16.667 28317.0 471.947 Flow Conver...
Page 41 - Calibration Certificate
41 Serial Number: ____________________________ Model Number: ____________________________ Calibration Certificate (Store device calibration certificate in the pocket below.)
