350 HANDHELD MANOMETER OPERATING INSTRUCTIONS
Contents
1. editing in the Program Mode The backspace function takes the user out of a programmable register without changing the previous setting Pressing this key repeatedly will return the user to the Measure Mode and then shut off the manometer MIN MAX amp UP ARROW KEY In the Measure Mode activates the Min Max function of the manometer When activated the the minimum value is displayed on the upper left of the display and the maximum value on the upper right Min Max values on the display are updated every 0 1 seconds This key also deactivates this function Up arrow key is used to scroll through the programmable registers when the unit is in the Program Mode Once a programmable register is selected the up arrow can be used to edit that register HOLD amp DOWN ARROW KEY In the Measure Mode activates and deactivates the display Hold function This is designed to freeze a value being displayed If the MIN MAX function is activated those values are also frozen With HOLD activated the letter H appears in the lower left of the display Down arrow function is used to scroll through programmable registers with the unit in the Program Mode Once a programmable register is selected the down arrow can be used to edit that register PRGM amp ENTER KEY Puts the manometer into the Program Mode from mm the Measure Mode When in the Program Mode pressing this key selects the programmable BS register to be edited A2. Media Compatibility Non isolated sensors for use with clean dry non corrosive gases only Isolated sensors for all fluids compatible with 316SS Pressure Limits 2 x range on GI and AI units 2 x range on DN units when pressurized on high side only 150 PSI 10 5 Kg cm static when applied to both sides of sensor simultaneously Connection 1 8 female NPT 316SS AI and GI models have pressure port only P1 DN models have 2 pressure ports P1 is the high pressure connection and P2 the low pressure connection Power 9 volt battery lithium or alkaline field replaceable Lithium is recommended for operation below 32 F 0 C Display 5 significant digit LCD Enclosure 14 oz ABS plastic 6 5 x 3 6 x 2 25 CSA units Intrinsically safe for Class 1 Groups A B C and D 13 XX XXX X XXXX X XXXX X XXXX XX XXX XX XXX X XXXX XX XXX X XXXX XX XXX X XXXX 8H 0002 XX XXX X XXXX X XXXX X XXXX XX XXX XX XXX X XXXX XX XXX X XXXX XX XXX X XXXX SH 06 X XXXX XXXXX XXXXX XXXXX X XXXX X XXXX XXXXX X XXXX XXXXX X XXXX XXXXX ISd 0007 XX XXX X XXXX X XXXX X XXXX XX XXX XX XXX X XXXX XX XXX X XXXX XX XXX X XXXX ISd 007 XXX XX XX XXX XX XXX XX XXX XXX XX XXX XX XX XXX XXX XX XX XXX XXX XX XX XXX ISd 02 NOILN10S3Y X XXXX X XXXX XXXXX XXXXX Xx XXXX xX XXXX xX XXXX Xx XXXXK Xx XXXXK Xx XXXXK Xx XXXX OM 0006 XX XXX XX XXX XX XXX XX XX
3. correct press backspace key If editing is desired proceed to step 11 9 Press up arrow key two times 10 Press the PRGM key 11 Press the or down arrow keys to set correct alpha numeric value 12 Press right arrow gt to accept entry 13 Repeat steps 11 and 12 until the desired Header is shown 14 If an error is noted press the back arrow key until cursor is over the incorrect value Follow step 11 to correct Press the right gt arrow to advance the cursor without changing values 14 When header is complete press the PRGM key to advance cursor to end of bottom line 15 Press the PRGM key 16 Press down arrow key 17 Press the PRGM key Top line reads PROGRAM MODE Bottom reads USER INFO SELECT Bottom line reads EXIT Returns to Measure Mode Displays a number between 0 and 9 a letter from A to Z or a blank space Cursor advances one space to right Cursor flashes at bottom right Top line reads PROGRAM MODE bottom reads UNITS SELECT Bottom line reads EXIT Returns to Measure Mode 11 CONTRAST SELECT The Contrast Select register character contrast of the LC allows the user to adjust the D display to provide the best visibility for the ambient conditions If during the contrast adjustment an error is made pressing the backspace key returns the display to the previous contrast setti
4. File No 350 440 2 350 HANDHELD MANOMETER OPERATING INSTRUCTIONS Meriam s 350 Handheld Smart Manometer is a microprocessor based pressure sensing device that can be used to directly measure pressure Differential pressure units clean dry gases only can also measure flow when used with a square root type a aa 88 primary flow element Models are 6 6 available to measure gauge v absolute differential and vacuum pressure in ranges from 20 w c to 2000 PSIG Pressure can be displayed in a variety of engineering units SMART MANOMETER 1525 aso sents TABLE OF CONTENTS Subject Page Keypad functions 2 Pressure zeroing the manometer 3 Program mode 4 Units select 4 User unit select Flow unit select oF Damp rate select Auto shut off User info select Contrast select Specifications Resolution Changing the battery Recalibration KEYPAD FUNCTIONS ON OFF amp BACKSPACE KEY Turns the manometer on into the Measure Mode 0 and then turns the unit off from the Measure ON Mode Also serves as a backspace key when
5. Mode operation The configurable registers that are found in the Program Mode are Units Select Damp Rate Select User Info Select Contrast Select and Exit The manometer can be put into the Program Mode at any time during Measure Mode operation by pressing the PRGM key The top line of the display will read PROGRAM MODE The bottom line will read UNITS SELECT Press the up or down arrow keys to scroll through the Program Mode to the desired register UNITS SELECT The standard engineering units available on the Smart Manometer are PSI Inches of Water at 20 Celsius Inches of Water at 60 Fahrenheit Inches of Water at 4 Celsius Kg cm Kilopascals Millibars Bars Centimeters of Water at 20 Celsius 10 Inches of Mercury at 0 Celsius 11 Millimeters of Mercury at 0 Celsius 12 User unit select see page 5 13 Flow units see page 7 To change engineering unit of measure the manometer should be ON and in the Measure Mode Then follow the following steps WCHNIDAKRWNE Keystroke Display 1 Press PRGM key Top line reads PROGRAM MODE and bottom line reads UNITS SELECT 2 Press PRGM key Top line reads UNITS SELECT and bottom shows current engineering units 3 Press or down arrow key until desired engineering unit is displayed 4 Press the PRGM key to select engineering unit 5 Press the down arrow key 6 Press PRGM key En
6. X XX XXX XX XXX XX XXX XX XXX XX XXX XX XXX XX XXX OM 006 XXX XX XXX XX XXX XX XXX XX XXX XX XXX XX XXX XX XXX XX XXX XX XXX XX XXX XX OM 06 ISd 2 07 OHU 4 09 07HU Dov OHU 709 3 td wg 07H wo 3H ul 3H wu 14 CHANGING THE BATTERY The manometer is powered by one 9 volt battery When the output of the battery under load drops below 6 5 volts the display will alternate between LOW POWER DETECT and REPLACE BATTERY To replace the battery locate the battery compartment in the bottom rear of the manometer Push down on the small rectangular area in the battery cover While pushing the cover down slide the cover out the bottom of the unit Pull the battery connector off the battery terminals Plug the new battery into the connector and install in the compartment Slide the battery cover on until the locking clip goes into the manometer housing and the channels on the bottom of the cover are locked in place RECALIBRATION The Smart Manometer s accuracy can be verified by using a 0 015 of reading deadweight tester It is recommended that the manometer be checked at a minimum of four test points at 25 50 75 and 100 of the units range A full ten point evaluation provides the most complete information on the manometers performance Before performing the evaluation there are several corrections to the deadweight tester that may have to be made 1 Use the User Unit Selec
7. alibration The Smart Manometer cannot be recalibrated in the field If recalibration is required contact the Meriam Instrument representative in your area or call the factory at the numbers listed below for a Return Material Authorization RMA number All Smart Manometers recalibrated at the factory are returned with certificates of NIST traceability Manufacturer Meriam Process Technologies 10920 Madison Ave Cleveland OH 44102 USA Ph 216 281 1100 FAX 216 281 0228 Distributor Tetra Tec Instruments GmbH Gewerbestrasse 8 71144 Steinenbronn Germany Tel 07157 5387 0 Fax 07157 5387 10 16
8. easure Mode USER INFO SELECT The User Info Select register is designed to provide the user with information on the hardware and software in the manometer This register stores information on the sensor s serial number software version date of last calibration Auto Shut Off status and the instrument Start Up Header The Start Up Header appears whenever the manometer is turned on Below the Header is the Full Scale of the manometer in the last engineering units programmed The factory setting of the header is MERIAM INSTR This can be edited to show a custom alpha numeric string as required by the user To configure the Unit Info Select register follow the keystrokes listed below Keystroke Display 1 From the Measure Top line reads PROGRAM Mode press the PRGM MODE Bottom line reads key UNITS SELECT 2 Press the arrow key Bottom line changes to two times USER INFO SELECT 3 Press the PRGM key Bottom line shows serial number 4 Press the PRGM key Software version number shown 5 Press the PRGM key Calibration Date shown 6 Press the PRGM key Top line reads AUTO SHUT OFF bottom line reads ENTER TO SELECT 7 Instructions for setting Top line reads HEADER the AUTO SHUT OFF NAME bottom line reads are on page 9 Press up MERIAM INSTR Cursor Tarrow key to proceed flashes at bottom left to editing the Header 10 8 If header is
9. ess the up or down arrow keys to display the correct value 8 Press the PRGM key until the display changes see Note on pg 7 9 Press the PRGM key 10 Follow steps 4 6 above to enter FT H20 11 Press PRGM key 12 Press down arrow key 13 Press PRGM key Top line reads USER UNIT VALUE Bottom line reads 20000000 new units Cursor flashes to the right of 2 Numbers 0 9 decimal point or a blank space can be displayed Bottom line reads 2 30894 Last digit 4 is blinking Top line reads VALUE Bottom line reads CHANGE YES Top line reads USER UNIT NAME Bottom line reads FT H20 A Z 0 9 decimal point or a blank space can be displayed Top Line reads PROGRAM MODE and bottom line reads UNITS SELECT Bottom line reads EXIT Manometer returns to Measure Mode Display shows FT H20 Note If at steps 2 and 8 the VALUE is the desired value or description press the up or down key This will toggle the bottom line from the default CHANGE YES to CHANGE NO Follow steps 11 13 on page 6 to return to the Measure Mode FLow UNIT SELECT Differential Pressure Smart Manometers can be programmed to read out in flow measurement units such as CFM or Lit min This use is limited to clean dry non corrosive gases The primary element has to be a differential pressure prod
10. fter the register has been edited pressing the PRGM key enters the new setting into the manometer s non volatile memory This key also acts as a forward space gt key when editing user input such as the header name PRESSURE ZEROING THE MANOMETER Prior to making a pressure measurement the 350 Smart Manometer should be zeroed for pressure This will eliminate any zero drift that has occurred since the manometer was last used To zero the manometer starting with the unit turned off follow this key stroke sequence Keystroke Display 1 Press ON OFF button The display briefly shows the header name and full scale range of the unit in the last engineering units selected The manometer then goes into the Measure Mode where the applied pressure and engineering unit of measure are displayed Display should read close to 2 Turn off pressure zero See note below sources and vent pressure ports to atmosphere Top line of display reads 3 Press MIN MAX and ZERO IN PROGRESS HOLD keys at the same while bottom line counts time See figure 1 down from 9 Zeroing is complete when unit returns to Measure Mode Note All Models and ranges can be zeroed only if the new Zero is within 5 of the original factory calibration zero If outside this limit a ZERO ERROR message appears and the manometer will not zero PROGRAM MODE The Program Mode is used to configure the manometer for Measure
11. gineering units on bottom line of display change Top line reads PROGRAM MODE and bottom line reads UNITS SELECT Bottom line reads EXIT Display returns to Measure Mode in new engineering units USER UNIT SELECT Engineering units not included in the standard selection can be programmed into the manometer using the Units Select register in the Program Mode This is done by an internal microprocessor that multiplies the applied pressure in the base factory calibration units by the value in the user unit register For example 1 PSI equals 2 30894 Feet of Water at 60 F A 20 PSI manometer can be programmed to read out in Feet of Water using the following steps Keystroke 1 Follow steps 1 3 in Units Select pg 4 until USER UNIT SELECT is displayed 2 Press PRGM key see Note on pg 7 3 To change the value press the PRGM key Display Reads USER UNIT SELECT on the bottom line Reads VALUE on the top line and CHANGE YES on the bottom line Top line reads USER UNIT VALUE 4 Press the arrow key until the first digit reads 2 5 Press the right arrow gt key to enter this value and advance the cursor to the next digit 6 Repeat steps 4 and 5 until the bottom line of the display reads 2 30894 7 If an error is made use the back space key to move the cursor back to the incorrect digit Pr
12. ng To adjust the contrast follow thi e keystrokes below Keystroke From the Measure Mode press the PRGM key Press the up arrow key three times ww Press the PRGM key Press up or down arrow keys to increase or decrease the contrast value A low number gives maximum contrast and a high number gives minimum contrast Press the PRGM key Press down arrow key Press the PRGM key Display Top line reads PROGRAM MODE bottom reads UNITS SELECT Bottom line reads CONTRAST SELECT Top line reads CONTRAST SELECT bottom line shows a numerical value LCD lightens or darkens depending on value set Top line reads PROGRAM MODE bottom reads UNITS SELECT Bottom line reads EXIT Returns to Measure Mode 12 SPECIFICATIONS Type and Range DN Differential Non Isolated 20 200 2000 H20 GI Gauge Isolated 20 PSI 200 PSI 2000 PSI AI Absolute Isolated 900 2000 mm Hg Accuracy 350 Test Gauge 0 05 of Full Scale 351 Calibrator 0 025 of Full Scale 5 C to 50 C 0 05 of Full Scale 20 C to 5 C DN0020 versions have only 0 1 of Full Scale Includes the combined effects of temperature linearity repeatability hysteresis and resolution NIST certification supplied with manometer Temperature Storage 40 F to 140 F 40 C to 60 C Operating 4 F to 122 F 20 C to 50 C
13. ode UNITS SELECT 2 Press the up arrow Bottom line reads DAMP key RATE SELECT 3 Press the PRGM key Top line reads DAMP RATE SELECT 4 Press the up or down Bottom line shows damp arrow keys until the rate in seconds desired damp rate is displayed on bottom line 5 Press the PRGM key Top line reads PROGRAM MODE bottom line reads UNITS SELECT 6 Press the down arrow Bottom line reads EXIT key 7 Press the PRGM key Returns to Measure Mode AUTO SHUT OFF Enabling the Auto Shut Off feature allows the manometer to turn itself off after approximately ten minutes of keypad inactivity Disabling this feature limits the manometer to being turned off by using the ON OFF key only Units are shipped from the factory with the Auto Shut Off enabled To configure the auto shut off follow the steps below Keystroke Follow steps 1 7 on page 10 2 Press the PRGM key 3 Press the or down arrow keys 4 Press the PRGM key 5 If Header needs to be edited follow steps 11 17 on pages 11 6 If header is correct follow steps 8 10 on page 11 Display Top line reads AUTO SHUT OFF bottom reads ENTER TO SELECT Bottom line reads ENABLED or DISABLED Auto Shut Off status on bottom line changes Top line reads HEADER NAME bottom line shows header Changes Header and returns to Measure Mode Returns to M
14. t option in Program Mode to match the Smart Manometer units to the deadweight tester units Be sure to match the Smart Manometer temperature reference to the temperature reference of the deadweight tester for in H O and Hg units only 2 Correct the deadweight tester readings for ambient temperature if it is different from the reference temperature The Smart Manometer does this automatically 15 3 The local gravity at location where the evaluation is being performed must be corrected for on the deadweight tester Standard gravity reference is 980 665 cm sec sec This gravity occurs at 45 north latitude at sea level 4 Make sure there are no leaks in the system The 200 and 2000 in H2O Smart Manometers have a calibration reference of inches of water at 20 C The 2000 mm Hg absolute manometer references mercury at 0 C The 20 200 and 2000 PSI manometers are calibrated in PSI and therefore do not have a reference temperature The effects of local gravity on the Smart Manometer are corrected for by zeroing the manometer see pg 3 before the evaluation This evaluation will confirm whether the manometer is or is not operating within its accuracy specification at the temperature that the evaluation was performed at only This does not guarantee that the manometer is within it s accuracy specification at other temperatures If the manometer is outside of it s accuracy limits it must be returned to the factory for rec
15. ucing square root type device such as a pitot tube orifice plate or venturi The flow constant and flow units description are programmed into the manometer using the same keystrokes used in User Unit Select programming At step 1 choose Flow Unit Select instead of User Unit Select The formula used in calculating the flow rate is Fe Q DP Where Q Flow rate F Flow constant DP Differential Pressure in H20 at 20 C Example If the DP is 25 in H2O when the flow rate is 10 000 SCFM the Flow constant equals 2 000 Damp RATE SELECT Adjustable damping is available to steady the display when measuring pulsating pressure or flow The Smart Manometer has a range of damping rates of 0 1 0 2 0 5 1 2 5 10 and 25 seconds Damping is done by averaging new data from the pressure sensor against previously collected data The microprocessor collects data from the sensor every 0 1 seconds The display updates every 0 5 seconds showing the current 0 1 second pressure reading When set at 25 seconds the display updates every 0 5 seconds with the average of the previous 25 seconds readings Therefore it takes up to 25 seconds from the time pressure is applied until the manometer displays the full scale applied pressure Min Max display updates every 0 1 seconds To set the damp rate Keystroke Display Follow steps on page 4 to Top line reads PROGRAM put the unit in Program MODE bottom line reads M
Download Pdf Manuals
Related Search