Sierra SierraTrak 625S Instruction Manual
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Sierra SierraTrak 625S Instruction Manual

Thermal mass flow meter
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SierraTrak 625S
Thermal Mass Flow Meter
Instruction Manual
Document: IM-625S
Rev B_PN 110064
831.373.0200 | 5 Harris Court Building L, Monterey, CA 93940 |
sierrainstruments.com

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  • Page 1 SierraTrak 625S Thermal Mass Flow Meter Instruction Manual Document: IM-625S Rev B_PN 110064 831.373.0200 | 5 Harris Court Building L, Monterey, CA 93940 | sierrainstruments.com...
  • Page 3 Sierra Instruments. The information contained in this manual is subject to change without notice.
  • Page 4 625S Disclaimer Warnings and Cautions General Safety Information We use caution and warning statements throughout this book to draw your attention to important information. Symbol Key Symbol Symbol Meaning Description This statement appears with information that is important to protect people and equipment from Warning damage.
  • Page 5 625S Disclaimer CAUTION • Caution! Before making adjustments to the device, verify the flow meter is not actively monitoring or reporting to any master control system. Adjustments to the electronics will cause direct changes to flow control settings. • Caution! All flow meter connections, isolation valves and fittings for hot tapping must have the same or higher pressure rating as the main pipeline.
  • Page 6 Sierra Instruments by e-mail (see inside front cover). For urgent phone support you may call (831) 373-0200 between 8:00 a.m. and 5:00 p.m. PST. In Europe, contact Sierra Instruments Europe at +31 72 5071400. In the Asia-Pacific region, contact Sierra Instruments Asia at +8621 5879 8521.

  • Page 7: Table Of Contents

    625S Table of Contents 1. Introduction p. 9-17 a. Quick Start Guide ............... . . p. 9 b.
  • Page 8 625S Table of Contents 7. Appendices p. 77-p. 84 a. Specifications ................p. 77 b.

  • Page 9: Quick Start Guide | 9

    Check the remaining flow meter settings by accessing the meter settings either through the front panel of the display or by using the SierraTrak 625S View™ software tool. Record the settings in the spaces given for items A - E on the following page.
  • Page 10 After powering on your meter, check items A - E below by accessing the meter settings either through the front panel of the meter's display or by using the SierraTrak 625S View™ software tool. Which flow units have been set in meter? (SCFM, KG/H, etc..)
  • Page 11 625S Introduction Fig. 1.1: 625S Menu Tree - Main Menu Enter menu by scrolling to display 4 and entering the password SET PARAMETERS I/O FLO DSP EXIT Display Menu, p. 15 Flow Menu 1, p. 13 SET I/O COM I/O 420 EXIT Analog Outputs SET I/O SET 4-20 mA...
  • Page 12 625S Introduction Fig. 1.2: 625S Menu Tree - Digital Outputs SET PARAMETERS I/O FLO DSP EXIT SET I/O COM I/O 420 EXIT SET I/O INP OUT EXIT Not used OUT= Not used Frequency Frequency HiFloAlm LoFloAlm HiTempAlm LoTempAlm System Alm Select 1 of 3 methods to scale High Limit Alarm...
  • Page 13 625S Introduction Fig. 1.3: 625S Menu Tree - Flow Parameter Menu 1 SET PARAMETERS I/O FLO DSP EXIT FLOW PARAMETER 1 Flow Menu 2 Menu, p. 14 DGN UNT PRM EXIT SCFM DIAGNOSTIC FLO UNT=SCFM SCFH EXIT NM3/H NM3/M KG/H KG/M KG/S TMP UNT=°...
  • Page 14 625S Introduction Fig. 1.4: 625S Menu Tree - Flow Parameter Menu 2 SET PARAMETERS I/O FLO DSP EXIT FLOW PARAMETER 1 DGN UNT PRM EXIT FLOW PARAMETER 2 SPC PRM EXIT Level 1 Parameters Flow cutoff in selected unit K fact = 0% Cutoff=12.5 SCFM A2=0.0233 Pipe Area im m2 or ft2...
  • Page 15 625S Introduction Fig. 1.5: 625S Menu Tree - Display Menu SET PARAMETERS I/O    FLO    DSP    EXIT DISPLAY/PASSWORD DSP            PSW    EXIT Display 1  Line 1 FLo rate DSP1L1=FLo rate PASSWD=1234 Total NXT                             OK CHG                            OK Elps Display 1  Temp Line 2 Alarm FLo rate DSP1L2=Temp Total NXT                             OK Elps Display 2  Temp Line 1 Alarm FLo rate DSP2L1=Alarm Total NXT                             OK Elps Display 2 ...
  • Page 16 625S Introduction Fig. 1.6: 625S Menu Tree - Engineering Screens Enter: Press F1 & F2 at the same time Press F4 to return to normal mode Flow in selected units 3124.6 SCFM Display 10 Sensor voltage in volts csv=0.3432 Volt Enter Log Menu: Press F1 & F2 at the same time Press F4 to return to normal mode Sensor average volts...
  • Page 17 Introduction Welcome Thank you for purchasing the SierraTrak 625S Thermal Gas Mass Flow Meter and Temperature Transmitter from Sierra Instruments. The 625S is an economical and easy-to-install solution for heaters and boilers to increase efficiency. Extensive engineering effort has been invested to deliver advanced features, accuracy measurement performance and outstanding reliability.
  • Page 18 The maximum frequency is 100 Hz. SierraTrak 625S View™ interfaces to the USB port and is a free Sierra PC-based software program that displays flow meter readings and permits flow meter configuration. The software is available for download on the Sierra website.

  • Page 19: General

    5. Ensure the flow direction indicator for the meter is in line with the direction of flow in the pipe. 6. Do not install the SierraTrak 625S enclosure near an igniter, igniter-controller or switching equipment. 7. Do not install an external power supply in a cabinet containing an igniter controller or switching equipment.

  • Page 20: Lateral Placement

    625S Installation Instructions for Flow Meter Lateral Placement Install the model 625S flow meter so that it is far enough away from bends in the pipe, obstructions, or changes in line sizes to ensure a consistent flow profile. See Fig. 2.1 below for your meter type. Fig.
  • Page 21 Alternate Installations - Vertical Pipes or Restricted Installation Spaces When restricted physical installation space exists, the SierraTrak 625S can also be installed at other angles. Please note that the display's orientation will remain aligned with the top of the meter. The display can be ordered in rotated orientations for better view.
  • Page 22 Installation Welding Branch Fitting to Pipe The probe of the SierraTrak 625S must be installed perpendicular in the pipe to measure flow accurately. Use the following steps to ensure that the ¾" branch fitting is correctly welded to the pipe.

  • Page 23: Installation Depth

    625S Installation Installation Depth The installation depth of the sensor in the pipe is dependent on the pipe size. To get the most accurate reading, proper placement of the sensor window within the pipe is necessary. As shown in Fig 2.5, the end of the sensor window should be 0.87" (22.1 mm) past the center line of the pipe. Review the dimensional drawing below with the following equation to calculate insertion depth: L +D/2 + .87"...
  • Page 24 625S Installation Direction of Flow and Orientation of the Probe Install the meter with the flow direction indicator pointing in the direction of flow and centered on the middle of the pipe. The rotational misalignment of the flow direction indicator must be less than 2 degrees.
  • Page 25 625S Installation Unequal Length Sensor Elements Install the shorter element upstream from the longer one. Fig. 2.7: Unequal Length Sensor Elements +2° FLOW -2° FLOW Equal Length Sensor Elements Install flow meter with both sensor elements facing the flow stream within ±2°. Fig.
  • Page 26 625S Installation Mounting Instructions - Compression Fittings The 625S is mounted through a 0.531" hole and a ¾" female NPT branch outlet in the customer's pipe. Insertion style flow meters are not designed for use in pipes smaller than 1½". •...

  • Page 27: Mounting Instructions

    625S Installation Mounting Instructions - Compression Fittings (Meters Previously Installed) In cases where a compression fitting has already been swaged, use the following procedure. • Carefully insert the probe with swaged ferrules into the fitting until the front ferrule seats against the fitting (see Figure 2.10).

  • Page 28: Wiring (Electrical)

    • An external power disconnect and 16A over-current protection are required for the DC powered 625S. • Do not install the SierraTrak 625S enclosure near an igniter, igniter-controller or switching equipment to eliminate the possibility of noise interference. • Do not install an external power supply in a cabinet containing an igniter controller or switching equipment.
  • Page 29 625S Wiring Wiring Instructions To wire the 625S connect the power and signal wires to the terminal blocks according to the label and instructions on the following pages. Fig. 3.1: 625S Wiring Access Inside Display/Cover Main Board Electronics DC POWER I/O WIRING OPTIONAL MODBUS...
  • Page 30 625S Wiring Power Input Requirements: 24VDC Supply External DC power supply must provide 24VDC ±10%, at 0.7 Amps minimum. The enclosure must be properly grounded with a quality earth ground. Sixteen (16) gauge, stranded wire, is recommended for power and earth ground. Connect the power wiring as shown in the diagram below.
  • Page 31 In the 4-20mA Failsafe Wiring configuration of Fig. 3.3, the 4-20mA signal goes to 0mA if power to the SierraTrak 625S is lost or a System Alarm occurs. Fig. 3.3: 4-20mA Failsafe Wiring and Range of 4-20mA Output for NAMUR Alarm...
  • Page 32 24VDC Return NOTE! The load resistor on the Sierra Flow Meter 4-20mA signal is typically 250 ohms and is located in or at the customers PLC or DCS. A 250 ohm resistor in the 4-20mA line will result in a 1 to 5VDC signal to the PLC or DCS. Some PLC/DCS equipment has the load resistor built in to the unit;...
  • Page 33 * (see important note below) NOTE! The load resistor on the Sierra Flow Meter 4-20mA signal is typically 250 ohms and is located in or at the customers PLC or DCS. A 250 ohm resistor in the 4-20mA line will result in a 1 to 5VDC signal to the PLC or DCS. Some PLC/DCS equipment has the load resistor built in to the unit;...
  • Page 34 6(-). The frequency/alarm output is an open collector circuit capable of sinking a maximum of 20mA of current. Frequency or alarm selection is programmed using the display or SierraTrak 625S View™. Only one option, frequency or alarm, can be active at a time.
  • Page 35 625S Wiring Frequency/Alarm Output Wiring: Local +24V Power Option Fig. 3.7: Frequency/Alarm Output Wiring: Local +24V Power Option 625S Customer PLC or DCS 2.4K to 10K OHM Frequency or Alarm Output NOTE! The 625S Frequency/Alarm output is typically used to drive digital circuitry or solid-state relays. The output of a solid state relay may, in turn, operate loads such as electromechanical relays or alarm indicators.

  • Page 36: Remote Switch

    625S Wiring Remote Switch Wiring A remote switch can be used to reset the Totalizer and elapsed time, if enabled in the programming settings. There is no polarity requirement on these connections. Use TS2 pin 10(+) and 11(-). Fig. 3.8: Switch 625S Customer PLC or DCS...

  • Page 37: Rs485 Wiring For Modbus

    625S Wiring RS485 Wiring for Modbus Wiring connections are made to terminal block TS2 for Modbus communication. The Tx/Rx+ signal connects to pin 7, Tx/Rx- connects to pin 8 and communication common to pin 9 as shown in Figure 3.9. Termination Resistor Connect a termination resistor across the receive/transmit signals of the last device on the Modbus communication line.

  • Page 38: Operation (Standard Operation)

    The USB interface is a standard feature which allows communication with a PC to monitor readings and configure settings. TrakView™, is a free application program from Sierra Instruments that connects to the USB interface and allows data monitoring, configuration setting, data logging to Excel, and an option to save and recall 625S configuration data.
  • Page 39 625S Operation Measurement Mode Display Screens In the measurement mode, there are four different display screens (display 1, 2, 3 and a prompt screen to enter the programming mode). Two display screens are user programmable (refer to Display Setup p. 48). Scrolling through the display is accomplished by pressing the F1 or F2 key to view the next or previous screen.
  • Page 40 Pressing the F1 & F2 keys at the same time in the normal mode, brings up the engineering displays. These displays show internal parameters of the 625S which are used by Sierra service technicians. Use the F1 & F2 keys to navigate. Press F4 to exit.

  • Page 41: Programming

    625S Operation Programming: Data Entry using the Display and Configuration Panel There are 2 basic types of menu entries: one for changing value or string and one for selecting from a selection list. To Change a Value or String : VALUE = 0.91234 Press CHG (F1) key to change the value, OK (F4) to accept the value.
  • Page 42 625S Operation PASWD:_ Enter the correct password, then follow the instructions for changing a value as specified on page p. 41. The default Level 1 password is “1234”. If the wrong password is entered, the message “Wrong Password” will display and then return to the programming entry screen.
  • Page 43 625S Operation 20 mA = 3500 SCFM Enter the value for the 20mA and press OK (F4) key to accept the setting. Then the following screen will display: NOTE! When the flow rate exceeds the programmed value for the 20mA set point, the analog output will stay at 20mA and an alarm code will be generated.
  • Page 44 625S Operation Fig. 4.3: Range of 4-20mA Output and NAMUR Alarm NAMUR NAMUR Working Range Alarm Alarm Normal Operation Range Range Press (F4) repeatedly until “Normal Mode” is seen briefly to exit the programming mode. NOTE! When the flow rate exceeds the programmed value for the 20mA set point, the analog output will stay at 20mA and an alarm code will be generated.
  • Page 45 625S Operation Use P/U (F1) to enter pulse per unit, U/P (F2) for unit per pulse or FEQ (F3) to enter the flow and maximum frequency to scale the pulse/alarm output. NOTE! When data is entered with any of the three described methods, the other values will be re-calculated according to the settings.
  • Page 46 NOTE! If the flow rate exceeds the maximum pulse rate (frequency), the output will stay at that maximum frequency but the SierraTrak 625S will issue an alarm code. CAUTION! Calculate the pulse rate at the maximum flow rate to ensure it does not exceed 100 Hz.
  • Page 47 625S Operation HiFloAlm=500 SCFM Enter the value for the limit by pressing CHG (F1) and then OK (F4). A value of 0 disables the alarm. NOTE! There is only one output to operate as a pulse output or an alarm output. Both cannot operate at the same time.

  • Page 48: Modbus

    625S Operation Options for serial communication are: None Modbus NOTE! Any selection other than “None” requires the communication option for the selected communication type. If enabling a communication option, see see the Communications section of this manual for operation. Display Setup There are four display screens that you can cycle through in normal operating mode (see Figure 4.2 on p.
  • Page 49 625S Operation These are the selections for the Display #1 Line #1. Selections are: Flo rate Flow rate Total Total mass or volume Elps Elapsed time Temp Temperature Alarm Error codes When the selection is correct, press OK (F4) to accept. The display will then go through the same process for all 4 lines of the 2 programmable displays (DSP1L1, DSP1L2, DSP2L1 and DSP2L2).
  • Page 50 This menu is used to set the units for flow, temperature, and pressure reference as well as the setting of reference temperature, reference pressure, and density of gas when using Lbs/time or Kg/time. These values will be set at Sierra Instruments using information supplied by the customer. These values can be changed to match a new application.
  • Page 51 625S Operation NOTE! The totalizer (total flow measured) will roll over when reaching a certain value. The maximum value is dependent on the flow units selected (see Totalizer Rollover p. 57). Flow Units Selections for flow units are: SCFM KG/M LBS/D SM3/H MSCFD (MCFD)
  • Page 52 625S Operation Pressure Units After pressing OK (F4) to accept the reference temperature, the display will prompt for the reference pressure unit selection: PRES UNT= Psia Press NXT (F1) to select next entry and OK (F4) to accept. Selections are: mmHG = Millimeters of mercury (absolute) Psia = Pounds per square inch absolute bara = Bar absolute...
  • Page 53 625S Operation Accessing Flow Parameters and Alarm Settings This is the menu used to set various flow parameter values. They are: Flow cutoff, pipe area, filter, high and low alarm for flow and temperature. NOTE! The parameters in this menu are set to the customer specifications at the factory. They should only be changed when changing the application of the flow meter.
  • Page 54 625S Operation Pipe Area To set the Pipe Area: A˄2 = 0.05672 Ft˄2 Enter the pipe area in square meters or square feet and then press OK (F4). Use square meters for metric flow unit selections and square feet for English flow unit selections. This selection is dependent on the flow unit selected (English vs metric).
  • Page 55 625S Operation FILTER = 0.8 sec Programming High and Low Alarm Settings Settings for the alarms directly follow the flow parameters for flow cutoff, pipe diameter, and filter value. These alarms can be used without the digital output assigned to the alarm. If that is the case, the alarm status will only be shown on the display, through serial communication, or TrakView.
  • Page 56 Level 2 password. Calibration parameter values are set for temperature and pressure at 0 degree C and 760 mmHg. These settings should never be changed (except by Sierra technicians at the factory). This menu is entered from the base menu and pressing FLO, PRM and CAL.
  • Page 57 Press YES (F4) and enter password to reset total and elapsed time. Press NO (F1) to cancel. NOTE! This feature is not available on non-resettable units. Totalizer Rollover The SierraTrak 625S has an automatic roll-over function. The total flow count of the SierraTrak 625S will roll over after 99,999,999,999. Except for: MSCFD:...
  • Page 58 "RESTORE DATABASE". Reset CRC If the NVRAM CRC check fails (Error Code 36), the programmed settings values will need to be verified and corrected before clearing the error. Call Sierra Instruments Customer Service if you need assistance. RESET CRC? Press YES (F1) ONLY if you want to reset the CRC and generate a new CRC value.
  • Page 59 625S Operation NOTE! Simulated values are only enabled when not set to zero. CAUTION! If the 4-20mA and/or the pulse outputs are connected to controllers, set the controllers to “manual” to ensure that the simulated signals do not cause false controller action.
  • Page 60 625S Operation Enter the value and then press OK (F4). Enter zero to disable this feature. CsvSim = 0 V Enter the CSV value and then press OK (F4). ENABLE SIM? Press YES (F1) to start the simulation mode, otherwise press NO (F4). Upon pressing either key, the program will return to the FLOW PARAMETER 1 screen.
  • Page 61 625S Communications Scope This section describes the Modbus implementation using RS485 serial communication physical layer for the 625S mass flow meter based on the Modicon Modbus Protocol (PI- MBUS-300 Rev. J). Modbus Protocol MODBUS Protocol is an application layer messaging protocol that provides client/sever communications between devices.
  • Page 62 625S Communications 625S Commands Supported The 625S supports the following commands: Command 03: Read holding registers Command 04: Read input register. Command 06: Preset single register Read Holding Registers (command 03) This command reads the basic variable from the 625S and has the following format: Request: <Meter Address>...
  • Page 63 625S Communications 625S Commands Supported by Modbus Register Modbus Data Type Scaling Comment Address Address 0x0A 40011 Flow in Eng units * 10 Mass flow in selected units * 10 0x0B 40012 Flow in Eng units *100 Mass flow in selected units * 100 0x0C 40013 Total *100...
  • Page 64 625S Communications Read Input Register (625S Status, Command 04) This command is used to report the FT2A status information. Request: <Meter Address> <Command code=04> <Register address =0> <Register address =0> <Register count =0> <Register count =1> <CRC high> <CRC low> Response: <Meter Address>...
  • Page 65 625S Communications Table 4.3: Status 2 Bits Definitions for Command 04, Modbus Address 30002 Definition Comment Not used Not used Busy Busy Not used Not used Not used Not used Not used Not used Not used Not used Preset Single Register (Command 06) This command is used to perform miscellaneous functions such as clearing the totalizer and elapsed time.
  • Page 66 625S Communications Enter the Programming Mode Press the F1 or the F2 key repeatedly, in the normal running mode, until the following screen is shown. This enters the programming mode: SET PARAMETERS? Press YES (F4) and then the following screen will prompt the user to enter the password if enabled: PASWD:_ Enter the correct password.
  • Page 67 625S Communications Communication Protocol and Parameters To program the communication parameters, press I/O (F1) key from the base menu. SET I/O EXIT Then press I/O (F1) again: SET I/O EXIT Then press COM (F1) to select communication parameters. Set Bus protocol for Modbus: Bus=Modbus Press NXT (F1) repeatedly until Modbus is selected as shown and then press OK (F4) to accept the setting.
  • Page 68 625S Communications Selections are: "115200" "76800" "57600" "38400" “19200” “9600” “4800” “2400” “1200” Parity=EVEN Press NXT (F1) repeatedly until the correct selection is shown and then press OK (F4) to accept the setting. Selections are: “NONE” “ODD” “EVEN” Address=02 Press CHG (F1) to change the address and then press OK (F4) to accept the setting. Selections are between 01 and 247.

  • Page 69: Maintenance | 69

    WARNING! TURN OFF INPUT POWER BEFORE REMOVING OR INSTALLING A CIRCUIT BOARD ASSEMBLY FROM THE ENCLOSURE. CAUTION! BE SURE POWER TO METER IS SWITCHED OFF BEFORE ATTEMPTING TO ACCESS ELECTRONICS. If there is a problem and a loose connection is not found, please contact Sierra Customer Service for technical assistance at 831-373-0200. Precauciones ¡ADVERTENCIA! ANTES DE INTENTAR CUALQUIER MANTENIMIENTO, TOME LAS PRECAUCIONES DE SEGURIDAD...
  • Page 70 VORSICHT: STELLEN SIE SICHER, DASS DER STROM AN DAS MESSGERÄT AUSGESCHALTET IST, BEVOR SIE VERSUCHEN, AUF DIE ELEKTRONIK ZUZUGREIFEN. Falls Probleme auftreten und keine lose Verbindung gefunden werden kann, wenden Sie sich bitte zwecks technischer Unterstützung an den Sierra-Kundendienst unter der Nummer 831-373-0200. Maintenance | 70...
  • Page 71 To ensure continued high accuracy of your Model SierraTrak 625S Flow Meter, Sierra Instruments provides a full NIST traceable calibration. It is recommended that the meter be returned to Sierra for a calibration check in our NIST traceable labs after two years of operation.

  • Page 72: Troubleshooting | 72

    CAUTION! The electronics and sensor supplied by Sierra Instruments are calibrated as a single precision mass flow meter. Interchanging sensors will decrease the accuracy of the flow meter. If you experience any problem with your 625S Flow meter, call Sierra Instruments Customer Service Department, Technical Assistance at 831-373-0200.
  • Page 73 2. Sensor dirty 2. Clean sensor (Refer to Maintenance section, p. 71). 3. Sensor broken 3. Return flow meter to Sierra for repair (Refer to p. 93 for shipping instructions). 4. Probe not mounted 4. Remount probe (see Installation section starting securely on p.
  • Page 74 (see Programming Flow Parameters, p. 53). This area is programmed in square feet or square meters. The Calibration Certificate delivered with the flow meter contains the area that was programmed into the flow meter at the Sierra factory. Check to ensure that this area is correct.
  • Page 75 It does not mean that the zero of the instrument is improperly set. The Sierra sensor is extremely sensitive to gas flow and can even read the small flow caused by convection. If this is an unacceptable condition, please contact Sierra Customer Service for alternatives.
  • Page 76 Velocity out of Refer to the ENGINEERING SCREENS MENU on [page] of this Manual and the calibration table Sierra calibration certificate to check CSV voltage. Compare Display 10 value range to calibration certificate CSV voltage and verify it's within range.
  • Page 77 625S Appendix Performance Specs Flow Accuracy: ±1% of reading ±0.2% of full scale 15 diameters upstream; 10 downstream Flow Repeatability: ±0.2% of full scale Flow Response Time: 0.9 seconds (one time constant) Temperature Accuracy: ±1.8° F (±1.0° C) over the range -40 to 250º F (-40 to 121º C) Minimum velocity 60 SFPM.
  • Page 78 12" (300mm) 0-19,400 0-27,900 0-30,600 NOTE! Standard conditions of air at 70°F and one atmosphere. Consult factory for other gases and for flow ranges above those listed. Contact Sierra Instruments. Input Power: 24VDC , — (±10%), 0.7 Amps (standard DC power) –...
  • Page 79 Sensor material: 316 stainless steel standard Enclosure: NEMA 4X, aluminum, dual ¾” FNPT conduit entries. Flow Meter Installation: Sierra Instruments-supplied compression fitting connects to customer-supplied ¾” female branch outlet welded to pipe. Agency Approvals CE: Approved EMC Directive; 2014/30/EU Electrical Equipment for Measurement, Control and Lab Use: EN61326-1:2013...
  • Page 80 625S Appendix Fig 6.3: Insertion Meter Dimensions (8.1) (10.0) Signal Input Wiring Power 2x 3/4 inch NPT Female 7.12 (18.1) “HH” “LL” FLOW Table 6.3: Insertion Meter with 316 stainless steel probe Probe Size Probe Size Dimension “LL” ± .10 Dimension “HH” ± .10 [model code] [inches] [inches / millimeters]...
  • Page 81 Limited Warranty Policy- Register Online All Sierra products are warranted to be free from defects in material and workmanship and will be repaired or replaced at no charge to Buyer, provided return or rejection of product is made within a reasonable period but no longer than one (1) year for calibration and non-calibration defects, from date of delivery.
  • Page 82 Appendix Pack your instrument carefully. Use the original packaging and foam or bubble wrap (packing peanuts NOT recommended) and include a copy of the RMA form (complete with Sierra supplied RMA number) with the unit(s). NOTE: Probe and electronics with matching serial numbers must both be included in your return...
  • Page 83 625S Appendix Glossary of Terms and Definitions American Wire Gauge Normal Liter Bara Bar absolute NLPH Normal Liter per Hour Contact NLPM Normal Liter per Minute Calibration Normal cubic Meter Change NM3/H Normal cubic Meter per Hour Communication NM3/M Normal cubic Meter per Minute Current Sense Voltage National Pipe Thread Direct Current...
  • Page 84 625S Appendix Index Access to Electronics, p. 29 Programming Alarm Codes, p. 76 Analog 4-20mA Output, p. 42 Alarm wiring, p. 35 Alarm Output, p. 46 Analog 4-20mA output, p. 42 Changing values or strings, p. 41 Breakage or Damage of Probe, p. 71 Display Setup, p.
  • Page 85 625S Appendix Appendix | 85...
  • Page 86 Indicates compliance with the WEEE Directive. Please dispose of the product in accordance with local regulations and conventions. Indicates compliance with the applicable European Union Directives for Safety and EMC (Electromagnetic Compatibility Directive 2014/30/EU). Sierra Instruments We Understand Flow is Tough. 5 Harris Court, Building L Monterey, CA 93940 We can solve this together.

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