AMI 1700 Installation, Operation And Maintenance Instructions
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AMI 1700 Installation, Operation And Maintenance Instructions

Liquid level instrument (liquid nitrogen version)
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EXCELLENCE IN MAGNETICS AND CRYOGENICS
1 Cover Page
MODEL 1700
LIQUID LEVEL INSTRUMENT
(LIQUID NITROGEN VERSION)
INSTALLATION, OPERATION, AND
MAINTENANCE INSTRUCTIONS
American Magnetics, Inc.
P.O. Box 2509, 112 Flint Road, Oak Ridge, TN 37831-2509, Tel: 865-482-1056, Fax: 865-482-5472
Revision 2; 3 August 2016

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  • Page 1 EXCELLENCE IN MAGNETICS AND CRYOGENICS 1 Cover Page MODEL 1700 LIQUID LEVEL INSTRUMENT (LIQUID NITROGEN VERSION) INSTALLATION, OPERATION, AND MAINTENANCE INSTRUCTIONS American Magnetics, Inc. P.O. Box 2509, 112 Flint Road, Oak Ridge, TN 37831-2509, Tel: 865-482-1056, Fax: 865-482-5472 Revision 2; 3 August 2016...
  • Page 2 Revision 2; 3 August 2016...

  • Page 3: Table Of Contents

    1.1.9 Analog Outputs ..................4 1.1.10 Signal Relays..................4 1.1.11 Connectivity ................... 4 Model 1700 Front Panel Layout ................. 6 Model 1700 Rear Panel Layout ................6 Model 1700 Specifications @ 25°C..............7 Installation ....................11 Unpacking and Inspecting the Instrument ............11 Mounting the Model 1700 Instrument ..............

  • Page 4: Table Of Contents

    2.5.1 Autofill System Description..............14 2.5.2 Autofill System Setup ................16 Power Requirements ..................17 Operation ......................19 Energizing the Model 1700 Instrument............. 19 Screen Navigation ..................... 19 3.2.1 Home Screen Footer................19 Navigating the Instrument Menus ..............20 3.3.1 Menu Overview..................20 3.3.2...
  • Page 5 Table of Contents 3.10.1 Capacitance Sensor Contamination ............. 34 3.10.2 Resetting the Instrument to Factory Defaults ........35 3.11 Shutting the Instrument Down ................36 Calibration....................37 Setting the System Date and Time ..............37 Capacitance-based Level Calibration..............38 4.2.1 Understanding the Sensor Active Length ..........
  • Page 6 Table of Contents Battery Replacement ..................80 6.3.1 Tools Required ..................80 6.3.2 Procedure....................80 Fuse Replacement ..................... 81 6.4.1 Tools Required ..................81 6.4.2 Procedure....................81 Appendix.......................83 A.1 Connector Wiring....................83 A.1.1 Serial (RS-232) Connector..............83 A.1.2 Ethernet Connector................84 A.1.3 Aux I/O Connector................

  • Page 7: List Of Figures

    Figure 1-2 Model 1700 Instrument using external oscillator/transmitter3 Figure 1-3 Model 1700 Nitrogen Instrument Via Web Browser....5 Figure 1-4 Model 1700 Front View; Dual Channel Instrument Shown ... 6 Figure 2-1 Model 1700 Instrument in an Autofill configuration .... 15 Figure 2-1 Typical Autofill Setup .............
  • Page 8 List of Figures Figure 4-5 Typical Capacitance-based Liquid Level Sensor ....39 Figure 4-6 Dielectric vs. pressure for nitrogen under saturated conditions. Figure 4-7 Calibration method selection diagram........43 Figure 4-8 MENU Selection Button ............44 Figure 4-9 SENSORS Selection Button ............44 Figure 4-10 NITROGEN OSCILLATOR Selection........44 Figure 4-11 CALIBRATE NITROGEN Selection Button......45 Figure 4-12 SENSOR ACTIVE LENGTH field ..........45 Figure 4-13 Footer BACK Button Selection..........45...
  • Page 9 List of Figures Figure A-3 Aux I/O Connector ..............85 Rev 2...
  • Page 10 List of Figures viii Rev 2...

  • Page 11: List Of Tables

    Model 1700 Instrument Home Screen Footer......20 Table 3-2 Model 1700 Nitrogen Instrument Menu Structure ....21 Table 3-3 Model 1700 Instrument Footer during editing a field... 25 Table 3-4 Autofill Settings ..............32 Table A-1 Serial (RS-232) Pin Definitions ..........83 Table A-2 Ethernet RJ-45 Connector Pin Definitions ......
  • Page 12 List of Tables Rev 2...

  • Page 13: Foreword

    Contents of this Manual Introduction describes the functions, specifications, and characteristics of the Model 1700 Instrument. It provides illustrations of the front and rear panel layouts as well as documenting the performance specifications. Additional information is provided in the form of system block diagrams.

  • Page 14: General Precautions

    Foreword General Precautions General Precautions Cryogen Safety The two most common cryogenic liquids used in superconducting magnet systems are nitrogen and helium. Both of these cryogens are extremely cold at atmospheric pressure (321°F and 452°F, respectively). The following paragraphs outline safe handling precautions for these liquids. Personnel handling cryogenic liquids should be thoroughly instructed and trained as to the nature of the liquids.

  • Page 15: Cryogen Safety Summary

    Foreword Safety Summary 2. Do not apply heat. Loosen any clothing that may restrict circulation. Apply a sterile protective dressing to the affected area. 3. If the skin is blistered or there is any chance that the eyes have been affected, get the patient immediately to a physician for treatment.

  • Page 16: Safety Legend

    Foreword Safety Summary use of safety mechanisms (pressure relief valves, rupture disks, etc.) in cryogenic systems is usually necessary. Recommended Safety Equipment The use of proper safety equipment is necessary. Such equipment may include, but not limited to, the following items: First Aid kit •...

  • Page 17: Equipment Warnings

    This instrument can be used to measure most any cryogenic liquid. Instrument Configuration The Model 1700 Instrument is configured at time of purchase as a capacitance-based (typically liquid nitrogen) level instrument/controller. Every configuration may be further customized by the following options: Table top, single rack mounting, dual rack mounting.
  • Page 18 Foreword Safety Summary A indicates the mounting method: Tbl = tabletop SR19L = single rack mounted, 19” wide rack standard, instrument on left side SR19R = single rack mounted, 19” wide rack standard, instrument on right side SR10L = single rack mounted, 10” wide rack standard, instrument on left side SR10R = single rack mounted, 10”...

  • Page 19: Introduction

    At time of purchase, the Model 1700 will be configured as: • A capacitance-based (typically liquid nitrogen) level instrument/ controller.
  • Page 20 Introduction configure itself to use the internal oscillator unless the external oscillator/ transmitter is connected to the BNC connector on the rear panel. Figure 1-1. Model 1700 Instrument using internal oscillator/ transmitter Rev. 2...

  • Page 21: Digitally-Controlled

    1.1.4 Display The Model 1700 Instrument has a 4.3” diagonal measure TFT (Thin Film Transistor) color liquid crystal display of 480 x 272 pixels. The display has a 4-wire resistive touch overlay for easy operator input.

  • Page 22: Intuitive Human-Interface Design

    (if desired). 1.1.8 Valve Control Output The Model 1700 Instrument has a switched 2 ampere at mains voltage output for energizing a solenoid operated flow valve or other loads. This outputs is controlled by a zero-crossing solid state relay.
  • Page 23 Introduction Model 1700 Liquid Level Instrument The Model 1700 Instrument allows for remote operation with an external browser via TCP/IP connection. All commands that are available by touching the local screen are available via the web browser Figure 1-3. Model 1700 Nitrogen Instrument Via Web Browser...

  • Page 24: Model 1700 Front Panel Layout

    Introduction Model 1700 Front Panel 1.2 Model 1700 Front Panel Layout Figure 1-4. Model 1700 Front View; Dual Channel Instrument Shown 1.3 Model 1700 Rear Panel Layout  Table 1-1. Model 1700 Rear Panel Description Computer Network Connector Aux I/O Connector...

  • Page 25: Model 1700 Specifications @ 25°C

    Introduction Model 1700 System Specifications 1.4 Model 1700 Specifications @ 25°C System Architecture Display: 4.3” 24-bit color TFT display, 480x272 pixel with resistive touch screen Sensor types: Capacitance-based liquid level Maximum length readout: Capacitance-based liquid level - 999 in System operating firmware storage:...
  • Page 26 Introduction Model 1700 System Specifications Controller output power: at line voltage Autofill start/stop triggering: Level-based; 0% to 100%, adjustable Fill Timeout Period: 1 minute to 99 hours, 59 minutes Fill error alarm: Fill time out Communication Protocol Host computer network protocol:...
  • Page 27 Introduction Model 1800 System Specifications Power Frequency Magnetic Field (EN 61000-4-8) Voltage Dips and Interrupts (EN 61000-4-11) Harmonics (EN 61000-3-2) Flicker (EN 6100-3-3) Conducted Emissions (EN 55011/IEC/CISPR 11) Radiated Emissions (EN 55011/IEC/CISPR 11) Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use (IEC 61010-1) a.
  • Page 28 Introduction Model 1700 System Specifications Rev. 2...

  • Page 29: Installation

    2.2 Mounting the Model 1700 Instrument If the Model 1700 Instrument is to be used as a table top model, place the equipment on a flat, secure surface. If the Model 1700 Instrument is to be rack mounted, install it in a 19" wide instrument rack using the mounting hardware supplied by the rack cabinet manufacturer.

  • Page 30: Connecting The Sensor To The Instrument

    If there is any shipping damage, save all packing material and contact the shipping representative to file a damage claim. Do not return the instrument to AMI unless prior authorization has been received. 2. Install the sensor in the vessel using the specified fitting of the sensor.

  • Page 31: Connecting A Capacitance Sensor

    If the transmitter is connected to the sensor with a length of coaxial cable, the a 15 ft standard length cable, with part number of EH2362, is available from AMI. Contact the factory for details. Speak to an AMI Sales Engineer before using cables longer than 15 feet.

  • Page 32: Setting Up An Autofill System

    Model 1700 Instrument. 2.5.1 Autofill System Description For autofill, the system consists of a Model 1700 Instrument with a liquid level sensor, and a solenoid-operated flow valve. The instrument makes continuous level measurements and based on level, energizes the valve to...
  • Page 33 Setting Up an Autofill System begin liquid transfer. The transfer is stopped when the measured level reaches a user-determined point. Figure 2-1. Model 1700 Instrument in an Autofill configuration Figure 2-1. Typical Autofill Setup Table 2-1. Standard Autofill Setup Description...

  • Page 34: Autofill System Setup

    This can occur if the solenoid operated fill valve and the supply dewar isolation valve are closed, trapping a cryogenic liquid in a confined volume. All AMI transfer line systems include a relief valve to preclude this sort of event.

  • Page 35: Power Requirements

    AUTOFILL. 2.6 Power Requirements Warning The Model 1700 Instrument operates on 50-60 Hz power and may be powered from 100-240 Vac. Insure that the input ground terminal is connected securely to an external earth ground. Insure the detachable mains supply cord is of suitable rating, i.e. 10 A (min) at 125 Vac for North America.
  • Page 36 Installation Power Requirements Rev. 2...

  • Page 37: Operation

    3 Operation This section describes the operation of the Model 1700 Instrument. 3.1 Energizing the Model 1700 Instrument 1. Turn the power switch on the front panel of the instrument to the On ( ) position. The display will briefly show the AMI logo and then boot information.

  • Page 38: Navigating The Instrument Menus

    3.3.1 Menu Overview The Model 1700 Instrument displays menus on the graphic display to the left of the keypad. Press on the menu keypad to display options on MENU the graphic display. Menu options are listed in the following Table.
  • Page 39 Operation Using the Model 1700 Menus Note The following table shows all menu choices, some of which will not be shown based on the instrument configuration. Table 3-2. Model 1700 Nitrogen Instrument Menu Structure Menu Label Function Field Type OUTPUTS ALARM RELAY No.1 SOURCE:...
  • Page 40 Operation Using the Model 1700 Menus Table 3-2. Model 1700 Nitrogen Instrument Menu Structure Menu Label Function Field Type OUTPUTS, Toggles 0-10 Vdc SOURCE: continued between: DISABLED, NITROGEN Toggles 4-20 mA SOURCE: between: DISABLED, NITROGEN NETWORK ADDRESS: <value> Data entry or Information NETMASK: <value>...
  • Page 41 Operation Using the Model 1700 Menus Table 3-2. Model 1700 Nitrogen Instrument Menu Structure Menu Label Function Field Type SYSTEM SERIAL NUMBER: Information: (page 2) <value> HARDWARE VERSION: Information: <value> DATE OF MANUFACTURE: Information: <value> FIRMWARE VERSION: Information: <value> Information:...

  • Page 42: Editing A Field

    Operation Using the Model 1700 Menus Table 3-2. Model 1700 Nitrogen Instrument Menu Structure Menu Label Function Field Type SYSTEM RESET INSTRUMENT Performs a (page 3) function CALIBRATE Assists user in performing the instrument touch Transfer to TOUCH screen calibration...
  • Page 43 Operation Using the Model 1700 Menus Table 3-3. Model 1700 Instrument Footer during editing a field Button Reference Name Function Paragraph Saves the entries made on the screen. The  SAVE footer changes to the footer shown in Table 3- 1, above.

  • Page 44: Menu Navigation

    Operation Using the Model 1700 Menus 3.3.3 Menu Navigation Figure 3-8. Model 1700 Menu Structure 3.4 Capacitance (Liquid Nitrogen) Level 3.4.1 Configure the instrument to display nitrogen level Note If the instrument was purchased with a capacitance-based level sensor, Steps 1 through 5, below have already been performed.

  • Page 45: Other Liquid Helium Functions

    Figure 3-10. Nitrogen Level Displayed on Home Screen 3.5 Alarms and Relays 3.5.1 Overview The Model 1700 Instrument has two types of alarms, level-based and time- based alarms. 3.5.1.1 Level-Based Alarms The Model 1700 Instrument has two user-configurable level alarms. Each alarm can be triggered by either level measurement (for dual level config- ured instruments).

  • Page 46: Time-Based Fill Alarm

    3.5.1.2 Time-Based Fill Alarm The Model 1700 Instrument has an alarm to indicate that there is a prob- lem with the LN autofill function. If enabled, the instrument will start a timer when an autofill condition is initiated, and if the level has not reached the fill stop level within the user-set period of time, an Autofill Timeout alarm will occur.

  • Page 47: Configuring Alarm Setpoints

    Operation Using the Model 1700 Menus 3.5.2 Configuring Alarm Setpoints 1. From the MENU choice, select OUTPUTS and the first page of the Output Configuration screen will be displayed. Figure 3-12. Output Configuration Screen, Page 1 2. Ensure the Alarm Relay Source fields are set to NITROGEN (or DISABLED).

  • Page 48: Muting An Alarm

    Operation Using the Model 1700 Menus 1. When an alarm is initiated, several things will occur: a. The bar-graph level display that is causing the alarm condition as well as the sensor name will flash red. b. The ALARM button in the...

  • Page 49: Configure The Autofill Function

    Operation Using the Model 1700 Menus 3.6 Configure the Autofill Function 3.6.1 Autofill overview There are several variables that must be addressed to set up an autofill system. These include the level indication that will be used to control auto- fill, the Fill Start level (A), the Fill Stop Level (B), and the fill timeout interval.

  • Page 50: Select The Appropriate Units On The Display

    Operation Using the Model 1700 Menus To enable the autofill function: 1. Press on the M-CLOSED icon in the display footer until it reads AUTOFILL. 2. Press SAVE to enable the autofill function. The AUTOFILL button has three states: Table 3-4. Autofill Settings...

  • Page 51: Configuring The Analog Outputs

    Operation Using the Model 1700 Menus 3.8.2 Configuring the Analog Outputs 1. From the MENU screen, choose OUTPUTS, then Page 2. 2. If necessary, choose the source for the 0-10 VDC output and 4- 20 mA output. 3. Press the SAVE button to save the choice (or CANCEL to quit Figure 3-23.

  • Page 52: Abnormal Operation

    This is a physical phenomenon and does not indicate any problem with your AMI level equipment. Limit or eliminate exposure of cold sen- sors to humidified air to avoid this condition.

  • Page 53: Resetting The Instrument To Factory Defaults

    For sensors to be used with liquid oxygen (LOX), although measures are taken to minimize oils and greases during manufacture, no special clean- ing required for LOX service is provided by AMI. Certified LOX cleaning is the responsibility of the customer.

  • Page 54: Shutting The Instrument Down

    1. The instrument should be shut down by using the menu function SHUT DOWN SYSTEM. Note The Model 1700 Instrument is a Linux-based computer system and in Figure 3-30. Invoking Instrument Shut order to ensure the file system is Down properly unmounted, the SHUT DOWN SYSTEM function should be invoked.

  • Page 55: Calibration

    4 Calibration Model 1700 instrument is calibrated at the factory for a specific length sensor(s) for use in a specific liquid(s). The calibration length(s) and calibration liquid(s) are listed on the calibration sticker on the bottom of the instrument. For capacitance sensors, if the factory calibration method utilized was approximate, the calibration length will be noted as an approximate value.

  • Page 56: Capacitance-Based Level Calibration

    2.5 cm (1 in) below the upper vent hole is typically the 100% calibration point. The Model 1700 Instrument requires the user to enter the calibrated, or active length, (physical distance between the Min and Max calibration locations on the sensor) in order for the absolute units function (inches, cm) to be displayed if desired.

  • Page 57: Figure 4-5 Typical Capacitance-Based Liquid Level Sensor

    Calibration Capacitance-Based Level Calibration : Understanding Active Length Figure 4-5. Typical Capacitance-based Liquid Level Sensor The user must enter the sensor length in centimeters. Use the Active Length value noted on the level sensor documentation or measure the distance between the lower vent hole on the sensor and 1.0 inch (2.5 cm) below the upper vent hole on the sensor.

  • Page 58: Relationship Between Calibration And Sensor Length

    — see page 49 for a detailed discussion of the approximate calibration method. If any questions exist in regard to calibration issues, contact AMI for assistance in determining the optimal calibration strategy.

  • Page 59: Capacitance-Based Sensor Calibration Methods

    Occasionally customers ask AMI to calibrate an instrument and sensor for a liquid which is not available at AMI for calibration purposes and/or for a sensor which is too long to be calibrated at our facilities.

  • Page 60: Selection Of Capacitance Sensor Calibration Methods

    For the case where a sensor is too long to be calibrated in AMI facilities, AMI will perform a partial length open dewar calibration in liquid nitrogen, and then calculate the MAX calibration point.

  • Page 61: Figure 4-7 Calibration Method Selection Diagram

    Figure 4-7. Calibration method selection diagram. Occasionally customers ask AMI to calibrate an instrument and Sensor Transmitter for a liquid which is not available at AMI for calibration purposes and/or for a sensor which is too long to be calibrated at our facilities.

  • Page 62: Pre-Calibration Procedure

    For the case where a sensor is too long to be calibrated in AMI facilities, AMI performs a partial length open dewar calibration in liquid nitrogen, and then calculates the maximum calibration point.

  • Page 63: Figure 4-11 Calibrate Nitrogen Selection Button

    Calibration Capacitance-Based Level Calibration : Pre-Calibration Procedure 5. Press the CALIBRATE NITROGEN button Figure 4-11. CALIBRATE NITROGEN Selection Button 6. Touch in the SENSOR ACTIVE LENGTH field and using the numerical keypad, enter the sensor active length in cm. Press Enter and then SAVE at the bottom of the screen when finished Figure 4-12.

  • Page 64: Performing Loss Of Sensor Calibration

    4.2.5.2 Performing Loss of Sensor Calibration The Model 1700 will detect when the liquid level sensor has been disconnected from Figure 4-16. Home Selection Button the instrument and display a notification on the front panel.

  • Page 65: Figure 4-18 Sensors Selection Button

    Calibration Capacitance-Based Level Calibration : Pre-Calibration Procedure 3. Choose the SENSORS selection from the MENU screen. Figure 4-18. SENSORS Selection Button 4. From the SENSORS Menu, choose CALIBRATE NITROGEN. Figure 4-19. CALIBRATE NITROGEN Selection Button 5. Select the NO SENSOR CAL button.

  • Page 66: Performing An Open Dewar Calibration

    Calibration Capacitance-Based Level Calibration : Open Dewar Cal Procedure 4.2.6 Performing an Open Dewar Calibration 1. Press the MENU button in the lower left corner of the display screen. Figure 4-21. MENU Selection Button 2. Choose the SENSORS selection from the MENU screen.

  • Page 67: Approximate Calibration

    Calibration Capacitance-Based Level Calibration : Approximate Calibration Procedure 5. The instrument will display the following screen as it takes data for several seconds. Once the calibration measurement is completed, press the SAVE button. Figure 4-25. Updated MAX CAL Frequency 6. Position the capacitance sensor in the target liquid at the 0% level.

  • Page 68: Figure 4-27 Menu Selection Button

    Calibration Capacitance-Based Level Calibration : Approximate Calibration Procedure sensor cannot be dipped, then a partial length dip can be performed. If both situations are encountered, then a partial length dip can be performed in a substitute reference liquid. 1. Press the MENU button in the lower left corner of the display screen.

  • Page 69: Figure 4-31 Updated Max Cal Frequency

    Calibration Capacitance-Based Level Calibration : Approximate Calibration Procedure 5. The instrument will display the following screen as it takes data for several seconds. Once the calibration measurement is completed, press the SAVE button. Figure 4-31. Updated MAX CAL Frequency 6. Position the capacitance sensor in the target liquid at the 0% level.

  • Page 70: Figure 4-33 Approx. Cal. Value Field

    Calibration Capacitance-Based Level Calibration : Approximate Calibration Procedure where L is the length of the sensor dipped in the reference dipped liquid and L is the active sensor length. active Note If the target liquid is available for dipping (i.e. the reference liquid and target liquid are the same), then the dielectric ratio, ( e -1)/( e -1),...

  • Page 71: Closed Dewar Calibration

    Calibration Capacitance-Based Level Calibration : Closed Dewar Calibration Procedure in step 2. The maximum point is set as outlined in step 3 while the sensor is submerged 30" in liquid nitrogen. The dielectric constant for liquid nitrogen is 1.454 and for liquid argon is 1.53. Substituting all values into the approximate calibration factor equation yields: 1.53 1...

  • Page 72: Figure 4-35 Menu Selection Button

    Calibration Capacitance-Based Level Calibration : Closed Dewar Calibration Procedure 2. Press the MENU button in the lower left corner of the display screen. Figure 4-35. MENU Selection Button 3. Choose the SENSORS selection from the MENU screen. Figure 4-36. SENSORS Selection 4.

  • Page 73: Completing The Closed Dewar Calibration Procedure

    Calibration Capacitance-Based Level Calibration : Closed Dewar Calibration Procedure 7. Connect the sensor to the oscillator coaxial cable that is connected to the instrument. 8. Perform the maximum level calibration by invoking the maximum calibration function by pressing MENU > SENSORS >...

  • Page 74: Figure 4-41 Perform Max Cal. Selection Button

    Calibration Capacitance-Based Level Calibration : Closed Dewar Calibration Procedure communications option can be used to query the instrument for the liquid level at regular time intervals during the calibration procedure. If no remote monitoring or communication option is installed, the level display must be manually plotted vs. time during the procedure.

  • Page 75: Figure 4-42 Perform Max Cal. Selection Button

    Calibration Capacitance-Based Level Calibration : Closed Dewar Calibration Procedure Note Note that the frequency listed to the right of the PERFORM MIN CAL button is updated as well as the date and time stamp of the calibration point. 7. Continue the transfer while observing the liquid level trace on the strip chart recorder or computer display, whose slope is proportional to the transfer rate.

  • Page 76: Figure 4-43 Updated Max Cal Frequency

    If the sensor was made in a custom configuration, refer to the sensor documentation and/or drawing or contact AMI. Example: 20" active length sensor: When the sensor is calibrated by the closed dewar procedure, the actual length of calibration will be 21"...
  • Page 77 Calibration Capacitance-Based Level Calibration : Closed Dewar Calibration Procedure Rev.
  • Page 78 Calibration Capacitance-Based Level Calibration : Closed Dewar Calibration Procedure Rev. 2...

  • Page 79: Remote Interface Reference

    IP address can be ascertained by referring to the section titled “IP Addressing Scheme” on page 33. By using a browser to connect to the instrument, all functionality of the Model 1700 can be controlled via the browser. 5.1 SCPI Command Summary...

  • Page 80: Scpi Serial (Rs-232) Communication

    (the requirements for a DTE, or Data Terminal Equipment device). If a serial-to-parallel converter is used, it must be capable of receiving data on pin 3 or the cable connected to the Model 1700 must interchange the wires between pins 2 and 3.

  • Page 81: Command Set Reference

    Error Codes section). All return values including error codes are terminated with <CR><LF> (i.e. a carriage return followed by a linefeed). For those commands that do not return a value, the Model 1700 will return the <CR><LF> termination only.
  • Page 82 Remote Interface Reference Command Set Reference : Instrument Configuration Queries Command: DISPLAY:N2? Returns a 0 if the instrument is not configured to display Function: liquid nitrogen level on the home screen and a 1 if it is. 0 or 1<CR><LF> Returns: Default: Command: DISPLAY:HE?
  • Page 83 Remote Interface Reference Command Set Reference : Instrument Configuration Queries Command: RELAY1:OPeration? Returns a 0 if relay №1 closes (alarms) when the level is Function: above the setpoint and a 1 if the relay closes (alarms) when the relay is below the setpoint. By default, relay №1 is configured as the high level relay with alarm condition when level is greater than the setpoint.
  • Page 84 Remote Interface Reference Command Set Reference : Instrument Configuration Queries Command: Returns the A setpoint limit (auto fill stop level) in the Function: current units Returns: <value><CR><LF> Default: Command: Returns the A setpoint limit (auto fill start level) in the Function: current units Returns:...
  • Page 85 Remote Interface Reference Command Set Reference : Instrument Configuration Queries Command: SOURCE:CURRent_LOOP? Returns a 0 if the 4-20 mA Current Loop Output is disabled, a Function: 1 if it is configured for the nitrogen channel, and a 2 if it is configured for the helium channel.

  • Page 86: Commands For Setting The Units Of Measurement

    Remote Interface Reference Command Set Reference : Setting Measurement Units 5.5.2 Commands for setting the units of measurement Command: Sets the liquid level units of measurement to centimeters. Function: Returns: <CR><LF> Default: Command: INCH Sets the liquid level units of measurement to inches. Function: Returns: <CR><LF>...

  • Page 87: Commands For Configuring Setpoints

    Remote Interface Reference Command Set Reference : Configuring Setpoints 5.5.3 Commands for configuring setpoints Command: CONFigure:RELAY1:CHannel <value> Assigns relay 1 to either no channel (disabled) (0), nitrogen Function: (1), or helium (2). Returns: <CR><LF> Default: Command: CONFigure:RELAY2:CHannel <value> Assigns relay 1 to either no channel (disabled) (0), nitrogen Function: (1), or helium (2).
  • Page 88 Remote Interface Reference Command Set Reference : Configuring Setpoints Command: CONFigure:RELAY2:SETpoint <value> Configures the relay №2 trip setpoint in the current channel’s Function: units. Returns: <CR><LF> Default: Command: HI=<value> Sets the HI setpoint in the current units (Relay №1). Function: Returns: <CR><LF>...
  • Page 89 Remote Interface Reference Command Set Reference : Configuring Setpoints Command: CONFigure:SOURCE:REC_OUT <value> Function: Configures the 0-10 Vdc Recorder Output’s source to disabled (0), assigned to the nitrogen channel (1), or the helium channel (2). Returns: <CR><LF> Default: Command: CONFigure:SOURCE:CURRENT_LOOP <value> Function: Configures the 4-20 mA Current Loop’s output source to disabled (0), assigned to the nitrogen channel (1), or the helium channel (2).

  • Page 90: Commands For Setting The Channel Identifiers

    Remote Interface Reference Command Set Reference : Instrument Channel Identifiers 5.5.4 Commands for setting the channel identifiers Command: CONFigure:NAME:SENSOR:N2=<“string”> Function: Sets the name of the nitrogen level sensor. Returns: <CR><LF> Default: Nitrogen Level Rev. 2...

  • Page 91: Commands For Making Liquid Level Measurements

    Remote Interface Reference Command Set Reference : Measuring Level 5.5.5 Commands for making liquid level measurements Command: LEVEL Function: Returns the liquid nitrogen or helium level in the current units. Returns: <value><CR><LF> Default: Command: MEASure:N2:LEVel? Function: Returns the liquid nitrogen level in the current units. Returns: <value><CR><LF>...

  • Page 92: Commands For Calibrating Level Sensors

    Remote Interface Reference Command Set Reference : Calibration Functions 5.5.6 Commands for calibrating level sensors Command: MINCAL Function: Performs a minimum calibration point calibration. Returns: <CR><LF> Default: Command: MAXCAL Function: Performs a maximum calibration point calibration. Returns: <CR><LF> Default: Command: CONFigure:N2:LENGTH=<value> Function: Configures the liquid nitrogen sensor active length in current units.

  • Page 93: System Commands

    Remote Interface Reference Command Set Reference : System Commands 5.5.7 System Commands Command: SYStem:BEEPer:IMMediate,<time> Function: The receipt of this command causes an audible tone to be generated by the instrument. Note that this command generates an event and therefore it has no associated SYS:REBOOT state or query form. The duration time parameter is specified in seconds.

  • Page 94: Error Codes

    <CR><LF> Default: 5.6 Error Codes The Model 1700 returns specific error codes for invalid commands and/or arguments. If an error condition is returned, the command is not processed and the configuration of the instrument is not modified. The table below provides a list of error codes, their meaning, and any associated limits.
  • Page 95 Remote Interface Reference Command Set Reference : Calibration Functions Error Code Meaning Valid Range Invalid argument, value out of   1 cm value 650 cm maximum calibration range   INTERVAL setting out of range INTERVAL 600 min Unrecognized command Invalid argument, value was negative or non-numeric Approximate calibration factor out of...
  • Page 96 Remote Interface Reference Command Set Reference : Calibration Functions Rev. 2...

  • Page 97: Service And Repair

    Do not use detergent or solvents. Do not attempt internal cleaning. 6.2 User Replaceable Parts Replacement parts for the instrument are listed in the table below. AMI Part Number Description HG0128 Instrument foot SA 1045 Single Rack Mount Kit...

  • Page 98: Battery Replacement

    Service and Repair 6.3 Battery Replacement This section describes the procedure for replacing the battery on the instrument's main circuit board. Warning This procedure should only be performed by a technician who is familiar with electronic instrumentation and trained in electrical safety and ESD precautions.

  • Page 99: Fuse Replacement

    Service and Repair 6.4 Fuse Replacement This section describes the procedure for replacing the two fuses on the instrument's main circuit board. Warning This procedure should only be performed by a technician who is familiar with electronic instrumentation and trained in electrical safety and ESD precautions.
  • Page 100 Service and Repair Rev. 2...

  • Page 101: Appendix

    Appendix A.1 Connector Wiring The following sections document the connector pin outs and pin definitions. A.1.1 Serial (RS-232) Connector Figure A-1 Serial (RS-232) Pin Out The RS-232 connector is a 9-pin D-sub female connector to connect standard DTE 9-pin D-sub male connector using a standard straight (not NULL) cable.

  • Page 102: Ethernet Connector

    Appendix Ethernet Connector A.1.2 Ethernet Connector Pin 1 Figure A-2 Ethernet Connector Socket Pin out Table A-2 Ethernet RJ-45 Connector Pin Definitions Mnemonic Function TXD+ Transmit differential output + TXD- Transmit differential output - RXD+ Transmit differential input + not used Transmit differential input - not used Rev.

  • Page 103: Aux I/O Connector

    Appendix Aux I/O Connector Pin Outs A.1.3 Aux I/O Connector Figure A-3 Aux I/O Connector Table A-3 Aux I/O Pin Definitions Function Polarity 4-20 mA Current Loop 0-10 VDC Output Relay № 2 Dry Contact Relay № 1 Dry Contact External Reset Rev.

  • Page 104: Troubleshooting

    A.3 Firmware Licenses The Model 1700 firmware is based on a distribution of Debian Linux, with modifications to the Linux kernel by Technologic Systems and AMI, and additional user interface components by AMI. Some components of this firmware are licensed under agreements that require AMI to make source code available to interested parties.
  • Page 105 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. The Model 1700 firmware includes an OpenSSH client and server and also uses OpenSSH libraries in other components. The individual components...
  • Page 106 Appendix Troubleshooting ssh-keyscan was contributed by David Mazieres under a BSD-style license. * Copyright 1995, 1996 by David Mazieres <dm@lcs.mit.edu>. * Modification and redistribution in source and binary forms is * permitted provided that due credit is given to the author and the * OpenBSD project by leaving this copyright notice intact.
  • Page 107 Appendix Troubleshooting Remaining components of the software are provided under a standard 2-term BSD license with the following names as copyright holders: Markus Friedl Theo de Raadt Niels Provos Dug Song Aaron Campbell Damien Miller Kevin Steves Daniel Kouril Wesley Griffin Per Allansson Nils Nordman Simon Wilkinson...
  • Page 108 Appendix Troubleshooting Portable OpenSSH contains the following additional licenses: a) md5crypt.c, md5crypt.h * "THE BEER-WARE LICENSE" (Revision 42): * <phk@login.dknet.dk> wrote this file. As long as you retain this * notice you can do whatever you want with this stuff. If we meet * some day, and you think this stuff is worth it, you can buy me a * beer in return.
  • Page 109 ***************************************************************************/ The Model 1700 firmware uses portions of the "tslib" touchscreen library, which are licensed under the GNU Public License, version 2. The source code to tslib was obtained by AMI from github.com using the command: git clone https://github.com/kergoth/tslib The Model 1700's touchscreen browser was linked against the Qt libraries for The X Window System that were available from the Debian package repository.
  • Page 110 QT += webkit SOURCES = browser.cpp ---end file browser.pro--- The Model 1700 firmware uses the Jansson library for encoding and decoding messages in the JSON (JavaScript Object Notation) format. The Jansson library is subject to the following license: Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including...
  • Page 111 Appendix Troubleshooting The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  • Page 112 Appendix Troubleshooting Rev. 2...

  • Page 113: Glossary

    A substance for obtaining low temperatures. in the case of use with the Cryogen Model 1700 instrument, a cryogen is a liquefied gas such as liquid nitrogen or liquid helium. Term referring to the family of connectors containing an odd number of...
  • Page 114 Glossary Term Meaning IEEE Institute of Electrical and Electronics Engineers Input/Output; The hardware and associated protocol that implement communication between information processing systems and/or devices. Inputs are the signals or data received by the system or device, and outputs are the signals or data sent from it. Internet Protocol;...

  • Page 115: Index

    1 Index Index operating characteristics abbreviations and acronyms analog input rear panel layout pin outs remote interface reference - see command approximate calibration RS-232 autofill connector pin definitions standard pin out system setup safety calibrating cryogenic liquids approximate equipment closed dewar legend methods warnings...
  • Page 116 Index Rev. 2...

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