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ASL INTERCOM CTR5000 Manual

Precision thermometer
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Precision thermometer CTR5000
Accuracy 0.01 K
Version 1.1, 03/14
ASL operating instructions, model CTR5000
CTR5000 Operating Instructions
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Summary of Contents for ASL INTERCOM CTR5000

  • Page 1 CTR5000 Operating Instructions Manual Precision thermometer CTR5000 Accuracy 0.01 K Version 1.1, 03/14 ASL operating instructions, model CTR5000...

  • Page 2: Table Of Contents

    Outside the European Union....................... xii Batteries ..............................xii INTRODUCTION ............................. 14 Overview ..........................14 Definitions and terminology ....................15 Differences between CTR5000 and F250 ................15 Principles of measurement ....................16 Temperature measurement ....................16 Measurement units ......................... 16 Security ............................ 17 SETTING UP THE CTR5000 ........................
  • Page 3 Expansion port ........................27 3.6.5 USB Communication interface connector ..............28 3.6.6 RS232/LAN/IEEE 488 Communication options interface connector ......28 OPERATING THE CTR5000 ........................30 Instrument operating modes ....................30 Measurement mode ......................30 Setting the instrument’s operating conditions ..............32 4.3.1 Hold key..........................
  • Page 4 CTR5000 reference calibration ..................... 84 Equipment ..........................84 Calibration procedure ......................84 Full instrument calibration procedure .................. 84 OBTAINING THE BEST FROM THE CTR5000 BRIDGE ................86 Procedure ..........................86 COMMUNICATIONS - INTERFACE AND PC COMMANDS ..............87 Introduction ..........................87 Interfaces ..........................
  • Page 5 17.1 DIN 90 1980 (EN 60751) ......................115 17.2 DIN 43760 1980 (IEC 751) ..................... 115 APPENDIX 6– AC BRIDGE OPERATION ..................116 18.1 AC Bridge basics ........................116 APPENDIX 7– REPORT EXAMPLES ....................118 ASL operating instructions, model CTR5000...
  • Page 6 CTR5000 Operating Instructions 19.1 Channel report ........................118 19.2 Assigned probes report ....................... 119 19.3 All probes report ........................120 19.4 Instrument report ........................121 19.5 Smart probe report ....................... 122 INDEX ................................123 ASL operating instructions, model CTR5000...

  • Page 7: Conventions Used In This Manual

    Sections are sub-divided into sub-headings, for example - 1.1 Features. These may also be subdivided. Terminology The terms CTR5000 Bridge, AC Bridge, CTR5000, bridge and instrument are used interchangeably in this manual. Menu selection is shown in shorthand form, for example –...

  • Page 8: Important Safety Information

    CTR5000 Operating Instructions Important safety information Read and understand the user instruction manual before attempting to use the instrument. The CTR5000 is an AC bridge designed for measuring passive resistances. It must not be used for any other purpose. Warning The protection provided by the instrument may be impaired if the equipment is not used in the manner specified.
  • Page 9 You must read the relevant sections in the User Manual before using the instrument. Refer to manual symbol. When you see this symbol on the instrument it means that there is more information relating to this in the User Manual. ASL operating instructions, model CTR5000...

  • Page 10: Important Installation Information

    Brown wire to Live (Line) Blue wire to Neutral Green and Yellow wire to Earth (Ground) Warning The instrument is designed to be connected to the mains supply via a plug and must be effectively earthed. ASL operating instructions, model CTR5000...

  • Page 11: Important Probe Safety Information

    Care must be taken with the probes used with the instrument. The following safety information must be observed. Do NOT attempt to lift the CTR5000 by any of the leads  Do ensure that long probe-leads and other leads are kept away from areas where ...

  • Page 12: Important Disposal Information

    Batteries The CTR5000 contains a replaceable lithium cell, held in a holder on the main PCB. This cell must be disposed of in accordance with local regulations...
  • Page 13 CTR5000 Operating Instructions This page is intentionally left blank ASL operating instructions, model CTR5000 xiii...

  • Page 14: Introduction

    The performance and multi-channel capabilities make it ideal for a wide range of applications. The CTR5000 Bridge is based on AC technology and operates with all 4-wire Platinum Resistance Thermometers (PRTs) . Features include –...

  • Page 15: Definitions And Terminology

    Two measurement channels (A and B) are provided on the front of the instrument. The CTR5000 may be expanded up to six channels with the addition of two more channels (C and D), or four more channels (C, D, E and F) on the rear of the instrument; differential mode operation is provided for these channels.

  • Page 16: Principles Of Measurement

    Units can be set on a per probe basis (probes are assigned to channels). When a new channel is selected, the CTR5000 will check to see if a probe is assigned to that channel. If it is, the programmed probe’s units will be used (initially) - this does not prevent the units from...

  • Page 17: Security

    Security is important for data integrity and password protection helps to ensure that only authorised personnel can change calibration or system information. Three levels of protection are provided. Note All examples in the following sections (apart from the section on security) assume that no security mode is selected. ASL operating instructions, model CTR5000...

  • Page 18: Setting Up The Ctr5000

    2. Setting up the CTR5000 2.1 Safety information Please read the safety information section before operating the CTR5000. 2.2 Unpacking the instrument When unpacking the CTR5000 Bridge, check that the following items are present before using the instrument – ...

  • Page 19: Getting Started

    (99) and then press the enter key on the keypad. IntR will be displayed at the top left of the LCD. The internal check resistor will be deselected when the channel is changed to any other (or the CTR5000 turned off).
  • Page 20 Press the 1 key on the numeric keypad. The top left of the LCD will display a flashing Cn01, indicating channel 1 (A). Press the  key (bottom right of the keypad). The CTR5000 will return to channel A ...

  • Page 21: About The Ctr5000 Precision Bridge

    CTR5000 Operating Instructions 3. About the CTR5000 Precision Bridge This section introduces the features and functions of the CTR5000 Bridge. Each of the CTR5000 Bridge’s features is explained in turn. Once the CTR5000 has been set to your particular requirements, all commonly used functions are available using the minimum number of key- strokes.

  • Page 22: About The Lcd Display Screen

    The soft-keys are used to access data and/or functions within the instrument. The CTR5000 keypad is shown in detail below. The keys are used to select the various functions and menu options and to control the instrument. Generally, all commonly used functions are available at the top level and no more than one or two menu levels are required for other commonly used settings.
  • Page 23 Zero and Hold will be disabled when the units are changed. Hold takes precedence over Zero. By typing a one or two digit channel number followed by the enter ( ) key on the numeric keypad. ASL operating instructions, model CTR5000...

  • Page 24: Input Connections

    Two 5-pin DIN input sockets (channel A and channel B) are located on the front panel and up to four more sockets may be present on the back of the CTR5000 (channels C, D, E and F). Up to four expansion switchboxes may be attached to the instrument via the rear expansion port connector.

  • Page 25: Probe Connections

    Alternatively, Smart Probes can be used. These probes contain the calibration data within the probe connector and this data will be used to over-ride any internal CTR5000 settings when a smart-probe is seen on an input channel.

  • Page 26: Wire Prt

    Refer to document ASL-SMP-10-101 Smart Probe Conversion Kit. 3.5.6 Internal 100Ω check resistor The CTR5000 contains an internal check resistor. Select channel 99 to use this resistor (IntR will displayed at the top left of the LCD). It is quite accurate, but not as temperature-stable the internal reference resistor.

  • Page 27: Rear Panel

    An expansion port connector is provided on the rear panel. The connector enables up to four CTS5000 switchboxes to be used to expand the number of input connections to provide up to 64 additional channels. ASL operating instructions, model CTR5000...

  • Page 28: Usb Communication Interface Connector

    3.6.6 RS232/LAN/IEEE 488 Communication interface connector The CTR5000 may (optionally) be fitted with one of these interfaces. Operation is similar for all communication interfaces. See the chapter of communications for further details. The optional interface and USB connection may be used simultaneously. However, when sending commands to the CTR5000, operation will depend on timing and may not provide the expected sequence of operation.
  • Page 29 CTR5000 Operating Instructions This page is intentionally left blank ASL operating instructions, model CTR5000...

  • Page 30: Operating The Ctr5000

    In Measurement Mode, the screen displays the current reading (its units - resistance or temperature); it also displays the current channel, assigned probe and the time of day. This is the normal operating display mode for the CTR5000. The normal display will look similar to the one shown below –...
  • Page 31 Note The Menu and Esc keys are still active when the Statistical, Graphical or Large mode screens are selected (the legends are overlaid to allow increased display area). ASL operating instructions, model CTR5000...

  • Page 32: Setting The Instrument's Operating Conditions

    The Unit soft-key is shown highlighted in this example. This indicates that the current units are not the same as the pre- programmed units of the attached Passive or Smart probe. This feature is only an indication - it has no other significance. ASL operating instructions, model CTR5000...

  • Page 33: Hold Key

    Pressing the Zero key will change the display to – ChA ITS90 Pb09 12:02:03 C E s c 0•000 M e n u C h a n Z e r o H o l d U n i t  ASL operating instructions, model CTR5000...

  • Page 34: Resolution

    This is the normal display mode for the instrument. The blue display key is used to change display modes and to allow the result resolution to be set. 4.3.4.2 Full display Pressing the blue display key will change the display to show – ASL operating instructions, model CTR5000...

  • Page 35: Statistical Display

    Clr. Pressing the Clr soft-key will ask for confirmation that you want to clear (reset) the statistics. Note that the Esc and Menu soft-keys are still active. Press the blue display key to select an alternative display mode. ASL operating instructions, model CTR5000...

  • Page 36: Graphical Display

    Pressing the x1 key will change scale, circulating through x1, x10, x100, and x0.1. Press the blue display key to select an alternative display mode. 4.3.5 Channel soft-key This is described in full detail in section 4.5. ASL operating instructions, model CTR5000...

  • Page 37: Editor

    Once the coefficient has been correctly entered, press the enter key (  ) to selected the edited number or press the Esc key to return without changing the value. Strings (e.g. the Probe id field) are edited in a similar way. Keys auto-repeat. ASL operating instructions, model CTR5000...

  • Page 38: Menu Mode

    CTR5000 Operating Instructions 4.4 Menu mode The exact appearances of the menus depend on the options fitted to the CTR5000. For example, if a RS232 interface is fitted, the communication and other relevant menus will change to reflect this; similarly, channel menu options reflect the number of additional channels fitted.
  • Page 39 A small down arrow will be shown at the bottom right of the menu screen when additional menu options are available. The three dots (…) after the legend indicate that there are more menu available for this item ASL operating instructions, model CTR5000...
  • Page 40 3 Probe group 2 4 Probe group 3  5 Set group conv…  P g D n  Note The instrument continues to measure normally during all menu displays and selection options. The graph is frozen. ASL operating instructions, model CTR5000...

  • Page 41: Selecting Channels

    A flashing Cnxx will be shown at the top left of the screen when channel data is entered this way. CTS5000-16’s and CTS5000-8’s may be mixed in any order. However, for ease of use, it is advisable to provide consecutive addresses. ASL operating instructions, model CTR5000...

  • Page 42: Channel Selection - Method 2

    For example, if channels C and D are fitted, pressing the More soft-key will show – ChA ITS90 Pb09  1 Sel chan C 2 Sel chan D  ASL operating instructions, model CTR5000...

  • Page 43: Difference Channel Selection

    CTR5000 channel . Similarly, menu item 4 Sel (B – Y) selects a difference reading between channel B and another CTR5000 channel. For example selecting menu 3 Sel (A – X) will display the following – Difference modes are not supported for switchbox channels.
  • Page 44 (see the section on editing numbers for more details on this). Note The difference can be calculated between any two valid CTR5000 channels. An error message will be displayed if the channel is not available. Note Smart probes take time to read their stored information.

  • Page 45: Channel Selection With Cts5000-8 And Cts5000-16 Switchboxes

    CTR5000. Unused addresses will be ignored on 8 channel switchboxes. Addresses are – First switchbox – Channel Numerical address Second switchbox – Channel Numerical address The first switchbox connects to the CTR5000, a second to the first switchbox and so on. ASL operating instructions, model CTR5000...

  • Page 46: Method B

    Select the Sel chan CTS5000 menu option and press one of the enter keys. The display will  change (depending on the number of switchboxes fitted) to – The exact appearance of the display will depend on which additional channels are fitted to the instrument ASL operating instructions, model CTR5000...
  • Page 47 Select the first menu 1 CTS5000/16 (16 – 31) with one of the enter keys, and the display will change to show the message Surveying. The CTR5000 will take a few seconds to check the switchbox(es) for Smart probes. The screen will then show the layout of the switchbox –...

  • Page 48: Method C

    l  C T S 5 0 0 0 l C T R 5 0 0 0  The arrow soft-keys will move through sequential channels. The keys auto-repeat. Press the Esc key to exit. ASL operating instructions, model CTR5000...
  • Page 49 Switchbox connections are determined dynamically by the instrument at power-on. The CTR5000 menus will always change automatically to show the current connection configuration. Warning Do NOT plug or unplug switchboxes when the CTR5000 is powered ASL operating instructions, model CTR5000...

  • Page 50: Channel And Probes

    Default DIN settings are used. There is no need to enter the maximum/minimum temperatures for the CTR5000. These are defined by the conversion method. The screen will display a warning if the temperatures are outside the valid conversion range –e.g. t > t...

  • Page 51: Probe Review And Edit

    CTR5000 Operating Instructions 4.5.6 Probe review and edit Up to 72 probes may be defined and stored by the CTR5000. Each probe number (1 to 72) can be entered or edited to define its conversion method, coefficients used, resistance and probe id string.

  • Page 52: Probe Selection (Individual)

    (current probe selection is indicated at the top left of the screen). The majority of the probes have not been defined and are currently set to the default of DIN90 (D). ASL operating instructions, model CTR5000...
  • Page 53 B a c k  Press the Back soft-key to return to the previous screen. Once the cursor is over the required probe, press the enter key ( ) to select this probe number for review or editing. ASL operating instructions, model CTR5000...

  • Page 54: Probe Review And Editing

    7 Set probe Tmin Set the probe lower temperature limit Default set to DIN limits 8 Copy probe Copy current probe settings to another Channel assignment unchanged Probe menu example with variable coefficients – ITS90 ASL operating instructions, model CTR5000...

  • Page 55: Conversion

    Use the editing arrows, or enter the menu number, to select the required conversion method. The exact appearance of the previous screen will depend on whether the coefficients can be changed. Note Selecting (or reselecting) a conversion method will reset the coefficients to their default values. ASL operating instructions, model CTR5000...

  • Page 56: Review Coeffs

    5 Dp = -4.18300-12   P b 1 6 I T S 9 0  Note that there are more than five coefficients In this example. Select one of the coefficients (e.g. Ap) – ASL operating instructions, model CTR5000...

  • Page 57: Probe Id

    There is no range checking on coefficients – they may be changed to any value. 4.5.7.4 Probe id ChA ITS90 Smart 12:02:03 E s c 3 Send to comms Pb id = ASL/123456   P r o b e i d  ASL operating instructions, model CTR5000...

  • Page 58: Assign To Chan (Unasgn From)

    Strings are empty to start with. Use the enter key ( ) to accept the change or Esc key to leave it unchanged. Note The CTR5000 editor can only use numerical characters to overwrite existing characters. However, other characters can be entered using a data interface and the N command.

  • Page 59: Set Units

    16 Instrument units are the default - when selected, the CTR5000 will use the current units rather than changing to another on channel selection. The units can still be changed from the initial units using the Unit menu – there is no other significance to the setting.

  • Page 60: Set Probe Tmin

    Se the Set Probe Tmax menu since data entry is very similar. Note The Tmax and Tmin limits can be set with a small ‘window’ if a particular temperature needs to be monitored. Note that the icons will only be displayed on the numerical display screen ASL operating instructions, model CTR5000...

  • Page 61: Copy Probe

    All probes in the group will be set to the use the default conversion coefficients for the method. The channel assignments, and probe id string are NOT changed. All other parameters (e.g. units) are copied from the first probe of the group. ASL operating instructions, model CTR5000...

  • Page 62: Calibration

    CTR5000 Operating Instructions 4.6 Calibration It is vital to ensure the CTR5000 is correctly calibrated to obtain the most accurate results. Good laboratory practice dictates that any instrument should be checked before and after a day’s measurements. Note Regularly check calibration.

  • Page 63: Calibration Reference Resistor

     The values of the external, calibrated reference resistors must be accurate to at least 4 decimal places to ensure the CTR5000 is calibrated correctly. Less accurate resistors may be used, but the instrument accuracy will suffer accordingly. ASL operating instructions, model CTR5000...

  • Page 64: Calibration Method

    Use the enter key ( ) to accept this step and move on, or press the Esc key twice to abort the procedure . Using the enter key, the screen will change to – Use the Esc soft-key to abort the procedure at any time. ASL operating instructions, model CTR5000...
  • Page 65 Averaging value . .  Flashing LED (slow) Once the external reference resistor value has been checked, its value will be averaged (note that the average measurement is performed twice). On completion, the screen will show – ASL operating instructions, model CTR5000...

  • Page 66: Automatic Instrument Calibration

    A CTS5000 switchbox is required with a set of calibrated resistors. Once started, the calibration sequence is fully automated. Instrument calibration should be carried out yearly by the supplier or agent. This menu item is password protected. ASL operating instructions, model CTR5000...

  • Page 67: Smart Probe Menu

    Smart probes disabled Once disabled, the Smart probe menu will change to show just –  1 Enable SMPs Select this to re-enable Smart probes (once disabled, Smart probes must be re-enabled to use them again). ASL operating instructions, model CTR5000...
  • Page 68 A detailed description for the Smart probe in the F200 User’s manual (on the CD provided). Editing is similar to other menus. A message showing No Smart probe Chnn will be briefly displayed if the current channel does not have a Smart probe. ASL operating instructions, model CTR5000...

  • Page 69: Reset Defaults Menu

    N command can be used to enter any arbitrary string. 4.6.2.1 Reset defaults menu Use this menu to reset all the Smart probe data fields to their default values for the CTR5000. Select the menu and respond to the Reset defaults? message.
  • Page 70 The report can be sent to the PC (standard USB port) or the RS232 port. Select one of these destinations to send the report to. Typical examples of all reports are shown in appendix 7. ASL operating instructions, model CTR5000...
  • Page 71 A progress bar is shown on the bottom line of the LCD while all the data are transmitted, for example ChA ITS90 Smart 12:02:03 E s c 3 Send to comms Send probe dat a   The exact time depends on the number of channels the CTR5000 has. ASL operating instructions, model CTR5000...

  • Page 72: Options Menu

    7 Date format… Date format menu dd/mm/yy Date format (default dd/mm/yy) or mm/dd/yy 7 CTR5000/F250 Data collection interval 0.5 s (default) or 3.0 s mode… The Options menus are described in more detail in the following sections. ASL operating instructions, model CTR5000...

  • Page 73: Security

    The menus and operation of the instrument may be limited by setting security modes. For example any security mode (apart from Security Off) will not allow CTR5000 re-calibration). Higher security modes can be used to restrict access to various menus.
  • Page 74 As Low security; only the following menus are available – 1 Utilities 2 Options (security menu only) 3 Contrast The channel menus, Zero, Hold and Units options are not available. The bottom line of the LCD will display – Menus secured (Med)  ASL operating instructions, model CTR5000...

  • Page 75: Buzzer Enab

    (the LED will still be active). The instrument will still measure (and transmit) data, but the LCD backlight intensity is turned off to save power. Once the CTR5000 is in standby mode, any key-press will turn on the LCB backlight back on This menu is very similar to the Buzz enab…...

  • Page 76: Data Separator

    Select the separator then use the enter key ( ) to accept this or the Esc key to leave the current separator unchanged. 4.6.4.6 Date format The CTR5000 can display dates in the default format dd/mm/yy, or the alternative format mm/dd/yy. Selecting this menu will display – ChB ITS90...

  • Page 77: Ctr5000/F250 Mode

    The six data points are averaged. Because of the superior noise performance of the CTR5000, this is unlikely to give any real advantage, but might be useful in a noisy environment or when long cables are used.

  • Page 78: Comms Menu

    The exact appearance of this menu will depend on which comms options are fitted. 4.6.5.1 Talk on and Talk off The CTR5000 can be set to transmit the result every time a new one is available (Talk on). Set the talk status as required.

  • Page 79: Rs232 And Ieee Options

    This menu may or may not be present. The exact wording will depend on which (if any) comms options are fitted. There are no USB or LAN options. RS232 options… The CTR5000 default settings are the same as the F250’s – ChA ITS90 Pb09 12:02:03 ...
  • Page 80 Use the editor to set the address and then the enter key ( ) to accept the value (or the Esc key to leave the address unchanged). The default setting is 3. Any address in the range 0 to 31 may be used. ASL operating instructions, model CTR5000...

  • Page 81: Time And Date

    ( ) to accept the value (or the Esc key to leave the time unchanged). Date entry is similar. The real-time clock uses a small, replaceable, internal lithium battery that will last for many years. ASL operating instructions, model CTR5000...

  • Page 82: Contrast

    The screen will automatically revert to Measurement mode if no changes are made within 60 seconds. 4.6.5.6 Diagnostics Several diagnostics are available for the CTR5000. Their use is specialised. Access is restricted and a password is required to use them. ASL operating instructions, model CTR5000...

  • Page 83: Instrument Measurement Range

    Under temperature 5.2 Measurement ranges Measurement units PRT Conversion Under range Over range Units Resistance None ohms Din90 -201 +851 C (F, K) Temperature -201 +850 C (F, K) ITS90 -201 +962 C (F, K) ASL operating instructions, model CTR5000...

  • Page 84: Calibrating The Ctr5000

    CTR5000 Operating Instructions 6. Calibrating the CTR5000 6.1 CTR5000 reference calibration The CTR5000 bridge measurement technique used is inherently very stable and linear. However a small drift of the internal reference resistor may occur with time, making periodic re-calibration advisable.
  • Page 85 CTR5000 Operating Instructions This page is intentionally left blank ASL operating instructions, model CTR5000...

  • Page 86: Obtaining The Best From The Ctr5000 Bridge

    CTR5000 Operating Instructions 7. Obtaining the best from the CTR5000 bridge 7.1 Procedure Please observe the following to obtain the best results from your instrument – Do ensure there are no draughts or forced air flow around the instrument (e.g. from an ...

  • Page 87: Communications - Interface And Pc Commands

    CTR5000 may be fitted with an RS232 or LAN or IEEE interface. The commands are buffered by the CTR5000 (saved in order of arrival) so more than one command can be sent to the instrument without waiting for the previous one to complete.

  • Page 88: Ieee-488.2 Interface (Optional)

    The IEEE interface uses an 8-bit data bus and software protocol to transfer data in parallel. Each instrument connected to the bus must have a unique address. This address may be changed at any time using the Comms menu. The CTR5000 slave bus address has a default address of 3.
  • Page 89 <<= <CR> appears as a dot & is 0D hex <<= plus ascii in lower case Note When the IEEE address is changed (via the Comms Options menu), the instrument must be switched off and on to reset and use the new address. ASL operating instructions, model CTR5000...

  • Page 90: Rs232 Interface (Optional)

    9-pin connector The instrument has a male gender connector. The number of wires required for the connection will depend on the exact RS232 settings. Baud rate and other parameters are selectable (via the Comms… menu). ASL operating instructions, model CTR5000...

  • Page 91: Lan Interface (Optional)

    CTR5000 Operating Instructions 8.2.4 LAN interface (optional)  The LAN symbol will be permanently displayed when this interface is connected. There are no LAN options ASL operating instructions, model CTR5000...

  • Page 92: Instrument Pc Commands

    <CR><LF>. The instrument responds to all illegal or unrecognized commands with error 5. A PC icon will flash briefly on the CTR5000 display when data are received. The icon will be continuously present when the instrument is in remote mode.

  • Page 93: A Command

    = 5 selects PRT C n = 6 selects PRT D n = 7 selects PRT E n = 8 selects PRT F Initial State: n = 4 Parameters Ann: nn = any valid channel (new numbering) ASL operating instructions, model CTR5000...

  • Page 94: C Command

    Returns information string about the instrument: Manufacturer, Model, serial number, firmware version, date Syntax: Parameters: None Example: Returns, e.g. ASL,CTR5000,123456/789,V1.0,22/01/10 8.3.8 F command Function: The analogue output is not implemented on the CTR5000. Note: Always returns Error 5 ASL operating instructions, model CTR5000...

  • Page 95: H Command

    Local lockout - enables or disables the instrument front panel controls. Syntax: Ln, where n = 0 or 1 Parameters: n = 0 enables front panel (lockout OFF) n = 1 disables front panel (lockout ON) Initial State: n = 0, lockout off ASL operating instructions, model CTR5000...

  • Page 96: M Command

    = L sets PRT alternately to A then B and sends data with channel number when reading available. ab = 16 to 80, sets PRT to a switchbox channel number (if fitted). The CTR5000 channel number is always appended when this command is used (no leading channel character).

  • Page 97: N Command

    = F queries analogue setting – always returns F0 (for F250 compatibility) a = H queries the hold function - (0 = no zero set, 1 = zero set) a = L queries the remote status - (0 = OFF, 1 = ON) ASL operating instructions, model CTR5000...

  • Page 98: R Command

    = the number of the channel on the selected switchbox. Initial State: No switchbox channel selected. Note: 4 characters must be sent to form a valid command, for example SA02, SB13, SC03. Error 14 is returned if the channel is not available. ASL operating instructions, model CTR5000...

  • Page 99: T Or D Command

    Parameters: None Initial State: 8.3.22 Zn command Function: Sets the current reading to zero or returns to normal operation. Syntax: Z1 or Z0 Parameters: 1 or 0 (Z1 = ON; H0 = OFF) Initial State: ASL operating instructions, model CTR5000...
  • Page 100 CTR5000 Operating Instructions Note Commands (when valid) that disable Hold are P, A, M, T, D and ASL operating instructions, model CTR5000...

  • Page 101: Error Codes

    When in remote mode, for F250 compatibility, the error codes are – Error code Meaning / Cause Balance error/no PRT, PRT open circuit/ratio over range Temperature over range Unrecognized instruction sent Illegal argument sent Unable to track temperature change ASL operating instructions, model CTR5000...
  • Page 102 CTR5000 Operating Instructions This page is intentionally left blank ASL operating instructions, model CTR5000...

  • Page 103: Specifications

    2, (4 or 6 optionally) Input connection 5 pin DIN Expansion port (optional) CTS5000-8, CTS5000-16 (4 maximum) Measurements do not include uncertainties to the sensor. A warm-up time of 20 minutes is required to meet specification ASL operating instructions, model CTR5000...

  • Page 104: Display

    < 8 0 % R H , n o n - c o n d e n s i n g 10.6 Approvals The CTR5000 has been designed to comply with current standards and safety legislation. The instrument complies with IEC61010-1 and conforms to the low-voltage and EMC directives.
  • Page 105 CTR5000 Operating Instructions This page is intentionally left blank ASL operating instructions, model CTR5000...

  • Page 106: Cleaning And Maintenance

    CTR5000 Operating Instructions 11. Cleaning and Maintenance 11.1 Cleaning Make sure the CTR5000 is disconnected from any leads and from the mains supply before cleaning. Clean the outside of the instrument with a soft, clean cloth, slightly dampened with mild detergent.
  • Page 107 CTR5000 Operating Instructions This page is intentionally left blank ASL operating instructions, model CTR5000...

  • Page 108: Service And Warranty

    CTR5000 Operating Instructions 12. Service and Warranty CTR5000 instruments and accessories, (unless stated otherwise), are covered by a 12 month warranty on parts and labour from the date of dispatch from ASL (provided the instrument has not been damaged in use or tampered with). This warranty does not include costs incurred in returning the equipment to the factory for repair.

  • Page 109: Appendix 1 - Definitions And Terminology

    Abbreviations for platinum resistance thermometers include – (Platinum Resistance Thermometer) Pt100 (PRT with nominally 100  resistance at 0 C) (Resistance Temperature Device) vii. System accuracy refers to the overall, combined accuracy of the CTR5000 and PRT in use. ASL operating instructions, model CTR5000...

  • Page 110: Appendix 2 - Firmware Update

    14.1 Firmware updates ASL may decide to provide firmware updates from time to time. These can be downloaded from the ASL website www.aslltd.co.uk. The procedure for updating the CTR5000 is described in detail below. A PC, downloader software and USB cable are required.
  • Page 111 Select the CTR5000 Instrument option  Click on the Help button.  Select the CTR5000 option and choose Select. This will display a form with specific instructions for the download process.  Read and follow the instructions provided to update the instrument’s firmware.

  • Page 112: Appendix 3 - Callendar Van Dusen

    However, this does rely on the user knowing the coefficients A, B and C accurately and entering these into the CTR5000. It is worth noting that the coefficients vary between standards. Typical values (PRT dependent) are –...

  • Page 113: Appendix 4 - Its-90

    PRT can be terminated at almost any fixed point. This provision allows primary calibrations to be carried out with suitable PRTs over reduced ranges, and Note that each of these fixed points has an uncertainty associated with it. ASL operating instructions, model CTR5000...
  • Page 114 K (-189.3442 C) to 961.78 C. The actual range of temperatures which may be measured depends on the type and range of the PRT used. The ITS-90 scale requires the entry of 6 constants into the CTR5000 before the instrument can accurately convert resistance to temperature for a particular PRT.

  • Page 115: Appendix 5 - Din Standard

    A = 3.90823 x 10 B = -5.7750 x 10 C = -4.1830 x 10 The CTR5000 will provide accurate resistance to temperature conversion based on these values when DIN90 conversion is selected for a probe. 17.2 DIN 43760 1980 (IEC 751) The DIN standard uses defined values for the conversion of resistance to temperature using the Callendar van Dusen equation.

  • Page 116: Appendix 6- Ac Bridge Operation

    CTR5000 Operating Instructions 18. Appendix 6– AC Bridge operation 18.1 AC Bridge basics The CTR5000 Bridge measures the voltage (V ) developed across the unknown sensor resistance (R ) and the voltage (V ) across a stable internal reference resistance (R ).
  • Page 117 Since the balance point depends only on the ratio of the transformer turns to the unknown resistance, the measurement is precise and unaffected by drift. ASL operating instructions, model CTR5000...

  • Page 118: Appendix 7- Report Examples

    Probe Undefined,Passive probe,DIN90 Tmax,+851.0,Tmin,-201.0 Units,None Set Ref R,100 Channel,03,Type,Internal,C Conversion,DIN90 Probe Undefined,Passive probe,DIN90 Tmax,+851.0,Tmin,-201.0 Units,None Set Ref R,100 Channel,16,Type,S252,16,Serial number,123/456789 Conversion,DIN90 Probe Undefined,Passive probe,DIN90 Tmax,+851.0,Tmin,-201.0 Units,None Set Ref R,100 Report continues to end of connected channels ASL operating instructions, model CTR5000...

  • Page 119: Assigned Probes Report

    CTR5000 Operating Instructions 19.2 Assigned probes report CTR5000 Serial number,123/456789 Recal. date,22/02/11 Date,23/01/10,Time,13:34:10 Probe no,41 Probe id, Conversion,DIN90 Assigned to channel,03,Tmax,323.1,Tmin,-200.1, Units,None Set,R0=+100.0000,A=+3.90830x10-03,B=-5.77500x10-07,C=-4.18300x10-12, All other probes are unassigned ASL operating instructions, model CTR5000...

  • Page 120: All Probes Report

    Conversion,DIN90 Unassigned,Tmax,555.2,Tmin,-200.1 Units,None Set,R0=+100.0000,A=+3.90830x10-03,B=-5.77500x10-07,C=-4.18300x10-12, Probe no,02 Probe id, Conversion,DIN90 Unassigned,Tmax,555.2,Tmin,-200.1 Units,None Set,R0=+100.0000,A=+3.90830x10-03,B=-5.77500x10-07,C=-4.18300x10-12, Probe no,41 Probe id, Conversion,DIN90 Assigned to channel,03,Tmax,123.4,Tmin,-20.2, Units,None Set,R0=+100.0000,A=+3.90830x10-03,B=-5.77500x10-07,C=-4.18300x10-12, Probe no,72 Probe id, Conversion,DIN90 Unassigned,Tmax,533.1,Tmin,-200.1 Units,None Set,R0=+100.0000,A=+3.90830x10-03,B=-5.77500x10-07,C=-4.18300x10-12, All other probes are unassigned ASL operating instructions, model CTR5000...

  • Page 121: Instrument Report

    CTR5000 Operating Instructions 19.4 Instrument report CTR5000 Serial number,123/456789 Recal. date,22/02/11 Date,23/01/10,Time,13:39:45 S/W version,V0.1 Date format,dd/mm/yy 100R reference,99.998 200R reference,199.992,400R reference,399.999 Channels available,A,B,C,D S252's present,1 S252,1,S/W version,0.00,Channels,16-31,Serial number,123/45678,PCB,123/45678,Built, 23/01/10,Used,4 Interfaces RS232 ASL operating instructions, model CTR5000...

  • Page 122: Smart Probe Report

    Next cal date,01/01/11 Cal type,2,ITS90 Probe type,0,PRT Wire type,0 Source,ASL-CTR5000 R_max,-1 R_min,0 R_max since,-1 R_min since,0 R_max ever,-1 R_min ever,0 Units,1,R Reference R,0,100R T conversion,0,DIN90 R0.01,+100.0000 Ap,3.90830e-03 Bp,-5.77500e-07 Cp,-4.18300e-12 Dp,0.00000e+00 An,0.00000e+00 Bn,0.00000e+00 WT90,0.00000e+00 Cal log count,00 ASL operating instructions, model CTR5000...

  • Page 123: Index

    Front panel ......21 Measurement principles ... 15 ITS-90 ......113 Function keys Measurement ranges ..83 CTR5000 vs F250 ....14 Chan ........ 23 Measurement units .... 15 CvD ....17, 83, 103, 112 Escape ......23 Hold ........23 Menu ........
  • Page 124 P command..... 97 Resolution ......34 Q or ? command .... 97 RS232 interface ....90 R command ....98 RS232/LAN/IEEE 488 options Zero key ......33 S command ..... 98 .......... 28 Syntax ......92 ASL operating instructions, model CTR5000...

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