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Ludlum Measurements 30 Series Manual

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Model 30 Series Digital Survey Meter
Ludlum Measurements
June 2022
Serial Number: 25024424 and Succeeding
Firmware: F.3.1.4549 and Higher

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  • Page 1 Model 30 Series Digital Survey Meter Ludlum Measurements June 2022 Serial Number: 25024424 and Succeeding Firmware: F.3.1.4549 and Higher...
  • Page 3 Model 30 Series Digital Survey Meter Ludlum Measurements June 2022 Serial Number: 25024424 and Succeeding Firmware: F.3.1.4549 and Higher...
  • Page 5 STATEMENT OF WARRANTY Ludlum Measurements, Inc. warrants the products covered in this manual to be free of de- fects due to workmanship, material, and design for a period of twelve months from the date of delivery. The calibration of a product is warranted to be within its specified accuracy lim- its at the time of shipment.

  • Page 7: Table Of Contents

    ONTENTS Contents List of Figures List of Tables 1 Introduction 2 Features 3 Quick Reference Instrument Front Diagram ....... 15 Instrument Rear and Sides Diagram .
  • Page 8 A.2.2 Specifications ........70 Ludlum Measurements, Inc.

  • Page 9: Contents

    CONTENTS A.3 Model 30-7 and 30-7B ........70 A.3.1 Detector .

  • Page 11: List Of Figures

    IST OF IGURES Startup display with all LCD segments shown..... . . 20 Firmware version display........21 Battery voltage display.

  • Page 13: List Of Tables

    IST OF ABLES ..........13 COUNT mode uits .

  • Page 15: Introduction

    This instrument is used with an external detector for alpha, beta, gamma or neutron radiation survey. Three modes of operation are available for the Model 30 Series - RATE, MAX rate, and COUNT. • RATE mode operation will display the current count, exposure, or activity rate.

  • Page 17: Features

    EATURES HV Range: 400-1500 Vdc Threshold: 2-200 mVdc (calibrated range) Fault Detection: • Overload Protection • Loss of Count Protection • Over Range • Calibration Expiration Lockout LCD Display: 3-digit with 13.4 mm (0.53 in.) digits Available Display Range: auto-ranging, maximum and minimum display can be set to limit display to calibrated range.
  • Page 18 Environmental Rating: NEMA (National Electrical Manufacturers Association) rating of 3x or IP (Ingress Protection) rating of 52 with audio hole seal option Temperature Range: -20 to 50 °C (-4 to 122 °F), may be certified for operation from -40 to 65 °C (-40 to 150 °F) Ludlum Measurements, Inc.

  • Page 19: Quick Reference

    UICK EFERENCE 3.1 Instrument Front Diagram...

  • Page 20: Instrument Rear And Sides Diagram

    CHAPTER 3. QUICK REFERENCE 3.2 Instrument Rear and Sides Diagram Ludlum Measurements, Inc.

  • Page 21: Instrument Internal Diagram

    3.3. INSTRUMENT INTERNAL DIAGRAM 3.3 Instrument Internal Diagram June 2022...

  • Page 23: Getting Started

    ETTING TARTED 4.1 Unpacking and Repacking Remove the calibration certificate and place it in a secure location. Remove the instrument and ensure that all of the items listed on the packing list are in the carton. Check individ- ual item serial numbers and ensure calibration certificates match between instruments and detectors (if applicable).

  • Page 24: Instrument Use And Controls

    If any LCD segments are non-functioning, or audio fails to work, the device is in need of repair. (See the following figure.) If alarm volume is set to zero, there will be no power on audio. Figure 4.1: Startup display with all LCD segments shown. Ludlum Measurements, Inc.

  • Page 25: Firmware Version Display

    4.5. INSTRUMENT POWER ON SEQUENCE The instrument displays the firmware version. Figure 4.2: Firmware version display. Next, the instrument will display the current battery voltage. Figure 4.3: Battery voltage display. The instrument will then move to normal operation. June 2022...

  • Page 27: Normal Operation

    ORMAL PERATION Normal operation begins immediately after power-on sequence. The device will display unit 1 of the first enabled mode (Mode order: Rate, Max Rate, Count). If a fault condition is present, it will immediately change to the fault state as long as the fault is active. 5.1 Buttons OK: The functionality of this button varies depending on the active mode.

  • Page 28: Display Units

    RATE/MAX mode and another set of set-points for COUNT mode per display unit. An alarm has a higher priority than an alert. Acknowledging an alert will not cause acknowl- edgement of the alarm. Acknowledgement of an alarm will acknowledge an alert as well. Ludlum Measurements, Inc.

  • Page 29: Rate Mode

    5.5. RATE MODE Both the alert and the alarm are automatically re-armed when the readings fall below their respective thresholds. OK button: When a new alert and/or alarm is tripped, a press of the OK but- ton will acknowledge the alert and/or alarm to silence the audio instead of the normal mode specific function.

  • Page 30: Max Mode

    Auto-Slow or Fixed-Fast and Fixed-Slow. Within 2 seconds, the new response rate will be displayed on the screen. If the response time is user defined, a long press of the MODE button is ignored. Alerts and alarms in MAX mode latch with the display Ludlum Measurements, Inc.

  • Page 31: Count Mode

    5.7. COUNT MODE Figure 5.4: MAX mode display. 5.7 COUNT Mode The purpose of COUNT mode is to count for a predetermined amount of time, and to show the results on the display. Note that the predetermined count time can be from 1 second to 3600 seconds, or can be set to zero to enable continuous counting until stopped by the user.

  • Page 32: Entering Count Mode From Another Mode Or Changing Units Within Count Mode

    3. Results: Results will be displayed when countdown is finished if count time is greater than 0. If count time is 0, this will show a live total/average (depending on the display units) until reset. Alerts/alarms are armed. Figure 5.7: COUNT mode results. Ludlum Measurements, Inc.
  • Page 33 5.7. COUNT MODE OK button: The function of the OK button varies depending on the current state of count mode. If there are alerts/alarms, the alert/alarm acknowledge- ment takes precedent and will register the button press instead (see Alerts and Alarms on page 24).

  • Page 35: Fault Detection

    AULT ETECTION 6.1 Instrument Faults This instrument has several faults it can report to the user. A fault is signified by flashing in order of the red, orange, and green LEDs in addition to a unique fault tone. The display will also cycle through the active faults.

  • Page 36: Detector Over Range

    6.1.4 Calibration Expiration If the calibration expiration lockout is enabled, the instrument will flash "CAL" when cali- bration is past due. DIP switch must be enabled. See Chapter 8, Calibration Lockout on page 56 for more information. Ludlum Measurements, Inc.

  • Page 37: Date (Real Time Clock) Reset

    6.1. INSTRUMENT FAULTS Figure 6.4: Fault - Calibration Expired. 6.1.5 Date (Real Time clock) Reset If the calibration expiration is enabled, the instrument will display "dAt" if the internal clock has been reset. Software is required to reset the clock. Figure 6.5: Fault - Date Reset.

  • Page 39: Configuration

    Incorrect settings could jeopardize the safety of users depending on this instrument. Your instrument has been shipped from Ludlum Measurements only after passing electronic checkout, a 24-hour burn-in process, and a careful calibration process. Calibration papers are supplied with each instrument shipped from Ludlum Measurements.

  • Page 40: Setup Menu Introduction

    To enter setup mode through the quick access method, long press the UNIT and MODE but- tons (see figure 7.2). The last accessed setup group will be displayed. All other functions of setup mode will be normal. Figure 7.2: Menu Short Cut Ludlum Measurements, Inc.

  • Page 41: Exit Setup Mode

    7.5. EXIT SETUP MODE Quick access to setup mode is not available while in any fault condition. 7.5 Exit Setup Mode There are two ways to exit setup mode. 1. Long press UNIT button to exit from page selection. Changes are saved in non-volatile memory.

  • Page 42: Setup Menus

    7.7 Setup Menus 7.7.1 Menu Map Detector - "dEr" 1. HV 2. Current Overload 3. Response Time/Auto Response Rate 4. User Defined Count Time 5. Enabled Modes 6. Audio Divide Channel 1 - "Ch1" 1. Cal Constant Mantissa Ludlum Measurements, Inc.
  • Page 43 7.7. SETUP MENUS 2. Cal Constant Exponent 3. DTC1 4. DTC2 Mantissa 5. DTC2 Exponent 6. Threshold 7. Loss of Count Time Unit 1 - "U-1" 1. Rate Unit and Minimum Display Exponent 2. Rate Maximum Display Exponent 3. Rate/Max Alert 4.

  • Page 44: Setup Group (Det) - Detector

    • Hundreds Place (0-9) • k Multiplier (on/off) Range: 300-1600 V The k multiplier also activates left-most decimal point. If the k multiplier is used, the Hundreds Place value is limited to 0 and 1 (showing thousands value) Ludlum Measurements, Inc.
  • Page 45 7.7. SETUP MENUS Detector Current Overload Threshold - Defines the current limit of the detector. If the de- tector pulls more current from the high voltage, the over-current fault is activated. Setting the detector current overload threshold to 0 disables the current overload fault. Configurable positions are: •...

  • Page 46: Setup Group (Ch1) Channel 1

    R. This setting is only used if a display unit of R, R/h, Sv, Sv/h, rem, or rem/h are selected. This is the decimal portion of the value. Configurable positions are: • Ones Place (0-9) Ludlum Measurements, Inc.
  • Page 47 7.7. SETUP MENUS • Tens Place (0-9) • Hundreds Place (0-9) Combined Range of Calibration Constant Mantissa and Exponent: 100E0-999E10 It may be possible to input 010 or some number less than 100, and then change the exponent to 00. The instrument will automatically correct this to 100E00. Calibration Constant Exponent - Value is used with Calibration Constant Mantissa to ex- press counts per R.
  • Page 48 ). For example, with the same detector as above with an area of 15 , and starting with and efficiency value of 10%, then the parameter could be changed to 150% to measure in Bq/cm Configurable positions are: • Ones Place (0-9) • Tens Place (0-9) Ludlum Measurements, Inc.

  • Page 49: Setup Group (U-1) - Display Unit

    7.7. SETUP MENUS • Hundreds Place (0-9) • Number of Decimal Place (0 or 1) Range: 00.1 to 999% Discriminator Threshold - Defines the discriminator threshold voltage for counting. Pulses above this level will be counted. Value is represented in mV. Configurable positions are: •...

  • Page 50: Display Unit Rate/Max Minimum Values

    Available decimal points/prefix combinations Units X.XX XX.X Sv/h X.XX m XX.X m XXX m rem/h X.XX XX.X dpm Bq X.XX XX.X cpm cps X.XX k XX.X k XXX k X’s can be replaced with any number for 0 to 9. Ludlum Measurements, Inc.
  • Page 51 7.7. SETUP MENUS Range must provide at least two orders of magnitude between minimum and maximum value. Display Unit 1 RATE/MAX Mode Alert Point - Defines the value of the display unit 1 in RATE or MAX modes. When this level is exceeded, the yellow LED will be on and alert tone will sound.

  • Page 52: Display Unit Count Minimum Values

    ALARM symbol will flash. This value should be above the minimum display value. If an alert is also enabled, the alarm level should be above the alert level. Set this to 000 to disable. Configurable positions are: Ludlum Measurements, Inc.

  • Page 53: Setup Group (U-2) - Display Unit 2

    7.7. SETUP MENUS • Ones Place (0-9) • Tens Place (0-9) • Hundreds Place (0-9) • Decimal Point and Prefix (see previous table) Display Unit Radiation Icon - Configures the radiation icon that will be active when display unit 1 is selected. This setting has no other effect. Configurable positions are: •...

  • Page 54: Setup Group (Ins) - Instrument

    If Display Unit 2 Count unit is set to "oFF," this setting will be skipped. Display Unit 2 Radiation Icon - See Display Unit 1 Radiation Icon. 7.7.6 Setup Group (InS) - Instrument Figure 7.8: Setup Group - Instrument. Ludlum Measurements, Inc.
  • Page 55 7.7. SETUP MENUS Audio Mode - Defines the enabled activity audio mode. This instrument has three audio modes to choose from. • "cLc" - Standard click audio. This mode will produce a cluck for every detected pulse. If pulses are too fast, this can become a solid tone. Click audio is best for continuous feedback.
  • Page 56 • "I:on" - on while powered internally • "I:bL" - blink while powered internally • "E:Ib" - on while powered externally, blink while powered internally Configurable positions are: Modes: ("oFF," "on," "bL," "E:on," "I:on," "I:bL," and "E:Ib") Ludlum Measurements, Inc.

  • Page 57: Setup Group (Rtc) - Real Time Clock

    7.8. DIP SWITCHES 7.7.7 Setup Group (rtc) - Real Time Clock Figure 7.9: Setup Group - Real Time Clock. Month - Only view the current month setting in the device clock. Day - Only view the current day setting in device clock. Year - Only view the current year setting in device clock.

  • Page 59: Advanced Features

    DVANCED EATURES 8.1 Dead Time Correction All pulse counting detectors have a "dead time" in which the detector is unable to register another event. In relatively low fields this is not an issue. However, as the field strength approaches the high end of the detector’s range, dead time causes the pulse rate to become non-linear with respect to the real radiation field.

  • Page 60: R To Sv Conversion

    The user will be notified of a reset clock by the date fault (see page 33) upon power-on after new batteries are installed. Ludlum Measurements, Inc.

  • Page 61: Variable Led Brightness

    8.4. VARIABLE LED BRIGHTNESS 8.4 Variable LED Brightness This instrument uses s sensor that detects the ambient light level. The ambient light is then converted into three states - dark, medium, and bright. Each state affects the brightness of the device LEDs to provide daytime visibility as well as prevent blinding nighttime viewing. A bright state will cause maximum intensity of the status indicator LEDs if they are on.

  • Page 62: Software Calibration Tools

    Device - Serial Number: This should match the serial number of the instrument. Detector - Model: This can store the model of the detector the instrument was calibrated for. Detector - Serial Number: This can store the serial number of the detector the instrument was calibrated for. Ludlum Measurements, Inc.

  • Page 63: Real-Time Streaming

    8.11. REAL-TIME STREAMING 8.11 Real-time Streaming Lumic Calibration software and this instrument have the ability to stream data from the in- strument to a computer. The data can be viewed live inside software or can be recorded to a file. Multiple user-selected parameters can be streamed simultaneously, including: •...

  • Page 65: Specifications

    PECIFICATIONS 9.1 Instrument HV Range: 400-1500 Vdc Threshold: 2-200 mVdc (calibrated range) Resolving Time: approximately 5 sec as defined by IEC 60325 Overload: 5-100 A Loss of Count Timeout: 0-9.99k seconds (0 to disable) On Device Setup: Check or configure primary operating parameters without the need of a computer Display Range: all auto-rangeable maximum displays can be set to limit the display to cali- brated range...

  • Page 66: Auto Response Times (In Seconds)

    IP (Ingress Protection) rating of 52 with audio seal option Size: 8.5 x 8 x 4.7 cm (3.45 x 3.1 x 1.9 in.) instrument only Weight: 174 g (0.38 lb) instrument only, including batteries Construction: high-impact plastic with water-resistant rubber seals and separate battery compartment Ludlum Measurements, Inc.

  • Page 67: Safety Considerations

    The operator or responsible body is cautioned that the protection provided by the equipment may be impaired if the equipment is used in a manner not spec- ified by Ludlum Measurements, Inc. Verify instrument voltage input rating before connecting to a power converter.

  • Page 68: Cleaning And Maintenance Precautions

    Observe the following precautions when cleaning or performing maintenance on the instrument: 1. Turn the instrument OFF and remove the batteries. 2. Allow the instrument to sit for one minute before cleaning the exterior or accessing any internal components for maintenance. Ludlum Measurements, Inc.

  • Page 69: Revision History

    ISTORY This section of the manual will be updated with each revision of the manual in order to document changes over time. Ludlum Measurements’ policy is to provide free software upgrades to instruments for the life of the instrument. July 2016: New manual.

  • Page 71: Recycling

    To this end, Ludlum Measurements, Inc. strives to supply the consumer of its goods with information regarding reuse and recycling of the many different types of materials used in its products.

  • Page 73: A Model 30 Variations A.1 Model 30-4

    30 V ODEL ARIATIONS A.1 Model 30-4 A Model 30-4 is a Model 30 Digital Display Unit paired with a neutron detector. The range is 0-100 mSv/h (0-10,000 mrem/hr). The display unit detaches for greater versatility. A.1.1 Detector He proportional detector is 1.6 x 2.5 cm (0.6 x 1.0 in.) (Dia x L) and is surrounded by a 22.9 cm (9.0 in.) diameter cadmium- loaded polyethylene sphere.

  • Page 74: Detector

    The Model 30-7 also has a total weight of just over 3.8 kg (8.5 lb). The Model 30-7B is a variation of the Model 30-7 with a different inner shell. It has better energy response, but less sensitivity. Ludlum Measurements, Inc.

  • Page 75: Detector

    A.3. MODEL 30-7 AND 30-7B The detachable display unit has an adjustable viewing angle and a range of 0-100 mSv/h (0-10,000 mrem/h). A.3.1 Detector He proportional detector typically has a sensitivity of 10 cpm per Sv/h (100 cpm per mrem/hr) (bare AmBe neutrons) with a linearity reading within 10% of actual value.

  • Page 77: B Typical Values

    YPICAL ALUES The following table describes the typical values for various Ludlum’s detectors. These values can NOT be used as a replacement for real calibration. They may be used as a starting point for manual calibration. Model Model Model Model Alpha or 42-31H Setting...
  • Page 78 10 (disabled for Model 30) Internal Power Switch rtc:1 Real Time Clock Month rtc:2 Real Time Clock Day rtc:3 Real Time Clock Year rtc:4 Real Time Clock Hour rtc:5 Real Time Clock Minute rtc:6 Real Time Clock Second Ludlum Measurements, Inc.

  • Page 79: C All Paramters

    ARAMTERS The following table is a list of all settings available on the device. Many of these can only be accessed through Lumic Calibration software. Min. Max. Setup Name Description Value Value Menu rtc:1 Month Month for the real-time clock on the instrument. rtc:2 Day for the real-time clock on the instrument.
  • Page 80 A value of 0 will disable this alarm. Alarm Threshold R/h, Sv/h, Display rem/h, cpm, cps, dpm, Bq, Unit 1 U-1:5 Defines the display units used for COUNT mode. Count rem, Units counts, disin- tegrations Ludlum Measurements, Inc.
  • Page 81 Min. Max. Setup Name Description Value Value Menu Display Unit 1 Defines the minimum exponent allowed for a U-1:5 COUNT given display unit. Ex. 0 with a display unit of (cont.) Minimum cpm would yield a minimum display of 000 cpm. Display Software simplifies this setting.
  • Page 82 Virtual long press of the UNIT button. Long MODE Button Virtual long press of the MODE button. Long Battery (read only) Operating voltage of the processor. Voltage (Vcc) (read only) Supply Operating voltage of the processor. Voltage Ludlum Measurements, Inc.
  • Page 83 Min. Max. Setup Name Description Value Value Menu Tempera- (read only) Temperature of the instrument. ture Ambient (read only) Ambient light reading of the instrument. Light Instrument charac- Stores the model name of the instrument. Name ters) Instrument charac- Serial Stores the serial number of the instrument.
  • Page 84 Calibration instrument high voltage calibration. Rate First order calibration coefficient for instrument Calibration high voltage calibration. Slope Calibration offset for instrument high voltage Calibration calibration. Offset Threshold Second order calibration coefficient for Calibration instrument threshold calibration. Rate Ludlum Measurements, Inc.
  • Page 85 Min. Max. Setup Name Description Value Value Menu Threshold First order coefficient for instrument threshold Calibration calibration. Slope Threshold Calibration offset for instrument threshold Calibration -.005 .005 calibration Offset Automatic Delay in seconds the instrument will wait if InS:3 Shutdown transitioning from internal to external power.
  • Page 86 1/16th second. Intended for streaming Unit 2 only. Floating-point number only, does not Measured include unit. Does not have to be active on Count device display. Display Unit 2 Unit for streaming measured COUNT rates. Count Unit Ludlum Measurements, Inc.

  • Page 87: D Errata

    RRATA D.1 Firmware Known Issues F1.9.4268 Issue Date fault triggered every time batteries are removed. Description When battery power is removed long enough for clock to reset, device will show date fault ("dAt") even if calibration expiration DIP switch is turned off.

  • Page 89: E Assembly Drawings

    SSEMBLY RAWINGS If replacement parts are needed, call Ludlum Measurements, Inc. One of our salespeople will be happy to assist you. The following drawings are provided to assist in finding the correct part. Drawing Description Page 498 x 512 Model 30 Dimensions...

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