Test equipment dose calibrators · AtomLab family

Biodex AtomLab 500: troubleshooting and error codes

The ServiceForge knowledge base holds 86 documented symptoms for the Biodex AtomLab 500, with 124 ranked causes, 238 diagnostic checks with test points and expected values, and 16 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Calibration: Isotope list management radiation

Configure isotope list, routine isotopes, button assignments, dial values, and sealed sources for dose calibrator measurement operations.

Ranked causes

1. Need to select current isotope from full list (common)
2. Need to configure routine isotopes list (common)
3. Need to assign isotopes to measurement screen buttons (common)
4. Need to add custom isotope to isotope list (occasional)
5. Need to remove custom isotope from list (occasional)
6. Need to change isotope dial values (common)
7. Need to set QA test acceptance variance (occasional)
8. Need to configure sealed sources (common)

First check

Navigate to Select Current Isotope screen

Test point: Home > Utilities > Dose Calibrator Configuration > Isotope List
Expected: Isotope List screen displayed after password entry

7 more checks with pass and fail actions, 14 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Y-90 dial setting determination

Establishing correct AtomLab 500 dial setting for Y-90 activity measurement in plastic syringes, starting from radiopharmacy reference dose and adjusting within acceptable tolerance range.

Ranked causes

1. Initial dial setting selection and constancy verification (common)
2. Dial value within acceptable range (common)
3. Dial value outside acceptable range (occasional)
4. Acceptability of calculated error sum (common)

First check

Obtain decay-corrected Y-90 activity from radiopharmacy

Test point: Y-90 dose vial or syringe label
Expected: Activity value in mCi or other stated unit

10 more checks with pass and fail actions, 6 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

System will not power up

Dose calibrator does not boot; no display response when power switch activated.

Ranked causes

1. ON/OFF switch not turned ON (common)
2. Power cord not plugged in (common)
3. Power supply issue or internal reset needed (occasional)
4. Incorrect outlet voltage (occasional)

4 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Unit does not power up

Atomlab dose calibrator fails to start; display does not boot.

Ranked causes

1. On/Off switch not activated (common)
2. Power cord not connected to display (common)
3. Power cord not seated in power pack receptacle (common)
4. Incorrect outlet voltage (occasional)

First check

Verify on/off switch position

Test point: Display on/off switch
Expected: Switch in ON position

3 more checks with pass and fail actions, 4 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Activity measurement fluctuations radiation

Display shows unstable or varying activity values after isotope insertion and calibration key selection

Ranked causes

1. Normal electrometer averaging at low activity levels (common)
2. High calibration value causing electrometer gain increase and noise amplification (common)
3. Mo-99 normal high initial fluctuations during averaging (common)

First check

Observe activity display after isotope insertion and calibration selection

Test point: Display screen
Expected: Display stabilizes after short time with expected fluctuations per isotope

1 more check with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Dial value adjustment for isotope

Determining modified dial value for isotope using known activity sample; accounts for configuration, container, and material variations

Ranked causes

1. Need to adjust dial value for different sample configurations (common)
2. Variation in wall thickness and material affects Beta sample activity (common)
3. F-18 dial setting modification for Ge-68/F-18 source (occasional)

First check

Access dial value adjustment screen

Test point: User interface
Expected: Dial Value Adjustment screen displayed (Figure 5.3)

1 more check with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Dose calibrator setup and environmental conditions radiation

Installation planning and environmental requirements for optimal measurement accuracy and radiation safety

Ranked causes

1. Improper work surface or location affecting measurement accuracy (common)
2. Inadequate detector well setup or liner missing (common)
3. Improper sample handling increasing radiation exposure (occasional)

First check

Verify work surface stability and load capacity

Test point: Tabletop
Expected: Free of vibration, does not wobble, supports 300 pounds

6 more checks with pass and fail actions, 4 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Wide window QA verification radiation

Verify wide window count rate, efficiency and ROI settings for Cs-137 isotope in dose calibrator

Ranked causes

1. Wide window calibration drift or misconfiguration (occasional)
2. ROI setting out of specification (occasional)
3. Wide window efficiency drift (occasional)

First check

Measure wide window net count

Test point: Wide window counter
Expected: 40 DPM

4 more checks with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Environmental operating conditions compliance

Temperature and humidity within specified ranges for optimal dose calibrator performance

Ranked causes

1. Operating environment outside specified temperature range (occasional)
2. Operating environment outside specified humidity range (occasional)
3. High ambient radiation level (occasional)

First check

Verify ambient temperature

Test point: Operating environment
Expected: 10 to 30°C

2 more checks with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Measurement accuracy affected by container type or wall thickness

Isotope measurement accuracy depends on sample container material, volume, and wall thickness, particularly for low-energy photon emitters.

Ranked causes

1. Container material or thickness differs from NIST calibration standard (occasional)
2. Standardized container not used consistently (occasional)
3. Low-energy photon isotopes (I-125, I-123, Xe-133) affected by wall thickness (common)

First check

Verify sample container matches NIST calibration standard

Test point: Container physical specification
Expected: 5 ml liquid in sealed borosilicate glass ampoule (0.6 mm wall thickness) or plastic syringe as per NIST reference

1 more check with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Activity display fluctuations

Reading varies or oscillates at low activity levels after isotope insertion

Ranked causes

1. Normal stabilization period (common)
2. High calibration value noise amplification (occasional)

First check

Monitor display for stabilization

Test point: Activity display reading
Expected: Reading stabilizes within a few seconds

1 more check with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Atomlab 500 dose calibrator measurement verification radiation

Verify measurement accuracy and response time for radioactive isotope measurements across specified activity ranges

Ranked causes

1. Factory calibration verification for isotope measurement accuracy (common)
2. Response time verification across activity ranges (common)

First check

Measure known Tc-99m source activity

Test point: Well detector
Expected: Within 3% or 0.3 µCi of actual activity, whichever is greater, +/-3%
Tools: Tc-99m calibration source, reference activity

3 more checks with pass and fail actions, 4 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Constancy radiation

Daily reproducibility check of dose calibrator measurements using long-lived reference source with decay correction

Ranked causes

1. Cs-137 reference source activity drift or contamination (common)
2. Dose calibrator measurement error (occasional)

First check

Press Zero Background button to zero background radiation

Test point: Dose calibrator display
Expected: Display zeroes and background is automatically adjusted

3 more checks with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Constancy test radiation

Daily reproducibility measurement of same source with decay correction using Cs-137 reference source

Ranked causes

1. Constancy measurement exceeds 5% of predicted activity (unknown)
2. Constancy result exceeds 10% of predicted activity (rare)

First check

Press Zero Background button

Test point: Zero Background (Bkgnd) button
Expected: Display zeroes

2 more checks with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Determine dial value adjustment for isotope patient safety

Measure activity of known isotope sample to establish or modify dial value setting, especially for Beta isotopes in different configurations or Ge-68/F-18 sources

Ranked causes

1. Beta isotope samples vary by configuration or pharmacy source (common)
2. F-18 dial setting requires adjustment for NIST traceable Ge-68/F-18 source (occasional)

First check

Select correct isotope

Test point: Isotope key selection
Expected: System recognizes selected isotope and applies corresponding dial value

4 more checks with pass and fail actions, 4 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Geometry Test radiation

Verify that the dose calibrator correctly measures activity at different volumes as a dose is diluted, ensuring geometry independence (indicated activity does not change with volume or configuration).

Ranked causes

1. Need to verify volume-dependent measurement accuracy (common)
2. Need to establish baseline normalized volume (common)

First check

Select isotope for test

Test point: Geometry Test screen
Expected: Defaults to first isotope on button list, usually Tc-99m

9 more checks with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Linearity radiation

Test proportionality of dose calibrator measurement results across intended activity range using Tc-99m decay

Ranked causes

1. Mo-99 contamination in Tc-99m sample affects low-activity measurements (occasional)
2. Dose calibrator nonlinearity error exceeds ±5 percent (rare)

First check

Zero background radiation using Zero Background button

Test point: Dose calibrator display
Expected: Display zeroes

5 more checks with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Lineator Test radiation

Comparison of initial linearity factors with current factors to verify dose calibrator accuracy within ±5% tolerance. Performed at installation and quarterly thereafter.

Ranked causes

1. Linearity drift or degradation (unknown)
2. Linearity drift or degradation (>55 mCi range) (unknown)

First check

Access Linearity Test function from QA menu

Test point: QA Dose Calibrator menu
Expected: Linearity Testing screen displayed

7 more checks with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Communications error caution

Error code 7 displayed; detector offline, repeated communication attempts failed

Ranked causes

1. Bad detector or disconnected/faulty cable (common)
2. Defective detector (occasional)

2 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Linearity test shows correction factor <0.90 or >1.10 radiation

Calibrator may be non-linear or contaminated; requires diagnostic testing and vendor contact

Ranked causes

1. Mo-99 contamination in Tc-99m sample (occasional)
2. Dose calibrator non-linearity or malfunction (occasional)

First check

Review cf_m values for declining trend at low activity measurements after >48h decay period

Test point: Linearity form data at lowest M values
Expected: Stable or increasing cf_m; declining cf_m suggests Mo-99 contamination

1 more check with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Accuracy test radiation

Determine dose calibrator's absolute error using NIST-traceable reference sources with different principal photon energies

Ranked causes

1. Deviation in dose calibrator measurement accuracy from NIST standard (common)

First check

Zero dose calibrator background

Test point: Dose calibrator display
Expected: Display reads zero after pressing Zero Background button
Tools: Dose calibrator

6 more checks with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Attenuation Tube (Sleeve) Method for Linearity radiation

Alternative linearity test using lead sleeves or attenuators of various thicknesses to simulate activity decay

Ranked causes

1. Mo-99 contamination causes failure at low activity with sleeve method (occasional)

First check

Perform Decay Method linearity test first to establish baseline

Test point: Tc-99m sample activity over decay period
Expected: cfM values 0.95-1.05 or acceptable per criteria

2 more checks with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Calicheck Linearity Test radiation

Periodic verification of dose calibrator measurement accuracy using Calicheck test vials with black and red tubes

Ranked causes

1. Calibration verification required at installation and quarterly intervals (common)

First check

Access Calicheck Test function

Test point: QA Dose Calibrator menu
Expected: Linearity Testing screen displayed

7 more checks with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Co-60 reference dial value setting radiation

Establish baseline dial value for Co-60 isotope as reference standard

Ranked causes

1. Co-60 selected as reference isotope for detector calibration (common)

First check

Confirm Co-60 reference dial value

Test point: Dial valueCo-60
Expected: 5.0
Tools: Calibration manual

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Constancy verification radiation

Daily constancy check using long-lived reference source (Cs-137) with decay correction to verify reproducibility of dose calibrator measurements over time.

Ranked causes

1. Need to verify measurement reproducibility (common)

First check

Touch Zero Background button

Test point: Display
Expected: Display zeroes and background is automatically adjusted

3 more checks with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Container correction factor determination radiation

Correction factor or corrected dial value may be needed when container wall thickness or material differs significantly from NIST standards used in dose calibrator calibration.

Ranked causes

1. Container configuration differs from NIST standards (occasional)

First check

Assess container specification

Test point: Container material and wall thickness
Expected: Matches NIST standard configuration or documented difference recorded

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Container Dial Value (CDV) for unsealed sources radiation

Determine accurate CDV for isotope measurements in non-standard source containers (vial, syringe) to ensure displayed activity reflects true measurement

Ranked causes

1. Source container composition differs from calibration reference (plastic syringe with 1mm wall) (common)

First check

Assay isotope source in standard plastic syringe

Test point: Supplied source dipper syringe support
Expected: Activity reading for standard container
Tools: AtomLab 500 dose calibrator, standard plastic syringe

3 more checks with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Container Dial Value determination radiation

Procedure to determine appropriate Dial Value (DV) for accurate measurement of unsealed sources when container type changes from standard plastic syringe.

Ranked causes

1. Container type differs from standard plastic syringe (occasional)

First check

Assay isotope source in standard plastic syringe

Test point: Dose calibrator display
Expected: Activity reading recorded as baseline (Plastic Syringe Activity)
Tools: Dose calibrator, plastic syringe nominal 1mm wall thickness

1 more check with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Container Dial Value for container with pre-loaded source radiation

Determine CDV when isotope source is already in the target container at start of calibration procedure

Ranked causes

1. CDV required for container type with isotope already present (occasional)

First check

Assay container with isotope source material present

Test point: Supplied source dipper or appropriate holder
Expected: Activity reading for loaded container
Tools: AtomLab 500 dose calibrator, set DV to published value

3 more checks with pass and fail actions are in ServiceForge. Connect ServiceForge to your AI

Calibration: Decay activity calculation using calculator method radiation

Procedure to calculate decayed activity of a radioisotope between calibration and measurement times using a scientific calculator with Y^x function

Ranked causes

1. Need to determine decayed activity for radioisotope measurement (common)

First check

Measure current activity of radioisotope

Test point: A₀
Expected: Current measured activity value

3 more checks with pass and fail actions, 3 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Detector well liner installation radiation

Proper placement and verification of detector well liner prior to radioisotope measurements to ensure accurate dose calibration.

Ranked causes

1. Missing or improperly installed detector well liner (common)

First check

Verify detector well liner is present

Test point: Detector well
Expected: Clear plastic liner installed

1 more check with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Detector well liner placement radiation

Proper placement and use of the detector well liner to protect the ionization detector from contamination during radioactive source measurement

Ranked causes

1. Detector contamination risk without liner (common)

First check

Verify well liner is installed in detector

Test point: Detector well opening
Expected: Plastic liner present and seated in well

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Detector well source positioning radiation

Radioactive sources must be positioned correctly within the detector well for accurate activity measurement. Sources can be in vials (using bottom cup of sample holder) or syringes (using syringe holder ring). Vertical orientation required.

Ranked causes

1. Improper source positioning affects measurement accuracy (common)

First check

Verify source holder type matches sample (vial cup or syringe ring)

Test point: Sample holder assembly
Expected: Vial in bottom cup or syringe in syringe holder ring

2 more checks with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Determine dial value for custom isotope radiation

User needs to establish a dial value (detector sensitivity factor) for an isotope not in Biodex's published table, using a sample with known activity.

Ranked causes

1. Custom isotope requires user-defined dial value (common)

First check

Obtain isotope sample with known activity value

Test point: Sample documentation
Expected: Activity value provided by isotope producer, pharmacy, or independent measurement method with accuracy estimate

8 more checks with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Determine dial values for radioisotopes radiation

Procedure to establish calibration dial values for radioisotope detection based on detector sensitivity curves relative to Co-60 reference standard.

Ranked causes

1. Dial values must be calculated from detector sensitivity to photon energy and radioisotope emission intensity (common)

First check

Verify detector sensitivity curve has been determined using NIST calibrated isotopes

Test point: Atomlab detector calibration
Expected: Sensitivity curve plotted against photon energy with measurements from Ga-67, Tc-99m, In-111, I-125, I-131, Tl-201, F-18, Co-57, Co-60, Ba-133, Cs-137

3 more checks with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Determine personal dial value for unmeasured isotope radiation

User needs to establish a dial value for an isotope without a published reference value by measuring a sample of known activity in the dose calibrator.

Ranked causes

1. No published dial value available for isotope (unknown)

First check

Obtain sample with known activity value

Test point: Source
Expected: Known activity documented from isotope producer, pharmacy, or independent measurement

5 more checks with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Dial value determination for radioisotope selection radiation

Procedure to calculate and set dial values for different radioisotopes in the dose calibrator detector, with Co-60 as reference

Ranked causes

1. Different radioisotopes require different detector sensitivity calibration values (common)

First check

Obtain detector sensitivity curve by plotting sensitivity versus photon energy

Test point: Detector sensitivity Se
Expected: Sensitivity curve in nA/mCi as function of photon energy
Tools: Reference tabulated photon sensitivity data and radioisotope emission spectra

3 more checks with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Dial Value Settings and Container Configuration radiation

Establish correct Dial Value for isotope measurement in sealed and unsealed source containers (syringes, vials)

Ranked causes

1. Container composition affects measurement accuracy for beta and low-energy gamma sources (common)

First check

Assay isotope quantity in plastic syringe with nominal 1mm wall thickness

Test point: Dose calibrator chamber
Expected: Activity reading recorded as Plastic Syringe Activity₁

4 more checks with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Geometry independence test radiation

Verify that indicated activity does not change with volume or configuration of source material using syringe and vial tests with Tc-99m

Ranked causes

1. Volume-dependent measurement errors in dose calibrator (common)

First check

Mix Tc-99m solution

Test point: Small vial
Expected: 2.0 ml solution with activity concentration between 1 and 10 mCi/ml
Tools: Syringe, vials

9 more checks with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Geometry test verification radiation

Repeat geometry test if significant volume correction results to verify measurements are within acceptable tolerance.

Ranked causes

1. Significant volume correction detected (occasional)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Isotope selection and response verification

Selecting isotope for measurement, verifying detector response time and activity display accuracy

Ranked causes

1. Isotope selection required before measurement (common)

First check

Select isotope and place source in detector

Test point: Detector well
Expected: Activity level displayed immediately

3 more checks with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Lineator Initial Test (setup phase) radiation

Initial capture of linearity reference factors using Tc-99m vial and multiple tubes prior to performing comparison tests.

Ranked causes

1. Baseline linearity factors required for future testing (unknown)

First check

Record reading for Tube 1 & 2

Test point: Lineator Tube 1 & 2 in detector
Expected: Live reading displayed and stable

3 more checks with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Passcode change

Change user access passcode in System Configuration

Ranked causes

1. User requires passcode update (common)

First check

Highlight Passcode field

Test point: Passcode field
Expected: Field highlighted and keypad displayed

3 more checks with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Source holder positioning radiation

Proper placement of radioactive sources in the detector well for accurate measurement within the 4-pi geometry

Ranked causes

1. Source positioning affects measurement accuracy (common)

First check

Measure source position from bottom of detector well without liner

Test point: Source location in detector well
Expected: 5 to 15 cm from bottom, 5 to 15 cm
Tools: Measuring tape or ruler

1 more check with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Source positioning for measurement radiation

Radioactive sources must be positioned correctly in the detector well to ensure accurate activity measurement. Sources are placed in sample holders (vials in bottom cup, syringes in holder ring) and oriented vertically 5 to 15 cm from detector well bottom.

Ranked causes

1. Improper source positioning affects measurement accuracy (common)

First check

Measure source position distance from detector well bottom

Test point: Detector well opening
Expected: 5 to 15 cm from bottom of detector well (measured without well liner), +/- 0.5%
Tools: Ruler or measuring tape

1 more check with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Tone Volume adjustment

Set the volume of the audible tone output from the Dose Calibrator

Ranked causes

1. Tone volume requires adjustment per user preference (common)

First check

Verify tone volume setting range

Test point: Tone Volume field
Expected: 0 – 10

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Work surface setup radiation

Establishing proper physical location and environmental conditions for dose calibrator operation to ensure accurate measurements and safe handling of radioactive sources.

Ranked causes

1. Inadequate work surface specifications (common)

First check

Verify work surface dimensions and capacity

Test point: Tabletop area
Expected: 30 in. deep, 48 in. wide, 36 in. high minimum; support 300 pounds

6 more checks with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Y-90 dial setting for vials radiation

Determining dial setting for Y-90 measurements using vial containers instead of plastic syringes

Ranked causes

1. Y-90 dial setting needs adjustment for vial geometry (occasional)

First check

Prepare vial with known Y-90 activity

Test point: vial source
Expected: vial contains documented Y-90 activity

1 more check with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Change selected isotope

Switch isotope selection during measurement; new isotope activity displays within one second

Ranked causes

1. User needs to measure different isotope (common)

First check

Select new isotope from list

Test point: Isotope selection menu
Expected: New isotope highlighted and selectable

1 more check with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Changing selected isotope during operation

Switching isotope selection after measurement started; new activity value displays within one second

Ranked causes

1. Need to change isotope for different measurement (common)

First check

Change isotope selection during operation

Test point: Isotope selection interface
Expected: New isotope activity value displayed within one second of selection

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Configuration: Display units

Select between Curies or Becquerels unit display

Ranked causes

1. User preference for unit display (common)

First check

Touch unit selection radio box

Test point: Units selection
Expected: Curies or Becquerels selected

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Configuration: Screen brightness

Adjust display brightness from 0 to 10

Ranked causes

1. User preference for screen brightness (common)

First check

Select brightness level

Test point: Brightness control
Expected: Value from 0 to 10

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Configuration: Screen saver timeout

Set time in minutes before screen saver activates

Ranked causes

1. User preference for screen saver (common)

First check

Enter screen saver timeout value

Test point: Screen Saver field
Expected: Time in minutes entered

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Configuration: Tone volume

Adjust audio tone volume from 0 to 10

Ranked causes

1. User preference for tone volume (common)

First check

Select tone volume level

Test point: Tone Volume control
Expected: Value from 0 to 10

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Detector bias voltage anomaly patient safety

Error code 8 displayed; detector offline, bias voltage out of specification

Ranked causes

1. Bias voltage outside 325V–375V range (rare)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Detector error status displayed

Error code and description shown on detector status screen with WARNING or FAIL indicator

Ranked causes

1. Detector fault condition detected (unknown)

First check

Verify detector power and communication status

Test point: Display screen and detector connection
Expected: Error code with brief description displayed; WARNING if usable, FAIL if dropped

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Detector error status reported during operation

Display shows popup screen with error code and audio tone alert when detector reports error condition; code marked as WARNING (detector usable) or FAIL (detector dropped from selection)

Ranked causes

1. Detector communication error or severe fault state (unknown)

First check

Verify detector power and connection status

Test point: Detector connection to display unit
Expected: Detector powered and connected, no communication error

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Detector gas leak or gas low warning caution

Gas leak or gas low warning appears on detector status screen with 24-hour reminder implemented

Ranked causes

1. Detector gas leak or gas pressure below threshold (unknown)

First check

Monitor 24-hour reminder reminder schedule

Test point: Display screen timestamp
Expected: Reminder displays at 8:00 am if warning is in effect and 4+ hours elapsed since first detection

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Detector gas low, correctable patient safety

Warning code 5 displayed; detector remains usable but no linearity correction applied

Ranked causes

1. Argon gas loss exceeds 5% of factory value (occasional)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Detector gas too low to use patient safety

Error code 6 displayed; detector automatically taken offline, no measurements possible

Ranked causes

1. Argon gas loss exceeds 10% of factory value (occasional)

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

More symptoms

Detector gas warning triggered
Detector leaking gas or gas low warning
Detector status error during operation
Detector well liner installation and maintenance
EEPROM data corrupt
Electrometer monitor voltage anomaly
Electrometer needs recalibration
Firmware checksum error
Fluctuations in activity measurements
Improve measurement accuracy for low-activity sources
Initial Lineator factors replacement needed
Lead shield backscatter affects sensitivity at 88–200 keV photon energy
Maintenance: Dial value checks
Maintenance: Dipper and well liner inspection
Measurement range verification for Tc-99m
Mo-99 display fluctuations
No available detector error
No available detector selected
Overrange detector reading
Power supply configuration and site preparation
Request QA test record count
Restore factory dial values for all isotopes
Test completion and documentation
Unexpected activity reading
Unexpected activity readings
Y-90 dial setting for vial measurements

26 more symptoms with ranked causes and checks are in ServiceForge. Connect ServiceForge to your AI

Error codes

Code	Meaning	Trigger	Severity
`Between 0 and -5% (single source)`	Measurement within acceptable negative tolerance	One reference source reads 0 to -5% error	info
`Between 0 and +5% (single source)`	Measurement within acceptable positive tolerance	One reference source reads 0 to +5% error	info
`Both high within tolerance`	Both sources measure high but within acceptable limits	Both sources exceed true activity within tolerance band	info
`Both high with tolerance`	Both sources read high but within specified tolerance	Both sources measure above true activity but within acceptable range	warning
`Both skewed high`	Both reference sources measure significantly above true activity	Both sources read high (positive error)	error
`Both skewed low`	Both reference sources measure significantly below true activity	Both sources read low (negative error)	error
`Both sources between ±5%`	Both reference sources measure within ±5% error	Average percent errors for both sources within ±5%	info
`Communication error`	Loss of communication between detector and display unit	Detector not communicating or in severe fault state	critical
`Detector Gas low`	Detector gas supply level depleted or below operating threshold	Gas level monitored by detector self-test	warning
`Detector leaking Gas`	Detector gas container has a leak	Gas leak detected by detector self-test	warning
`Large difference, skewed high`	Both sources measure high with large discrepancy between them	Both sources read high but with significant variation between readings	error
`Large difference, skewed low (one source > 5%, < 10%)`	One source measures significantly low, other differs markedly	One source error exceeds 5% to 10%, other differs substantially	warning
`Large transition during initialization`	Unusually large change in activity detected during background initialization or Zero Background procedure	Large activity change (nn.n pa) detected when initializing background or performing Zero Background	warning
`Measure Screen Not Active`	The Measure screen must be on view for this command to work	Command issued when Measure screen is not displayed	error
`No Available Chamber`	The dose calibrator detector cannot be found or is not available	Detector connection lost or not detected	error
`Power Supply Configuration`	AtomLab 500 uses ICC Nexergy model ME60A1503-F02 modified power supply	System power requirements specification	info

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ServiceForge knowledge base record. Field-unverified unless technicians confirmed it. A teaching summary of the record, not a service manual. Export 2026-10-14.