Test equipment medical gas analyzers

Waters Medical Systems Oxicom 2100: troubleshooting and error codes

The ServiceForge knowledge base holds 32 documented symptoms for the Waters Medical Systems Oxicom 2100, with 44 ranked causes, 46 diagnostic checks with test points and expected values, and 20 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Display shows error code ER1-ER5 patient safety

Error codes ER1 through ER5 indicate measuring separated blood sample with streaks or improper sample handling

Ranked causes

1. Blood sample separated or diluted by heparin/saline (common)
2. Blood sample more than 10 minutes old (common)
3. Cuvette laid on edge during handling (occasional)

First check

Inspect blood sample for separation or streaks

Test point: Cuvette contents
Expected: Uniform color, no streaks or separated areas

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

Erroneous readings due to cuvette contamination patient safety

Inaccurate measurements caused by contamination of cuvette sampling area or improper handling

Ranked causes

1. Cuvette sampling area contaminated or touched (common)
2. Foreign material on cuvette external surface (occasional)
3. Air bubbles or micro bubbles in blood sample (occasional)

First check

Inspect cuvette before use

Test point: Cuvette sampling area and exterior
Expected: Clean, no contamination, no powder, no visible damage

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

Display shows error code ER7 or ER8 patient safety

Error codes ER7 or ER8 indicate blood in sample chamber or poor calibration from bad blood sample

Ranked causes

1. Blood in sample chamber (occasional)
2. Poor calibration from bad blood sample (occasional)

First check

Verify blood samples meet calibration parameters

Test point: Sample composition and saturation
Expected: Arterial 90-99.9%, venous 60-72%, THb 10-14 gm/dl, COHb <3%

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

Erroneous readings due to blood sample separation or contamination patient safety

Inaccurate measurements from separated blood, heparin/saline dilution, or dye contamination

Ranked causes

1. Blood diluted by heparin or saline (common)
2. Presence of dyes affecting measurement (rare)

First check

Verify blood sample is not separated

Test point: Cuvette contents visual inspection
Expected: Uniform color, no separated or stratified areas

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

Erroneous readings due to cuvette reuse or filter reuse patient safety

Inaccurate measurements when cuvettes or white filters are reused

Ranked causes

1. Cuvette reused causing optical path obstruction (occasional)
2. White filter reused allowing oxygen contamination (occasional)

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

Erroneous readings due to dirty QC filters caution

Inaccurate QC readings when Quality Control filters are contaminated or not cleaned properly

Ranked causes

1. Dirty QC filters (common)
2. QC filters inserted in wrong sequence (occasional)

First check

Inspect QC filters for cleanliness

Test point: QC filter surfaces
Expected: Clean, dry, no dust or contamination

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

Erroneous readings due to improper sample insertion timing

Incorrect measurements when cuvette inserted before INS prompt or removed before reading complete

Ranked causes

1. Sample inserted before INS display prompt (common)
2. Sample removed before reading is completed (occasional)

First check

Monitor display for INS prompt

Test point: Display screen
Expected: "INS" displayed

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

Erroneous readings due to liquid control sample issues caution

Inaccurate control readings when liquid QC samples are improperly mixed or contaminated

Ranked causes

1. Liquid control sample improperly mixed (occasional)
2. Blood or foreign substances in sample chamber affecting controls (occasional)

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

Quality control reading outside tolerance

QC filter reading differs from expected value by more than ±3% during internal QC or ±7% during external QC; 'CLN' or 'RMV' displayed when chamber contaminated

Ranked causes

1. Sample chamber contaminated (common)
2. Oxicom 2100 requires recalibration (occasional)

First check

Verify sample chamber is clean before QC run

Test point: Sample chamber
Expected: No visible contamination

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

Sample not accepted or display shows RMV

Sample was inserted before 'INS' appeared on display, or sample inserted incorrectly; 'RMV' message displayed

Ranked causes

1. Sample inserted before INS prompt (common)
2. Sample inserted with cuvette orientation incorrect (occasional)

First check

Verify INS prompt is displayed before sample insertion

Test point: Display screen
Expected: INS message visible

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

Calibration: Oxicom 2100 accuracy verification patient safety

Quarterly check to verify measurement accuracy within 3% of co-oximeter reference using venous blood sample in 60-72% saturation range

Ranked causes

1. Accuracy drift beyond 3% tolerance (common)

First check

Compare Oxicom 2100 reading to co-oximeter functional saturation

Test point: Sample chamber
Expected: Within 3% of co-oximeter value

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

Calibration: Oxicom 2100 oxygen saturation patient safety

Procedure to calibrate the Oxicom 2100 medical gas analyzer using arterial and venous blood samples with Co-Oximeter reference values

Ranked causes

1. Calibration required for rated accuracy (common)

First check

Warm-up time before calibration

Test point: Oxicom 2100 power on
Expected: Unit on for minimum 15 minutes; if not, wait for Display to read CAL

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

Calibration: Oxicom 2100 weekly quality control patient safety

Record weekly QC readings for QCHigh, QCMid, QCLow samples and verify they fall within ±7% of baseline range; inspect and clean sample chamber

Ranked causes

1. Out-of-range QC readings indicate analyzer drift or malfunction (occasional)

First check

Establish baseline QC ranges for High, Mid, Low samples

Test point: QCHigh, QCMid, QCLow
Expected: Range ±7% Sat

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

Display shows asterisk (*) in left segment patient safety

Asterisk displayed indicating measured oxygen saturation exceeds 99.9%

Ranked causes

1. Measured saturation exceeds 99.9% saturation range (occasional)

First check

Verify blood sample parameters

Test point: Sample composition
Expected: Arterial 90-99.9%, THb 10-14 gm/dl, COHb <3%

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

Display shows error code CLN

Error code CLN displayed indicating blood or foreign material present in sample chamber

Ranked causes

1. Blood or foreign material in the sample chamber (common)

First check

Inspect sample chamber for blood or contamination

Test point: Sample chamber interior surfaces
Expected: Clean, no visible blood or foreign material

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

Display shows error code ER6 patient safety

Error code ER6 indicates streaks visible in blood sample

Ranked causes

1. Streaks or abnormalities in blood sample (occasional)

First check

Visually inspect blood sample in cuvette

Test point: Cuvette sampling area
Expected: Uniform color with no streaks or abnormalities

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

Display shows error code ER9 caution

Error code ER9 indicates optical density ratio (ODR/ODIR) outside range of 0.5 to 2.0

Ranked causes

1. Optical density ratio out of tolerance (rare)

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

Display shows error code ERa caution

Error code ERa indicates Red LED out of tolerance or not operating

Ranked causes

1. Red LED out of tolerance or not operating (rare)

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

Display shows error code ERb caution

Error code ERb indicates IR LED out of tolerance or not operating

Ranked causes

1. IR LED out of tolerance or not operating (rare)

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

Display shows error code ERc patient safety

Error code ERc indicates high and low sample values were entered in reversed order during calibration

Ranked causes

1. High and low sample target values reversed during calibration (occasional)

First check

Verify correct sample target values during calibration entry

Test point: Calibration display prompts
Expected: High sample 90-99.9%, low sample 60-72%

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

Display shows error code ERd patient safety

Error code ERd indicates calibration factors derived are out of range

Ranked causes

1. Bad blood samples or incorrect target values entered (occasional)

First check

Verify blood sample parameters before calibration

Test point: Sample composition and saturation
Expected: Arterial 90-99.9%, venous 60-72%, THb 10-14 gm/dl, COHb <3%

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

Display shows error code ERe caution

Error code ERe indicates optical density measured by Oxicom 2100 is out of tolerance

Ranked causes

1. Dirty QC filters, contaminated sample chamber, or calibration drift (common)

First check

Verify QC filters are clean and dry

Test point: QC filter surfaces
Expected: No dust, blood, or contamination; filters dry

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

Display shows error code RMV

Error code RMV displayed when sample is inserted before INS prompt appears

Ranked causes

1. Sample inserted before INS display prompt (common)

First check

Monitor display for INS prompt

Test point: Display screen
Expected: "INS" displayed

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

Erroneous readings due to display malfunction caution

Incorrect readings when display is malfunctioning or system check fails

Ranked causes

1. Display malfunction or failed system check (rare)

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

Erroneous readings due to improper cuvette orientation

Inconsistent or inaccurate readings when cuvette not positioned correctly in chamber

Ranked causes

1. Cuvette not inserted with bottom panel down (occasional)

First check

Verify cuvette orientation before insertion

Test point: Cuvette position in hand
Expected: Bottom panel facing downward toward chamber

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

Erroneous readings due to incomplete warm-up

Inaccurate measurements taken before rated accuracy is achieved during warm-up period

Ranked causes

1. Unit not fully warmed up before measurement (common)

First check

Verify warm-up completion

Test point: Display status
Expected: "RDY" or "CAL" displayed

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

Error displayed during blood sample insertion

Error code appears when arterial or venous blood sample is inserted into sample chamber during calibration

Ranked causes

1. Blood or foreign material contamination in sample chamber (common)

First check

Inspect sample chamber for visible contamination

Test point: Sample chamber interior
Expected: No blood residue, particles, or foreign material visible

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

Factory reset calibration procedure patient safety

Procedure to reset Oxicom 2100 to factory default settings as starting point for recalibration

Ranked causes

1. Need to reset to factory defaults before recalibration (common)

First check

Verify FCT mode is entered

Test point: Display screen
Expected: "FCT" displayed after holding arrow buttons and powering on

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

QC1 data not stored in memory

QC1 filter decimal points do not alternate or data storage does not complete during QC filter measurement phase

Ranked causes

1. Insufficient time for data storage completion (occasional)

First check

Monitor decimal point alternation during QC1 measurement

Test point: Display decimal points
Expected: Decimal points alternate while measuring; stop alternating when measurement complete min, 1 to 2 minutes

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

Quality Control readings out of range

QC filter readings differ from expected calibration values or display shows 'ERe' indicating optical density variation or sample chamber contamination

Ranked causes

1. Sample chamber contaminated (common)

First check

Insert QC1 filter and record reading

Test point: Sample chamber
Expected: Reading within ±3% of calibration value (e.g., 82-88% if QC1 nominal is 85%)

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

Sample chamber contamination with blood caution

Blood or foreign material accidentally infused into sample chamber causes incorrect readings and error code CLN

Ranked causes

1. Blood or foreign material in sample chamber (occasional)

First check

Verify sample chamber is clean before reassembly

Test point: Detector and fiber optic cable tip surfaces
Expected: No visible blood or foreign material

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

Sample measurement within time window

Ensuring blood samples are measured promptly to prevent cell separation and maintain sample integrity

Ranked causes

1. Delayed sample measurement causing cell separation (common)

First check

Measure blood sample

Test point: Sample timing
Expected: Sample measured within 10 minutes of withdrawal

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

Error codes

Code	Meaning	Trigger	Severity
`*`	Saturation exceeds 99.9%	Measured oxygen saturation value exceeds 99.9% range	info
`CLN`	Blood or foreign material in sample chamber	Detector senses contamination in sample chamber	warning
`ER1`	Blood sample separated or degraded	Measuring blood sample that has separated	error
`ER2`	Blood sample separated or degraded	Measuring degraded blood sample	error
`ER3`	Blood sample separated or degraded	Measuring degraded blood sample	error
`ER4`	Blood sample separated or degraded	Measuring degraded blood sample	error
`ER5`	Blood sample separated or degraded	Measuring degraded blood sample	error
`ER6`	Streaks visible in blood sample	Measuring blood sample with visible streaks	error
`ER7`	Blood in chamber or bad calibration sample	Blood detected in sample chamber or calibration on degraded sample	error
`ER8`	Blood in chamber or bad calibration sample	Blood detected in sample chamber or calibration on degraded sample	error
`ER9`	Optical density ratio out of tolerance	Ratio of optical densities (ODR/ODIR) outside 0.5 to 2.0 range	error
`ERa`	Red LED out of tolerance or not operating	Red LED fails function or output test	error
`ERb`	IR LED out of tolerance or not operating	IR LED fails function or output test	error
`ERc`	High and low sample values entered in reversed order	During calibration, high sample entered as low value and vice versa	error
`ERd`	Calibration factors out of range	Derived factors during calibration exceed acceptable limits	error
`ERe`	Optical density out of tolerance	Measured optical density exceeds acceptable range	error
`ERe`	Error in QC reading; optical densities differ or sample chamber contaminated	QC filter reading differs from expected value or optical density variation detected	error
`INS`	Insert QC filter; device ready for filter insertion	Displayed after power-on warm-up completion or after START button pressed	info
`RMV`	Sample inserted at wrong time	Cuvette inserted before INS display prompt appears	warning
`RMV`	Remove QC filter; filter inserted before INS prompt appeared	QC filter inserted before "INS" displayed on screen	warning

Likely causes and actions for each code are in ServiceForge. Connect ServiceForge to your AI

Community

0 fixes logged by technicians through their AI, with outcomes, for this model.

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