Hitachi 902 User manual

SERVICE MANUAL
FOR
MODEL 902 AUTOMATIC
ANALYZER
Copyright Hitachi, Ltd. 1997. All rights reserved. Printed in Japan. Part No. 713-9039 KN-K (H-LT)

- i -
MODEL 902 AUTOMATIC ANALYZER
CONTENTS
1. PRODUCT SPECIFICATIONS................................................................................. 1-1
2. TROUBLESHOOTING ............................................................................................. 2-1
3. FLOW PATH DIAGRAMS ........................................................................................ 3-1
4. BLOCK DIAGRAMS................................................................................................. 4-1
5. ISE ........................................................................................................................... 5-1
6. SWITCH SETTING................................................................................................... 6-1
7. EXPLANATION OF FUNCTION............................................................................... 7-1
8. MOTORS, DETECTORS AND FUSES .................................................................... 8-1
9. ANALYTICAL METHODS......................................................................................... 9-1
10. CIRCUIT DIAGRAMS............................................................................................... 10-1
11. CROSS WIRING REFERENCE ............................................................................... 11-1
12. INSTALLATION........................................................................................................ 12-1
13. MAINTENANCE AND INSPECTION ........................................................................ 13-1
14. ADJUSTMENT SPECIFICATIONS........................................................................... 14-1
15. OEM......................................................................................................................... 15-1
16. SYSTEM INTERFACE.............................................................................................. 16-1

1 - 0
1.PRODUCT SPECIFICATIONS
1.1 Overall System.........................................................................................................1-1
1.2 Sampling System.....................................................................................................1-2
1.3 Reagent System.......................................................................................................1-3
1.4 Reaction System......................................................................................................1-4
1.5 Photometic System..................................................................................................1-5
1.6 ISE (option)..............................................................................................................1-5
1.7 Installation Conditions..............................................................................................1-6
1.8 User Interface...........................................................................................................1-6
1.9 Dionized Water........................................................................................................1-6
1.10 Analytical Methods...................................................................................................1-7
1.11 Accuracy Methods....................................................................................................1-7
1.12 Data Storage............................................................................................................1-7
1.13 System Interface......................................................................................................1-8
1.14Options for Analyzer.................................................................................................1-8

1 - 1
1.PRODUCT SPECIFICATIONS
1.1 Overall System
Configuration :Console type automatic analyzer, with analytical and operation units
integrated
Principle :Discrete type, random access, single-line multi-analysis system;
entire reaction monitoring system
Analytical methods :Colorimetry (absorbance measurement), ion selective electrode
method (ISE; option)
Throughput :Colorimetry ;200 tests/hr (Photometry only max. 300 tests/hr
inclusive of ISE)
No. of analysis items:Colorimetry ;36
ISE ;3 (Na, K, Cl)
Serum indexes ;3
Calculation items;8
Reaction time :10 minutes max.; 3, 4, 5, 10 minutes for concentration calculation
(same as Model 7070/7170)
Measurable samples :Serum (or blood plasma) and urine; one sample kind per channel
Application :Emergency (stat) and routine analyses
Test item selection :Via entry from operation panel, entry from system interface, entry
from no. of items settable (11 kinds)

1 - 2
1.2 Sampling System
Sample container :Hitachi standard sample cup
Sample tube ;diameter 13 to 17 mm
length 75 to 100 mm
Sample disk :60 positions
Outer row;35 positions (routine and stat samples)
(with free adapter, barcode reader attachable)
Inner row;25 positions (standard + control samples (22),
rinse solutions (3))
Detergents :3 kinds
(W1;for sample probe rinsing) HITERGENT
(W2;for sample carryover evasion) ISE RINSE SOLUTION
(W3;for sample carryover evasion) HICARRYNON
Sampling mechanism :Pipetter driven by stepping motor
2 to 50 µL of sample/test (in 0.1 µL steps)
Pipetting mode :Normal ;prescribed volume discharged at cell
bottom
Aqueous sample;system water solution for sample probe
internal rinsing usable as STD-1
Sample pre-dilution not performed
Insufficient sample detection:Resistance detection method
Sample ID :Barcode reader (option)
Following code shemes are usable in combination; CODE 39,
CODE 128, INTERLEAVED 2 OF 5, NW7 (Modulas 10,
Modulas 16)
Automatic rerun :Auto rerun function not provided
Stat sample analysis :Routine sample analysis interruptible for stat sample analysis
Sample carryover :Sample carryover evasion function available; 2 kinds of
detergents settable on sample disk inner row
Sample conveyance :Can be sampled directly from belt-line

1 - 3
1.3 Reagent System
Reagent disk :One disk, 40 positions
(20 positions each on inner and outer rows)
Reagent cooling :Cooling water circulating system (3 to 15°C) (option for China-
destined instrument)
Reagent bottle :50 mL, 20 mL (adapter necessary)
(without barcode, concentrated reagent unusable)
Detergents :HITERGENT (50 mL); position 40 (fixed)
(for addition to reaction bath)
Detergent 1;for reagent probe, stirring rod rinsing, reagent
probe carryover evasion, reaction cell carryover
evasion
Detergent 2;for reagent probe carryover evasion, reaction cell
carryover evasion
(settable on reagent disk inner row)
ISE reagent :Internal standard solution(position 37 (fixed))
Diluent (position 38 (fixed))
Pipetting mechanism :Pipetter driven by stepping motor; 20 to 350 µL/test (in 1 µL
steps)
Reagent addition timing:3 steps (0, 1.5 and 5 minutes); throughput is maintained even
when adding 3 reagents.
Carryover evasion :Rinsing for carryover evasion possible; throughput may decrease
by specifying carryover evasion.

1 -4
1.4 Reaction System
Reaction disk :Turntable type disk (10-minute reaction per rotation)
Reaction cell :Optical path length 6 mm (area 6 ×5 mm)
No. of reaction cells :48
Reaction cell control :One rotation + one pitch feed (18 seconds)
Sample pipetting position:One position (fixed)
Reagent pipetting position:One position (fixed)
Reaction temperature :37 ±0.1°C (warm water circulating system)
Stirring :By means of stirring rod rotation
Timing for stirring; after each addition of R1,R2,R3
Stirring possible for a minimum volume of 100 µL
Stirring position :One position (fixed)
Reacting solution volume:Minimum;250 µL (minimum required volume for photometry)
Maximum;500 µL (temperature control, rinsing upper limit)
Photometric position :One position (fixed)
Cell rinsing :After completion of photometry (rinsing 3 times; rinsing with
detergent not performed)
Carryover evasion :Rinsing for carryover evasion possible; throughput may decrease
by specifying cell carryover evasion

1 - 5
1.5 Photometric System
Photometer :Multiwavelength photometer (absorptiometry)
Wavelengths :12 wavelengths
(340, 376, 415, 450, 480, 505, 546, 570, 600, 660, 700, 800 nm)
Monochromator :Grating
Detector :Photodiode
Linearity :Up to 2.5 Abs (10 mm cell conversion)
Photometric method:Direct photometry of reaction cell (at one or two wavelengths)
Correction :Cell blank correction prior to analysis
(passed cell blank measurement alone)
1.6 ISE (option)
Electrodes :Flow cell type, liquid-membrane ISE cartridge
Reference electrode flow path:1 MKCL, liquid flow path
Measuring temperature :36°C ±2°C (warm water circulating system)
System :Indirect (dilution) potentiometry, 50-times dilution
Measuring cycle :36 sec/sample (18 sec for sample, 18 sec for internal
standard solution)
Measured items :Na, K, Cl
Measurable samples :Serum and urine
Linearity :Na;10 to 250 mmol/L
K;1 to 100 mmol/L
Cl;10 to 250 mmol/L
Reagent bottle :Internal standard solution ;50 mL max.
Diluent ;50 mL max.
Reference electrode solution;500 mL max.

1 - 6
1.7 Installation Conditions
Power requirement :230 V, 50/60 Hz, less than 1.5 kVA
Deionized water consumption:Less than 15 L/hr
Waste liquid drain :2 systems (for concentrated and diluted liquids)
Ambient temperature/humidity: Temperature;18 to 30°C
Humidity ;20 to 80% (non-condensing)
Analyzer dimensions :720 W ×720 D ×1085 H mm
Analyzer weight :Within 200 kg
BTU :1300 kcal/hr max.
Noise (mean) in operation :< 55 dB
1.8 User Interface
Application :Routine analysis for Asia version
Display :Backlighted LCD; 256 ×128 dots, graphic
Keyboard :Touch screen keys (72 keys)
Printer :Thermal roll-paper printer (20 digits)
Multi-language
compatibility :Display;Japanese/English/Chinese/German/Spanish applicable
Printer;English alone
1.9 Deionised Water
Pressure :0.5 to 3.5 kgf/cm2
Conductivity:1 µs/cm or less, germ-free

1 - 7
1.10Analytical Methods
Assay modes :One-point
One-point end (+ prozone check)
Two-point rate
Two-point end (+ prozone check)
Three-point two-item
One-point rate two-item
Rate A (+ sample blank correction)
Rate A (+ serum indexes)
Rate B two-item (same wavelength)
Rate B two-item (different wavelengths)
ISE
Data alarms :Based on Model 7070/7170
Standard solution :22 kinds max. (positions to be shared with control sera)
Calibration types :Linear (2-point linear)
K factor
4 parameter LOGIT-LOG
5 parameter LOGIT-LOG
Spline
Segmented line
Calibration method :At startup only; all points (FULL) and reagent-blank-corrected
calibration
Calculation channels :For 8 channels
Test-to-test compensation :For 8 channels
1.11Accuracy Control
Control serum :5 kinds max. (positions shared with standard solutions)
1.12Data Storage
Routine sample data :400 samples (in data disk)
Stat sample data :50 samples (in data disk)
Control sample data :5 kinds ×30 (in SRAM)

1 - 8
1.13System Interface
Interface :RS-232C and current loop
Communication protocol:Based on Model 7070/7170
Communication details :Communication with host; communication details based on Model
7070/7170
1.14Options for Analyzer
ISE
Sample ID accessory :Model ;BL180
Maker ;Keyence
Barcode spec.;CODE 39, ITF, NW7 (Modulas 10, Modulas 16),
CODE 128

2 - 0
2. TROUBLESHOOTING
2.1 Alarm Code Table....................................................................................................2-1
2.1.1 LCD Display Alarm .....................................................................................2-24
2.2 Motor Control Alarms................................................................................................2-26
2.2.1 Operation Check Procedure at Occurrence of Alarm .................................2-27
2.3 Parameter Check .....................................................................................................2-29
2.3.1 Processing Flow .........................................................................................2-29
2.3.2 Details of Parameter Check........................................................................2-30
2.3.3 Details of Twin Test Simultaneous Analysis ...............................................2-34
2.4 Data Alarm...............................................................................................................2-35
2.4.1 Data Alarm Registratin Flow.......................................................................2-35
2.4.2 Data Alarm Code List..................................................................................2-36
2.4.3 Data Alarm Codes ......................................................................................2-37
2.4.4 ISE Data Alarms.........................................................................................2-49
2.4.5 Alarm Check Method..................................................................................2-52
2.4.6 Check and Set Alarm of Each Data............................................................2-60
2.4.7 Details of Data and Alarm Outputs Resulting from Calibration...................2-61
2.4.8 Output Check List for Each Photometry Assay CALIB. METHOD .............2-62
2.5 Retry Code Table.....................................................................................................2-64
2.5.1 Logging Program List......................................................................................2-65
2.6 Daily Alarm Trace.....................................................................................................2-67
2.6.1 Cumulative Alarm Trace.............................................................................2-69
2.6.2 Parameter Code List...................................................................................2-72
2.6.3 Communication Trace.................................................................................2-74
2.6.4 Cumulative Instrument Operation List.........................................................2-78
2.6.5 FD File Management..................................................................................2-79

2 - 1
2. TROUBLESHOOTING
2.1 Alarm Code Table
Category Alarm Name Category Alarm Name
1STIRRER 38 VAC. TANK
2 39
3RINSE 40
4 41 LAMP
5R.DISK 42
6S.PROBE 43
7 44
8S.DISK 45 CELL BNK1
9 46 CELL BNK2
10 47 ADC1 ?
11 S. SHORT 48 ADC2 ?
12 49 ADC3 ?
13 50 BARCODE 1
14 51
15 S. SYRINGE 52
16 REAG. PROBE 53
17 54 BARCODE 2
18 REAG. DISK 55
19 56
20 57 REAG. SHORT
21 58
22 R. SYRINGE 59 REAG. LEVEL
23 60
24 ISE SIPPER 61
25 62
26 ISE SYRING. 63
27 ISE STOP ? 64
28 TEMP CONT. 65
29 INC. WATER 66
30 REF. WATER 67 TS OVER
31 DIST. WATER 68 PATNT OVER
32 DIST. SENS. 69 SAMP. END
33 70
34 RESERVOIR 71 DC POWER
35 72 FUSE
36 73 POWER FAIL
37 SIPPER 74
(cont’d)

2 - 2
Category Alarm Name Category Alarm Name
75 MOTOR CONT. 114 ACI ERROR
76 MOTOR TOUT 115
77 116
78 117
79 118
80 119 FD WRITE ?
81 120 FD READ ?
82 121 NO FD
83 STANDARD ? 122
84 CALIB. 123 FD PROTECT
85 CALIB. SD ? 124
86 SENS. ? 125 PRINTER
87 126 SYSTEM I/F
88 127
89 128
90 ISE LEVEL 129
91 ISE NOISE 130 WATER EXG.
92 ISE PREP. 131
93 ISE SLOPE 132
94 ISE I. STD 133
95 REF. SHORT 134
96 TWIN TEST ? 135
97 136
98 CHEM. PARAM ? 137
99 CLB. PARAM ? 138
100 VOLUME ? 139
101 140 PANEL I/F
102 141 REAGNT ?
103 CMP. TEST ? 142
104 S. INDEXES ? 143
105 144
106 ON BOARD ? 145 CELL C. O.
107 REAG. POS ? 146 ISE C. O.
108 CLB (IS) POS 147
109 148
110 149
111 150
112 151
113 152

2 - 3
Alarm
Control
No. Alarm Category Sub-
code Level Description Remedy
1 to 8 STIRRER 1 1 STOP In ascending action of the
stirrer, it does not reach the
upper dead point (on the
rinsing bath side).
(Alarm at the first upper
dead point after resetting will
be issued from other than
the cell side.)
Check the upper dead
point detector.
1 2 STOP In ascending action of the
stirrer, it does not reach the
upper dead point (on the cell
side).
Same as above
1 3 STOP In descending action of the
stirrer, it does not leave the
upper dead point.
Same as above
1 4 STOP When the stirrer moves
toward the rinsing bath, it
does not reach the rinsing
bath position.
Check the home
detector.
1 5 STOP The stirrer does not come to
the cell position. Check the detector on the cell side.
1 6 STOP At resetting, the stirrer does
not reach the rinsing bath
position (home position) in
its return movement to the
home position.
Check the home
detector.
1 7 STOP At resetting, the stirrer does
not leave the rinsing bath
position (home position) in
its departing movement
from the home position.
Same as above
1 8 STOP In rotation of the stirrer, it is
not set at the upper dead
point.
Check the upper dead
point detector.
21,22 RINSE 3 1 STOP The rinsing mechanism does
not reach the upper dead
point in ascending motion.
Check the upper dead
point detector.
3 2 STOP The rinsing mechanism does
not leave the upper dead
point in descending motion.
Same as above

2 - 4
(cont’d)
Alarm
Control
No. Alarm Category Sub-
code Level Description Remedy
61 to 65 R. DISK 5 1 STOP The reaction disk cannot
recognize its stop position. Check the detectors for stop positions on the
inner and outer tracks.
5 2 STOP The reaction disk does not
stop at the specified
position.
Same as above
5 3 STOP At resetting, the reaction
disk cannot recognize its
home position.
Check the home
detector.
5 4 STOP At resetting, the first cell
on reaction disk does not
stop at the specified
position.
Check the home
detector or inner/outer
track detector.
5 5 STOP When the reaction disk
turns, the serum probe,
reagent probe, stirrer or
rinsing mechanism is not
set at the upper dead point
(on the cell side).
(When this alarm is
issued, another alarm (on
rinsing or stirring
mechanism) may concur.)
(1) Perform resetting.
(2) Check the upper
dead point detector
of the mechanism
which caused
alarm.
71 SAMPLE
PROBE 6 1 S.STOP/ STOP
(Note 1)
The serum probe does not
reach the upper dead point
in ascending motion (on
other than the cell side).
(Alarm at the first upper
dead point after resetting
will be issued from other
than the cell side.)
Check the upper dead
point detector.
72 to 85 SAMPLE
PROBE 6 2 STOP The serum probe does not reach the upper dead point
in ascending motion (on
the cell side).
Same as above
6 3 S.STOP/
STOP
(Note 1)
The serum probe moves
down abnormally in
descending action (on
other than the cell side).
(±3 mm from cup bottom,
0 to 4 mm from cell
bottom)
(1) Check the liquid
level detector.
(2) Replace the liquid
level detector PC
board.
6 4 STOP The serum probe moves
down abnormally in
descending action (on the
cell side).
Same as above
6 5 S.STOP/
STOP
(Note 1)
The serum probe does not
go down from the upper
dead point in descending
motion.
Check the upper dead
point detector.
NOTE: 1. S.STOP may be issued only during operation.

2 - 5
(cont’d)
Alarm
Control
No. Alarm Category Sub-
code Level Description Remedy
72 to 85 SAMPLE
PROBE 6 6 STOP The serum probe does not go down from the upper
dead point in descending
motion (on the cell side).
Check the upper dead
point detector.
6 7 S.STOP/
STOP
(Note 1)
Detection of abnormal
descending motion of the
serum probe remains on.
Refer to alarm code
6-3.
6 8 S.STOP/
STOP
(Note 1)
When serum probe turns to
the cell side, the cell position
cannot be detected.
Check the home
detector.
6 9 S.STOP/
STOP
(Note 2)
When the serum probe turns
from the cell side to other
position, it does not come off
the cell position.
Same as above
6 11 S.STOP/
STOP
(Note 1)
Before the probe goes down,
the liquid level detector is
already turned on.
Refer to alarm code
6-3.
6 12 WARNIN
GThe serum probe moves down abnormally in
descending action (only at
turning of the serum probe in
adjustment).
Same as above
6 13 S.STOP/
STOP
(Note 2)
In rotation of the serum
probe, it is not set at the
upper dead point.
Check the upper dead
point detector.
6 14 STOP In rotation of the serum
probe from the reset
position, it does not come off
the reset position.
Check the home
detector.
6 15 STOP In rotation of the serum
probe to the reset position, it
cannot detect the reset
position.
Same as above
101 to
106 SAMPLE DISK 8 1 S.STOP/ STOP
(Note 2)
The sample disk cannot
detect the stop position on
outer track.
Check the outer track
detector.
8 2 S.STOP/
STOP
(Note 2)
The sample disk does not
stop at the specified position
on outer track.
Same as above
8 3 S.STOP/
STOP
(Note 2)
The sample disk cannot
detect the stop position on
inner track.
Check the inner track
detector.
8 4 S.STOP/
STOP
(Note 2)
The sample disk does not
stop at the specified position
on inner track.
Same as above
NOTE: 2. S.STOP may be issued only during operation.

2 - 6
(cont’d)
Alarm
Control
No. Alarm Category Sub-
code Level Description Remedy
101 to
106 SAMPLE DISK 85STOP At resetting, the sample disk cannot detect the home
position.
Check the home
detector.
86STOP At resetting, the sample disk
does not stop at the specified
point of home position.
Same as above
107 SAMPLE
DISK 87STOP At resetting, the sample disk does not leave the home
position.
Check the home
detector.
251 to
310 SAMPLE SHORT 11 1 to 60WARNING In sipping from the sample cup, sample on the sample
disk is inadequate.
Sub-code groups
Routine/
stat samples:1 to 35
Control STD:36 to 57
W1 to W3 :58 to 60
Add sample.
551 to
552 SAMPLE SYRINGE 15 1S.STOP/ STOP The serum syringe does not reach the upper dead point. Check the upper dead point detector.
15 2S.STOP/
STOP The serum syringe does not go down from the upper dead
point.
Same as above
561 to
568 REAGENT PROBE 16 1STOP The reagent probe does not reach the upper dead point in
ascending motion.
Check the upper
dead point detector.
16 2STOP The reagent probe moves
down abnormally in
descending motion.
Check liquid level
detection.
16 3STOP The reagent probe does not
go down from the upper dead
point in descending motion.
Check the upper
dead point detector.
16 4WARNINGDetection of abnormal
descending motion of the
reagent probe remains on.
Check the
descending error
detector.

2 - 7
(cont’d)
Alarm
Control
No. Alarm Category Sub-
code Level Description Remedy
561 to
568 REAGENT PROBE 16 5 STOP When the reagent probe turns toward the cell, it
cannot detect the cell
position.
Check the home
detector.
16 6 STOP When the reagent probe
turns from the cell side to
other position, it does not
leave the cell position.
Same as above
16 7 STOP Before the probe goes down,
the liquid level detector is
already turned on.
Check liquid level
detection.
16 8 STOP In rotation of the reagent
probe, it is not set at the
upper dead point.
Check the upper
dead point detector.
581 to
593 REAGENT DISK 18 1 STOP The stop position of reagent disk cannot be detected. Check home detection or count
detector.
18 2 STOP The reagent disk does not
stop at the specified position. Same as above
18 3 STOP The home position of reagent
disk cannot be detected. Check home detection.
621 to
622 REAGENT SYRINGE 22 1 STOP The reagent syringe does not reach the upper dead point. Check the upper dead point detector.
22 2 STOP The reagent syringe does not
move down from the upper
dead point.
Same as above
641 ISE
SIPPER 24 1 STOP The sipper nozzle does not reach the upper dead point
(during resetting/
operation).
Check the upper
dead point detector of
ISE sipper.
642 ISE
SIPPER 24 2 WARNING/ STOP
(Note 4)
The sipper nozzle does not
leave the upper dead point. Same as above
661 to
662 ISE SYRNG 26 1 WARNING/ STOP
(Note 4)
The sipper syringe does not
reach the upper dead point. Check the upper dead point detector of
ISE Syringe.
26 2 WARNING/
STOP
(Note 4)
The sipper syringe does not
leave the upper dead point.
671 ISE STOP
OK ? 27 1 WARNING/ STOP
(Note 4)
The ISE function is stopped
due to alarm.
(This warning is indicated
when restart in the sampling
stop status was attempted.)
Check alarm log and
deal with the alarm.
NOTES: 3. S.STOP may be issued only during operation.
4. Though the photometry assay function works, the ISE function does not work.

2 - 8
Alarm
Control
No. Alarm Category Sub-
code Level Description Remedy
681 TEMP
CONTROL 28 1WARNING The water temperature of incubation bath is higher
than 45.0°C.
Check the thermistor
or thermostat of
heater.
28 2WARNING The water temperature of
incubation bath is outside a
range of 37 ± 0.5°C.
(This is checked only at
operation.)
Same as above
691 INCUBA-
TOR
WATER
29 1WARNING The water level of
incubation bath is too low. Replenish water or check the drain
solenoid valve.
701 REF
WATER 30 1WARNING A period of 24 hours has passed since exchange of
incubation bath water.
Exchange incubation
bath water.
711 DISTILLED
WATER 31 1STOP The water level of distilled water tank is too low.
(This alarm will not be
issued during initialization
and water exchange.)
Check the water level
sensor.
712 DIST
WATER 31 2WARNING The water level of distilled water tank is too low. Same as above
721 DIST
WATER
SENSOR
32 1WARNING The water level sensor in
distilled water tank is
abnormal.
Check float switch.
724 RESER-
VOIR 34 1WARNING The waste solution reservoir is full. Check waste solution tank detection.
771 SIPPER 37 1STOP The negative pressure of
vacuum pump is too low. Check vacuum level at vacuum suction.
781 VACUUM
TANK 38 1WARNING Water is accumulated in the vacuum tank. Check SV12 or SV14.
811 to
813 PHOTOME- TER LAMP 41 1WARNING In passed cell blank measurement, a value of
more than 3.3 Abs is
indicated in any one of 4
measurements.
(3 times or less)
(1)Replace light
source lamp.
(2)Check 12 V
power supply.
41 2S.STOP
(Restart
un-
allowable)
In passed cell blank
measurement, a value of
more than 3.3 Abs is
indicated for all of ADC1,
ADC2 and λ1to λ12.
41 3S.STOP
(Restart
un-
allowable)
The above alarm code 41-1
is issued 10 times
consecutively.
(cont’d)