Tanaka AKV-202 User manual

Automatic Kinematic Viscosity
Measuring System
Model: AKV-202
Maintenance Manual
Ver. 1.01 070706
Read this manual thoroughly before using the product,
and store in a safe place for future reference.
TANAKA SCIENTIFIC LTD, TOKYO, JAPAN

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FOREWORD
Thank you for purchasing Model AKV-202 from Tanaka Scientific Limited.
This Maintenance Manual includes necessary information for the re-adjustment and
repairing of AKV-202. Please read this Manual thoroughly to understand the contents
before maintenance.
This manual employs the following precautionary notation. For your safety, ensure that
you understand these precautions and heed them at all times.
! WARNING:
Warnings indicate a significant risk of death or serious
physical injury if the information is ignored.
! CAUTION:
Cautions indicate a significant risk of physical injury or
property damage if the information is ignored.
INTENDED READER OF THIS MANUAL
This Manual has been intended to be read and understood by all those who operate
AKV-202.
REVISIONS
The contents of this Manual may be subject to change without prior notice.

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Contents
FOREWORD.................................................................................................................................1
INTENDED READER OF THIS MANUAL.....................................................................................1
REVISIONS ..................................................................................................................................1
Contents........................................................................................................................................2
1 Periodical Inspection ..............................................................................................................4
1.1 Checking Temperature Calibration Input (Frequency: about once a month) ...................4
1.2 Checking Temperature Display (Frequency: about once every three months)................4
1.3 Inspecting the Bath Overheat Cutoff Device (Frequency: about once every three
months) ........................................................................................................................................4
2 Adjustment Method ................................................................................................................5
2.1 Editing Test Mode............................................................................................................8
2.2 Setting Viscometer Number and Constants ..................................................................10
2.3 Setting and Correcting Bath Temperature .....................................................................10
2.4 Setting Sample ID .........................................................................................................11
2.5 Setting Operator Name .................................................................................................12
2.6 Setting Printer and Communication Port .......................................................................12
2.7 Setting built in Clock......................................................................................................13
2.8 Setting the Password ....................................................................................................14
2.9 Printing Set Contents ....................................................................................................15
3 Confirmation of Optical Projector/Receiver ..........................................................................16
4 Counter Check .....................................................................................................................17
5 Test Result History ...............................................................................................................18
6 System Information ..............................................................................................................19
7 Problems and Solutions .......................................................................................................20
7.1 Trouble shooting with Error message............................................................................20
7.1.1 Photo Adjust...........................................................................................................20
7.1.2 Suction Time ..........................................................................................................20
7.1.3 Time Over ..............................................................................................................20
7.1.4 Photo Unstable ......................................................................................................20
7.1.5 Temp Sensor..........................................................................................................20
7.1.6 A/D Error................................................................................................................20
7.1.7 Bath Level..............................................................................................................21
7.1.8 Bath Overheat........................................................................................................21
7.1.9 Replace Battery .....................................................................................................21
7.2 Troubleshooting without Error message........................................................................21
8 Parts Replacement Procedures ...........................................................................................22
8.1 Control Part Replacement.............................................................................................22

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8.1.1 CPU Board.............................................................................................................22
8.1.2 ROM ......................................................................................................................22
8.1.3 Internal battery.......................................................................................................22
8.2 Bath Section Part replacement .....................................................................................23
8.2.1 Removing Bath ......................................................................................................23
8.2.2 Removing the top lid of the bath ............................................................................23
8.2.3 Replacing the heater..............................................................................................24
8.2.4 Replacing the stirrer motor.....................................................................................24
8.2.5 Replacing the temperature sensor .........................................................................25
8.2.6 Replacing the fluorescent lamp..............................................................................25
8.2.7 Replacing the glow lamp for the fluorescent lamp..................................................26
8.2.8 Replacing the light guide (optical fiber) ..................................................................26
8.2.9 Replacing the optical projector/receiver board.......................................................27
8.2.10 Suction pump.........................................................................................................27
8.2.11 Replacing the solenoid valve .................................................................................28
8.2.12 Aligning the solvent dispenser head and the viscometer .......................................28
8.2.13 Safety devices........................................................................................................29

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1 Periodical Inspection
To maintain the Tester’s performance and to ensure safety, be sure to inspect this Tester periodically.
1.1 Checking Temperature Calibration Input (Frequency: about once a month)
Using the later procedure 2.3.3, check that an input temperature offset value is stored in the memory
correctly.
1.2 Checking Temperature Display (Frequency: about once every three months)
Using the later procedures 2.3.1 to 2.3.2, check that the value displayed on this Tester matches one
indicated by a glass thermometer.
1.3 Inspecting the Bath Overheat Cutoff Device (Frequency: about once every
three months)
Inspect the bath overheat cutoff device as follows:
(1) Turn the MAINS switch ON.
(2) Press the BATH CONT. key to start bath temperature control.
(3) Set the cutoff temperature for the bath overheat cutoff device to a value lower than the current
bath temperature.
(4) The device is functioning normally if the screen shown below is displayed indicating a trouble.
T R O U B L E TROUBLE
E r r o r 0 8 Error 08
B a t h O v er H e at Bath Over H e at
P r e s e t : 1 40.00
B a t h T e mp : 40.00
Fig. 1 Bath Overcut Error Message
(5) Return the bath overheat cutoff device to its original setting.

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2 Adjustment Method
The test mode can be edited and the bath temperature can be set by using the panel switches in the
following way.
While depressing the FUNCTION key, press and release the RESET key to display the screen shown
in Fig. 2.
[ M E N U ] P a g e :1/3
0 1 E d i t M o d e
0 2 E d i t V i s c ometer
0 3 E d i t B a t h Preset
0 4 E d i t S a m p le ID
0 5 E d i t O p e r ator
0 6 P r i n te r & Comm. Port
Fig. 2 MENU Screen (Page 1)
01: Edit test mode -> See section 2.1 on page 8.
02: Edit Viscometer information -> See section 2.2 on page 10.
03: Edit Bath Preset Temperature -> See section 2.3 Page 10.
04: Edit Sample ID -> See section 2.4 on page 11.
05: Edit Operator Name -> See section 2.5 on page 12.
06: Printer and Communication Port Setting -> See section 2.6 on page 12.
[ M E N U ] P a g e :2/3
0 7 S e t Cl o c k
0 8 P a s s wo r d Setting
0 9 P r i n t A L l Parameters
1 0 P h o t o C h e ck
1 1 C h e c k C o u nter
1 2 H i s t or y
Fig. 3 MANU Screen (Page 2)

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07: Built-in Clock Time Setting -> See section 2.7 on page 13.
08: Password Setting -> See 2.8 on page 14.
09: Print All Parameters -> See section 2.9 on page 15.
10: Meniscus Sensor Photo Check -> See section 3 on 16.
11: Check Counter -> See section 4 on 17.
12: Recall the last 50 results in Memory -> See section 5 on page 18.
13: System Information -> See section 6 on page 19.
14: Return -> Return to STANDBY screen
[ M E N U ] P a g e : 3 / 3
1 3 S y s t em I n formation
1 4 R e t u rn
Fig. 4 MENU Screen (Page 3)
Press the up or down key to make an edit item flash. The page can also be changed using the
up/down keys.
Press the ENTER key to display an input screen.
Change the contents as follows:
(1) Move the cursor to an edit item using the up/down keys.
(2) Press the left or right key to change the cursor to single character size for editing.
(3) Move the cursor to the numeric value to be changed using the left/right keys and then change
its value using the up/down keys.
(4) Press the ENTER key to exit editing mode.
(5) To edit another item, repeat steps (1) to (4).
(6) After completing editing, move the cursor to [Set] using the up/down keys and press the
ENTER key. The cursor moves to [14. Return].
(7) Press the ENTER key to return to the test mode MENU screen.
(Note) If the ENTER key is not pressed at [Set], the screen shown below is displayed.

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D o y o u sa v e it?
Y e s N O
Fig. 5 Save Screen
Move the cursor to [Yes] to save the edited contents or move it to [No] to cancel them and then press
the ENTER key.
Print the edited contents and keep a hard copy. A hard copy will be necessary when the memory
backup battery runs out (after approximately 5 to 7 years).

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2.1 Editing Test Mode
Up to 20 test modes can be registered in this Tester.
Make [Edit Mode] flash and then press the FUNCTION key to display the screen shown in Fig. 6.
[ M o d e ] P a g e :1/3
N o . : 01
S t a t e : Active
N a m e : AAAAAAAA
V i s c o m e te r : 01 TLZ1 1111 1
W a i t : 30 [min]
S u c t i o n : Weak
Fig. 6 Mode Screen (Page 1)
No.: Test Mode No. (01 - 20)
State: Active or inactive (If inactive is selected, this mode does not appear in the standby screen.
Name: Sample type, etc can be entered so that the operator can select appropriate mode easily.
Viscometer: Enter viscometer name which is used in this mode.
Wait: Enter wait time before sample temperature touching bath temperature.
Suction: Weak or Strong. Select Strong only when sample get over like following figure.
[ M o d e ] P a g e :2/3
D i s c h a r ge : 45 [sec]
P o u r 1 : 0.5 [sec]
D i p 1 : 10 [sec]
V a c u u m 1 : 10 [sec]
W a s h T i me s 1 : 10
P o u r 2 : 0.5 [sec]
Fig. 8 Mode Screen (Page 2)
Fig. 7
Air Sample

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(a) Discharge: Discharge time of the sample
(b) Pour1: Dispensing time of solvent 1
(c) Dip1: Soaking time of solvent 1
(d) Vacuum1: Discharge time of solvent 1.
(e) Wash Times1: Number of times steps (b)~(d) are repeated.
(f) Pour2: Dispensing time of solvent 2
[ M o d e ] P a g e :3/3
D i p 2 : 10 [sec]
V a c u u m 2 : 10 [sec]
W a s h T i me s 2 : 05
D r y : 15 [min]
Set
Return
Fig. 9 Mode screen (Page 3)
(g) Dip2: Soaking time of solvent 2
(h) Vacuum2: Discharge time of solvent 2
(i) Wash Times2: Number of times steps (f)~(h) are repeated
(j) Dry: Drying time of capillary and N Tube
Set test conditions at each mode registration number.