C-Tech DKZ-5000 User manual

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CEMENT FLEXURAL TESTING MACHINE DKZ-5000

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CONTENTS
I. Application .......................................................................................................................................................1
II. Technical specifications .................................................................................................................................1
III. Structure ..........................................................................................................................................................1
IV. Operation .........................................................................................................................................................2
V. Maintenance ...................................................................................................................................................3
VI. Trouble and Solution ......................................................................................................................................4
VII. Circuit diagram ................................................................................................................................................5

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I. Application
The cement electric bending resistant testing machine is the necessary device to conduct test on
strength of bending resistant in the cement mortar. The device can also be used to test the bending
resistant strength of other cements and nonmetal fragile material.
This machine uses horizontal maximum output 1000N, using the parallel bars, maximum output
5000N, tester scale is designed to cement practice flexural strength of mortar and resistance of soft
conversion scale, maximum output is 1000N, the sensing accuracy of 0.4N and 0.001Mpa, the
maximum output is 5000N, read accuracy of 1N and 0.005 Mpa.
II. Technical specifications
Maximum flexural strength (N)
Single level: 1000 N
Double lever:5000N
The output ratio
Single lever: 10:1
Double lever: 50:1
Load speed
Single lever: (10±1)N/s
Double lever: (50±5)N/s
Load roller and support roller diameter
Φ10mm
Distance between the roller
100mm
Relative error value
<±1%
Lever Angle
>1/50
Dimensions
1075mm×250mm×760mm
Net Weight
85kgs
III. Structure

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(27) Base, (25)Stand column, (24)Top Beam (8)(9) Long and short pull rod, (17)(23) Big and Small lever; (18)Rise
angle indicator plate (6)Flexural Clamp (20)Counter weight; (15)(12)Big and Small counterbalance, (10)drive motor,
(22)Drive Screw, (28)Electrical control cabinet
IV. Operation
The machine should be put on the platform under no vibration environment, the platform must be
adjusted the level (1/1000).
When the force in the range of 5000N, (use double lever), hung the flxural clamp on the middle of
small lever blade (as shown in figure 1), If the force during 1000N (use single lever), you must
dismantle the small lever, the short pull rod (9) and force bearing base (7), then connect the long
pull rod (8) with the large lever, turn the bottom half part, screw it in to the nut (2) in the top half base
(27).
Before the test, connect the power, press the button on the cursor counter weight (21), to move the
counter weight to the left, let the cursor (19)’s zero line aimed at the scale (26)’s zero line, After
releasing the button, the scribed line may move, at this time, you can turn the screw rod, to move the
counter weight, let the two zero line coincident.
Adjust the zero setting contact screw (31), let it contact with the counterweight, then use the nuts
lock the zero contact screw, to checked the cursor and scale’s zero line whether coincident. If still

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can’t coincident, re-adjust the contact screw according to above method. Until the two zero line
coincident.
Release the lock nut (14) and (16), move the small and big counter-balance, let the big lever (17) in
the balance as far as possible, then turn the lock screw, lock the big counter-balance (15) on to the
big lever, move the nut (13), in order to move small counter-balance (12), Until the big lever in balance,
then lock the screw, lock the small counter-balance on to the big lever.
Note: the big and small counter-balance must lock reliable, to avoid the adjusted balance damaged
during the test.
Put the specimen in to the flexural clamp, aimed at the alignment plate, turn the hand wheel under
the clamp(1), let the load shaft (4) contact the specimen, and continue to turn a certain angle, let
the big lever have a rise angle, the data determined by the deformation when the specimen fracture,
the principle is that to keep the big lever in balance when the specimen at breaking, rise angle value
can be read from rise angle indicator plate (each cell is 2°). Press the “start” button in the electric
control cabinet, the motor (10) turns the screw rod to drive the cursor counterweight move to right,
the machine start to load, the big lever sink gradually, When the big lever close to balance, the
specimen fracture, the limit switch bump plate (29) push the limit switch, disconnect the motor power,
the motor stop work, at this time, you can read the flexural strength value from cursor scribed line
and scale.
Press the button (21), shift the cursor counterweight to the left, reset the cursor counterweight, you
can do the second test.
V. Maintenance
Keep the machine clean and day, especially, to avoid rusting, so as not to reduce the sensitivity
and accuracy.
The blade and blade bearing can’t have any lubricating oil, in order to avoid sticking dirt, block
the lever movement, impact the sensitivity, dust cover should be put after use.
The right limit switch bump plate in the big lever must be adjusted to let the limit switch start to
work when the big lever fall to the bottom, avoid to adjust it to let the limit switch work location
too early, so as not to damaged the limit switch.

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The cursor counterweight shouldn’t have too big moving before press the button , after long term
use, the cursor counterweight on the screw rod have obvious vibration phenomenon, you can
replace the half-nut.
When the cursor counterweight moving, you can pack some light paper on right shaft of the
screw rod
VI. Trouble and Solution
Trouble
Reason
Solution
After the sample rapture, can’t stop load
automatically.
1.The right travel switch damaged
2.The left boring block not depressed the
travel switch
1.Change the travel switch
2.Adjust the boring block Location.
After the sample rapture, the
counterweight forward a section of
distance
The half nut in the counterweight wear
out
Replace the half nut（Code No.:500-01-
03）
The big lever lost balance 1.Counter-balance location move .
2.The cursor counterweight did not
return the original zero
1.lock tight after re-adjust
2.Turn the screw rod , adjust it to zero
location.
Cursor counterweight button did not
return
1.there have dirt or burrs in the button
hole
2.Spring failure
1.Clean up
2.Replace the spring
Cursor counterweight stagnation There have dirt in screw rod and large
lever flat surface , or in counterweight’s
rolling bearing .
Clean up the screw rod and rolling
bearing in the counterweight.
he motor can’t start 1.the screw rotating part locked dead .
2.The motor or electrical components
damaged
1.Clean
2.Replace the components
The big lever swing one times namely
stop
1.the big lever support blade damaged
2.there have dirt between the blade
Replace the blade or clean it

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VII. Circuit diagram
With this , is motor number .
Code
Name
Model
Quy.
Note
C Capacitor CJ41-2A 1UT/630V 1
LX Travel Switch KWX 1
J Middle Relay JH1806 24V 1
B Rectifier transformers BKZ-25 ,1101 , 220V/-24V,-6.3V 1
D AC servo motors SD-75 110V 1

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