KYOWA BCD-5B Instruction Manual

ＢＣＤ－５Ｂ Crack Displacement Transducer INSTRUCTION MANUAL
Thank you for purchasing the KYOWA product. Before using it,
please read this instruction manual carefully. Also, keep the manual
within easy reach so that you can refer to whenever necessary.
Specifications and dimensions described in this manual could be
changed without notice. Please visit our website for the latest version.
1. Calling the operator's attention
The following cautionary symbols and headlines are used to invite
the operator's attention. Be sure to observe the accompanying
precautions in order to safeguard the operator and preserve the
performance of the instrument.
Caution It is a precaution to operate properly.
2. Handling precautions
Caution
 Check that the stress transducer's manufacturing number
agrees with the calibration sheet.
 Using the tester, check that the transducer's insulation
resistance is 100MΩ/50VDC or higher. Do not use a tester
whose voltage exceeds 50VDC.
 Using the tester, check that the transducer's input/output
resistance are as follows.
Input resistance (between red and black wires): approx. 350Ω
Output resistance (between white and green wires): approx.
350Ω
 Avoid hitting or other shocks on the transducer, or
disconnection or damage may occur. If shocks should be given
to the transducer, its performance stability may be adversely
affected in long-term continuous operation.
 For transit, keep the transducer in its case. If it is carried by
holding the cable only, the cable may damaged to cause
disconnection and/or deterioration of the insulation resistance.
Measurement may thus become impossible.
 Do not disassemble the transducer.
 When storing, sure to put the accessory vinyl cap on the end of
the cable, and to avoid water, oil, dust, etc.
 Make sure that the bending radius of cable is longer than
6 times of a diameter of the cable.
3. Installation
3.1 Dimensions
80
(44)
115
(300)
80
(104.5)
(95) 90
3.2 How to install
 How to install the anchor bolts
Install the anchor bolts at a spot where it is possible to bore
through rock and not far than 80 to 140mm from the center of
the crack on the lock surface.
The bore diameter will be 11 to 13mm (to meet M10 bolt) and
more than 50mm deep.
Bolt hole
80 to 140mm
 Cut the anchor bolts in advance so that it will be as long as the
depth of a hole added by 50mm. (for instance, it the bore is
60mm deep, cut it to 110mm 60+50=110) or so.
 Installing the anchor bolts
Clean the bore, then insert the anchor bolt in it while filling up
the bore with stiff-consistency mortar.
After insertion, leave the bolt installations as they are for about
one day, then take to the next procedures.
Install bolts
When inserting bolts, tie tape around this section
perpendicularly.
to prevent mortar form sticking to screws.
 Installing the crack displacement transducer Fix the crack
displacement transducer with nuts.
 Connect the transducer cable to the measuring instrument.
While watching the measuring instrument's readings, obtain the
initial unbalance value stated in the calibration sheet. Do this by
moving the transducer at the one side where it is fixed.
Note: When working to obtain the initial unbalance value, keep
a tolerance within ±5(μV/V).
Move the
transducer.
IM-T-216E Sep. 2019
Crack
80 to 140mm
Mortar
Anchor bolt
Install bolts
in a straight line.
Fix with nuts.