Atex Load Cell Instruction Manual
Zemic Europe B.V.
T: +31 76 50 39480
Leerlooierstraat 8
Nr. 2021.06 Atex Load cell instruction manual Rev5
F: +31 76 50 39481
4871 EN Etten-Leur
The Netherlands
5/12
Specifications and dimensions are subject to change without notice and do not constitute any liability whatsoever.
(3)Our company doesn’t agree customers to repair by themselves to avoid expand problems. If d
ue
to customers’
repairman occurs extra problems even it is in maintaining guarantee service time our
company will not provide free service.
(4)Generally speaking, when non- load cells customers or non- weighing instrument customers use
our products if the problems occur, the products should be sent to company or inform company
engineers’ problems condition by
fax to solve the problem in short time and correct methods.
5. Failure Analysis and guidance on potential misuse
5.1 Failure Phenomenon
5.2 Cause analysis
5.3 Guidance
After assembly of a scale, the
reading of empty load is big and
hard to set to zero.
The Load Cell might have been
overloaded and plastically
deformed due to shock load or
impact load.
The mounting and load
introduction might not be
correct and influence the free
deflection of the load cell.
Disconnect all load cells from
electronics. Re-connect one by
one and check the individual
zero readings. If one with
exceptional high or low reading
than replace that unit. Check all
installations if no external
factors are influencing the free
deflection of the load cell.
Weighing capacity error varies
directly with the increase of
load, use multimeter to
measure input and output
impedance, one line or several
lines and other lead
wires’
resistances are very large.
Load cells’ outgoing lines or
connection terminals are being
stroke, pressed or stretched
and make the circuit in the wire
brake.
The outgoing line should be
protected with spring sheath,
thus avoid the lead wire from
being extended or pressed to
slot. Because of foundation pit,
do trial assembly many times
and remove load cells if
possible.
Use multimeter to measure
input and output impedance,
the resistances are 1100-
1410Ω(bridge resistance
700Ω)or
500-
710Ω(bridge
resistance 350Ω)
Being lighted or stroke by
strong current or voltage
impulse, bridge arm is burned
Adapt up-side-down mounting,
that is to say, backward under
the weighing platform; give
priority to ground mounting
by setting slope to two ends. If
designing foundation pit,
blowing pipe diameter should
meet the demand for water
discharge on rainy days.
Lower sensitivity, poor
interference-resistant,
widespread fluctuation of
weighing capacity data.
The shield connected to other
resources (with charge).
If the shield is not needed, pack
it with insulating tape and put it
into junction box to avoid the
touch with bridge-type
connection terminal.
No zero return
The speed on vehicle scale may
be too fast.
The speed should be limited
within 10km/h.
Rick to life! :
Under no circumstances should fault location and trouble-shooting be attempted in a
hazardous area where there is danger of explosion. ZHONGHANG ELECTRONIC MEASURING
INSTRUMENTS CO., LTD. authorized personnel may only carry out trouble-shooting and repair.
Should a load cell cease to function, do not just reconnect: Mechanical failure may have catastrophic
effects.
