Digital Torsion Meter for lamp cap test force
Description:
Lamp cap Torsion Meter is a newly developed intelligent product
with microprocessor built-in.The digital torsion meter is a
mechanical strength safety requirement of the lamp cap which has
been taken into account by most lighting manufactures and is also
compulsively required by all the nations. Thus we developed the
digital torsion meter with the reference of the IEC. It meets the
requirement for the measurement of lamp cap torque force test of
the quality inspect de-partment and manufactures.
Characteristics:
1) It can measure the clockwise and anti-clockwise torque of lamp
cap. And it can preset upper limit alarm. Auto save data after
system shutting down.
2) Instrument has the function of zero point calibration. The zero
point is very steady. Instrument uses 4 digits of number to
display. So it is of high accuracy and high stability.
3) Double watchdogs designed inside to ensure the instrument high
reliability and will not shut down under complicated environment.
4) Instrument is convenient to be used because of several clamps of
lamp caps such as E27/E26, B22d, E14/E12, G13/G5 and so on.
5)Fixing with clamp. Rotating the lamp, the positive and negative
torque rate will be recorded.
6)Torque range: 0-10N*m (special range is customer-tailored).
7)High performance in reliability, precision and longevity by adopt
strain gauge torque sensor
8)Peak torque holding function, upper limit can be set for alarm.
9) Conform to Chinese and international standard.
Specification:
| Range | 0~10N•m |
| Accuracy | ≤1% |
| Repeatability | ≤0.5% FS |
| Linearity | ≤0.5% FS |
| Lag | ≤0.5% FS |
| Over loading | 120% FS |
| Temperature compensate range | -10°C~60°C |
| Requirements for environment: Working temperature | 25±5°C Relative humidity: ≤65%R.H Power: AC 220V±10V, 50Hz±1Hz |
| Permissions for environment | Working temperature: 0-40°C Relative humidity: ≤75%R.H Power: AC
220V±10%, 50/60Hz |
| Store condition | Temperature -20~50°C |
| Humidity | <75%R.H |
| Dimension | 333mm×114mm×307mm |
| Weight | 6kg |
| Power | 15VA |
Basic Principle
The equipment is consisted by torsion device and secondary meter.
The key for accuracy is the
torque sensor. The equipment adopt strain type torque sensor with
the features of high reliable,
cost-effective, high accuracy and long life.
In sensor on the elastomer labeled resistance strain gage and
composition Wheatstone bridge. Power
the bridge with driving voltage, under the action of the torque,
the elastomer will deform and the
strain gage will change, so that the bridge will imbalance and
there is a linear voltage signal
between bridge output and torsion. The secondary meter will be
amplified the voltage signal, and transform the signal by A/D
transformer, and then send to the microprocessor for data analysis
and
display. Functional block diagram as following:
Fig.1 Functional block diagram
KP338 digital torsion meter is applied to measure torsion of all
kinds of lamp holder.
Operation Instruction
5.1 Front panel and function
Specification:
1. Window: 5-digit displays the measurement and prompt message.
2. Indicator
SAMP:The equipment is on the sampling mode when it flashes. Refresh
frequency: 2times/s.
3. ZERO:The equipment is on the zeroing mode when it flashes. .
4. PEAK:The equipment is on the peak holding mode when it flashes.
5. BELL:Indicate to showdown the buzzer.
Keyboard
ZERO:On the test condition, press this key to enter into zeroing
mode, after finish the zeroing, the
equipment will save the data and re-back to test mode
automatically. On the peak condition, press
the key to clean the value.
SET:On the normal test condition, press this key to set the upper
limit alarm.
PEAK:On the normal test condition, press this key to hold the peak
value; press again this key to
re-back to normal test mode.
∧ :On the set and calibration mode, press this key, the cursor will
tally up.
∨ :On the set and calibration mode, press this key, the cursor will
tally down.
> :On the set and calibration mode, press this key, the cursor
will right shift.
• :On the set and calibration mode, press this key, decimal point
insert.
5.2 Real panel and function
1. Signal input and output port: for signal transmission.
2. Protective tube: 0.5A fuse to protect the equipment power.
3. Power plug: Inclusion filter to stop the disturbance.
5.3. Lamp holder torsion test
Firstly, confirm the holder model; then install the corresponding
fixture, and mounted the lamp
holder on the clamp.
Connect the torsion device with equipment by signal input port.
Turn on the secondary meter to
preheat for 5min. If the window is not equal to 0.000, then
equipment should be zeroed. User can
set an upper limit according to the Chinese or international
standards. Clockwise rotation and contra
rotate the lamp holder. During the time, the window will show the
current value; until the
equipment alarming, user can judge if the lamp holder is still in
the good condition.
5.4. Zeroing
After long time using, the equipment may be zero drift, and affect
the accuracy. At that time, the equipment must be zeroed. But
please notice, the torsion sensor cannot be worked. Press “zero”
key,the window will display “ZERO”, and then “ZERO” indictor will
flash; If the user do not want to
continue, just press “peak” key to exit. When the “ZERO” indicator
turns off, that means the equipment finish the zeroing and re-back
to normal.
5.5. Upper limit
Press “SET” key, the window will show “SET”; If the user do not
want to continue reset, press“PEAK” key to exit. With the help of
“＞”,“∧”,“∨”,“·” keys to set the upper limit, press again“set” key
to save and exit. If user do not want to save the value, just press
“PEAK” key to exit set mode.
5.6. Calibration
The equipment has been calibrated before on sale. Users do not need
to re-calibrate it. But there is deviation after long time no use,
which will affect the accuracy. At that time, the equipment needs
some special device to re-calibration.
Apply a certain torque to the torque sensor (forward direction or
reverse direction), in the normal test mode, 5 times press “.” key,
and then press “SET” key, the window will display“CAL.R”when user
apply a forward torsion to the torque sensor; At that time, if user
does not want to do recalibration, just press “PEAK” key to exit.
If user wants to do calibration, just press “set” key, the
equipment will in the forward calibration mode, and at that time,
the window is showing the calibration value of last time. If the
value is difference, just reset the standard value with the help of
“ ＞ ” ,“∧” ,“∨” ,“·” keys. Press again “CAL” key, the equipment
will display calibration coefficient, then you can reset the
calibration coefficient with the help of “＞”,“∧”,“∨”,“·” keys.Or
just press “CAL” key, and then input the standard value and
standard coefficient. If user does not want to save the data, just
press “peak” key to exit. The reverse calibration is as same as
forward calibration.
If the coefficient is lost, just input the below calibration
coefficient to the equipment.
Notice
1. Forbidden overload use, otherwise will reduce the property.
2. Forbidden beat and crash while install the load and clamp.
3. Forbidden oil stain, water and other chemicals.
4. Preheat for 5 min before test.
