Interface LCT-1 Ultimate User manual

LCT-1 Ultimate
Load Cell Tester
Issue: 15-256 Revision A
User’s Guide
www.interfaceforce.com

Interface Inc. • 7401 East Butherus Drive, Scottsdale, Arizona 85260 USA • Phone [phone] • Fax [phone]
www.interfaceforce.com • Email: [e-mail] • ORDER TOLL-FREE 800.947.5598 2
LCT-1 Ultimate
Specifications
• Insulation resistance { 5 GΩ at 10% accuracy (Min. >10 MΩ)}
• Input and output resistance: { 5 kΩ at 0.5 Ω resolution & ± 0.5 Ω accuracy}
• Sense resistance (for 6 wire L/C): up to 500 Ω at 0.1 Ω resolution
• Load cell output in percentage of full scale (input resistance > 175 Ω): ± 250%
at 0.01% resolution and 0.1 % accuracy
• Gain adjustment: {0.1 to 5 mv/V in steps of 0.01} of accuracy
• High resistance test: 10Vdc
• 16 bit A/D conversion
• Bridge test: 1.25Vdc
• Industrial 8-pin screw connector
• Bridge resistance and integrity
• Very user freindly, full test within seconds
• Size: 150mm x 80mm x 28mm; Weight: 250g
• Check 4 or 6-wire Load Cell connecting at all rated gain output
• Rugged ABS enclosure with rubberized over case for drop protection
• Continuous signal reading for checking linearity and repeatability
• Insulation resistance (points to moisture or chemical ingress)
• Physical distortion (zero balance)
• Alphanumeric display: 16 x 2 lines
See how simple it is...
How Do You Use It?
Main Features

Interface Inc. • 7401 East Butherus Drive, Scottsdale, Arizona 85260 USA • Phone [phone] • Fax [phone]
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Follow the pin assignment and connect the Load Cell
Cable to the connector:
In case you wish to check the isolation between
the L/C body and the bridge, connect the body to pin 8.
Important: Make sure NOT to connect the SCREEN (shield) and
BODY (PINs 7 & 8) at this stage!!
+ =

Interface Inc. • 7401 East Butherus Drive, Scottsdale, Arizona 85260 USA • Phone [phone] • Fax [phone]
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Now turn on the LCT by pressing and holding the
ON/OFF key () for two seconds (a). You will see the title
screen (b). After about six seconds, the following screen appears (c).
a
bc
For inital calibration, press simultaneously the two right keys for just a second (a)
until you see the "Calibrating..." screen - which will display for three seconds (b).
a b
Choose type of Load Cell
In order to save battery, the backlit LCD display turns off if nothing is done for 15 seconds. To turn the dis-
play on, just push any arrow key that won't affect your settings or your current menu. To shut off the unit,
press the Enter key () for a few seconds, or leave it on. It will turn off automatically after a few minutes.

Interface Inc. • 7401 East Butherus Drive, Scottsdale, Arizona 85260 USA • Phone [phone] • Fax [phone]
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Choose type of Load Cell
by pressing the up or down arrows.
Next, press the Enter key ( )
Now you may connect the SCREEN and BODY (pins 7 & 8)
4 wires
or
6 wires

Interface Inc. • 7401 East Butherus Drive, Scottsdale, Arizona 85260 USA • Phone [phone] • Fax [phone]
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Choose L/C gain by pressing the up or down arrows, changing
the number by increments of hundreths (or by speeding
through tenths if you hold the button down).
Note: L/C details can be found on the Calibration Certificate that came with the load cell.
In case of the absence of such a certificate,
you may stay with the default gain of 2mv/v.

Interface Inc. • 7401 East Butherus Drive, Scottsdale, Arizona 85260 USA • Phone [phone] • Fax [phone]
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Press the Enter key ()
Initiating the LCT test
Press the Enter key () again
for LCT...
LED is blinking...
The unit will display
"END OF TEST" when complete
Test in progress...
i
iii
ii
iv

Interface Inc. • 7401 East Butherus Drive, Scottsdale, Arizona 85260 USA • Phone [phone] • Fax [phone]
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Scrolling through the results
Press the up key to scroll results... Bridge Input and Output Resistance Results
In case of a suspicious
reading, the LED turns red.
As you go through, press the up key
whenever you want in order to scroll to the
next result until you see this screen again.
Signal output of load
cell rated output
Note: When Load Cell is not loaded, the output should
be around 0% (zero balance). Reference the loadcell
specification for acceptable zero balance range.
(in percentage)
1
3
2a
2b

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4a 4b
7
56
Note: LED turns red in
case of low insulation
resistance
Insulation resistance testing:
Shield to Bridge
Insulation resistance testing:
Body to Bridge
Insulation resistance testing:
Shield to Body
End of results
To scroll again, press the up arrow. For a new test
press the Enter key ()
The LCT-Ultimate can also continuously display the
load cell signal in percentage of L/C full capacity.
Just push the down
arrow key after entering
load cell parameters.

Interface Inc. • 7401 East Butherus Drive, Scottsdale, Arizona 85260 USA • Phone [phone] • Fax [phone]
www.interfaceforce.com • Email: [e-mail] • ORDER TOLL-FREE 800.947.5598 10
Applying di󰀨erent weights
to check the linearity
Model LCT-1 Ultimate is being calibrated with Model SM-100 (shown above)
and the max weight is set for 100lbf (45,400gf). For Model SM-100, the
maximum zero balance is ±1.0% FS. When Model SM-100 (pictured above)
was measured, the zero balance was actually +0.25%.
In this mode, the LED flickers different colors
*Signal output when scale is empty*
Applying 800g calculates the
reading to 2.01%, and so on...

Interface Inc. • 7401 East Butherus Drive, Scottsdale, Arizona 85260 USA • Phone [phone] • Fax [phone]
www.interfaceforce.com • Email: [e-mail] • ORDER TOLL-FREE 800.947.5598 11
Applying di󰀨erent weights
to check the linearity
Apply 100g onto 45.4kg L/C,
calculating the reading to be 0.47%
----------------------------------------------
(100g / 45400g) x 100 = 0.22%
♦
0.25% + 0.22% = 0.47%
Apply 300g onto 45.4kg L/C,
calculating the reading to be 0.91%
----------------------------------------------
(300g / 45400g) x 100 = 0.66%
♦
0.25% + 0.66% = 0.91%
LED continues to flicker different colors
Applying 800g calculates the
reading to 2.01%, and so on...

Interface Inc. • 7401 East Butherus Drive, Scottsdale, Arizona 85260 USA • Phone [phone] • Fax [phone]
www.interfaceforce.com • Email: [e-mail] • ORDER TOLL-FREE 800.947.5598 12
Warranty
The LCT-1 Ultimate is warranted against defective material and workmanship for a period of (1) one year from the date of dispatch.
If the Interface, Inc. product you purchase appears to have a defect in material or workmanship or fails during
normal use within the period, please contact your Distributor, who will assist you in resolving the problem. If it is
necessary to return the product request an RMA # and include a note stating name, company, address, phone
number and a detailed description of the problem. Also, please indicate if it is a warranty repair. The sender is
responsible for shipping charges, freight insurance and proper packaging to prevent breakage in transit.
The warranty does not apply to defects resulting from action of the buyer such as mishandling, improper interfac-
ing, operation outside of design limits, improper repair or unauthorised modification. No other warranties are
expressed or implied. Interface, Inc. specifically disclaims any implied warranties of merchantability or fitness for a
specific purpose. The remedies outlined above are the buyer’s only remedies. Interface, Inc. will not be liable for
direct, indirect, specInterface, Inc. will not be liable for direct, indirect, special, incideacntal or consequential
damages whether based on the contract, tort or other legal theory.
In the interests of continued product development, Interface, Inc. reserves the right to alter product specifications
without prior notice.
Doc 15-256 Revision A Issue 1.0 Dated 01/06/17