Interface LCT-1 Ultimate Manual de usuario
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 480.948.5555 • Fax 480.948.1924
www.interfaceforce.com • Email: contact@interfaceforce.com • 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 480.948.5555 • Fax 480.948.1924
www.interfaceforce.com • Email: contact@interfaceforce.com • ORDER TOLL-FREE 800.947.5598 3
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 480.948.5555 • Fax 480.948.1924
www.interfaceforce.com • Email: contact@interfaceforce.com • ORDER TOLL-FREE 800.947.5598 4
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 480.948.5555 • Fax 480.948.1924
www.interfaceforce.com • Email: contact@interfaceforce.com • ORDER TOLL-FREE 800.947.5598 5
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 480.948.5555 • Fax 480.948.1924
www.interfaceforce.com • Email: contact@interfaceforce.com • ORDER TOLL-FREE 800.947.5598 6
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 480.948.5555 • Fax 480.948.1924
www.interfaceforce.com • Email: contact@interfaceforce.com • ORDER TOLL-FREE 800.947.5598 7
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 480.948.5555 • Fax 480.948.1924
www.interfaceforce.com • Email: contact@interfaceforce.com • ORDER TOLL-FREE 800.947.5598 8
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
Interface Inc. • 7401 East Butherus Drive, Scottsdale, Arizona 85260 USA • Phone 480.948.5555 • Fax 480.948.1924
www.interfaceforce.com • Email: contact@interfaceforce.com • ORDER TOLL-FREE 800.947.5598 9
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 480.948.5555 • Fax 480.948.1924
www.interfaceforce.com • Email: contact@interfaceforce.com • ORDER TOLL-FREE 800.947.5598 10
Applying dierent 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...
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