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For over two decades, K-Tech International has provided worldwide the NYLOAD® Intelligent Load Weighing System. This cost effective load weighing solution is ideal for all traction elevator environments including both isolated and non-isolated cabs. Now we present the next step in elevator load weighing, the...
K-Weigh Intelligent Load Weighing
K-Weigh Intelligent Load Weighing
...to provide all the features and functions you have come to expect, with the additional benefit of easy installation and automatic re-calibration.

Interface With Virtually Any
Elevator Controller

The K-Weigh will provide to the controller the information necessary to optimize elevator traffic flow and improve passenger safety and comfort. It will provide signals to support a variety of controller functions including:

  • Overload
  • Hall Call Bypass
  • Anti-Nuisance
  • Motor Pre-Torque
  • Light Load Dispatch
  • Lobby Dispatch
  • Heavy Load Dispatch

The K-Weigh can provide load weighing information to the traction elevator controller in the following signal formats:

  • Analog
  • Discrete
  • Current
  • Digital

Universal Load Weighing Solution

K-Tech load weighing is ideal for both modernization and new construction of traction elevators. Using crosshead mounted strain gauge technology, the deflection sensor is designed to work on both isolated and non-isolated cabs.

There is no need for any cab renovation, such as replacement of isolation pads or re-squaring, since these factors do not affect the bending of the crosshead under the strain of the load. Additionally, installation does not require major work, like jacking up the cab off the frame, so it can be easily completed in one day.

Installation is easy

The initial installation of any load weighing system is the most critical part of a successful application. The design of the K-Weigh incorporates several innovations to make it easier to do it right the first time:

  • The sensor mounting holes are aligned and drilled using the included drill guide. You can be sure the holes are placed properly without any measuring. This guide doubles as a sturdy sensor guard to protect it after installation.
    • LED indicators for easy calibration
  • The calibration of the system is done using LED indicators. This allows you to make and check adjustments easily, quickly, and accurately without the need for a voltmeter.

Automatic Reset

Automatic Reset ensures that settings stay put. The K-Weigh will maintain the original calibration and eliminate measurement errors from emergency stops, seasonal temperature shifts, and other changes to the car's frame.

Automatic Reset can be triggered automatically through a signal from the elevator controller, or manually by a simple button press.

Specifications

System

Enclosure:

steel NEMA Type 1 (standard)
8 1/4"H x 14"W x 3"D (210 mm x 360 mm x 76 mm)
8 1/4"H x 115 1/2"W x 3"D (210 mm x 390 mm x 76 mm) with flange

Sensor(s):

1"H x 7"W x 1/4"D (26 mm x 178 mm x 6.4mm) bar; 8' (2.4 m) cable

Power Input:

100 - 240 VAC, 47 - 63 Hz; 0.6 A @ 115 VAC; 0.45 A @ 240 VAC

Output:

1 - 8.5 VDC (Analog system)
NO/NC dry contacts (Set Point system)
pleas call for other output options

Resolution:

< 50 lbs (< 23 kg) or 2% (typical installation)

Repeatability:

< 2%

Temperature:

32 to 158°F (0 to 70°C)

Humidity:

20 - 85% non-condensing

Drift/°F:

0.3% of FS (typical, without Auto Reset)

Zero Reset:

< 1%

   Correction:

± 40% offset (~ 4 VDC)

   Input:

120 VAC ground (pull-down)

Approvals:

ETL (UL & CSA) Safety
Conforms to ASME Std. A17.5
Certified to CAN/CSA Std. B44.1
Function Modules (Set Point System)

Compensator Module

Input:

Requires NO/NC contact closures for UP and DOWN direction and FLOOR COUNT (or optional UP and DOWN COUNT); up to 64 counts (standard) (Pulse width: minimum 10 ms for NO contact, 120 ms for NC contact (NO/NC between floors))

Output:

0 - 5 VDC signal into 1 KΩ load

Set Point Module

Adjustments:

0 - 100% of maximum load

Output:

Two independent DPDT NO/NC contacts rated 10 A - 28 VDC; 1/4 HP - 120 VAC

Bypass Module:

Adjustments:

Set and Reset 0 - 100% of load (Reset < Set)

Output:

Single DPDT NO/NC contacts rated 10 A - 28 VDC; 1/4 HP - 120 VAC

Lock Out Relay Module:

Input:

Requires 120 VAC @ 50/60 Hz (typically from elevator door switch)

Output:

Single DPDT NO/NC contacts rated 1/3 HP - 120/240 VAC

To configure the most cost effective load weighing solution for your unique
building or customer requirements, fill out and submit the
K-Weigh™ Intelligent Load Weighing System Configuration Checklist
or call K-Tech International.
 

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