Graphtec GL7-DCO 8 Channel Voltage Output Module for GL7000

• 500 Hz sampling rate
• 3 selectable units of measurement
• Ultra-compact, ergonomic housing
• Configurable default measurement unit and mode
• Calculates peak tension and compression values
• Powered by 9V battery or available AC adapter
• Reversible housing for alternate load cell orientation
• Large, backlit graphic display with auto-dimming

Mark-10 Series 2 digital force gauge, designed for tension and compression force testing applications from 2 to 500 lbF (10 to 2,500 N) full scale. The Series 2 is an essential component of a force testing system, typically also comprising a test stand and grips.

With proper usage, we are confident that you will get many years of great service with this product. Mark-10 force gauges are ruggedly built for many years of service in laboratory and industrial environments.

This User’s Guide provides setup, safety, and operation instructions. Dimensions and specifications are also provided. For additional information or answers to your questions, please do not hesitate to contact us. Our technical support and engineering teams are eager to assist you.

Before use, each person who is to use the Series 2 force gauge should be fully trained in appropriate operation and safety procedures.

Overview

Series 2 digital force gauges are designed for basic tension and compression force testing applications up to 500 lbF (2,500 N). Peak tension and compression readings are reliably captured via the gauges' ±0.5% accuracy and 500 Hz sampling rate. A backlit graphic LCD displays the current, peak tension, or peak compression reading.

The gauges are overload protected to 150% of capacity. An ergonomic, reversible aluminum housing allows for hand held use or fixture mounting, rugged enough for applications in both production and laboratory environments. Series 2 gauges are directly compatible with Mark-10 test stands and grips.

Battery life is approximately 24 hours with the backlight on, or 92 hours with the bac klight off. To change the battery, loosen the two captive screws on the ba ck side of the housing and separate the two housing halves. A foam strip separates the battery from the PCB.

Ensure that the foam is positioned above the battery when reassembling the housing. Exercise care when reassembling the two halves of the housing, ensuri ng that internal wires do not interfere.

Mechanical setup

Loading shaft orientation

In order to accommodate a variety of testing requirements, the orientation of the loading shaft may be oriented in either of the two positions shown below. To change the loading shaft orientation, loosen the two captive screws on the back side of the housing, separate the two housing halves, rotate one half 180 degrees, and reassemble. Exercise care when reassembling the two halves of the housing, ensuring that internal wires do not interfere.

Mounting to a plate

Although the gauge may be used by hand, proper mounting is important if attached to a fixture or test stand. The round steel insert with a hole in the back of the housing is provided to withstand the load during a test. A mating dowel pin should be used (see illustration below). Mounting plates on Mark-10 test stands include a dowel pin and clearance holes for the four threaded holes located near the corners of the housing. An additional two holes are supplied for metric screws. These holes are designed to accommodate screws in order to hold the gauge in place (Mark-10 test stands include a set of thumb screws for gauge mounting). The screws must not be used for load bearing purposes. Failure to use a dowel pin properly can result in a hazardous situation.

Mounting attachments to the gauge

The force gauge’s threaded loading shaft is designed to accommodate common grips and attachments with female mounting holes. To mount a grip, gently thread it onto the shaft. Ensure that the grip or fixture is positioned to ensure axial load with respect to the loading shaft of the force gauge. When using a grip, ensure that it secures the sample in such a way that it is prevented from slipping out during a test, preventing a potential safety risk to the operator and others in the vicinity. If using a grip or fixture from a supplier other than Mark-10, ensure that it is constructed of suitably rugged materials and components.