Cooper Instruments & Systems WTM 502 Wire Tension Meter - Manual (Page 7)

2.31 Top Level Softkeys
Zero Press this softkey to zero the force display. You would usually press this at the beginning of a
series of tension tests but would not need to do it for every test unless there is some zero
drift.
Clear
Press this softkey and you are prompted to clear the Peak reading or the Average. Make your
choice by pressing the appropriate softkey and that value is cleared from memory.
Mode Press
the Mode key to scroll through the five display modes. These are explained below:
Live Tension Mode: The display shows the live tension.
Dual Peak Mode: The display shows the live tension on the top display and the peak force
achieved on the bottom display. To clear the peak remove any force on the WTM 502, press
the Clear softkey and follow the prompts.
Average Capture Mode: This mode shows the live tension in the top display and the average
of all captured readings on the bottom display. To capture a reading and add it to the
average, press the Avg softkey when a force is applied to the WTM 502. Follow the prompts
to add (or not) the reading to the average.
Temperature Mode: This mode shows the live tension in the tip display and the current
temperature in the bottom display. Also shown is whether the reading is in Fahrenheit or
Centigrade and if the temp is one that was Entrd (entered) manually.
You can enter the temperature in one of two ways; let the WTM 502 determine the ambient
temperature automatically or key in a temperature manually. Instructions for entering the
temperature are under the Temp softkey description.
Upper and
lower
thresholds
are set in the
Configuration
WIRE menu.
Check-tensioning Mode: Check-tensioning mode permits quick & easy graphical view of the
applied tension versus the desired tension. This mode works well when you are repeatedly
tensioning to the same tension range. This mode displays a bar graph representation of the
tension being applied. See Figure 5. The black bar represents the range of the wire, from
zero to ultimate wire rating. The wide white band is the tolerance window based on upper and
lower thresholds you can enter. The live force is represented by the arrow and the white line
on the black bar. When the force gets within ±5% of the acceptance window, a close-up of
the acceptance window is displayed. See bottom example in Figure 6.
The WTM 502 has automatic tension targeting with temperature. Points may be entered from
a linear Tension-Temperature supplied table for a wire cable. If entered, the check-tensioning
window will automatically float according to the active temperature (manual or automatic).
Use the bottom and top entries from the table. Patent is pending on this feature.
Display when tension is below the dotted, target box.
Display when tension falls within the dotted, target box.
FIGURE 6. CHECK-TENSION DISPLAY
CF 142 5 V 08/09/05