ETH-messtehnik GMV2-K, Руководство по эксплуатации

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ETH-messtechnik gmbh D-74415 Gschwend P.O. 16
Nr.: 162e Operating Instructions GMV2-K revised: 09.05.2019 Rev.: 0
Subject to change without prior notice
18
6.6 Display illumination
Menu path:
Menu-> Output-> Display-> Light
LCD lighting is turned on and off by pressing the "Light" key.
Note:
• In standby mode, display illumination is switched off after a set period if no keys are pressed (see Sec. 3.13). Press a
key (Test, Return, ...) to switch illumination back on again.
6.7 Contrast of display
Menu path:
Menu-> Output-> Display-> Contrast
Use the“+” and “-” keys to set the contrast. If the contrast is too high, the background will be dark; if the contrast is too
low, the figures will be pale.
Note:
• The contrast should only be changed for extreme ambient temperatures
7 Measuring modes
7.1 Tracking measurements
Appropriate for continuous display of static or very slowly changing torques and angles.
To read the values, the tracking measurements must be slow. The display follows fast changes in torque with a delay,
which depends on the filter setting, see the next section.
Notes:
• Speed measurement and power measurement can be activated here if angle measurement has been de-activated.
• The switch-off function is not available here!
• An adjustable filter can also be programmed (0.1 to 10 s).
• If switched on, the optional angle counting function is permanently enabled. It is reset when the transducer is
zeroadjusted.
7.2 Filter
Menu path: “Menu -> Param -> Param set -> New -> Program”
In the laboratory, very often the torque and the speed do not remain constant during a revolution
–
this makes it difficult to
read the display. This filter is based on the moving average and it can filter out these fluctuations. The range of the time
period over which the measured values are averaged can be set between 0.1 s and 10 s. This time period applies to the
torque, the speed and thus to the power measurement. Filtering is optimized by selecting the filter time according to the
following formula and by making it as big as possible:
Filter time[s] = n * 60 / speed[min
-1
]; n = 1, 2, ....
Example:
For a speed of 30 rev/min, select a time between 2.0 s and 10.0 s.
Note:
Please keep in mind that double the filter time must elapse before the final value appears on the display.
7.3 Outputting measured values continuously
Menu path: “Menu -> Param -> Param set -> New -> Program”
Tracking measurements can be continuously printed out or saved. The allowed interval time ranges from 0.5 s to 900 s
(15 min). Typically, the maximum output rate is determined by the printer speed.