Yokogawa DR240 - Manual (Page 150)

10-8 IM DR231-01E
10.3 Select Alarm Interval/Hysteresis/Hold/A/D Converter Integration Time/Filter
Selection of Interval for High Limit of Rate-Of-Change Alarm (ALARM RH TIME)
Set the number of measurement repeats in “Interval = measurement interval x measurement
repeats.”
• Select 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15.
• The default setting is 8.
Selection of Interval for Low Limit of Rate-Of-Change Alarm (ALARM RL TIME)
• The same selection method as the above.
Selection of Alarm Hysteresis (ALARM HYS)
Applied to high/low limit alarm.
• Select 0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9 or 1.0%.
• The default setting is 0.5%.
Selection of Alarm Display Hold (ALARM HOLD)
Select whether the alarm display is held or not when the alarm is reset.
• OFF: hold
• ON: not hold
• The default setting is OFF.
Selection of A/D Converter Integration Time (A/D INTG)
Select the A/D converter integration time. Select it from the following:
• AUTO: the frequency of 50/60 Hz is automatically switched corresponding to the power
frequency of this instrument. However, AUTO does not function when using DC power
supply. Selecting AUTO will set the A/D integration time to 50 Hz (20 ms).
• 50 Hz: the integration time is set to 20 ms (50 Hz).
• 60 Hz: the integration time is set to 16.7 ms (60 Hz).
• 100 ms: the integration time is set to 100 ms (10 Hz)
• The default setting is AUTO. If the model is a DR130/DR231 with /P6 option or a DR241 with
-2 power supply voltage specification, it is set to a default value of 50 Hz (20 ms). If you are
using the instrument on a 60-Hz power supply, change the A/D integration time to 60 Hz (16.7
ms).
Selection of Filter (FILTER)
Select whether the input filter is operated or not. Select it from the following:
• OFF: Not operated
• ON: Operated
• The default setting is OFF.
Note
• In order to make the set or selected contents effective, the contents must be registered. For details, see
page 10-24.
• To return from the SET UP menu to the operation display mode, select END in the main menu. For
details, see page 10-24.