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additional time (in seconds) for which the unit will wait to receive a pulse, before setting the
calculated frequency to zero. This setting is independent of the update time. The wait time
can be user set anywhere between 1s and 20s. If the wait time is set to 0, the unit will not
wait beyond the configured update time.
Alarm Outputs
The 2000T MK3 has two configurable alarm outputs. Both outputs are NPN (switch to 0V on
activation), with a maximum voltage of 60Vdc and sink current of 150mA.
When configured as a high alarm (HI), the alarm will be activated when the scaled frequency
(for the active mode) is greater than, or equal to, the programmed value.
When configured as a low alarm (LO), the alarm is activated when the scaled frequency (for
the active mode) is less than, or equal to, the programmed value.
The alarm outputs automatically reset when the value shown on the scaled frequency no
longer meets the selected criteria.
If specified at time of ordering (type "L"), a 2000T can be supplied with a latching facility for
the alarm outputs. Resetting the outputs is then performed by grounding the reset terminal
(RST) on the rear panel or reset via the front panel.
Mode Selection
The 2000T tachometer will operate in any one of four modes, each of which has
independent settings. The four modes are:
1. Frequency A
(FREQ
A)
2. Frequency B
(FREQ
B)
3. Ratio Frequency A / Frequency B (A/B)
4. Ratio Frequency B / Frequency A (B/A)
It is possible to configure any or all of these modes. If more than one mode has been
configured, the user can switch between these modes at any time. In order to do so, either
momentarily connect the mode terminal "M" to 0V, or switch the mode via the front panel
as described below. It is recommended to install a momentary push switch for this purpose,
if mode changes will be required. In order for a mode to be selectable, its scaling factor must
be set to a non-zero value in the settings menu. The mode switch will then change between
all configured modes in the above order.
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