Thermo Scientific LevelPRO, User Manual

Page: 70 / 128

Operation
Physical Inputs & Outputs

Clear Hold – The Hold/Live field will be set to Live mode when the
alarm assigned to the relay is active, and it will remain in Live mode once
the alarm becomes inactive.
b. If Totalizer is selected from the Process Function dropdown, the Total
Selection dropdown allows the user to select a totalizer.
i.
If no totalizer is selected from the Total Selection dropdown, the relay
remains at its default state.
ii. When a totalizer is selected from the Total Selection dropdown, the
indicated totalizer associated with the detector designated in the Detector
ID field will drive the relay.
4. Enter a pulse width value in the Pulse Width (30-200ms) field.
a.
Entering 0 will generate no relay pulse output.
b. A value of 30 – 200 bases the relay pulse output on pulse width at 10 ms
intervals.
Note: If the process function is set to Totalizer, the relays will operate at a
maximum frequency with a period of twice the pulse width.
The detector outputs totalizer pulses on a relay as long as there are pulses
available from the selected totalizer – even when the relay pulses accumulate at
a faster rate than they can be output.
5. Selecting No from the Invert Output dropdown maintains the output of the relay
in its normal state. Selecting Yes from the dropdown will invert the output of the
relay.
6. Additional fields on this screen, which are listed below, are for display purposes
only and are not configurable by the user.
•
Present Value – This field displays the current live status (On or Off) of the
relay.
•
Status – This field displays Live or Hold, depending on the selected
operational mode.
4
-
30 LevelPRO User Manual Thermo Scientific