Contrec 515, Operation Manual

Page: 49 / 92

Instrument Calibration
515 HC04 - 8 June 2007 41
The minimum pulse factor required is determined by:
For example: To calculate the required pulse factor to avoid losing counts
in retransmission if a total counts at a maximum rate of 75 units/sec (Hz) and
the required pulse width of a remote counter is at least 50ms:
The maximum pulse output frequency is:
The minimum pulse factor for that frequency is:
Alarms
The alarm relay(s) can be assigned to rate variables such as temperature, or
set as an equipment failure alarm.
The alarm switches “on” whenever an alarm condition exists. The alarm
switches “off” when the alarm condition no longer exists. However, you
may need to configure external alarm devices that require acknowledgement
for cancelling an alarm.
Equipment Failure Alarm
Any alarm relay can be assigned as an equipment failure alarm. This alarm
setting can have normally closed (open) contacts that open (close) when the
instrument displays any error message as listed in
Error Messages on page
50, or if there is a loss of power to the instrument.
max rate of total
max pulse output frequency
------------------------------------------------------------------
1000
2 50
×
---------------
10Hz =
75
10
------
7.5Hz =
↓ →
UNITS PARAMS INPUTS OUTPUTS
ALARMS
COMMS TM/LOG SETUP TEST END
RELAY ALRM
n
Select a rate variable to assign to the alarm relay.
Note: If the alarm type is set to “equipment alarm”, this relay assignment
setting is ignored.
Press or to select the variable that is required as an alarm.
SET