AMALGAMATED INSTRUMENT RM4-IV, Operation And Instruction Manual

Page: 46 / 49

This table shows the effect of the output frequency of changing proportional gain
and bias with the following settings:
ctrI SPAN
=
20
,
A1.dc
=
1.0
,
A1.IG
=
0.000
A1.SP A1.PG A1.bS
Effect on relay operation
70 1.000 0.0
Reading of
50
or below - relay pulses at maximum frequency.
Reading of
50
to
70
- relay pulses with frequency decreasing as
value approaches
70
.
Reading
70
or above - relay permanently off.
70 1.000 100.0
Reading of
70
or below - relay pulses at maximum frequency.
Reading of
70
to
90
- relay pulses with frequency decreasing as
value approaches
90
.
Reading
90
or above - relay permanently off.
70 1.000 50.0
Reading of
60
or below - relay pulses at maximum frequency.
Reading of
60
to
80
- relay pulses with frequency decreasing as
value approaches
80
. (period increased by 50% at
70
compared
to minimum period e.g. if minimum period is 4 seconds the period
at
70
will be 6 seconds)
Reading
80
or above - relay permanently off.
70 0.500 50.0
Reading
50
or below - relay pulses at maximum frequency.
Reading
50
to
90
- relay pulses with frequency decreasing as
value approaches
90
. (period increased by 50% at
70
compared
to minimum period e.g. if minimum period is 4 seconds the period
at
70
will be 6 seconds)
Reading
90
or above - relay permanently off.
70 -1.000 50.0
Reading of
60
or below - relay permanently off.
Reading of
60
to
80
- relay pulses with frequency decreasing as
value approaches
80
. (period increased by 50% at
70
compared
to minimum period e.g. if minimum period is 4 seconds the period
at
70
will be 6 seconds)
Reading
80
or above - relay pulses at maximum frequency.
7.12 PI relay on duration
Display:
A
x.
dr
Range:
0.0
to
25.0
Default Value:
1.0
Displays and sets the control relay on duration from
0.0
to
25.0
seconds. If set to
0.0
the relay
will be disabled. The duration should be long enough to ensure that the device being controlled
receives an acceptable on pulse.
7.13 Setting up the PI frequency controller
1. Set the
A
x
OPEr
function to
A
x
Fr
.
2. Set the control setpoint
A
x.
SP
to the required setting.
46 of 49 RM4IVMAN-2.1-0