Thermo Fisher Scientific Alpha COND 1000 - Manual (Page 28)

Operating Instructions Thermo Scientific Alpha COND 1000
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7.4.4
Selecting Proportional Range Value, Xp
Note: If the controller type “oFF” is set, the parameters listed in 7.4.3, 7.4.4, and
7.4.5 are blanked out.
This mode lets you set a band as a percentage of its full scale value. You can select
this range from 10 to 200%, and the lower display shows “PrP”.
1) Follow directions in 7.4.1 to enter Controller mode.
2) Press the ENTER key. Follow directions in 7.4.2 and
select either “PLC” (pulse length control) or “PFC”
(pulse frequency control). Press ENTER key.
3) Press the ENTER key until the upper display shows the
proportional range (a number from 10 to 200%), and the
lower display shows “PrP”.
4) Press the ▲ or ▼ keys to choose the proportional range value Xp.
5) Press the ENTER key to confirm your selection.
6) Proceed to 7.4.5, or return to Measurement mode by pressing the ▲ and ▼
keys simultaneously (escape).
7.4.5
Maximum Pulse Length (tPL) or Maximum Frequency (FPF)
Note: If the controller type “oFF” is set, the parameters listed in 7.4.3, 7.4.4, and
7.4.5 are blanked out.
This mode lets you set the maximum pulse length or the
maximum frequency at which the relay will operate.
1) Follow directions in 7.4.1 to enter Controller mode.
2) Press the ENTER key. Scroll until the lower display
shows “t.PL” or “F.PF”.
a. In PLC (pulse length) mode: The lower display
shows “t.PL” to indicate pulse length. The upper
display shows your current pulse length. You
can select any value from 0.5 to 20 seconds.
b. In PFC (pulse frequency) mode: The lower
display shows “F.PF” to indicate pulse
frequency. The upper display shows your
current maximum pulse rate. You can select any value from 60 to 120
pulses per minute. When the measured value exceeds the Proportional
Band in 7.4.4, the controller will pulse the relay at this rate.
3) Press the ▲ or ▼ key to choose the period duration or maximum frequency,
depending on your mode.
4) Press the ENTER key to confirm your selection and to return to Advanced Set-
up mode, or return to Measurement mode by pressing the ▲ and ▼ keys
simultaneously (escape).
Note: The alarm contact is always of the fail-safe type. In the event of power failure
the alarm is triggered.
HOLD SETUP
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.pl
f.pf
HOLD
HOLD
SETUP
SETUP
10.0
60