Thermo Fisher Scientific Alpha pH 1000 - Manual (Page 24)

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1) Follow directions in 7.4.1 to enter Controller mode.
2) Press the ENTER key. Scroll until the lower display shows
“rEL” and the upper display shows the current selection (de-
energised = dEEN or energised = EN).
3) Press the
▲ or ▼ key to choose de-energised or energised
relay state.
4) Press the ENTER key to confirm your selection.
5) Proceed to 7.4.4 step 3, or return to Measurement mode by
pressing the
▲ and ▼ keys simultaneously (escape).
7.4.4
Selecting proportional range value Xp
Note: If the controller type “oFF” or “L.Ct” is set, the parameters listed in 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. Scroll until the upper display shows
the proportional range (a number from 10 to 200%), and the
lower display shows “PrP”.
3) Press the
▲ or ▼ key to choose the proportional range
value Xp.
4) Press the ENTER key to confirm your selection.
5) Proceed to 7.4.5 step 3, 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” or “L.Ct” is set, the parameters listed in 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”.
- 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.
- 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.
SETUP
HOLD
SETUP
HOLD
100
SETUP
HOLD
10.0
SETUP
HOLD
60
SETUP
HOLD
F.Pf