Thermo Fisher Scientific Alpha pH 2000 - Manual (Page 34)

10. Setting the proportional range: press the
▲ or ▼ key to set the
proportional range (setting range: 10 to 500%). Press the ENT key to
confirm your setting.
11. Setting the pulse frequency: press the
▲ or ▼ key to set the pulse
frequency (setting range: 60 to 120 pulses per minute). Press the ENT
key to confirm your setting.
12. Setting the integral action time: press the
▲ or ▼ key to set the
integral action time (setting range: 0.0 to 999.9 minutes). Press the ENT
key to confirm your setting.
Note: If the integral action time is set to ‘0.0’, then the unit functions as a
‘P’ Controller.
Continue with Setup mode procedures, or return to Measurement mode by
pressing the
▲ and ▼ keys simultaneously (escape).
6.6 Current Output 1 sub-function
In this sub-function you set the current output range of the transmitter for pH
or mV values.
2
2
3
3
4
4
5
5
SETUP
HOLD
PH
SETUP
HOLD
PH
SETUP
HOLD
PH
SETUP
HOLD
PH
SETUP
HOLD
PH
SETUP
HOLD
SETUP
HOLD
PH
SETUP
HOLD
1
cur.1
SETUP
HOLD ENT
ENT ENT ENT
ENT
ENT ENT
ENT
1. Select the “CUR.1” sub-function, then press the ENT key.
2. Selecting the output type: press the
▲ or ▼ key to select the desired
output type: 0-20 mA or 4-20 mA. Press the ENT key to confirm your
selection.
3. Setting the pH or ORP value at which the transmitter output will be 4
mA (or 0 mA): press the ▲ or ▼ key to set the pH or ORP value to be
equivalent to 4 mA or 0 mA, respectively. Press the ENT key to confirm
your setting.
4. Setting the pH or ORP value at which the transmitter output will be 20
mA: press the ▲ or ▼ key to set the pH or ORP value to be equivalent to
20 mA. Press the ENT key to confirm your setting.
5. Selecting out of range current: Press the
▲ or ▼ key to switch “CU22”
on or off. If “CU22” is on, the output signal will jump to 22 mA when the
measured pH and ORP value is below or above the values set in points 3
& 4 above. Press the ENT key to confirm your setting.
Note: the “CU22” setting (on/off) of current output 1 applies to current
output 2 as well.
Continue with Setup mode procedures, or return to Measurement mode by
pressing the
▲ and ▼keys simultaneously (escape).