Suntex PC-300A Series, Руководство по эксплуатации, Страница: 26 / 36

4.
SLOPE knob: pH electrode slope adjustment knob, usually at pH4.00 or pH10.00 (invalid
for ORP measurement)
Note: When STDBY sign or pH sign is twinkling, it is valid to turn SLOPE knob. It is invalid
besides that in case that measuring values may be adjusted at random.
5.
:
Under measurement mode, a short press is to select Hi/Lo set point control; while, an
extended press is to enter analog output setting and RELAY test. Measuring value and
analog output will remain what they were prior to HOLD status, and it ceases RELAY
control.
(1) Release it after a short press to enter Hi/Lo set point control. How to press: pH
→
H1
→
L1
→
pH/mV (It shows Hi & Lo indicators.)
Enter H1: Hi set point control. It shows H1 twinkling on display and H1 set point can be set up by
adjusting Hi knob to make a test for Hi indicator. Press MODE (Note 1) to store H1 set point
value and then enter L1 set point control. It shows L1 twinkling on display and L1 set point can be
set up by adjusting Lo knob to make a test for Lo indicator. Press MODE (Note 1) to store L1 set
point value and then go back to measurement mode with RELAY, analog output on.
(2) An extended press until it shows 4mA on display to enter analog output setting and RELAY
test. How to press: pH/mV
→
4mA
→
20mA
→
H1(on)
→
H1(off)
→
L1(on)
→
L1(off)
→
pH/mV
Enter 4mA (analog output of 4mA), it shows 4mA on display. Press MODE to enter 20mA (analog
output of 20mA) and it shows 20mA on display. Press MODE to enter H1(on): H1 RELAY test, it
turns on H1 RELAY action and Hi indicator with on & H1 showing on display. Press MODE to
enter H1(off) to turn off H1 RELAY action and Hi indicator with off & H1 showing on display.
Press MODE to enter L1(on): L1 RELAY test, it turns on L1 RELAY action and Lo indicator with
on & L1 showing on display. Press MODE to enter L1(off) to turn off L1 RELAY action and Lo
indicator with on & L1 showing on display. Press MODE to return measurement mode with
RELAY, analog output on.
Note 1:
It is available to see Hi/Lo set point value after entering Hi/Lo set point control. It will go
back to measurement mode in 2 minutes with previous setting about set point control if
without any operation.
Note 2:
If a sign " " and set point value are shown in turn on display, it means that Hi or
Lo knob has reached mechanical boundary or set point has been out of set range. Turn the
knob in a reverse way to its original position and resume control point setting.
Note 3:
After entering analog output setting and RELAY test, it will automatically return
measurement mode in 2 minutes if without any operation.
6.
Hi, Lo Knob:
Hi/Lo set point control knob
Note:
It is valid to turn Hi or Lo knob only when H1 or L1 is twinkling on display. It is invalid
besides that in case that RELAY may be adjusted at random.
7.
Hi, Lo indicator:
RELAY indicator of Hi/Lo set point control
Note:
Hi set point is used to add acids or reductants, while Lo set point is used to add alkaline or
oxidants.
8.
Display:
Large LCD display that shows main measurement & function indication status(MODE)
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