Spark SP22 User manual

SP22
Instruction Manual
Panel-Mounted pH
Indicators & Controllers
Dear Customer,
Thank you for choosing a Spark
Instruments product. Please read
this instruction manual carefully
before using these instruments.
This manual will provide you with
the necessary information for
correct use of these instruments.
MAJOR EXAMINATION
Remove the instrument from the
packing material and examine it
carefully to make sure that no
damage has occurred during
shipping. If there is any damage
and each meter is supplied with:
• Mounting brackets
• Instruction manual
•Two screwdriver for install and
calibration
GENERAL INFORMATION
SP22 is panel-mounted pH
indicators and controllers designed
for simplicity of use in a wide
range of industrial applications.
Connections and wiring to
electrode, power supply and
contacts are made via the terminal
blocks on the rear panel.
The meters are equipped with a
BNC socket and accept input from
any conventional pH electrodes.
Other features include: overtime
control system, selection of dosing
direction (Acid/Alk.), one dosing
contact, multi-color LED for
indicating if the meter is in
measurement/dosing/ alarm
condition, possibility to set (Off-
Auto-On switch) dosing action
mode SP22 powered at 220 Vac.
SPECIFICATIONS
Range
0.0 to 14.0 pH
Resolution
0.1 pH
Accuracy
Accuracy (@ 25 °C
/ 77 °F) ±0.2 pH
Calibration
Calibration
Manual, through
CAL (Offset) &
Slope tune trimmer
Dosing
Dosing Contact
Maximum 2A (fuse
protected), 250
Vac,
Dosing
Selection
Acid or Alk,
Contact Open=Acid
dosage=Relay ON
if Measure > Set
point
Contact Close=Alk
dosage=Relay ON
if Measure < Set
point
Set point
Set point
Adjustable, from 0
to 14 pH
Overtime
Overtime
Adjustable,
typically from 5 to
approx. 30 minutes
Power
Consumption
10 VA
Power
supply
External (fuse
protected), 220/230
Vac ; 50/60 Hz
Dimensions
93 x 100 x 79 mm
CALIBRATION
To achieve best measurement, we
recommend to calibrate the
instrument once every week.
And the procedure as following: -
with meter in measurement mode,
immerse electrode and Matching
Pin (if available) in pH 7.01 buffer
solution, shake briefly and wait for
reading to stabilize. Adjust the
CAL trimmer until “7.0” is
displayed on the LCD. And for
more accurate result use 4.01
buffer solution and Adjust the
Slope Tune trimmer until “4.0” is
displayed on the LCD.
ACCESSORIES
Calibration and Installation
screwdrivers
Mounted bracket
FEATURE DESCRIPTION
Front panel
1. Liquid Crystal Display
2. Switch for selecting dosing
mode:
• OFF = Dosing disabled
• Auto =Automatic dosage,
depending on set point
• ON = Dosing always active
3. RGB-LED indicator:
• Green = meter in
measurement mode
• Orange/Yellow = dosing in
progress
• Red, blinking = indicates an
alarm condition
4. CAL to adjust the pH offset
value during calibration
5. Slope Tune to adjust the pH
slope tune value during
calibration process
6. SET to adjust the set point
take value (0 to 14 pH)
7. SET Point indicator green led
flashing when set point switch
is pressed
8. Time Out indicator yellow led
flashing when dosing setting
over time dosing for
protection.
9. Measure key to set the
instrument to measurement
mode
10. SET Point key to display and
set the set point value

Rear panel
1. Trimmer for overtime setting
(typically from 5 to 30 min)
2. Jumper for enabling (jumper-
in) or disabling (jumper-
removed) the overtime control
3. Not Used contact
4. This contact acts as a switch
for driving the dosing system
(e.g. dosing pump)
5. Power supply terminal
6. Not Used contact
7. BNC plug for pH electrode
8. Connection for electrode
reference
9. Connection for potential
Matching Pin
10. Acid/Alkaline dosage selection
terminal:
•contact open = acid selection
•contact closed = alkaline
selection
11. Not Used contact
OPERATIONS
Overtime system: jumper (1) and
trimmer (2)
• This system allows the user to set
a maximum dosing period, by
adjusting the rear trimmer from 5
(min) to approx. 30 (max) minutes.
• When the set time is exceeded,
any dosing action stops, the LED
indicator on the front panel will
blink Red and the Yellow LED
indicator start blinking. To exit the
overtime condition, set the
OFF/Auto/ON switch to OFF
position, and then to Auto again.
For disabling the overtime feature,
simply remove the jumper from the
rear panel.
Note: The overtime system works
only if the OFF/Auto/ON switch is
in Auto position.
Terminals (7) and (8): Electrode
• Connect a pH-electrode to the
meter’s BNC plug (7).
• To benefit from the differential
input, connect the proper electrode
wire (if available) or a cable with a
potential matching pin (grounding
bar) to the relevant terminal (9)on
the rear panel.
Note: When the Matching Pin
cannot be immersed together with
the pH electrode in the solution,
disable the differential input by
shorting terminals (9) (Matching
Pin) and (8) (Electrode Reference)
with a jumper wire.
Terminals (10): Dosing selection
• For acid dosage, leave the circuit
open.
• For alkaline dosage, short the
terminals with a jumper wire.
Terminals (3) & (6) & (11): Not
Used
Terminals (5): Power Supply
• connect power supply with
220/230 V ac & 50,60 Hz
Terminals (4): Dosing Contact
• This contact drives the dosing
system according to the selected
set point and dosing direction:
• if “Acid” dosage is set, the relay
is ON and dosing activated if
measured value is higher than set
point;
• if “Alk” dosage is set, the relay is
ON and dosing activated if
measured value is lower than set
point.
OPERATING THE METER
Before proceeding make sure that:
• the meter is calibrated;
• the set point value has been
properly adjusted;
• all rear panel wiring and
selections are correct;
• the OFF/Auto/ON switch is in the
desired position.
Install or immerse the electrode in
the solution to be monitored, then
press the Measure key (if
necessary).
The LCD will show the pH value.
The LED indicator will light up
Green when the meter is in
measurement mode and
dosing is not active, while it will
light up Orange for signaling that a
dosing action is in progress.
SETPOINT
Press the SET Point key: the
display will show the default or
previously adjusted value and the
Green LED start blinking as
indication. Using a small
screwdriver as provided adjust the
SET trimmer until the desired set
point value is displayed.
After 1 minute the meter
automatically returns to the normal
mode; if not, press the Measure
key.
Warranty:
These instruments are guaranteed
for two years against defects in
workmanship and materials when
used for their intended purpose and
maintained according to
instructions.
Electrodes and probes are
guaranteed for six months. This
warranty is limited to repair or
replacement free of charge.
Damages due to accidents, misuse,
tampering or lack of prescribed
maintenance are not covered. If
service is required, contact the
dealer from whom you purchased
the instrument. If under warranty,
report the model number, date of
purchase, serial number and the
nature of the problem. If the repair
is not covered by the warranty, you
will be notified of the charges
incurred. When shipping any
instrument, make sure it is
properly packaged for complete
protection.