az-instrument 8552 User manual

OPERATION MANUAL
PEN TYPE
ORP METER
Model: 8552, ORP Pen

INTRODUCTION
Congratulations on your purchase of
this pen type ORP meter. Please read the
manual completely before using this meter.
Filing and keeping the manual for future
reference. Recommended to soak the
electrode for at least 30 min. before using
to clear up the lazy effect or to make the
ORP electrode wet .
Features:
IP65 Waterproof
Big display
Data hold
Pen size
Low battery
Auto power off
LR44
housing.
for easy reading
to freeze readings.
,easytofitinpocket.
indicator.
.
Power by 4pcs batteries.
MATERIAL SUPPLIED
This package contains:
Themeterx1
LR44 button battery x 4
Operation manual
Color box or plain box
POWER SUPPLY
The meter is powered by 4 pcs LR44
batteries. To check the battery when:
1. First time use
2.
3.
1
The battery symbol appears on LCD
The meter can not power on

To install the batteries:
1. Turn off the meter.
2.
3. Replace the old batteries with four new
button cells LR44.
Loose the battery cover in counter-
clockwise direction. (DON'T discard the
black washer!)
4. Make sure the batteries are in place
and the polarity is correct.
5. Put back the battery cover & washer
and turn it tightly in clockwise direction.
1. Remove battery from instruments
that you do not plan to use for a
month or more. Do not leave battery
in instrument.
NOTE:
2

LCD DISPLAY
-The main display shows the measured ORP
reading.
-Hold=Data hold
8552
8552
KEYPAD
OPERATION
1. Remove the probe cover from meter
to expose the electrode out. It is
n ormal if you find white crystals are
present on the c ap or electrode
assembly.
3
HLD
mV

4
Remove the cover
from the bottom
of meter to expose
the electrode.
Electrode
2. Dip the electrode into the test solution.
Press " " to power on the meter
and tir it to get a stable reading.
8552
WARNING: For ORP meters, please
always make the sponge wet to
keep the electrode in a good
storage condition.

4. Press "" to freeze current readings.
The text "Hold" will appear on the LCD
. Press " " again to release the
hold mode.
5. Turn off the meter by pressing " "
button.
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5
6.Once finishing the measurement, clean
the electrode, put back the cap, store
the meter under the 0~50 C.
o
This meter will shut off automatically 20
minutes of inactivity. For operating longer
time, you can disable the sleep mode.
To disable the auto power off:
AUTO POWER OFF
(SLEEP FUNCTION)
Before power on,
pressing " " + ""
keys simultaneously until a
" " appeared on the screen
and then release keys to
return to normal mode.
n
Note: The disable sleep mode will be
invalid after every power off.
HLD

MAINTENANCE
Before using, remove the cover , then
soak electrode into distilled water
and rinse, and then take out and make
dry. Now the electrode is ready for use.
NOTE:
Do not rub sensing element forcibly
Preparation:
Rinse electrode with distilled water,
then set it in buffer solution of pH4.01
with saturated quinhydrone. After
stabilizing, record mV meter reading
(E2). The difference between E1 and
E2 should be 165mV.
Test the electrode:
t electrode in buffer solution of pH
7.00 with saturated quinhydrone. After
stirring, mV reading E1 should be
86±15mV.
Pu
()
K
which is
eep ORP electrode wet. If not use
for long period of time, it should be
rinsed and stored in the provided
soaking bottle filled with
soaking solution.
Rinse the electrode with distilled water
during the interval of each use.
Storage:
6

ORP electrode cleaning:
If sensing element got contaminated, it
will result in slow response and inaccu-
rate reading. Clean it as following:
If contamination is a mineral matter,
put sensing element in HCL solution
0.1N for 10 minutes and then rinse it
with distilled water.
If the contamination is oil or grease
coating, clean sensing element with
detergent and rinse with distilled water.
Power on but no display
TROUBLESHOOTING
1) Make sure the time of pressing
power key is > 0.3 second.
2) Check the battery are in place and
make good contact and correct
polarity.
3) Replace with new batteries and
try again.
4) Move away the batteries for one
minute and then put back again.
Out of ORP measuring range.
Check in normal condition first, if
remaining showing E02 or E03, the
electrode is out of order.
Slow response
Clean probe by immersing the electrode
in tap water for 10-15 minutes, then
rinse thoroughly with distilled water
or use a general purpose electrode
cleaner.
LCD display E02, E03
7

Operating Temp.: 0 ~60 C (32~140 F)
Operating Humidity: 0~80% RH
Battery Life: >200 hrs continuous use
oo o
SPECIFICATION
8
SPECIFICATIONS
8552
4mV
●
1mV
165mm(L)x35mm(W)x32mm(T)
-999 mV ~ +999mV
Accuracy +
Auto Power Off
Measurement range
Resolution
Hold Data
Waterproof (IP65)
Size
-
●
●
RETURN AUTHORIZATION
Authorization must be obtained from the
supplier before returning items for any
reason. When requiring a RA (Return
Authorization), please include data
regarding the reason, the
meters are to be returned along with
good packing to prevent any damage in
shipment and insured against possible
damage or loss .
defective
WARRANTY
The meter is warranted to be free from
defects in material and workmanship for
a period of one year from the date of
purchase. This warranty covers normal
operation but does not cover battery,
misuse, abuse, alteration, tampering,
neglect, improper maintenance, or
damage resulting from leaking batteries.
Proof of purchase is required for
warranty repairs . Warranty is void if the
meter used to be taken apart.

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Measuring / Testing Instruments !
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2014/06 Ver.1