4
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12913-00 / 0222
5.7 Possible sources of error.
1. If the electrode membrane is not mounted tightly,
measuring solution enters the inside of the electrode
and falsifies the measured values. Replace the
conductive liquid as described in 5.2.
2. Sediments settle on the electrode membrane and
block the membrane's function. Replace the memb-
rane and ensure careful cleaning and storage.
3. The service life of an ammonia electrode is approx.
1 year, regardless of use or storage. Older elec-
trodes may have an adverse effect on measure-
ments. Therefore, replace the electrode after ap-
prox. 1 year.
5.8 Replacing the battery
Remove the battery
Open the sensor by turning the screw
cap on the back of the sensor counter-
clockwise, e.g. with a coin.
Fig. 8
Lever the battery sensitively,
e.g. with the help of a small
screwdriver or a small pair of
scissors, out of its socket. In-
sert the screwdriver as shown
in Fig. 9.
Fig. 9
Insert new battery
Slide the battery under the golden metal nose (Fig.10-1).
Make sure that the battery is completely under the metal
nose and completely pushed to the upper edge.
Push the battery into the socket
by pressing lightly on the oppo-
site side.
The battery slips under the two
plastic lugs (Fig. 10-2), which is
also noticed by a short "click".
Fig. 10
Before closing, make sure that
the seal in the lid is not bent and
lies neatly on the edge of the lid.
Then tighten the cover clock-
wise.
Fig. 11
6 TECHNICAL DATA
Operating temperature range: 5 - 40°C
Relative humidity < 80%.
Measuring range
Resolution
Accuracy*
0.
9… 1800 mg/l
0.5 mg/l
±10%
Max. data transfer rate
Battery type
Max. wireless range (open field)
Dimensions (WxHxD)
10 Hz
CR2032
30 m
90 x 44 x 23 mm
Weight (incl. electrode)
*After calibration
97 g
7 SCOPE OF DELIVERY
The scope of delivery includes:
•
Cobra SMARTsense Ammonium Ion
12913-00
•
Ammonium Ion-selective electrode PNH
3
-2-004
•
Instruction manual
8 ACCESSORIES
The following accessories are available:
•
Button cell CR2032, 3 V
07922-15
•
Cobra SMARTlink
12999-99
•
Ammonium Ion-selective electrode
PNH
3
-2-004
12913-10
•
Free measureApp available from supplier portals
iOS
Android
Windows
9 CONFORMITY
2
1
PHYWE Systeme GmbH & Co.KG hereby
declares that the radio system type 12913-
00 complies with the 2014/53/EU directive.
The complete text of the EC Declaration of
Conformity is available at the following In-
ternet address:
www.phywe.com/en/ec-declaration
