11. Set Temperature
System
Power ON
Press and hold (3 sec.)
Press 3 x
Temperature system will flash
10. Set Date and Time
Power ON
Select Date/Time type first (see 9.)
Press and hold (3 sec.)
Press 2 x
Time will flash
Confirm
Select minutes
To increase
To decrease
Save and change to hours
To increase
To decrease
Save and change to Year
To increase
To decrease
Save and change to Day/Month
To increase
To decrease
Save and exit
Replacement of batteries
pH Buffer
Article No.
72 12 50 pH buffer-set, each 90 ml (25°C)
4.00/7.00/10.00
72 12 52 pH buffer 4.00 (25°C)
1 litre
72 12 54 pH buffer 7.00 (25°C)
1 litre
72 12 56 pH buffer 10.00 (25°C)
1 litre
51 56 00 buffer tablets pH 10
100 pc.
51 56 01 buffer tablets pH 10
250 pc.
51 56 10 buffer tablets pH 7
100 pc.
51 56 11 buffer tablets pH 7
250 pc.
51 56 20 buffer tablets pH 4
100 pc.
51 56 21 buffer tablets pH 4
250 pc.
Warranty
The waterproof SD 50 is warranted to be free
from manufacturing defects for 2 years and
electrode (probe) module for 6 months.
Error Code and Actions
Description
Range Action
Electrode not installed
Thermistor:
Install or replace
or faulty
0.5~100 k
Ω
electrode
pH out of range
0~14 pH
Use new solution
or replace electrode
Electrode is not touching the
Immerse electrode
sample solution
into solution
Temperature out of
0~60 °C
Bring solution to the
range
temperature within range
Offset out of range
-60~60 mV
Use new buffer or
replace electrode
Slope out of range
85%~115%,
Use new buffer or
50~68 (mV/pH)
replace electrode
mV out of range
-1800~1800 mV
Use new solution
SD 50 pH Specifications/
Features
1 Operating range: 0-60 °C, 0-14 pH,
-1800 mV to +1800 mV
2 pH resolution 0.01 pH. accuracy
± 0,05 pH
3 Selectable buffer system (pH 7.00 or
pH 6.86): 1-, 2- or 3-point-calibration
with auto-recognition
4 Automatic Temperature compensation
5 mV resolution 0.1 mV within
±1000 mV and 1 mV over
±1000 mV, accuracy ±20 mV
6 Temperature resolution and accuracy
0.1 °C, selectable °C or °F
7 Time and date display with 25 sets of
data storage (non-volatile)
8 22x22 mm LCD display, with backlight
9 2 x CR 2032 batteries
10 Battery life > 25 hr (continuous use,
backlight OFF), low battery indicator on
LCD display
11 Auto-power off to save battery-life
(8 minutes non-use)
Instruction manuals available in further languages, visit www.lovibond.com • Printed in Germany 11/13
Storage of electrode
The sponge in the protective cap should be
moistened with tap water.
Store electrodes dry when instrument is not
being used for longer periods.
Moisten electrode in tap water for some hours
before initial use and after dormant periods.
1
2
3
4
5
6
Replacement of electrode
new electrode
Confirm
Select Temperature style (°F/°C)
Save and exit
Accessories
19 50 017 Battery CR 2032 (2 Batteries
required)
19 48 20 pH replacement electrode
38 48 01 Beaker, 100 ml
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