OHAUS STARTER 300, Instruction Manual, Page: 12 / 15

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4.3 Set manual temperature compensation
After confirming the temperature unit, the MTC temperature appears on the display. Then use up
or down buttons to increase or decrease the value to the temperature of your sample. Press
Read to confirm the setting. Press Exit to leave to setup. The default setting is 25 °C(77
°
F).
Note:
°
C = 5/9 (
°
F -32)
4.4 Selecting a predefined buffer group
After confirming the compensation temperature value, it goes to the buffer group selection. Use
up or down buttons to select a buffer group(3.1.1). Press Read to confirm the setting. Press Exit
to leave to setup. The default buffer group is b1 .
b1 1.68 4.01 7.00 10.01 (at 25°C)
5 Maintenance
5.1 Error message
Error 0 Memory access error Reset to factory settings
Error 1 Self-diagnosis failed Repeat the self-diagnosis procedure and make
sure that you finish pressing all five keys within
two minutes.
Error 2 Measured values out of range Check if the electrode is properly connected and
placed in the sample solution.
Error 3 Measured buffer temperature
out of range (5 ... 40 °C) Keep the standard buffer temperature within the
range for calibration
Error 4 Offset out of range Make sure the buffer is correct and fresh; Clean
or replace the pH electrode.
Error 5 Slope out of range Make sure the buffer is correct and fresh; Clean
or replace the pH electrode.
Error 6 Meter cannot recognize the
buffer Make sure the buffer is correct and fresh; check if
the buffer has not been used more than once.
Error 9 The current data set has
already been stored once A measurement can only be stored once. Perform
a new measurement to store a new data set.
5.2 Meter maintenance
Never unscrew the two halves of the housing!
The STARTER 300 series instruments do not require any maintenance other than occasional wipe
with a damp cloth and the replacement of depleted batteries.
The housing is made of acrylonitrile butadiene styrene (ABS). This material is attacked by some
organic solvents, such as toluene, xylene and methyl ethyl ketone (MEK). Any spillage should be
immediately wiped off.
5.3 Electrode maintenance
Make sure the electrode is filled with electrolyte solution. Always store the electrode according to
the manufacturer
’s instructions and do not allow it to dry out.
If the electrode response becomes sluggish or the slope is not good enough, try:
1. Soak the electrode in 0.1M HCl overnight
2. For fat or oil build-up, degrease the membrane with cotton wool soaked in either acetone or a
soap solution