LABEC M-TIT-5 - Manual (Page 47)

mV manual titration when titrate the parameter by manual, if the burette is 10ml, set pre-added
volume to "10ml"; if the burette is 20 ml, set pre-added volume to "20 ml" (ensures that end
volume is larger than pre-added volume), refer to diag.64
Diag.64 Parameter setting in Manual Titration
Manual Titration/Parameter setting
When setting finished, press ‘Start Titration’ button, meter will push the burette full of distilled
water into the weighing bottle, then weigh it with balance. Calculate the burette coefficient
according to following formula:
0
1 2
*V
d
g g
f


×100％
In which: f= burette coefficient
g
1
= weight of empty weighing bottle
g
2
= weight of weighing bottle for adding solution
d= density of water
V
0
= volume of burette full scale
V. MAINTENANCE AND SERVICE OF THE METER
1. Maintenance
 Keep the sockets of the meter clean and dry, keep them away from acidity, alkaline, salt
solution, and also keep them damp-proof to ensure insulation and high input impedance
performance of the meter. When the meter is not working, insert Q9 short circuit plug into the
socket of measuring electrode to prevent it from dust and steam. On the occasion that is with
higher humidity, dry the plug of the electrode with clean gauze first.
 Often clean the whole burette with distilled water, especially the titrant which produces
sediment or crystal (eg. AgNO
3
), clean the burette in time after it is used.
 When using perchloric acid Acetic acid as the titrant, keep the ambient temperature ≥16℃,
otherwise it will produce crystal, and damage the valve.
2.Settle the common trouble: See Table 1
MV Titration pH Titration
Pre-adding volume: 10mL
Next adding: 0.2mL
Jump Value Set
mV/pH Titration
First end point
Jump value: Large Middle Small
Value : 100
Ending volume: 40mL
Resume Set Stir Start Titration
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