LABEC M-TIT-5 User Manual
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7.2.6 Pre-control Value Switch and Value Parameter
Pre-control value parameter is set for controlling titration time, it will influence the titration
speed and analysis time of preset end point titration directly. Generally it is no need for user to
set it but only need to tacit admit the system setting. If user finds titration is too slow and
analysis time is too long, titration is too fast or does not enter into slowest status when it closes
to end point, you can switch on pre-control value switch and reset the amount of pre-control
value (when pre-control value is switched off, meter use tacit parameter). Set pre-control value
large, titration speed fast, vice versa. The adjust range of pre-control value is 30 – 90%.
After setting all above parameter correctly, press ‘Start titration’ button to start Preset End
Point Titration. Also when set above parameter, user can set stirrer speed or calibrating
electrode slope.
7.3 Mode of Titration
Mode titration is for a particular titration and its end point is known; or it is a special mode
generated by user when you are satisfy with the result after pre-titration for convenience of next
reusing. Meter provides two specific mode of titration:
a. HC1 → NaOH (0.1mol/L)
B. K
2
Cr
2
O
7
→ Fe
2+
(0.1mol/L)
The rest mode of titration is to be generated with pre-titration by users. Users will get titration
parameter after pre-titration, press ‘Mode’ button in menu, select ‘Generation of mode’ and then
store this parameter in the meter to generate user’s own titration mode. Titration can be done
later only if this mode is down loaded (see 8.1.2 ‘Generation of mode’ in detail). In starting
status, press ‘Titration’ button, select ‘Mode of Titration’ to enter into ‘Mode of Titration Mode’.
Displayed as follows:
Select Mode 01/02
01
HC1 →
NaOH(0.1)
02
K2Cr207 →
Fe2+(0.1)
PgDn
PgUp
Mode HC1 → NaOH (0.1)
pH titration
Number of end point: 1
2003/06/15 00:00:00
First end point
Sample volume
10.0mL
End point:
7.00Ph
Time delay:
10s
Titrant
Concentration
End point switch:
ON
0.1000
Saves Delete Titration Stir Calibration
Diag.34 Mode titration select mode
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