User Calibration; Adjustable Head - JENCONS DIGITRATE Notice D'emploi

User calibration

The user is allowed to override Factory Calibration and custom calibrate the Digitrate or Digitrate Pro.
The procedure is as follows:
1 Establish a mean volume of 10 dispensings of nominal volume of distilled H
the 50ml unit), and establish the mean value gravimetrically. After each filling, remember to reset the display (18) to
00.00, only after you have compensated for any backlash.
2 When the mean volume, taking into account the correction factor (see formula below), has been established, turn the
titrate wheels so that nominal volume is displayed i.e. 30ml for the 30ml unit, 50ml for the 50ml unit.
3 With the instrument turned on, press the calibration switch (17) through the right hand pen hole.
4 The LCD will flash 'CAL'.
5 Use the 'ON' button (15) as '–' and the 'Reset' button (18) as '+' to set the calculated mean volume on the display. Push
once for increment of '1' – continuous push runs the numbers faster.
6 Store the new value by pressing the 'MODE' button (16). The word 'CAL' appears on the display from now on in order
to indicate that the unit has been calibrated by the user.
Calculation ( for the nominal volume)
Mean value
x
n = number of weighings
Mean volume
Z = correction factor ( eg. 1.0029 µl /mg at 20°C, 1013 hPa)
Calculate the dispensed volume by taking the temperature into account
(1 ml distilled water at 20°C = 0.997g)
Factory calibration figures, however, are retained in the memory at all times.
To return to the factory calibration
1 Press the calibration button through the pen hole twice.
2 The display cancels the word 'CAL' and the unit is returned to the factory calibration.

Adjustable head

The display unit head (2) can rotate on the threaded platform base and be adjusted to suit the user.
Adjust the orientation of the display head (2) to the desired position, only when the Digitrate barrel is empty. Loosen the
threaded ring (4) of the platform base by a quarter turn and rotate the display head (2) to the desired angle by holding the
threaded base (10) of the Digitrate with one hand, while the other hand rotates the polypropylene protection sleeve (3).
When the angle of the display is in its desired position, retighten the threaded ring.
Never rotate the display by holding on to the 'electronic display head casing'.
6
∑ x
i
x = n
= results of the weighings
i
V = x * Z
Operator Instructions
0 at 20°C (30ml for the 30ml unit, 50ml for
2