Checkline MST - Manual (Page 17)

17
To calibrate the zero point:
- Press the MEM key.
As long as the MEM key is depressed,
the DISPLAY shows a random decimal
value between 500 and 1200 e.g.
800
cN
.
This decimal value may vary from
instrument to instrument.
Write down the decimal value.
- Release the MEM key when the value
shown on the DISPLAY is fairly stable
(the reading might fluctuate greatly).
The display 2 shows
E - 10
cN
.
1st calibration point:
- Hang a weight which corresponds to
10% of the tension range from the
measured material, vertically, as
shown in fig. 3.6.
- Clamp the process material in the rub-
ber groove of the motor-driven DELIV-
ERY ROLLER and thread it through the MEASURING ROLLERS.
The correct material path is indicated by the red material path symbol on the front of the
tension meter.
a) Press the MEM key.
As long as the MEM key is depressed, the DISPLAY shows a decimal value which is
higher by approx. 200 than the first decimal value, e.g.
1000
cN
.
This decimal value may vary from instrument to instrument.
Write down the decimal value.
- Release the MEM key when the value shown on the DISPLAY is stable (the reading
might fluctuate greatly).
The DISPLAY shows
E - 50
cN
.
If the display shows
E - 10
cN
again, the value was not accepted.
Check the suspended weight and the material path between the MEASURING
ROLLERS and repeat the procedure from step a.
2nd calibration point:
- Hang a weight which corresponds to 50% of the tension range from the measured
material, vertically, as shown in fig. 3.6.
- Clamp the process material in the rubber groove of the motor-driven DELIVERY
ROLLER and thread it through the MEASURING ROLLERS.
The correct material path is indicated by the red material path symbol on the front of the
tension meter.
MEASURING
ROLLERS
DELIVERY ROLLER
Weight fig 3.6
3.7 Calibration of the MST (Cont.)