Checkline WTTM-GEN1 - Manual (Page 6)

– 6 –
LL00- -BBAATT
PPEEAAKK
LLbbff
00..00 0000
1
3
4
2
– 15 –
Recalibration Procedure
For recalibration, you would need a solid and vibration-free rack and a test weight
(50kg or 100kg), preferably Class M1, which complies with the international
standard.
Before calibrating the load cells, the pull force fixture must be brought back to the
zero-position. In order to do this, adjust the selector switch for the pull speed to “0”
and switch on the instrument.
1. Switch off the instrument using ON/OFF button.
2. Press and hold MODE, PEAK and RESET buttons simultaneously.
3. While keeping the above buttons pressed, press the ON/OFF button until CAL is
indicated in the display and the calibration weight code (??) is shown. Then
release all buttons. The WTTM is now in calibration mode
4. Press the MODE button. The signs SNC and –00– flash for approx. 10 seconds
followed by the indication ZER 88888.
5. To confirm the calibration of the zero point press the RESET button. The
indication SCN 88888 flashes on the display for approx. 15 seconds, followed by
PEK 88888. The first step of the calibration is now complete.
6. Hang the calibration weight on the terminal adapter. When the weight hangs
perpendicular and still, you may save the full-scale value.
7. Press the PEAK button. The display flashes for approx. 15 sec. with the sign
SCN 88888 followed by the sign END 88888. After a further period of approx.
5 sec., the sign OK 88888 indicates that the calibration was successful. The
instrument switches off automatically.
8. Should the calibration fail, the display will show ERR 88888 instead. The original
calibration datas are still saved in the memory. You may remove the weight and
repeat the recalibration procedure
CAL
–00–
“oK”
88888
“SCN”
–00–
ZER
88888
➔
“SCN”
88888
PEK
88888
➔
“SCN”
88888
“End”
88888
➔ ➔
1 Low Battery Indicator. Flashes when batteries need charging, turns off
when fully charged. Remains on while charging.
2 Peak Mode Indicator. Shown on display when configured for peak mode
(stores highest peak force until it is reset by pressing zero key)
3 Units Indicator. Displays currently selected units of measure (pounds,
newtons or kilograms). Changed by pressing UNITS key.
4 Force Value. Displays current or peak force value in user-selected units of
measure.
5.3 Operating modes
The WTTM can be set to operate in one of two distinct operating modes: Peak
Capture or Average. In Peak Capture Mode, the system measures the force at a
frequency of 1000 Hz (1000 times per second) and displays the highest force
measurement. The peak value remains on the display until a higher force value
is measured or until the user presses the ZERO key.
In Average Measurement Mode, the system measures the force at a frequency
of 1000 Hz (1000 times per second) and displays the average each time the dis-
play is updated. The factory default display update rate is 3 times per second (1
time every
1/3 second).
Note: Refer to section 7.3, page 8, for additional information and to change the
update rate.
5.2 Display