HAKARU PLUS CORPORATION Tel. 81-6-6300-2195
05/12/16 TFL-B101Q DS (FL6)
Page 5
Meters with
QUICKSET PROGRAMMING
feature a unique, easy-to-use, two point scaling and calibration system.
Scaling or calibration is accomplished simply, by applying a zero or low input signal and adjusting the bar to the
desired reading, using the ZERO button. A higher input signal is then applied, and the bar is adjusted to the desired
reading for that input value, using the SPAN button.
IMPORTANT DETAILS THAT MAKE QUICKSET PROGRAMMING EASY TO USE AND UNDERSTAND
1. The zero and span buttons are functionally the same, except as follows: The ZERO button can initiate a scaling
with input signals from zero to 95% of fullscale.The Span button can initiate a scaling with input signals from 5%
of fullscale to 105% of fullscale.
2. When a Zero or Span button is pressed, the Up or Down indicator LED will immediately light up to show the
direction, in which the Bar will move, after a 0.5 second delay. If the button is released and pressed again, the
opposite Up or Down indicator will light up, and 0.5 seconds later the Bar will begin to move in that direction until
the button is released. When the bar is being adjusted to zero or fullscale, the bar will automatically stop at the
zero or fullscale position, and will not overshoot these positions, even if the button continues to be pressed.
3. While the bar is being adjusted, a new offset and scale factor is continuously being calculated. At the moment the
button is released, and the scaling is accepted, the calculation data is memorized and implemented. The Scaling cal-
culation is based on the new position of the Bar, the input signal being applied at that moment, and the previously
memorized position of the Bar and the input signal that was being applied, when the other button was last released.
4. Positive and negative signals maybe integrated into a two point scaling. However when either a ZERO or SPAN
button is pressed the input signal being applied, must be more than 5% higher or lower than the previously mem-
orized value of the input signal, that was being applied when the other button was last released. If not, the bar
will flash, the scaling will not be accepted, and the previous scaling will still be retained in memory.
5. Because of the requirement, that a new scaling input signal must be 5% higher or lower than the previously stored
value, it can sometimes be difficult to implement a desired scaling, particularly when using a calibrator that only
has fixed output values. In this case Reset the Scaling by pressing the ZERO and SPAN buttons simultaneously
for two seconds. Both scaling memories will be erased and an internal default scale factor will be loaded. This
provides a display of zero to fullscale on the bar for an input of approximately 0 to 100% of the range selected
on the input signal conditioning module. After Resetting the Scaling a new calibration, using either button, can
be implemented with new input signal values. It is good practice to always use the Zero button for lower input
signals and the Span button for higher input signals, even when the bar display scale is inversed.
6. The larger the difference between two points used for calibration, the better the accuracy. However if the differ-
ence is too high, and the output from the input signal conditioning module is greater than +2.1VDC, or less than
-1.05VDC, the bar will flash over range. The calibration will not then be accepted and, the previous scaling will
still be retained in memory. In this case, either a lower input signal must be used, or a higher range on the input
module should be selected to recalibrate the meter.
Note:
Most input signal conditioners have provisions for analog calibration and scaling. If the meter’s scale factor
is set to read zero with a zero input (shorted input), and to read 10 Bars fullscale with a 2.000 V input, any pre-cali-
brated signal conditioner with an output that does not exceed – 1 V to + 2 V, will read correctly in the meter without
any further calibration.
STEP A REVIEW THE INPUT MODULE STATUS
1) See pages 12 – 15 for information on input modules that may be used
with this meter.
2) Confirm that the correct range and input is selected on the input signal
conditioning module.
Note:
When undertaking an initial set up and primary scaling and calibration of the
meter it is best to start with a reset of the scaling.
STEP B RESET THE SCALING
1)Apply power to the meter and press the ZERO and SPAN buttons simultaneously
for 2 seconds. This erases any previously memorized scalings, and resets the scal-
ing to the factory default, of approximately zero to full scale, for an input, that is 0 to
100% of the range selected on the input signal conditioner.
Standard or Center Zero Display Mode
may be selected, depending on the Operating Mode selected.
If the standard display mode is not already selected open the meter case as showing on page 4 and
move the jumper clips on the display mode select header to the OFF position.
Standard Display with
Jumper Clips in OFF
position
Two Point Quickset Scaling and Calibration
Standard Display Mode Calibration Procedure
CH1
CH2
100
0
SP1 SP2 SP3 SP4
Zero Span
Reset the scaling
to the default value
on by pressing
the Zero and
Span buttons
simultaneously
for 2 secs.
