HAKARU PLUS CORPORATION Tel. 81-6-6300-2195
Page 6
05/12/16 TFL-B101Q DS (FL6)
Note:
To calibrate the bargraph you must be able to input two input signals. Usually the mini-
mum input (LO Input) and the maximum input (HI Input) signals are used for optimum accuracy.
However a scaling can be accomplished with any two signals that are higher or lower than each
other by more than 5% of fullscale and are not greater than +2.1VDC or less than -1.05VDC.
STEP C SET THE LOW INPUT SIGNAL READING ON THE BAR
1) Apply the LO input signal (4 mA in this example) to the input pins.
2) Using the ZERO button adjust the bar down to the required position.
STEP D SET THE HIGH INPUT SIGNAL READING ON THE BAR
1) Apply the high input signal (20mA in this example) to the input pins.
Using the SPAN button adjust the bar to the required position.
This position could be higher or lower than the position adjusted in
Step 2. The scaling for an input of 4 to 20mA is now complete.
Apply 4 mA
to the
Input Pins
and adjust
bar display
to the required
position
100
0
SP1 SP2 SP3 SP4
Zero Span
Apply 20 mA
to the
Input Pins
and adjust
bar display
to the required
position
100
0
SP1 SP2 SP3 SP4
Zero Span
STEP A SELECT THE CENTER ZERO DISPLAY MODE FOR CH1
1) Following the instructions on page 4, remove the meter from the case.
2) Select the Center Zero Mode for CH1 by repositioning the jumper clip on the
Center Zero Display Mode Select Header.
STEP B REVIEW THE INPUT MODULE STATUS
1) See pages 15 – 21 for information on input modules that may be use with this meter.
2) Only the IDP4 Universal Input module can be used for dual inputs and information
on this module can be found on page 15.
3) 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 C RESET THE SCALING ON CHANNEL ONE
1) Apply power to the meter and press the CH1 ZERO and CH1 SPAN buttons
simultaneously for 2 seconds. This erases any previously memorized scalings,
and resets the scaling 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.
The procedure for scaling the bar graph for bipolar signals is very simple. If say CH1 has to be scaled for -1V to +1V, the steps
are as follows:
CH1
CH2
CH1, Center
Zero Mode
Selected
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.
Standard Display Mode Calibration Procedure Continued
One Point Quickset Rescaling and Calibration Procedure
Center Zero Mode Scaling For Bipolar Inputs
ONE POINT RECALIBRATION
As explained earlier, the TFL-B101Q bargraph is calibrated using two point calibration. Once a bargraph is calibrated, the
low end of the range may be then recalibrated without affecting the calibration of the high end, and
vice versa.
For example, take an TFL-B101Q that has been calibrated to read zero to full scale for an input of 4 to
20mA. If now the scaling has to be changed to read zero to full scale for an input of 0 to 20mA, only
the low (4 mA) end needs to be recalibrated. The high (20 mA) end of the scaling is left untouched,
and so does not change. The following one point recalibration procedure is used for this purpose.
STEP A RECALIBRATE THE LOW INPUT SIGNAL READING ON THE BAR
1) Apply the LO input signal (0 mA in this example) to the input pins.
The first segment will flash, indicating an under range condition.
2) Using the ZERO button adjust the bar up to the required position.
3) The TFL-B101Q has now been recalibrated to read zero to fullscale
for a 0 to 20 mA input.
Apply 0 mA
to the Input Pins
and adjust
bar display
to the required
position
100
0
SP1 SP2 SP3 SP4
Zero Span
