Rice Lake Tracer AV - Manual (Page 28)

24 Tracer AV Installation Manual
6. With WVAL displayed, press Zero to show
t h e st o r e d c a l i b r a t i o n w e i g h t . U s e t h e
procedure shown in Figure 3-3 12 to enter the
actual value of the test weights to be used for
the span calibration. Press
Zero again to
store the entered WVAL value and go to span
calibration ( WSPAN ).
7. With WSPAN displayed, place test weights on
the scale and press Zero to calibrate span.
The indicator displays *CAL* while calibration
is in progress. When complete, the A/D count
for the span calibration is displayed. Press
Zero again to store the span calibration
value.
4.2 Standard Calibration
To calibrate the Tracer AV using the Zero and Units
keys, do the following:
1. Place the Tracer AV in setup mode
To enter setup mode, remove the setup switch
access screw on the
Tracer AV (See Figure 2-3
4). Once the screw is removed, use a small
screwdriver or pen tip to press the setup
switch. The display changes to show the word
DEFCAL .
2. Remove all weight from the scale platform.
If your test weights require hooks or other
items, place them on the scale for zero
calibration.
3. Press the Units key until the display reads
CALIBR (see Figure 4-1). Press the Zero key
to go to zero calibration ( WZERO ).
4. With WZERO displayed, press Zero to
calibrate zero. The indicator displays *CAL*
while calibration is in progress. When
c o m p l e t e , t h e A / D c o u n t f o r t h e z e r o
calibration is displayed. DO NOT adjust this
value after WSPAN has been set! Press
Zero
again to save the zero calibration value and go
to the next prompt (
WVAL ).
5. With WVAL displayed, press Zero to show
t h e st o r e d c a l i b r a t i o n w e i g h t . U s e t h e
procedure shown in Figure 3-3 12 to enter the
actual value of the test weights to be used for
the span calibration. Press
Zero again to
store the entered WVAL value and go to span
calibration ( WSPAN ).
6. With WSPAN displayed, place test weights on
the scale and press Zero to calibrate span.
The indicator displays *CAL* while calibration
is in progress. When complete, the A/D count
for the span calibration is displayed. Press
Zero again to store the span calibration
value and go to the next prompt ( REZERO ).
7. The rezero function is used to remove a
calibration offset when hooks or other items
are used to hang the test weights.
• If no other apparatus was used to hang the
test weights during calibration, remove
the test weights and press
Units to
return to the CALIBR menu.
• If hooks or other items were used during
calibration, remove these and the test
weights from the scale. With all weight
removed, press
Zero to rezero the scale.
This function adjusts the zero and span
calibration values. The indicator displays
*CAL* while the zero and span calibrations
are adjusted. When complete, the adjusted
A/D count for the zero calibration is
displayed. Press
Zero to save the value,
t h e n p r e s s U n i t s t o r e t u r n t o t h e
CALIBR menu.
8. Press Units until the display reads CONFIG ,
and the display will exit the setup mode.
4.3 EDP Command Calibration
To calibrate the Tracer AV using EDP commands, the
EDP port must be connected to a terminal or personal
computer. See Section 2.3.3 on page 7 for EDP port
pin assignments; see Section 5.0 on page 26 for more
information about using EDP commands.
Once the Tracer AV is connected to the sending device,
do the following:
1. Place the Tracer AV in setup mode (display
reads CONFIG ) and remove all weight from the
scale platform. If your test weights require
hooks or other items, place them on the scale
for zero calibration.
2. Send the WZERO EDP command to calibrate
zero. The indicator displays *CAL* while
calibration is in progress.
3. Place test weights on the scale and use the
WVAL command to enter the test weight
value in the following format:
WVAL=nnnnnn<CR>
4. Send the WSPAN EDP command to calibrate
span. The indicator displays *CAL* while
calibration is in progress.
5. To remove an offset value, clear all weight
from the scale, including hooks or other items
used to hang test weights, then send the
REZERO EDP command. The indicator
displays
* C A L * while the zero and span
calibrations are adjusted.
6. Send the KUPARROW EDP command to exit
setup mode.