Model 574 Programmable Counting System (PCS)
78 - GSE Scale Systems
value of the calibration weight and prompt you by
displaying CAL OK? At this point, the accuracy of the
calibration can be checked by weight without leaving the
Calibration Mode.
If the calibration was accurate, press <ENTER>.
The system will prompt you to save the new calibration
plus any other changes that were made. Press
<ENTER> to save and then <ENTER> to exit.
If the calibration is not accurate, press <CLR>.
The system will return to the New Zero? prompt.
Proceed as described in step 3 of this section.
NOTE:
If the calibration weight was less than 5% of capacity or
if there was a large change in the calibration, the system
will prompt you with the message ReCal Req'd. Press
<ENTER> and you will be returned to step 3 of this
procedure, or press <CLR> to obtain the CAL OK?
prompt as described above and override the re-calibration
requirement. However, we recommend you perform a re-
calibration in order to avoid any serious inaccuracy.
b) "Last Zero?":
Re-Cal (with cal weight already applied)
This capability allows a re-calibration to be performed
without removing the applied weight, if, during a
calibration check, the calibration is found to be out of
tolerance. This is especially beneficial when the 574 is
used with large capacity applications such as tank
weighing (remote platforms).
This operation is achieved by pressing the <ENTER>
key at the "Last Zero?" prompt during the calibration
procedure.
The scenario where this feature would be used is as
follows:
a) A scale is to be checked for compliance with
local weights and measures regulations.
b) The 574 is zeroed with a press of the <ZERO>
key.
c) The necessary load is applied to verify
accuracy.
d) The weight indication is found to be out of
tolerance.
e) The calibration mode is accessed, either using
the method described above for Quick Cal or by
the normal method. Note that the calibration
weight is still applied!
f) At the "Last Zero?" prompt, the <ENTER> key
is pressed.
g) The instrument briefly displays the message:
"Using Last0", followed by the usual: "Units =
xx" indicating the proper units for the keying
in of the calibration weight. The 574 is
using the zero established with the last use of
the <ZERO> key during the weigh mode as the
new calibration zero.
h) Next the display prompts: "Keyin CalWt".
i) The operator keys in the currently applied
weight, such as 50000 <ENTER>. The
574 then adjusts the calibration parameters to
bring the system into calibration.
j) Next the display prompts "Cal OK?". The
weight may then be removed and if necessary
re-applied to assure the inspector that the
calibration has properly adjusted.
k) Once the inspector is satisfied with the
calibration press the <ENTER> key to save the
calibration.
l) Next the usual prompt "Save Mods?" followed
shortly by "Enter = Save" is displayed. Press
<ENTER> to save the new calibration factors.
m) The next prompt, "Enter = Exit" is similarly
responded to by the <ENTER> key and the
574 returns to the weigh mode.
c) "Temp Zero?":
Re-Cal (without establishing new zero)
In some applications it is desirable to perform a
calibration without removing the currently applied load.
This is particularly useful in tank weighing applications
where it might be a particularly time consuming and
costly ordeal to completely drain the tank being weighed.
Pressing the <ENTER> key at the "Temp Zero?" prompt
during the calibration procedure causes the 574 to
temporarily zero the displayed weight so that additional
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