Tecnetics Industries Tecweigh 20, Operation Manual

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Additional explanations:
An AUTO ZERO must be done before an AUTO SPAN! If the Load Count Parameter
(Section 6.02.57) does not meet the criteria given, then the load cell(s) or LVDT(s) might be
damaged or there might be a problem with the signal conditioner. See Section 9.06 or 9.07 for
load cell or LVDT testing and replacement. Note: if an AUTO ZERO or AUTO SPAN is started
and then the belt is stopped, it will never complete the number of belt revolutions required. Press
RESET and start over if the belt has been stopped.
“AUTO ZERO (WAIT)”
or
“AUTO SPAN (WAIT)”
These messages indicate that an AUTO ZERO or AUTO SPAN calibration is in progress. An
AUTO ZERO or AUTO SPAN can be initiated manually, remotely through the serial port, or
automatically by the AZT Parameter (Section 6.02.10). It will perform according to the Zero
Revs Parameter (Section 6.02.12) and Span Revs Parameter (Section 6.02.13). The respective
message will remain viewable until the corresponding cycle is completed or until the RESET
button is pressed.
"FRAMING ERROR”
This message indicates a serial communications Parameter setting is incorrect when using the
serial communications function. Assure that all serial communications related Parameters are
correct for the system -- Station ID, Parity, Baud Rate, Command Menu, and Protocol (Sections
6.02.41-45).
Important: The plant remote equipment must also be operating with the exact
same serial communications settings (mutually compatible) for the system to operate
properly
.
“INTERLOCK OPEN”
Terminals T3 (DI1) and 10 (COM) is an interlock that must be electrically connected (closed) for
normal WP20 operation. This is easily accomplished by installing a jumper on the pins at J23,
which is located at the bottom center of the PCB. It can also be accomplished by installing a
jumper wire across terminals T3 & 10. If the interlock is not shorted, the RATE, TOTAL, and all
outputs are disabled. Verify that there is a jumper on J23 and also check the dedicated field
wiring diagram (normally at the end of the manual) to determine if remote equipment is
controlling the interlock circuit.
“LOAD ERROR”
WY15 and WY25 scales:
On WY15 (1 load cell) and WY25 (2 load cells) scales, this message indicates either a faulty
load cell signal, or the weight on the load cell(s) exceeds their capacity. Check the Load Count
Parameter (Section 6.02.57) and make sure the load counts increase when the calibration weight
is lowered.
Other possible causes of the message are:
•
The load cell(s) are installed with the arrow pointing up rather than down.
•
A load cell is incorrectly wired to the terminals. Refer to the load cell wire color code.
•
A load cell wire(s) is damaged or broken.
•
A loose terminal strip(s) or terminal screw(s).
•
A load cell is physically damaged.
•
A load cell has been overstressed and permanently damaged.
•
Material is jammed near the load cell.