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•
Rain water increases the weight after the scale weighs it and before the truck is
weighed.
•
There are incorrect or invalid Parameter settings (Chapter 6).
•
There was material on the belt during calibration.
•
The belt speed was not calibrated properly (Section 7.03).
•
A material test was not performed (Section 7.04).
•
Electrical interference is causing a false speed or load signal.
The Parameter values cannot be edited…
After a power line voltage spike or a lightening strike nearby, the Parameter values can get
scrambled/corrupted. An indication of this happening is when one of the digits of a Parameter
cannot be changed. This kind of damage is not field repairable. Contact the
Tecweigh
Service
Department (Section 2.01) for assistance.
Resetting the PCB…
If after trying other troubleshooting techniques, the equipment still does not perform up to
expectations, press the reset button
on the MP400 PCB
. The reset button is a small white button
at the upper right corner of the PCB. Also refer to Section 9.02 for a picture of its location. This
will check for corrupt data and also recover Parameters from memory if necessary. If this has no
effect, try disconnecting the power completely and after a short time delay reconnecting it.
9.04 Auxiliary
Outputs
Troubleshooting
Bench Test Mode…
All of the WP20 auxiliary outputs can be tested for proper operation using the Bench Test Mode.
While in Run Mode, press and hold both the UP and DOWN arrows for five seconds to enter the
Bench Test Mode. Press both the UP and DOWN arrows momentarily to exit the Bench Test
Mode. In Bench Test Mode, the following items are held constant:
1) The RATE is set to 1000.
2) The SPEED is set to 376.
3) The TOTAL is calculated from the RATE.
4) The Relays close and open every three seconds.
5) The RATE current loop is set to 20 mA.
6) The HFR output is set to 10,000 Hz.
7) The RATE polarity (POL) output goes high every three seconds.
8) Pressing each display button will give a description of its function.
Relay failure…
For each relay on the MP400 printed circuit board (PCB), a green LED also exists. When a relay
is energized, its LED will illuminate, and should illuminate whether a load is connected to the
relay or not. The relays will also make a clicking sound as they are energized and de-energized.
If a relay is found to be non-functional per the above, replace the PCB. The relays are not field
replaceable. Contact the
Tecweigh
Service or Parts Department (Section 2.01) for assistance.
If the relays seem to work properly in Simulation mode, but do not work during normal
operation, consider how realistic the relay Parameters settings are. Common errors are described
as follows:
Содержание Tecweigh 20
Страница 2: ... 1 ...
Страница 10: ... 9 2 09 I O Quick Reference Guide ...
Страница 20: ... 19 ...
Страница 24: ... 23 4 03 WY15 and WY25 Scale Wiring load cells ...
Страница 25: ... 24 4 04 HY15 and HY25 Field Wiring ...
Страница 26: ... 25 4 05 WY10 WY10HD and WY20 Scale Wiring LVDTs ...
Страница 27: ... 26 4 06 Chart Recorder Data Logger using the 4 20 ma output ...
Страница 28: ... 27 4 07 Chart Recorder Data Logger using the HFR output ...
Страница 29: ... 28 4 08 Remote Rate Total Display 4 09 Remote Tons Counter ...
Страница 30: ... 29 4 10 Radio Transceivers Local Scale Remote Processor ...
Страница 31: ... 30 4 11 Radio Transceivers Local Processor Remote PLC PC or Remote Display ...
Страница 32: ... 31 4 12 Radio Transceivers Local DC Generator Remote Processor ...
Страница 33: ... 32 4 13 Radio Transceivers Local DC Generator and Processor ...
Страница 34: ... 33 4 14 Multiple Processors to Tecweigh Multi Scale Display MSD ...
Страница 35: ... 34 4 15 Interposing Relay External 120 vac Power 4 16 Interposing Relay Internal 30 vdc Power ...
Страница 61: ... 60 SC300 PCB WY15 and WY25 SC400 PCB WY10 and WY20 ...
Страница 71: ... 70 10 01 WY10 Dimensions CHAPTER 10 DIMENSIONS ...
Страница 72: ... 71 10 02 WY10 HD Heavy Duty Dimensions ...
Страница 73: ... 72 10 03 WY15 Dimensions ...
Страница 74: ... 73 10 04 WY20 Dimensions ...
Страница 75: ... 74 10 05 WY25 Dimensions ...
Страница 76: ... 75 10 06 HY15 and 25 Dimensions ...