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HFR failure…
The High Frequency RATE (HFR) output transmits a square wave signal at a frequency equal to
10 times the calculated RATE. The HFR output requires no calibration, however it does have its
own damping factor (Section 6.02.24), as does the RATE display (Section 6.02.15), and the
RATE analog output (Section 6.02.19). If these three damping factors are equal, then these three
RATE values will be the same, however, if they are not equal, the three RATE values might not
necessarily agree, they will lead or lag each other. When using serial communications (Section
8), Command Menu item 6, Average Rate, will also be included in this lead/lag scenario. Also
refer to Section 4.01, “HFR output”, for additional HFR information.
If the HFR output continues to be non-functional, replace the PCB. Contact the
Tecweigh
Service or Parts Departments (Section 2.01) for assistance.
Other problems…
The outputs could become disabled or not operate as expected, 1) when the T3 Interlock is open
(Section 4.01, “Remote Interlock), 2) during an Auto Zero or Auto Span, or, 3) while the unit is
in Program Mode. If everything is correct and the system is operating normally, but a remote
device is not, consult the supplier of that device, otherwise, contact the
Tecweigh
Service
Department (Section 2.01) for assistance.
9.05
Load Cell Testing / Replacement
The following explains how to test a load cell(s). First stop the conveyor and disconnect power
from the WP20. Then disconnect the green connector from the SC300 signal conditioner (SC)
that the load cell wires are connected to. If more than one load cell is connected to the green
connector, to get at accurate reading, the wires of the load cell to be tested will have to be
removed from the connector. Next, using an ohmmeter, verify the following resistance values. If
even one resistance value varies by more than +/- 10%, replace the load cell.
Model
CI-LC22
SB1 or LC
CB6-XX-T
SP4 CI42
Red-Black
310 Ohms
350 Ohms
400 Ohms
Red-Green
290 Ohms
280 Ohms
290 Ohms
Red-White
360 Ohms
280 Ohms
290 Ohms
Black-White
290 Ohms
280 Ohms
290 Ohms
Black-Green
390 Ohms
280 Ohms
290 Ohms
Green-White
290 Ohms
350 Ohms
350 Ohms
If it is necessary to replace a load cell, be sure to re-assemble the new load cell exactly the same
way it was disassembled. Take special note of the swivel washers. The contoured faces of these
washers fit together and the flat faces are on top and bottom. The safety latch is only used during
transportation and installation. It should not be in place during normal use. Refer to the
following figure.
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 ...