FloBoss 107 Instruction Manual
7-14
Troubleshooting
Revised June-2017
Caution
Failure to exercise proper electrostatic discharge precautions, such
as wearing a grounded wrist strap may reset the processor or
damage electronic components, resulting in interrupted operations.
1.
Connect to ROCLINK 800.
2.
Select
Configure
>
I/O
>
AI Points
.
3.
Select the correct RTD analog input point number.
4.
If the RTD opens, ROCLINK 800 indicates point fail by going
outside the calibrated A/D value 0% and 100% values. In fault mode,
the input value is either the last known good value or is set to a preset
value, as defined by the AI point configuration.
5.
Disconnect the RTD and connect a jumper between the – and GND
RTD terminals and between the SRC and + of the RTD module.
6.
Connect either an accurate resistor or decade resistance box with a
value to give a low end reading across ter and –. Refer to
Table 7-2
, which provides a temperature-to-resistance conversation
chart.
Table 7-2. Temperature-to-Resistance Conversions
84
–40
C
–40
F
100
0
C
32
F
150
130
C
267
F
200
267
C
512
F
250
408
C
767
F
Note
:
These values are approximations only.
Do not
use these values to
calibrate the device.
7.
Verify that the Raw A/D Input value changed and reflects the
Adjusted A/D 0% value.
8.
Change the resistance to reflect a high temperature as determined by
the temperature-to-resistance conversion chart.
9.
Verify that the Raw A/D Input value changed and reflects the
Adjusted A/D 100% value.
10.
Measure between one red wire and one white wire with an ohm meter.
The value should be between 100
and 125
at room temperature.
11.
Remove the test equipment.
12.
Reconnect the field device.
