Dynisco TX180, Installation And Operation Manual

Page: 35 / 52

TX180 Temperature Transmitter 35
bring up the
FAIL SAFE REPORTING
selection screen.
5.8 S
ELECT
F
AIL
S
AFE
R
EPORTING
The code 9500 indicates the main menu entry for setting the transmitter Fail Safe Reporting. Pressing
the
ENTER
key will bring up the following code.
The code 9501 corresponds to instructing the transmitter to output 3.6mA under a Fail Safe
condition. Pressing the
ENTER
key at this point sets the Fail Safe
LOW
. Pressing the
NEXT
key
brings up the following screen:
The code 9502 corresponds to instructing the transmitter to output 23.0mA under a Fail Safe
condition. Pressing the
ENTER
key at this point sets the Fail Safe
HIGH
. Pressing the
NEXT
key
brings up the following screen:
The code 9503 corresponds to instructing the transmitter to not report a Fail Safe condition. Pressing
the
ENTER
key at this point turns off this reporting. Pressing the
NEXT
key brings up the following
screen:
5.9 T
RIM
4.0
M
A
This allows trimming of the 4.00mA output current.
NOTE: The 4.00mA limit is factory calibrated to a precision standard. Using the Output Trim
function voids the NIST traceability of calibration. Do not arbitrarily trim the output unless a
qualified and accurate local standard is available to measure the adjusted 4.00mA output!
Also note that the 4.0mA limit should not be trimmed by more than about 50
␮
A, or
transmitter operation may be impaired.
If trimming the 4.00mA limit is still desired then press Enter. The transmitter will now output a
milliamp current equal to its internally set 4mA. This 4mA value should be read on an external
meter and compared to the plant standard. It is advisable to use a very good voltmeter to make these
comparisons. It is very possible that the transmitter will be more accurate than a great many
9501
9502
9503
9600