JF-1A Conductivity Sensor
A440-009
Page 54 of 56
FEBRUARY 2009
adjustment has not resulted in “significant errors of the
low end.
12)
To test this value we need only to set conductivity to
our desired full-scale value by sending “Temp=0” (the
new selected value of TRL) to the JF-1 unit.
13)
Read the Digital Voltage Meter output that should be
connected across either the 250 or 100-ohm sense
resistor. The voltage should equal 1.00 +/- 0.01 volt
for the 250-ohm resistor, or 0.40 +/- 0.005 volts for the
100-ohm sense. If this is not attained TDA0 needs to
adjusted, increase the value of TDA0 if the voltage is
low, increase the value if the voltage is low. TDAO is
set using the TDAO=XXX, where XXX is the new
entry. Repeat these unit the correct voltage (current is
attained).
14)
Full scale can then again be checked using the entry
again of the full-scale values, when complete unit is
ready.
15)
Store the values in the internal EEPROM using the
“***E” command. The when complete will respond
with a carriage return.
16)
Return the unit to RUN MODE using the “***R”
command.
Section 5.0 Temperature Current Loop Calibration directly to PLC
readout of Temperature:
Equipment Required:
s)
JF-1 Serial Test Cable FSI P/N B440-079
t)
Serial Data Communicating Device, set for operation at 9600
baud, 1 stop, 8 data, No parity
u)
PLC Connected to JF-1A Current Output with ability of the
operator to read the value directly in pS/M from the PLC.
Procedure: