TB 9-6685-331-50
b. Connect a four terminal 100Ω standard resistor to probe No. 1 using the interface
connection device. Be careful to ensure the excitor and sense leads are properly wired.
NOTE
Throughout this procedure probe 1 will often be referred to
as channel 1, probe 2 as channel 2, etc.
c. Press the Ohm and READ PROBE 1 (or NEXT PROBE) keys on the TI to read
the measured resistance.
with the actual value (test report value) of the resistance standard. If the two readings
are within +50 ppm (+005Ω) of each other, no further calibration is required for RTD
input channel 1. If the readings are not within the specified tolerance, the channel will
require recalibration.
e. Repeat steps b through d for channel and probe No. 2. Repeat for channels 3 and
4, only if they are to be used. Disconnect the 100Ω resistor.
several preliminary system set-ups must be performed
a. The precision display of the probe has to be established.
b. The probe must be configured to read the raw analog-to-digital (a/d) counts.
c. Temporary mantissa values of 1.0 and zero (0) must be substituted for the
existing values of M and B before new mantissa values can be calculated and re-
programmed into the TI.
CAUTION
Each paragraph of performance checks involves pressing a
series of keys that are prompted by the TI. It is important
that the test sequence be kept in the order as written. If the
wrong key is inadvertently pressed, abort the test segment
and start over. This can be done by pressing EXIT and YES
keys.
