Allpossible configurations are shown in Figure 3 on page 16.
6.4.1 Connecting a PRT or Thermistor Probe
PRTand thermistor probes are attached to the resistance input module via Hart
Scientificmini-DWF connectors. These patented connectors accept bare wire,
spade, or mini banana plug terminations.The connectors are color coded for
ease in connecting lead-wires.
When using 2- and 3-wire sensors, theaccuracy of the 1529 is reduced as
stated in thespecifications. Compensation is made for 3-wire PRTs, but the dif-
ference in lead resistance affectsthe measurement accuracy. The 1529 ther-
mometer readout isunable to compensate for 2-wire lead resistance.
Attachthe lead-wires of the probes as shown in Figure 5 on page 22. The top
termainalssense current and the bottom terminals sense potential.
6.4.2 Connecting a Thermocouple
The 1529 thermocouple input module accepts both standard and sub-miniature
size thermocoupleconnectors. The connection is made with the positive termi-
nal on the rightand thenegative terminal on the left. You must use a connector
that matches the thermocouple typefor the internal RJCto be accurate. Forex-
ample, if you are using a type K thermocoupleyou must also use a typeK con-
nector,which is made from the same type of metal. For best results, wait two
minutesbefore measuring after inserting the thermocouple connector into the
inputmodule.
21
6 General Operation
Probe Input Modules
Figure4 Thermocouple Connections