2
Short-term accuracy includes nonlinearity and noise uncertainties. It does not include drift or calibration
uncertainties.
8.3
Operation
Using the 2561 HTPRT Module with the 1560
Black Stack
is very simple. The
following sections explain the steps for setting up and using the 2561 to mea-
sure with HTPRTs. For instructions for installing the 2561 HTPRT Module
onto the 1560 see Section 4.1.
8.3.1
Connecting a Probe
The 2561 HTPRT Module has ten terminal posts, five each for the two channels
(see Figure 14). The red terminals connect to one side of the sensor. One
sources current and the other senses the voltage. The black terminals connect to
the other side of the sensor. One sources current and the other senses the volt-
age. The green terminal connects to ground and can be used to ground a shield
wire. Two probes can be connected to the 2561 at once.
To connect two-wire probes to one channel, connect one wire to both red termi-
nals and the other wire to both black terminals. If there is a shield or guard wire
connect it to the green terminal.
To connect four-wire probes to one channel, connect the wires from one com-
mon pair (wires that are shorted together at the sensor element) to the red ter-
minals and the wires from the other pair to the black terminals. If there is a
shield or guard wire connect it to the green terminal.
1560 Thermometer Readout
User’s Guide
120
HTPRT
MODULE
2561
Figure 14
Sensor Wiring Diagram
