Product Manual

7526A
Users Manual
2-10
4. Push  to select the necessary thermocouple type or the millivolt range.
5.
Connect the UUT to the thermocouple terminals of the Product with a standard TC
miniplug as shown in Figure 2-5. One pin is wider than the other. Do not push the
plug into the incorrect polarization. The TC wire used for the connection must agree
with the thermocouple type selected for correct cold junction compensation. It is
necessary for the miniplug and terminals to stabilize to the same temperature. They
are stable in approximately 3 minutes.
CURRENT
OUTPUT
HI
VOLTS
mA
RTD/
OUTPUT
HI
LO
HI
LO
LO
TC
SENSE
INPUT/OUTPUT
4 W RTD/
INPUT
100 V PK
MAX
100V MAX
100mA MAX
20V PK
MAX
20V PK
MAX
PRECISION PROCESS CALIBRATOR
7526A
Unit Under Test (UUT)
Thermocouple Output
+
-
gwp014.eps
Figure 2-5. Thermocouple Input Connection
6.
Push

and

to toggle the thermocouple display between °F
and °C.
7.
Push

and

to toggle the cold junction compensation between
the internal
temperature sensor and an external reference.
8. For best accuracy, it is recommended to zero the TC millivolt circuit daily, or if the
Product is used out of its ambient temperature range of 18 °C to 28 °C. The
maximum offset from unit calibration that can be zeroed out is ±1 mV.
To zero the TC millivolt circuit:
1. Select the thermocouple measure function and push  until the millivolt range is
selected.
2. Put the supplied thermocouple shorting jumper into the thermocouple terminals.
3. It is necessary for the jumper and terminals to stabilize to the same temperature. They
are stable in approximately 3 minutes.
4. Push  and  to zero the TC millivolt circuit.