Product Manual

Application Notes
Thermocouple Transmitter 4
4-11
Precision Current Trip
1. Disconnect test leads from external devices.
2. Select current output on the primary display as given in the “DC Current Output” section
of Chapter 4.
3. Select voltage input on the isolated display as given in the “Voltage Input” section in
Chapter 5.
4. Connect the trip as shown in Figure 4-9.
5. To verify and calibrate the trip, refer to the trip documentation.
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
100 V PK
MAX
HI
INPUT
LO
Switch Test
Reset
LOOP
HART
PWR
+
NO
C
NC
+
-
-
+ +
+
+
+
5V
Bench Power
Supply
Press and Hold
for Switch Test
VOLTS
mA
gwp028.eps
Figure 4-9. Precision Current Trip Application