Practical Instrument Electronics 850 - Manual (Page 18)

Page 16
Pr
eliminar
y
T/C
All mA∙ Read V
-
2 3
RTD
Ω
RTD
Ω
6 5
4
+
Source & Read Hz∙ mV
Source V∙ pH
- +
1
-
Milliamp Receiver Input
Controller
Transmitter
Computer
Logger
I/P
DCS
HI
20.000
mA
SOURCE
5 6 + -
All milliamp connections
mA SOURCE/ % SOURCE (Percent of 4-20 or 10-50 mA)
Choose this function to provide an output from 0.000 to
24.000/0.000 to 52.000 milliamps. The compliance voltage is a
nominal 24 VDC to provide the driving power to your milliamp
receivers.
Move the power switch w to SOURCE then Double Click the
EZ-DIAL knob to get into the Menu. Turn the knob to scroll
through the settings and press the knob to make your selection.
Select mA for the FUNCTION and SOURCE for the MODE.
Choose either mA or % and whether you need the 250
Ω HART
resistor active in the loop (250Ω resistor is only available in
4-20mA operation).
Connect the output leads of the PIE 850 to the inputs of the
device being calibrated, making sure to check polarity. Red lead
to the plus (+) input and black lead to the minus (-) input.
Instantly output your SPAN and ZERO output settings by moving
the EZ-CHECK switch between HI and LO (defaults to 20 & 4
mA). You may also select any third output setting (such as
mid-range) using the SET position on the EZ-CHECK switch.
The output is adjusted in 0.001 mA (0.01%) increments by
turning the knob
e . Press and turn the knob for faster dialing
with 0.100 mA (1.00%) increments.