Practical Instrument Electronics 820 - Manual (Page 22)

Page 20
RTD Source
Choose this function to provide a simulated RTD signal into
controllers, temperature transmitters, indicators or any input
devices that measure RTD sensors.
Move the power switch w to SOURCE then Double Click the
EZ-DIAL knob to get into the Double Click Menu. Turn the knob
to scroll through the settings and press the knob to make your
selection. Select RTD for the FUNCTION, °F or °C for the UNITS
and RTD (Choose from one of Platinum 100Ω, or 1000Ω, Copper
10Ω or 50Ω, Nickel 120Ω or 110Ω curves). Note: Pt 100Ω 3850
is the most common RTD type.
Disconnect all sensor wires from the devices to be calibrated
and connect the PIECAL 820 to the inputs of the device using 2,
3 or 4 wires.
Instantly output your SPAN and ZERO output settings by moving
the EZ-CHECK switch between HI and LO. 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 0.1°
increments by turning the knob
e . Press and turn the knob for
faster dialing with 10.0° increments.
2, 3 & 4 Wire RTD Connections Process Calibrator
mA ∙ V ∙ TC ∙ Ω ∙ RTD ∙ Hz
SOURCE
HI
SET
LO
OFF
MAX
READ
MIN
READ
OVERLOAD Hz SYNC
Double Click
Menu
Push & Turn
for
Fast Dialing
Push & Hold
to Store/Step
READ
Pt 100
α
=3850 °C
820.0 HI
Instrument with RTD Input
Controller
Temperature Transmitter
Temperature Indicator
Temperature Trip or Alarm