Recalibration Procedures; Quick-Helps - Omega CN8200 Series User Manual

Recalibration
Procedures
1) Remove power from the controller and disconnect all
output devices. Disconnect input. Attach an appropriate
The Series CN8200
calibrator to the input terminals.
controller is precali-
brated at the factory. 2) Apply power to the calibrator, making sure that the
Under normal circum-
displayed value is not outside the range of the controller.
stances, the factory
Then, apply power to the controller.
calibration should be
3) Index to the Calibration Low menu item in the Calibration
valid for the life of
the instrument. If
Menu.
recalibration should
(You must have Security Level set to "Factory" to access this menu.)
be required, allow
4) Dial Calibrator to prompted value on the controller's
the controller to warm
up for 15 minutes display. See chart below for RTD resistance vs.
and follow these steps
temperature values.
carefully.
5) Allow the controller to settle for at least one minute.
6) Press Raise
7) Repeat Steps 4, 5, and 6 for the Calibration High setting.
8) Press the Menu Access key for three seconds to return to
the Process Value display.
Degrees (C)
0°
768°
328°
Key.
RTD Calibration Values
Degrees (F) Ohms
100 Ω
32°
366 Ω
1414°
222 Ω
622.4°

Quick-Helps

38 39
1. To return the unit to last operating mode
(Normal, Standby, FOP, or Tune):
Action
From Menu System: Press and hold
for 3 sec.
From Security Level Menu: Press
2. To enter Standby
operating mode:
Action
From Normal Press and hold
operating mode:
for 3 sec.
Press
Press
From FOP (Manual) Press and hold
operating mode:
for 3 sec.
Press
Press
From Menu System: Press and hold
for 3 sec.
Press and hold
for 3 sec.
Press
Press
Display
PV + SV + Mode
PV+ SV + Mode
Display
+ PV + SV
+ PV + SV
+ PV + SV