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A.6 ■ Appendix Watlow Series 93
Appendix
Equipment Required
• Precision dc voltage source 0-5 volt minimum range with 0.001 volt resolution.
Setup and Calibration
1. Connect the ac line voltage L1 and L2 to the proper terminals on the Series 93.
2. Connect the voltage/current source to Terminal 3 (+) and 5 (-) on the Series 93 terminal
strip. Use regular 20 - 24 gauge wire. Make sure the DIP switch is set for process input,
see Chapter Four.
3. Apply power to the controller and allow it to warm up for 15 minutes. After warm-up
put the controller in the [`CAL] menu. See Figure A.3. Select [`YES]. Press the
‰Advance key until 0.00 is displayed.
4. Press the ˆInfinity key twice to enter the manual mode. The controller is calibrating
when the % indicator light is on. Make sure the controller is in the manual mode only
when you are in the correct parameters.
5. At the 0.00 parameter, set the voltage source to 0.000 volts. Allow at least 10 seconds to
stabilize. Press the ‰Advance key.
6. At the 5.00 parameter, set the voltage source to 5.000VÎ (dc). Allow at least 10 seconds
to stabilize. The controller leaves the [`CAL] mode if 1 minute passes between key acti-
vations. Press the ˆInfinity key twice to exit the manual mode. To conclude the 0-5 volt
calibration, press the ˆInfinity key twice, then press the ‰Advance key to reach the
next prompt or to exit from the [`CAL] menu.
NOTE:
When the % indica-
tor light is on, the
controller is auto-
matically calibrating.
Your sequence is
VERY important.
Always move to the
next parameter
before changing the
calibration equip-
ment.
NOTE:
Before calibrating an
installed controller,
make sure all data
and parameters are
documented. See
the Setup and
Operation Tables in
Chapter Four .
0-5 Volt Input Field Calibration Procedure
4-20mA Input Field Calibration Procedure
Equipment Required:
• Precision current source 0-20mA minimum range with 0.01mA resolution.
Setup and Calibration
1. Connect the ac line voltage L1 and L2 to the proper terminals on the Series 93.
2. Connect the current source to Terminal 2 (-) and 5 (+) on the Series 93 terminal strip.
Use regular 20 - 24 gauge wire. Make sure the DIP switch is set for process input, see
Chapter Four.
3. Apply power to the controller and allow it to warm up for 15 minutes. After warm-up
put the controller in the [`CAL] menu. See Figure A.3. Select YES. Press the
‰Advance key until 4 is displayed.
4. Press the ˆInfinity key twice to enter the manual mode. The controller is calibrating
when the % indicator light is on. Make sure the controller is in the manual mode only
when you are in the correct parameters.
5. At the 4.00 parameter, set the current source to 4.00mA. Allow at least 10 seconds to
stabilize. Press the ‰Advance key.
6. At the 20.0 parameter, set the current source to 20.00mA. Allow at least 10 seconds to
stabilize. The controller leaves the [`CAL] mode if 1 minute passes between key activa-
tions. Press the ˆInfinity key twice to exit the manual mode. To conclude, press the
ˆInfinity key twice, then press the ‰Advance key to reach the next prompt or to exit
from the [`CAL] menu.