Watlow Series V4 - Manual (Page 15)

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 V4.
2. Connect the voltage/current source to Terminal 5 (+) and 6 (-) on the Series V4 termi-
nal block. Use regular 20 - 24 gauge wire. Make sure the DIP switch is set for process
input.
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 ˆInfinity 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 sec-
onds to stabilize. The controller leaves the [`CAL] mode if 1 minute passes between
key activations. Press ˆInfinity twice to exit the manual mode. To conclude the 0-5
volt calibration, press the
‰ Advance key to the next prompt or exit the [`CAL] menu.
NOTE:
Before calibration on an
installed controller,
make sure all data and
parameters are docu-
mented.
0-5 Volt Input Field Calibration Procedure
NOTE:
When the % indicator
light is on, the controller
is automatically calibrat-
ing. Your sequence is
VERY important. Always
move to the next param-
eter before changing the
calibration equipment.
Equipment Required
• 1K Ω precision decade resistance box with 0.01 Ω resolution.
Setup And Calibration
1. Connect the ac line voltage L1 and L2 to the proper terminals.
2. Connect the decade resistance box to Terminal 4, 5 and 6 on the terminal block. Use
regular 20 - 24 gauge wire of the same length and type. Make sure the DIP switch is
set for RTD input.
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. Select [`YES]. Press the ‰Advance key until
the 440 prompt 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 manual mode only
when you are in the correct parameters.
5. At the 440 prompt, set the decade resistance box to 44.01. Allow at least 10 seconds to
stabilize. Press the ‰Advance key.
6. At the 255 prompt, set the decade resistance box to 255.42. Allow at least 10 seconds
to stabilize. Press the ˆInfinity key twice to exit the manual mode. The controller will
leave the [`CAL] mode if one minute passes between key activations. To conclude the
RTD calibration, press the ‰Advance key to the next prompt or exit the [`CAL] menu.
RTD Field Calibration Procedure