Watlow Series 93 - Manual (Page 37)

W a t l o w S e r i e s 9 3 A p p e n d i x ■ A . 5
Appendix
NOTE:
Before calibrating an
installed controller,
make sure all data
and parameters are
documented. See
the Setup and
Operation Tables in
Chapter Four.
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.
Equipment Required
• Type "J" Reference Compensator with reference junction at 0°C/32°F, or Type "J"
Thermocouple Calibrator set at 0°C/32°F.
• Precision millivolt source, 0-50mV min. range, 0.01mV resolution
Setup And Calibration
1. Connect the ac line voltage L1 and L2 to the proper terminals.
2. Connect the millivolt source to Terminal 5 Negative and Terminal 3 Positive on the
Series 93 terminal strip. Use regular 20 - 24 gauge wire. Make sure the DIP switch is
set for thermocouple 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 Calibration Menu. See Figure A.3. Select [`YES].
4. Press the ˆInfinity key twice to enter the manual mode. The controller is calibrating
when % indicator light is on. Make sure the controller is in manual mode only when
you are in the correct parameters.
5. At the 0.00 prompt, enter 0.00mV from the millivolt source to the controller. Allow at
least 10 seconds to stabilize. Press the ‰Advance key.
6. At the 50.0 prompt, enter 50.00mV from the millivolt source to the Series 93. Allow at
least 10 seconds to stabilize. Press the ‰Advance key.
7. At the [``tC] prompt, disconnect the millivolt source, and connect the reference com-
pensator or thermocouple calibrator to Terminal 5 Negative, and Terminal 3 Positive
on the Series 93 terminal strip. If using a compensator, turn on and short the input
wires. If using the "J" calibrator, set it to simulate 0°C/32°F. Allow 10 seconds for the
controller to stabilize. The controller will leave the
[`CAL] mode if one minute passes
between key activations. To conclude the thermocouple calibration, press the ˆInfinity
key twice, then press the ‰Advance key to reach the next prompt or to exit from the
[`CAL] menu.
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 2, 3 and 5 on the terminal strip. Use
regular 20 - 24 gauge wire of the same length and type. Make sure the DIP switch is
set for RTD 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 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 ˆInfinity key twice, then press the ‰Advance key to reach
the next prompt or to exit from the
[`CAL] menu.
Thermocouple Field Calibration Procedure
RTD Field Calibration Procedure