Watlow Series SD Limit - Manual (Page 39)

Wa t l o w S e r i e s S D L i m i t ■ 37 ■ C h a p t e r 8 F a c t o r y
Calibrating the Series SD Limit
Warm up the unit for 20 minutes. To reach the cali-
bration prompts, enter the Factory Page by holding
down the Up Key ¿ and Down Key ¯ for six seconds.
Once in the Factory Page
[FACT], use the Advance ‰
key to select a prompt. The last prompts on the Factory
Page are the input and output calibration prompts.
You can restore the original factory calibration with
Restore Factory Calibration [rESt] (Factory Page).
*Note: InfoSense TM should be turned off while verifying calibration
of the controller with a calibration source.
Thermocouple Input Procedure
Equipment
• Type J reference compensator with reference junc-
tion at 0°C (32°F), or type J thermocouple calibra-
tor to 0°C (32°F).
• Precision millivolt source, 0 to 50 mV minimum
range, 0.002 mV resolution.
Input Setup and Calibration
1. Connect the correct power supply to terminals 1
and 2 (see Chapter Two).
2. Connect the millivolt source to terminals 11 (-) and
10 (+) with copper wire.
3. Enter 50.00 mV from the millivolt source. Allow at
least 10 seconds to stabilize. Set Thermocouple Cal-
ibration, 50 mV
[tc;50] to [`yES]. Press the Ad-
vance Key ‰ to store 50.000 mV input and move to
the next prompt.
4. Enter 0.000 mV from the millivolt source. Allow at
least 10 seconds to stabilize. Set Thermocouple Cal-
ibration, 0 mV
[tc;00] to [`yES]. Press the Ad-
vance Key ‰ to store 0.000 mV input and move to
the next prompt.
5. Disconnect the millivolt source and connect the ref-
erence compensator or thermocouple calibrator to
terminals 11 (-) and 10 (+). With type J thermocou-
ple wire, if using a compensator, turn it on and
short the input wires. When using a type J calibra-
tor, set it to simulate 0°C (32°F). Allow 10 seconds
for the controller to stabilize. Set Thermocouple
Calibration, 32°
[tc;32] to [`yES]. Press the Ad-
vance Key ‰ to store type J thermocouple calibra-
tion and move to the next prompt.
6. Rewire for operation and verify calibration.
RTD Input Procedure
Equipment
• 1 k
Ω
decade box with 0.01
Ω
resolution.
Input Setup and Calibration
1. Connect the correct power supply to terminals 1
and 2 (see Chapter 2).
2. Connect the decade box to terminals 10 (S1), 11
(S3) and 8 (S2), with 20 to 24-gauge wire.
3. Enter 15.00
Ω
from the decade box. Allow at least
10 seconds to stabilize. Set RTD Calibration, 15
Ω
[`r;15] to [`yES]. Press the Advance Key ‰ to
store the 15.00
Ω
input and move to the next
prompt.
4. Enter 380.00
Ω
from the decade box. Allow at least
10 seconds to stabilize. Set RTD Calibration, 380
Ω
[r;380] to [`yES]. Press the Advance Key ‰ to
store the 380.00
Ω
input and move to the next
prompt.
5. Rewire for operation and verify calibration.
Voltage Process Input Procedure
Equipment
• Precision voltage source, 0 to 10V minimum range,
with 0.001V resolution.
Input Setup and Calibration
1. Connect the correct power supply to terminals 1
and 2 (see Chapter Two).
Input
2. Connect the voltage source to terminals 11 (-) and
9 (+) of the controller.
3. Enter 1.00V from the voltage source to the con-
troller. Allow at least 10 seconds to stabilize. Set In-
put Calibrate, 1V
[``u;1] to [`yES]. Press the Ad-
vance Key ‰ to store the 1.00V input and move to
the next prompt.
4. Enter 9.00V from the voltage source to the con-
troller. Allow at least 10 seconds to stabilize. Set In-
put Calibrate, 9V
[``u;9] to [`yES]. Press the Ad-
vance Key ‰ to store the 9.00V input and move to
the next prompt.
5. Rewire for operation and verify calibration.