Brookfield Bath, Model TC-101 Digital KU-1 Viscometer - Manual (Page 9)

2.13 Optimization of Controller
There is provision to optimize the the controller for special applications. If the temperature stability
using factory settings is satisfactory, there is no need to change the controller tuning.
Control performance equal to or greater than ± 5°C from the setpoint temperature is not affected by
tuning. To achieve close control, tuning may be necessary if you use: a closed loop system of large
volume; a fluid other than water; or a viscous fluid.
Tuning of Proportional Integral Derivative (PID) controllers requires extensive knowledge of PID
technology or time lost in pure guesswork. The tuning parameters below are simplified and are figures
that can be easily measured and entered. Settings are not critical, estimates are acceptable.
Each of the three values used for tuning can be changed without having to change any other value.
Each value is independent.
TO CHANGE THE TUNING:
Press and hold the SET/ENTER button until the display reads "UNIT".
Turn the INCREASE/DECREASE knob until the display reads "CAP" - Capacity.
1. Press SET/ENTER.
2. Enter the estimated total system volume in liters using the INCREASE/DECREASE knob.
3. Press SET/ENTER or setting is accepted after a few seconds.
Turn the INCREASE/DECREASE knob until the display reads "FLO" - Flow Rate.
1. Press SET/ENTER.
2. Enter the estimated actual flow rate in liters per minute using the INCREASE/DECREASE knob.
3. Press SET/ENTER or setting is accepted after a few seconds.
Turn the INCREASE/DECREASE knob until the display reads "SHC"- Specific Heat Capacity.
1. Press SET/ENTER.
2. Enter the specific heat capacity of the fluid being used by using the INCREASE/DECREASE knob.
3. Press SET/ENTER or setting is accepted after a few seconds.
Refer to Section 2.3 Reservoir Fluids for specific heat values of various liquids and Section 4.8
Controller Default Settings for returning to factory default controller settings.
2.14 Controller Display Messages
Display Message
Normal Screens
.... Standby mode. Unit plugged in. Power switch OFF.
8888 Power up self-test. Power switch ON.
Menu Screens
FLO Flow rate selection for controller tuning
CAP Capacity (volume) for controller tuning
SHC Specific heat value for controller tuning
Unit Change to °F or °C
Error Screens
AL-M High temperature alarm
E-oP Over temperature fault
E-5F Sensor failure
E-tF Triac (alternistor) failure
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