Brookfield Bath, Model TC-101 - Manual (Page 11)

12
RTD specifications
–Platinum RTD, four wire hookup
–100 ohms at 0°C
–DIN standard 00385 temperature coefficient
Hookup Specifications
Use a DB9 Male 9-pin connector with a housing to connecting cable to controller.
Connect four wires to pins 6, 7, 8, 9. Shielded wire should be used. Connect the shield
to ground on pin 1.
Automatic External Probe Calibration
To automatically match the external probe’s calibration to the internal probe, fill the units
reservoir with cold fluid, place the external probe into the reservoir, near the internal
probe
press and select 3 = CAL EXT for calibration . . . . . . . . . . . . . . . . . . . . .
If there is proper fluid in the bath and the external probe is placed properly,
select (YES) to CHECK BATH FLUID menu . . . . . . . . . . . . . . . . . . . . . . . . . .
If you select NO, the screen will ask for Max Setpoint Differential. Refer to FCN 4, under
steps for “Setting Maximum Setpoint Differential For External Probe.”
Enter two calibration temperatures close to the range where you will be working. The
unit will automatically match the probes at two temperatures that you select . . . . . . .
While no two RTDs have exactly the same curves the two RTD probes will now be
closely matched at those two points without factory calibration.
— Function Tuning (Pump Speed and Controller Optimization)
If the temperature stability using factory settings is satisfactory, there is no need to
change the pump speed and/or controller tuning. If needed, there are provisions to
optimize the controller for special applications.
The tuning parameters below are simplified and are figures that can be easily
measured and entered. The settings are not critical, estimates are acceptable. Each of
the three values used for tuning are independent can be changed without having to
change any other value.
— Pump Speed Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(also in section 3.2 To Change Pump Speed)
1. Press The pump speed menu will appear first.
2. Select the pump speed, then press
3. If further tuning is necessary, continue reading Function Tuning in this section.
If no further tuning is necessary, you can continue to FCN 7 -°U Cal.
1 = INTERNAL SENSOR
2 = EXT 3 = CAL EXT
CHECK BATH FLUID
UP = YES DN = NO
LO SETTING 25°C
HI SETTING 65°C
SELECT PUMP SPEED
HIT 1 THROUGH 5
The five selectable speeds
FULL =
HIGH =
MEDIUM =
LOW =
SLOW =