Brookfield 75 User Manual
BROOKFIELD MODEL 75
TEMPERATURE CONTROLLER
Operating Instructions
Manual No. M/98-205-A0100
SPECIALISTS IN THE
MEASUREMENT AND
CONTROL OF VISCOSITY
BROOKFIELD ENGINEERING LABORATORIES, INC.
11 Commerce Blvd., Middleboro, MA 02346 USA
TEL508-946-6200
F
AX
508-946-6262
Brookfield Engineering Labs., Inc. Page 1 Manual No. M/98-205-A0100
or 800-628-8139 (USA excluding MA)
NTERNET
I
http://www.brookfieldengineering.com
Contents
I.INTRODUCTION .................................................................................................. 3
II.SPECIFICATIONS ................................................................................................ 3
II.1 Power............................................................................................................. 3
II.2 Controller ....................................................................................................... 3
III.INSTALLATION .................................................................................................... 4
III.1 Probe ............................................................................................................ 4
III.2 Recorder ....................................................................................................... 4
III.3 AC, Power Switch and Power Fuse .............................................................. 5
III.4 Load .............................................................................................................. 5
IV.CONTROL KEYS AND DISPLAY PANEL ........................................................... 6
IV.1 The °F/°C Key .............................................................................................. 6
IV.2 The RUN/STBY Key .................................................................................... 6
IV.3 The SET Key ............................................................................................... 7
IV.4 The Arrow (direction) Keys .......................................................................... 7
IV.5 The HEAT LED ............................................................................................ 7
IV.6 The RUN LED .............................................................................................. 7
IV.7 Piezo Buzzer................................................................................................. 7
V. TEMPERATURE CONTROLLER OPERATION .................................................. 7
V.1 Powering Up the Model 75 Temperature Controller....................................... 7
V.2 Setting a Temperature ................................................................................... 8
VI. ERROR MESSAGES AND FAIL SAFES ........................................................... 9
VI.1 Open Sensor Error ....................................................................................... 9
VI.2 Thermosel Overheat Error.......................................................................... 10
VI.3 High/Low Temperature Limit Error.............................................................. 10
VII. TROUBLESHOOTING .................................................................................... 10
Appendix A - Warranty Repair and Service ........................................................... 11
Brookfield Engineering Labs., Inc. Page 2 Manual No. M/98-205-A0100
I. INTRODUCTION
The Model 75 T emperature Controller is part of the Brookfield Thermosel accessory to allow for
viscosity measurements at elevated temperatures. The unit includes a solid state proportional
temperature controller, a means for entering the desired temperature setpoint and appropriate
status indicators.
The front panel is used to display and enter setpoint temperatures. The front panel also presents
the status of the system (e.g. the current temperature of the Thermosel and any error messages).
A list of the parts shipped with the Model 75 Controller is provided below. If any parts are missing or damaged, please contact Brookfield or your local authorized representative immediately.
Model 75 System Contents
Description Part Number Quantity
Temperature Controller HT-109 1
RTD Temperature Probe DVP-94Y 1
Operating Instructions Manual M/98-205 1
Recorder Output Cable HT-88Y 1
A.C. Power Cord DVP-65 (115v) 1
DVP-66 (230V) 1
TABLE 1
II. SPECIFICATIONS
II.1 Power
Voltage Specifications
(check the label beneath the Temperature Controller
Input V oltage/Frequency for the voltage requirements of your unit)
II.2 Controller
Range above ambient to 300°C/572°F
Resolution 0.1 °C or °F
Reading ±1.0°C up to +150°C
Accuracy ±2.0°C +150 to 300°C
Setpoint The temperature will be maintained within 0.3°C of
Stability the setpoint.
Recorder Output Voltage 0 to 4 Volts
85-265 VAC; 50/60 Hz
TABLE 2
Temperature Controller Specifications
1 volt = 0°C/32 °F; 4 volts = 300°C/572°F
TABLE 3
Note: The temperature accuracies stated above are a result of the combined accuracies of
the Model 75 Controller, the RTD temperature probe, and the Thermo Container.
Brookfield Engineering Labs., Inc. Page 3 Manual No. M/98-205-A0100
Thermosel Container
Thermosel Container Specifications
Range above ambient to 300°C/572°F
Accuracy ±0.5% of the controller setpoint
TABLE 4
III. INSTALLATION
Plug the R TD Temperature Probe (DVP-94Y) into the “probe” receptacle, the Thermo Container
into the “Thermosel” receptacle, and a strip chart recorder (if used) into the recorder jack. The
rear panel will appear as follows in Figure 1.
OFF ON
Thermosel
Probe
F
U
S
E
Power Input
Figure 1
III.1 Probe
Recorder
The probe is a 100 ohm precision platinum RTD (Resistance Temperature Detector) probe
(Brookfield Part No. DVP-94Y) which is plugged into the probe port on the rear panel.
Note: The RTD Probe must be plugged into the Model 75 Controller and the RTD Probe end
must be inserted into the Thermo Container before power is turned on. An error message
will be displayed if the Model 75 Controller is turned on and the RTD Probe is not installed.
III.2 Recorder
The recorder jack provides a signal to a recording device (the HT-88Y cable is provided for this
service) such as a strip chart recorder . The full scale recorder output signal range is from 0 to 4 V
for the Thermosel. The temperature can be obtained from the output potential (in mV) as follows:
Brookfield Engineering Labs., Inc. Page 4 Manuel No. M/94-203-D89
The 0 to 4 volt output corresponds to a temperature range of -100°C (-148°F) to 300°C (572°F).
Realistically, temperatures in the Thermosel will typically be above ambient. Therefore, output
voltages will generally range from slightly less than 2 volts (<100°C) to the full 4 volts (300°C).
Brookfield Engineering Labs., Inc. Page 4 Manual No. M/98-205-A0100
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