H-3185B CONTROLLER OPERATING INSTRUCTIONS -1© 2008 Humboldt Manufacturing
H-3185B CONTROLLER OPERATING INSTRUCTIONS TABLE OF CONTENTS 1.0 Introduction………………………………………………………………………3 2.0 Setup………………………………………………………………………………4 3.0 Set value Control…………………………………………………………………6 4.0 Operational Modes………………………………………………………………7 4.1 Changing Operational Modes…………………………………………………...8 4.1.1 Normal Mode…………………………………………………………………...8 4.1.2 Standby Mode…………………………………………………………………..9 4.1.3 Ramp/Soak Cycle Mode………………………………………………………11 5.0 Changing Ramp/Soak Cycle Settings…………………………………………..12 5.
1.0 Introduction The H-3185B controller (Figure 1) uses on-off control of heating and cooling devices to cycle between two temperatures. It can be set to cycle between two temperatures for a finite number of cycles and then stop. When set to run for a finite number of cycles, ramp rate between temperature extremes can be adjusted as well as soak duration at each temperature extreme. The controller is programmed to cycle from 40°F to 0°F when set to run in cycle mode.
2.0 Setup 1. Mount the controller box securely on a wall nearest to the Freeze/Thaw cabinet, but away from water or extreme moisture. 2. Plug in all electrical devices on the cabinet such as heaters, cooling system compressor, fan, and mechanical thermostat to the sockets at the bottom of the controller box (Figure 2). All electrical connections have twist to lock plugs that easily attach to the controller box. Each connection is different and no two connections can be confused. Figure 2 3.
Figure 3 4. Plug the main power cord from the controller box into an appropriate receptacle. The controller requires a 125VAC, 30 amp power source. 5. Connect the thermocouple wire from the machine to the matching connector coming from under the chart recorder. 6. The main circuit breaker is located on the side of the controller box near the door latches. Set the breaker to the ON position. 7. Wait for the controller to go through its self test.
Figure 4 3.0 Set Value Control The default mode for the controller is “Normal” mode. In this mode, the controller will try to maintain the temperature controlled by the Set Value (green display). When the controller receives power, it will automatically go to this mode. The controller will continue to heat or cool to maintain the set value temperature until it is manually stopped. To change the Set Value, press the up or down arrow button and the value in the green display will change.
4.0 Operational Modes There are four modes of operation with this controller. These modes are as follows: 1. FOP – Fixed Output Percentage The Freeze-Thaw machine does not use this function. 2. nor – Normal This mode, as stated in section 3.0, is the normal mode in which the controller will maintain the set value temperature. 3. stby – Standby This mode puts the controller on standby. The heating and cooling functions of the machine will be shut off. 4. r.
4.1 Changing Operational Modes 1. To change the mode of operation, press and hold the Mode button for at least three seconds. The red display will read “Ctrl” and the green display will read whatever mode it is currently in. 2. Use the up or down arrow buttons to change the setting on the green display to show the mode desired. 3.
Figure 5 3. Follow step 3 in section 4.1 to return to the temperature readings and begin the operation. Note: When in Normal mode operation, the controller will try to maintain the temperature of the set value (green display). If it is desired to maintain the test samples at a certain temperature, Normal mode should be used. If the controller was on standby when power to the controller was disconnected and later reconnected, the controller will automatically go into normal mode when it receives power. 4.
2. When the red display reads “CtrL”, press one of the arrow buttons until the green display reads “Stby” (Figure 6). Figure 6 3. Follow step 3 in section 4.1 to return to the temperature readings and begin the operation.
Note: When in Standby mode operation, the controller will be put on standby and heating and cooling functions of the machine will be shut off. 4.1.3 Ramp/Soak Cycle Mode 1. To change to Standby mode, follow the step 1 in section 4.1 for changing the operational mode. 2. When the red display reads “CtrL”, press one of the arrow buttons until the green display reads “r.s” (Figure 8). Figure 8 3. Follow step 3 in section 4.1 to return to the temperature readings and begin the operation.
ASTM C 666. The controller allows for up to 100 cycles in this mode. The controller is set up to cycle down to 0°F and then up to 40°F for a total of 36 cycles. When the last cycle has been completed, the controller will automatically go to standby mode. 5.0 Changing Ramp/Soak Cycle Settings The settings in the cycle recipe can be changed to the user’s needs. The temperature set points, ramp times, soak times, and number of cycles can be changed by going into the recipe menu.
Figure 9 3. Press the Mode button and the green display will show the first cycle recipe setting. The green display should alternate between “rOPt” (Figure 10) and “8.r.S”. There are three setting options: “8.r.S”, “S.SP.r”, and “diS”. The settings can be changed by pressing the up or down arrow buttons This setting should remain on “8.r.S”. Otherwise, the recipe function will not cycle between the two temperature set points. Figure 10 - 13 © 2008 Humboldt Manufacturing .
5.2 Setting Holdback Band 1. Continuing from section 5.1, while the green display is alternating between “rOPt” and “8.r.S” as in step 3 of the previous section, push the Mode button again until the green display reads “HLd.b” (Figure 11). This is the Holdback Band function. The green display will alternate between “HLd.b” and the holdback set temperature variance. Figure 11 Note: The Holdback Band changes the allowed temperature variance from the set value.
temperature changes as well as the overall cycling time. It is not recommended that this setting be changed. 5.3 Setting Termination State 1. Continuing from section 5.2, while the green display is alternating between “HLd.b” and “2.0” as in the previous section, push the Mode button again until the green display reads “tEr.S” (Figure 12). This is the Termination State function. The green display will alternate between “tEr.S” and “Stby”.
Note: The Termination State tells the controller what to do at the end of the test. The controller is preset to go to standby when the testing is complete. 1. 5.4 Setting Number of Cycles 1. Continuing from section 5.3, while the green display is alternating between “tEr.S” and “Stby” as in the previous section, push the Mode button again repeatedly until the green display reads “”rcY.n” (Figure 13). The green display will alternate between “rcY.n” and the number of cycles desired minus one (i.
5.5 Setting Power Fail-Resume Options 1. Continuing from section 5.4, while the green display is alternating between rcY.n” and the set number of cycles as in the previous section, continue pressing the Mode button until the green display reads “PFrE” (Figure 14). The display will alternate between “PFrE” and “on”. Figure 14 2. To change the option, press the up or down arrow button until the option is displayed.
5.6 Setting Ramp Times 1. Continuing from section 5.5, while the green display is alternating between “PFrE” and the set option as in the previous section, continue pressing the Mode button until the green display reads “rt1” (Figure 15). The display will alternate between “rt1” and the ramp time value (in minutes) for the first ramp in the cycle. It is capable of 8 ramp operations in the cycle. This is the first ramp time setting.
could cause fluctuations in the cycle ramp and greatly increase the overall cycle time. 5.7 Setting Soak Temperatures 1. Continuing from section 5.6, while the green display is alternating between “rt1” and the set ramp time value, continue pressing the Mode button until the green display flashes “SL1” (Figure 16). The display will alternate between “SL1” and the soak temperature value in degrees F. As in the case of the ramp time, this is the first of 8 soak levels available.
5.8 Setting Soak Time 1. Continuing from section 5.7, while the green display is alternating between “SL1” and the soak temperature, continue pressing the Mode button until the green display flashes “St1” (Figure 17). The display will alternate between “St1” and the soak time (in minutes). As in the case of the ramp time, this is the first of 8 soak times available.
required in the cycle, return to the main operating mode by pressing and holding down the Menu button until the red display reads the current temperature. Ramp time 2 is preset to 5 minutes. Soak level 2 is preset to 40°F. Soak time 2 is preset to 0. The remaining 6 ramp times are preset to 0. If the ramp time is set to 0, the ramp will be skipped. 6.0 Service For any service issues, contact Humboldt Scientific, Inc. at 1-800-537-4183 between 8:00 AM and 5:00 PM Eastern Time.
