Electronic Level Switch ENS 3000 Mat. no.: Edition: 669740 12.07.
Contents E Page 1. Functions of the ENS 3000 3 2. Installation 3 3. Commissioning 5 4. Operating controls of the ENS 3000 6 5. Digital display 6 6. Output signals 6.1. 6.1.1 6.1.2 6.2. 6.3. SWITCHING OUTPUTS Switching point (SP) mode Window (WIN) mode ANALOGUE OUTPUT SETTING THE SWITCHING POINTS AND HYSTERESES OR SWITCHING RANGES FOR THE WINDOW MODE 6.4. SETTING RANGES FOR SWITCHING OUTPUTS 6.5. SETTING RANGES FOR THE OFFSET 8 8 8 9 9 11 12 7. Basic settings 7.1.
1. Functions of the ENS 3000 The unit has the following functions, depending on the model: • Display of the actual fluid level in inch or cm (depending on version). • Display of the actual temperature in °F or °C. • Display of the lowest and peak value of the fluid level or temperature or of a pre-set switching point. • Switching of the switching outputs according to the fluid level or temperature and the pre-set switching parameters. • Analogue output.
E The following conditions must be met for safe operation of the ENS 3000: • When installing in small plastic tanks, the unit must be installed as near as possible to the centre of the tank. • If the fluid is contaminated, the unit must be installed at a point where the fluid is turbulent (e.g. at the inlet/outlet) • When installing in metallic rising pipes (bypass line) the sensor must be mounted in the centre of the tube.
There is an earthing screw on the mechanical adaptor which may be used as a functional earth terminal. If no earth connection is available because of the particular installation circumstances (e.g.: if the tank is plastic), the functional earth must be connected. We recommend using a 16 AWG cable and as short a line length as possible. The level switch ENS 3000 must be installed as near to vertically as possible in the tank.
4. Operating keys of the ENS 3000 1 or 2 Switching points E indicates if temperature in °C or °F HYDAC °C °F SP1 4 Switching points °C °F 4-digit digital display cm SP2 Display indicating fluid level unit (cm/inch) SP1 LED-Display of the active switching point mode 1 4-digit digital display 3 4 2 SP2 LED-Display of the active switching point mode Keys for setting switching points, switch-back points and additional functions 5.
• Display of the lowest fluid level "n.MIN" Continuously displays the lowest fluid level measured in the system since the unit was last switched on or reset. • Display of the actual temperature "TEMP" • Display of the peak temperature" T.TOP" Continuously displays the highest temperature measured in the system since the unit was last switched on or reset. • Display of the lowest temperature "T.
6. E Output signals 6.1 SWITCHING OUTPUTS The ENS 3000 may have 1 or 2 or 4 switching outputs. The following output signals can be set using the basic settings: 6.1.1 Switching point (SP) mode A switching point and a hysteresis can be assigned to each switching output. Each output will then switch as soon as its preset switching point has been reached and will switch back as soon as the switch-back point is reached.
6.2 ANALOGUE OUTPUT The versions with 1 or 2 switching points can have an analogue output as an option. The output can be switched to either 4 .. 20 mA or 0 .. 10 V (corresponding to measuring range) via the basic menu and can be assigned to fluid level or to temperature (optional). E The versions with 4 switching points have two 0 .. 10 V analogue outputs. In this case fluid level and temperature are permanently assigned to an output. 6.
E Notes: • If "LOC" appears in the display when attempting to change a setting, programming is disabled. Corrective action: Set the programming enable(s) to "free". (see Point 9 "Programming enable") • If the ; key or < key is held down while changing a setting, the value will advance automatically. • Whenever any settings have been altered, "PROG" appears briefly in the display when the display switches over. The new setting(s) have therefore been saved to the unit.
6.4 SETTING RANGES FOR THE SWITCHING OUTPUTS (switching point minus switching hysteresis = switch-back point) Probe length Measuring zone in cm in cm 25.0 17.0 41.0 26.0 52.0 36.0 73.0 59.0 The increment for all units is 0.1 cm. Switching point in cm * 0.3 .. 17.0 0.4 .. 26.0 0.5 .. 36.0 0.9 .. 59.0 Switching hysteresis in cm * 0.1 .. 16.5 0.1 .. 25.7 0.2 .. 35.6 0.3 .. 58.4 Probe length Measuring zone Switching point in inch in inch in inch * 9.80 6.70 0.10 .. 6.70 16.20 10.25 0.15 .. 10.25 20.50 14.
6.5 E SETTING RANGES FOR THE OFFSET Probe length Measuring zone in cm in cm 25 17 41 26 52 36 73 59 The increment for all units is 0.1 cm. Setting range for Offset in cm* 0 .. 68 0 .. 104 0 .. 144 0 .. 177 Probe length Measuring zone Setting range for in inch in inch Offset in inch* 9.80 6.70 0 .. 26.80 16.20 10.25 0 .. 64.80 20.50 14.15 0 .. 82.00 28.40 23.20 0 .. 69.60 The increment for all units is 0.05 inch. * All ranges given in the table can be adjusted by the increments shown.
7. Basic settings The function of the ENS 3000 can be adapted to suit the particular application by altering several basic settings. These settings have been combined in a menu. 7.1 ALTERING THE BASIC SETTINGS Important note: When the "basic setting" menu is activated, no switching operations will be carried out! Activating the basic settings menu: → 3s press the "mode" key until the required menu item appears, then release the "mode" key (see Point 7.
7.2 SUMMARY OF THE BASIC SETTINGS Setting E Assignment of switching output 1 (S.S.1) Switching output 1 to switch at the pre-set fluid level. Switching output 1 to switch at the pre-set temperature Switching mode, switching output 1 (S.m.1) Switching output 1 is operating in switching point hysteresis mode Switching output 1 is operating in window mode Switching direction, switching output 1 (S.d.1) Normally open.
Display Settings Default available setting Setting Primary display (Primary) Value to be continuously displayed: Actual fluid level Peak fluid level Lowest fluid level Actual temperature Peak temperature Lowest temperature to 4 Switching point 1 to 4 E niv/ n.Top/ n.Min/ Temp/ T.Top/ T.Min/ S.P.1/ S.P.2/ S.P.3/ S.P.4/ OFF niv inch/ cm inch (depending on version) Display off (See Point 5. "Digital Display") Setting the unit of measurement for fluid level (NIVEAU RANGE i.e.
Setting E Display Settings Default available setting Setting the type of fluid Fluid level sensor calibrated to oil oil/ AcL oil parameters Fluid level sensor calibrated to cooling lubricant parameters (Aqueous cooling Lubricants ≙ AcL) When the new selection is saved, the change is active. On the version with 4 SP the message is also displayed. Assigning the analogue output (Select Output)* Assigns the analogue niv/ niv output to fluid level. TEMP Assigns the analogue output to temperature.
8. Resetting the peak values The ENS 3000 has an option for resetting the peak values of fluid level and temperature (depending on the model). To reset a peak value, proceed as follows: HYDAC E HYDAC → fluid level indication → 3s mode mode ? ? Press both arrow keys simultaneously and hold them down for 3 s. 9. Programming enable The ENS 3000 has two types of programming enable, both of which must be set to "enabled" before the settings may be altered.
9.2 ALTERING THE MAIN PROGRAMMING ENABLE Switch off the supply voltage or disconnect the unit from the supply voltage. E HYDAC mode HYDAC → 6s 2s mode Use the or ? Press both arrow keys simultaneously and hold them down. Switch on the supply voltage (hold keys down for 6 s.
10. Messages 10.1. ERROR MESSAGES If an error is detected, a corresponding error message appears that must be acknowledged by pressing any key. Possible error messages are as follows: E.01 The switching points and hysteresis that have been set are such that the resulting switch-back point falls outside the permissible setting range. Example: Switching point has been set to 8.20 inch, the hysteresis to 9.05 inch. Action: Correct the setting(s). E.10 A data error has been detected in the saved settings.
10.2. OTHER MESSAGES Other messages that cannot be acknowledged by pressing any key may also appear on the display. E Possible message, if the ENS has not yet been used: : Flashing display of all centre LEDs. The ENS detects an undefined condition, i.e. the level of the fluid is outside the active zone. Therefore the level is either too low or too high. Action: If level is too low: top up the fluid until a valid measurement is detected.
11. Pin connections 11.1. Pin connections with 1 or 2 switching points 11.2. Pin connections with 4 switching points E Model with 4 switching outputs and 2 analogue outputs 8-pole plug M12x1 + 4 1 2 18 .. 35 V - 3 ENS 3X1P-8 5 Imax. 250mA SP 1 Imax. 250mA SP 2 Imax. 250mA SP 3 Imax. 250mA SP 4 7 8 U=0..10V analogue level U=0..10V analogue Temp.
12. Technical specifications 12.1 ENS 3000 WITHOUT TEMPERATURE SENSOR E Input data: Fluid level sensor: Sensor type Probe length Active zone Inactive zone Max.
12.2 ENS 3000 WITH TEMPERATURE SENSOR Input data: ENS 3000 Fluid level sensor: Sensor type Probe length Active zone Inactive zone Max. speed of change in fluid level Repeatability Switching point accuracy capacitive fluid level sensor 9.80, 16.20, 20.50, 28.40 inch 6.70, 10.25, 14.15, 23.20 inch 3.10, 5.95, 6.35, 5.20 inch 9.80 inch: 1.57 inch/s; 16.20 inch: 2.36 inch/s; 20.50 inch: 3.15 inch/s; 28.40 inch: 3.
13. Ordering information ENS 3 X 1 X – X –XXXX – 400 – K E Series no.
14. Accessories 14.1. ELECTRICAL CONNECTORS 14.1.1 For use with output options "2" and "3" ZBE 06 (4 pole) M12x1 right-angle connector Order no.: 6006788 1.38“ (35mm) &0.79“ (20mm) E 1.10“ (28mm) 1.04‘‘ ZBE 06-02 With 2m cable Order no.: 6006790 (26.5mm) ZBE 06-05 With 5m cable Order no.: 6006789 1.24‘‘ (31.50mm) 14.1.2 For use with output options "2", "3" and "5" ZBE 06 (5 pole) M12x1 right-angle connector Order no.: 6006786 ZBE 08-02 (5 pole) With 2m cable Order no.
14.1.2 For use with output option "8" E ZBE 0P (8 pole) M12x1 right-angle connector Order no.: 6055444 1.38“ (35mm) &0.79“ (20mm) 1.10“ (28mm) 1.10“ (28mm) ZBE 0P-02 (8 pole) with 2m cable Order no.: 6052697 ZBE 0P-05 (8 pole) with 5m cable Order no.: 6052698 26 1.
14.2. MECHANICAL CONNECTION 14.2.1 ZBM 19 –Straight threaded bulkhead fitting to ISO 8434 E 14.2.
15. Dimensions ENS 3000, ceramic E Area for clamping or fixing ENS 3000 e.g. using mechanical accessory ZBM 19 or ZBM 20 4 pole ∅1.65 Installation dimension ∅2.13 5 pole ∅1.65 Installation dimension ∅2.13 Dimension I 8 pole ∅1.65 Installation dimension ∅2.13 28 M L G [inch] 0.87± 0.04 6.70 9.80 13.40 [inch] 1.10 ± 0.04 10.25 16.20 19.70 Key I M L G Inactive zone (lower) Sensor zone Probe length Total length [inch] 1.34 ± 0.04 14.15 20.50 24.00 [inch] 1.95 ± 0.04 23.20 28.40 32.
16. Application examples 16.1 HYDRAULIC POWER UNIT: TO MONITOR MINIMUM FLUID LEVEL WITH ADVANCE WARNING AND ALARM In this example application, an advance warning should be given when the fluid level reaches 1.18 inch and tank refilling should be started. An alarm should be triggered if the fluid level drops below 0.39 inch and reset once the fluid level has reached 0.59 inch again.
E 16.2 HYDRAULIC POWER UNIT: TO MONITOR MINIMUM FLUID LEVEL WITH ADVANCE WARNING AND MINIMUM TEMPERATURE MONITORING In this example application, an advance warning should be given when the fluid level reaches 1.18 inch and tank refilling should be started. In addition, the temperature of the hydraulic fluid should not drop below a minimum value. If, for example, 68 °F is reached, a stop signal will be given. Furthermore the temperature, in the form of a 4 ..
HYDAC ELECTRONIC GMBH Hauptstr. 27 D-66128 Saarbrücken Germany E Tel.: +49-(0)6897-509-01 Fax: +49-(0)6897-509-1726 HYDAC Service If you have any questions concerning repair work or modifications, please contact HYDAC Service. HYDAC SERVICE GMBH Hauptstr. 27 D-66128 Saarbrücken Germany Tel.
Notizen / Notes / Notes 32
