User manual ALFA 37 `mmWK`
Contents
1. User manual ALFA 37 mmWK Low pressure gauges with a range 5 20mmWK and a 2 wire input 4 20mA ALFA 37 VDH doc 071745 Version v1 0 Date 22 06 2007 Software ALFA 37 mmWK_F File Do071745 wpd Range 5 20 mmWK per 1 mmWK Installation On the top side from the ALFA 37 you can see how the sensor and power supply has to be connected After connecting the ALFA 37 to the power supply a self test function is started As this test is finished the measured pressure appears in the display Controlling The ALFA 37 low pressure gauge don t need push buttons for normal use For dimming the sensor there three hided pushbuttons on the front These keys are SET view change the adjusted value UP increase the adjusted value DOWN decrease the adjusted value The hided push buttons are located at the following places D DS CO units SET Lower right side beside the display E UP Upper left side beside the display DOWN Lower left side beside the display Setting internal parameter The dimming of the sensor can be adjusted with an internal parameter By pushing the DOWN key more than 10 seconds you enter the internal programming menu In the left display the upper and lower segment are blinking The value can be read out by pushing the SET key Pushing the UP or DOWN keys allows you to change the value of this parameter If no key is pushed for 20 seconds the ALFA 37 chan2. dl Ait ddns 304g XEU peo Ly L 15Vde oer 10 SPATE CL U 09g XEN vu0e E nding eem OM Lo ebuey i T Vdc bei i O nef jenuaiajyiq z 2 3 KUS i Rm w n P P S BW t dei STe 7 N5 asf gt O z et OI e e LO OD 195140 o gt ei D TA N D oan 8 T 403 OW aH Ee v i TE XxX But44L4 paqueg gt a et OO D A d pue d SE
3. ges to it s normal operation mode Parameter list ALFA 37 DESCRIPTION PARAMETER STANDAARD VALUE Dimming pressure signal Adjusting read out The pressure read out has to be adjusted on the pressure sensor itselfs with the use of the Adjust screw see connections diagram PX25 2 Adjusting dimming The input signal can be dimmed so the read out will be slower parameter 04 The higher the value the bigger the dimming Error messages On the display from the ALFA 37 the following error messages can appear EE Adjustments are lost Solution reprogram the adjustments Technical data Type ALFA 37 Low pressure gauge Range 5 20 mmWK read out per 1 mmWK Supply 230 Vac of 24Vdc of 12Vdc Relay SPDT 250V 16A C NO 8A C NC cos phi 1 Controlling Through push buttons on the front Front Polycarbonate Pressure sensor Px25 4 20mA 0 1 WC needs external supply 12Vdc Dimensions 35 x 77 x 71 5mm wd Panel cut out 28 x 70mm hw Provided with memory protection during power failure Connection with screw terminals on the backside Special version are available upon request Adress VDH Products BV Produktieweg 1 9301 ZS Roden Netherlands Dimensions 60 Tel 31 0 50 30 28 900 Fax 31 0 50 30 28 980 Email info vdhproducts nl Internet www vdhproducts nl Connections PAGI aosu s Lddns Co eubls UOWWOD AQ ILAPZ UO IPA
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