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To change the flow rate units, the push button marked with the arrow pointing upwards, 
must be pushed. To change the totalized volume units, the push button  marked  with  the 
arrow pointing left must be pushed.   

The possible flow rate and totalized volume units are the following: 

Flow rate: 

There are 9 combinations made from 3 volume units and 3 time units. 

 

Volume / 

time   

 

l (litres) 

s (second) 

 

m

3

 (cubic meters) 

m (minute)  

 

ga (US gallons) 

h (hour) 

Totalized volume: 

There are 3 possible volume units, l (litres), m3 (cubic meters), ga (gallons) 

Note: 1ga = 3.785 litres. 

With the working units chosen, by pressing the two push buttons PROG, we go to the loop 
current programming. 

4.1.3 Current 

loop 

In the first screen we program the flow rate equivalent to 4 mA (lower range). 

The measuring units will be the ones chosen in the previous screen. The push buttons have 
the same function as the pulses per litre programming. 

4.1.2 Measuring 

units 

In this screen the measuring units can be programmed. 

Содержание CP CH420 Series

Страница 1: ...R MI CH420 Rev 1 english version Series CP CP CH420 converters Instructions manual The art of measuring...

Страница 2: ...nd safety with no obligation to update this manual Make sure this manual goes to the end user Keep this manual in a place where you can nd it when you need it In case of loss ask for a new manual or d...

Страница 3: ...ALCULATIONS 9 7 HART COMMUNICATION 9 8 KEYBOARD LOCK AND WRITE PROTECT 10 9 TECHNICAL CHARACTERISTICS 10 9 1 Input characteristics 11 9 1 1 COVOL input characteristics 11 9 1 2 TM input characteristic...

Страница 4: ...the instrument will stay watertight The cable gland is for cables with outside diameters between 3 5 and 7 mm To connect the cables peel the outer insulation to free the inner cables It is recommende...

Страница 5: ...CP CH420L sensor connections are the following Terminal n COVOL TM 1 Common Ground 2 Live Live 3 Live For the CP CH420R the connection is made directly from the instrument to the terminals 1 and 2 re...

Страница 6: ...actor given on the label of the COVOL or TM To do this pressing the push button marked with the arrow pointing upwards the blinking digit will increase When it reaches nine it goes back to zero With t...

Страница 7: ...ond m3 cubic meters m minute ga US gallons h hour Totalized volume There are 3 possible volume units l litres m3 cubic meters ga gallons Note 1ga 3 785 litres With the working units chosen by pressing...

Страница 8: ...e lost The screen will return to the normal working model and the word PROG will light on the screen indicating this event To remove the word PROG from the display press any of the two PROG push butto...

Страница 9: ...onverter which speci es a k factor 1 985 and when we check the volume of a batch we nd that instead of having 100 litres as programmed we only have 95 litres 5 less we must apply the following correct...

Страница 10: ...g any changes in the con guration 9 TECHNICAL CHARACTERISTICS Power supply 2 wires by means of the loop current The instrument has a protection diode to avoid damage if the power supply is connected w...

Страница 11: ...is with the switching points situated at about 1 V 2 1 V If an open collector transistor is to be used as the switching element instead of a COVOL then the aforementioned parameters must be taken into...

Страница 12: ...of production with the standards on the territory of the Customs Union particularly regarding safety requirements and electromagnetic compatibility 11 ADDITIONAL INSTRUCTIONS FOR THE ATEX VERSION Thi...

Страница 13: ...the housing screw as shown in the gure Earthing screw 11 1 3 Maintenance NOTE Before any maintenance that involves opening the flameproof enclosure make sure there is no voltage in any of internal co...

Страница 14: ...14 12 DIMENSIONS All dimensions in mm...

Страница 15: ...15 All dimensions in mm...

Страница 16: ...bstances The devices sent for repair must enclose the corresponding form which can be lled in via website from the same After Sales section Warranty for repaired or replaced components applies 6 month...

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