SelfTank ASTM

SelfTank ASTM

All liquids change capacity, when are changing temperature. In practice all the time are changing fuel capacity in storage tank.

Device SelfTank ASTM permanently registers changed temperatures of fuel in tank. On this ground SelfTank ASTM calculate fuel density and capacity in +15ºC.

This solution does possibility of fuel settling in the same temperature.

The event effect of capacity changing, shows example:

 

A customer received 20 000 ltr of fuel in +15ºC and in density 837 kg/m. After night outside temperature falled to +5ºC. Morning customer had in tank only 19 836 ltr*.

When in winter time temperature fall to -5ºC, in tank will be only 19 667 ltr.

 

Morning driver filled two tanks 450 ltr of each, together 900 l. Temperature of fuel was -5ºC. He filled not 900 ltr, he filled 914 ltr.This event is much more bigger in above ground tanks.

When we receive fuel in temperature +15ºC, we should report fuel in the same temperature.

 

*calculation base on ASTM-ISOD1250-80 Petroleum MeasurementTables

Technical details

Screen display	7 LEDs segments
Keypad	(optionally) 3x4, folio or metalic
Memory capacity	1400 registrations,
Interval	from 1 min.up to 18 houers
Quantity of probes	1 to 10 probes
Max. lenght of main	up to 100 m
Registration temp. range	from  -55C to +125C
Accurancy	+/- 0,5ºC
Network work	possibility of registrators work dispersed localisations
Data transmission	series port RS232, asynchronous transmission 9600 bps (optionally RS422,RS485, modem AT, modem GSM, connecting to local PC network, by radio WiFi LAN)
Power supply	230 V AC
Operating temp. work	-40C to +80C
Flow rate	to 70 or 90 l/min.

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