Alicat Scientific Product Catalog - Alicat Scientific - #49

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47 Alicat Scientifi c, Inc. tel: 888 290 6060 7641 N Business Park Drive fax: 520 290 0109 Tucson AZ 85743 USA www.AlicatScientifi c.com Totalizer Flow meters and controllers can be ordered with the Totalizing option. This option adds an additional mode screen that displays the total fl ow (normally in the units of the main fl ow screen) that has passed through the meter or controller since the last time the Totalizer was cleared. The counter resolution is six digits (leading zeroes supressed). At the time of order, you specify the resolution of the count. For instance, if a resolution of 1/100ths of a liter is specifi ed for a meter, which is totalizing in liters, the maximum count would be 9999.99 liters. If the same unit were specifi ed with a 1 liter resolution, the maximum count would be 999999 liters. You will also choose what the Totalizer is to do when the maximum count is reached: No Rollover – When the counter reaches the maximum count – it stops counting until the counter is cleared. Rollover – When the counter reaches the maximum count – it automatically rolls over to zero and continues counting until the counter is cleared. Rollover with Notifi cation – When the counter reaches the maximum count – it automatically rolls over to zero, displays rollover error (OVR) and continues counting until the counter is cleared. The display shows the elapsed time since the last reset in 0.1 hour increments. The maximum measurable elapsed time is 6553.5 hours (about nine months). The hours count resets when the “Clear” button is pushed, an RS-232 clear is executed, or on loss of power (a battery back-up can prevent Totalizer clear when power is lost). The counter can be reset to zero at any time by pushing the “Clear” button or via an RS-232 serial command. Pulse Output (PUL: Flow): Available on all fl ow devices, the pulse output option is a simplifi ed totalizer. It is available on pin 2 of the 8-pin mini din connector. Units with the pulse output function do not have the static 5.12Vdc output, the option for a secondary analog output or alarm. The parameters for the pulse output are factory set and must be requested at time of order. This option will create a state change on pin 2 from 0Vdc to 5Vdc (or 5Vdc to 0Vdc on alternate periods) each time the total amount of predefi ned fl ow passes through the unit. For example: M-10SLPM-D /5M, PUL:0.1SL Every time a total fl ow of 0.1 standard liter passes through the unit, Pin 2 will go from 0 to 5Vdc. Alarms Alicat M, L or P Series meters and gauges can be ordered with a simple alarm. You can program in the fi eld the alarm set-point via the local display, RS-232 or analog input. There are two types of alarms available. Both types operate on pin 2 of the 8-pin mini-din connector (detailed diagram page 10). Units with the alarm function do not have the static 5.12Vdc output, the option for a secondary analog output or the pulse ability. ALH: This alarm format, which is programmed by the factory, will cause pin 2 to go from a 0Vdc output directly to a 5Vdc output when the alarm set-point is exceed. For example, a 0-20SLPM mass meter (M) is programmed by the user with an alarm condition of 13.75SLPM. When the fl ow exceeds 13.75SLPM, pin 2 will change state to a 5Vdc output. For a pressure gauge (P) series, the alarm state change will occur when the pressure exceeds the set-point . ALL: This alarm format is similar to the ALH option, except the state change to 5Vdc occurs when the process parameter (fl ow or pressure) is under the set-point . Alternate Units of Measure All devices are listed in full-scale ranges of cubic centimeters/minute, liters/minute or pounds/square inch. Alternate units of measure are available at no additional cost. Commonly requested alternate units of measure include SCFM, SCFH, mmHG, and inH2O. Please consult the factory for additional customization options, including: Customized process connections Alternate materials of construction (e.g. aluminum bodies to reduce weight) Complete private label package (labels, software, manuals, etc.) Hours Mass Clear 0.3 0.00 Mass SCCM Air +0.0SCCM Total Mass Device Totalizer Display