CONTENTS Specifications ................................................................... 1 Battery Installation and Replacement .............................. 2 Dimensions ....................................................................... 3 Theory of Operation .......................................................... 4 Wiring ............................................................................... 4 Typical Applications ..........................................................
SPECIFICATIONS Description Featuring 5 digits of rate and 8 digits of total, the IT 300N is a battery or loop powered indicator capable of accepting magnetic pickup, DC pulse or switch closure inputs from pulse producing flowmeters. The IT 300N uses the 4-20mA loop to provide power. ACCURACY: 0.
BATTERY INSTALLATION and REPLACEMENT Battery Installation: All meter mounted configured IT 300N models are shipped without the batteries installed. When using external BATPACK, mount within 12" and plug connector into 3 position square posts (see Fig 1). Polarity is not a concern because center is common. To install the batteries, begin by locating the battery holder. This requires opening the enclosure cover and removing the IT 300N to expose the battery holder.
battery(ies) correctly. To Initialize, Locate the “initialize” terminals on the IT 300N PCB (see Fig1). Using a small length of wire, temporarily jumper across the initialize terminals. The unit will respond by showing its software version number and then DIMENSIONS illuminating the LCD display. See Programming Flowchart to setup desired operating parameters. Fig 1 Rear View BATPACK BATPACK Connector 6 5 4 3 2 1 Battery 12 1110 9 8 7 2.093 (53) 1.75 (44.5) 1.10 (28) 1.0 (25.4) 2.125 1.
THEORY OF OPERATION Flow rate equation: Flow total equation: Input Frequency Flow Rate Indication = x Time Scaler FAC Flow Total T = Sum of Input Pulses FAC Where Time Scaler is equal to: 1 for rate per second read out 60 for rate per minute read out 3600 for rate per hour read out 86400 for rate per day read out “D” option Only 20 Point Linearization Option: A 20 point linearization table is used to construct a curve describing the relationship of K-Factor and input frequency.
DEFINITIONS Save Total: (Save Total) Press the E key while the unit is running to save the total value. The display will show "save total" for a few seconds. This is a very useful "scratch pad" to save and restore total when replacing the battery(ies) ent Code: (enter code) This prompt will only appear if the panel lock is ON. Press the ↑ key to increment each digit. Press the ← key to step to the next digit to the left. Press the E key to enter the 5 digit code.
DEFINITIONS (continued) tdeC: (totalizer decimal) Sets the decimal location for the totalizer. The totalizer decimal is not a dummy decimal and will scale the totalizer display accordingly. (i.e. if the tdec is set in the tenths position (1234567.8), 100 will be displayed as 100.0). The location of the decimal point allows for greater resolution of both the totalizer display and the pulse output. The pulse output advances at a rate dependent on the least significant digit of the totalizer.
DEFINITIONS (continued) pUlscale: (pulse out scaling) This allows the unit to output a pulse for each least significant total count divided by the selected divider. The pulse out can be divided by 1 (d 1), 10 (d 10), 100 (d 100), or turned off (off). With the divider set at 1, the unit will give a pulse out for every increment of the LSD displayed. Note: For maximum battery life, turn the pulse output off when pulse output is not used.
PROGRAMMING FLOWCHART RA RATE RUN MODE Press the M key to enter the programming menu. TOTAL If panel lock OFF M If panel lock ON If the panel lock is on, you must enter the 4 digit lock code to gain access to the menu. Press the key to increment each individual digit of the code. Press the key to advance to the next digit. Press the E key to enter the displayed code.
PROGRAMMING FLOWCHART (continued) Continued From Previous Page TDEC TOTAL DECIMAL 12345678 E M TOTAL DESCRIPTOR SCALE (ratemeter) GAL LIT FT3 ToT DESC M3 "blank" M (BBL, MCF) SEC NNIN HRS (Days) SEC r SCALE E M 1234 RA RATE DECIMAL LOCA LOCATION E R DECLoC Press the key to step the totalizer decimal to the desired location. Press the E key to enter the displayed decimal location. Press the M key to skip and keep the existing location Press the key to step to the desired totalizer descriptor.
OPERATION A suitable pulse producing device or flow meter is wired to one of the three pulse inputs provided on the IT 300N. Only one of these inputs is used in a given application. There are no connections to the two unused pulse inputs. Isolated magnetic pickups may be connected to terminals 1 and 2. Isolated contact closures may be connected to terminals 5 and 6. Any high level, DC pulse type may be connected to terminals 9(-) and 10(+).
ERROR MESSAGES The IT 300N is provided with extensive self checking which assists the user in the location of setup entry errors and in reporting malfunctions or unusual operating conditions. When an error occurs, the display will flash. Press any key to see the error message corresponding to the error that has occurred. Press any key again to acknowledge the error.
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