SPECIFICATIONS ACCURACY: 0.01% Reading, ±1 count Temperature Drift: 50 ppm/°C Worst Case ENVIRONMENTAL: -22°F (-30°C) to + 158°F (70°C) HUMIDITY 0 - 90% Noncondensing INPUTS: MAGNETIC PICKUP INPUT Frequency Range: 0 to 3500 Hz Trigger Sensitivity: 30 mV p-p Over Voltage Protected: ± 30 VDC OPTO-ISOLATED DC PULSE INPUT High (logic 1): 4-30 VDC Low (logic 0): Less Than 1 VDC Minimum Current: .5 mA Hysteresis: 0.4 VDC Frequency Range: 0 to 5 kHz Min. Pulse Width: 0.
INSTALLATION Battery Installation and IT 300N Initialization: All meter mounted IT 300N models are shipped with 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. The unit will have to be initialized and operating parameters entered. CAUTION : All IT 300N models are provided with two or more sources of power. The power should not be interrupted when changing batteries.
THEORY OF OPERATION Flow rate equation: Flow total equation: Input Frequency x Time Scaler FAC x FAC mul 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 Flow Total = Flow Rate Indication = Sum of Input Pulses FAC x FAC mul 10 Point Linearization Option: A 10 point linearization table is used to construct a curve describing the relationship of K-Factor and input frequency.
DEFINITIONS 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 4 digit code. If the entered code is correct, the display will advance to the next menu prompt (CLr tot). If incorrect, the display will return to the run mode. Clr tot: (clear total) Clears (resets) the totalizer. Press the E key to clear the total and return to the run mode.
DEFINITIONS (continued) fr# : (frequency for point #) This prompt will only appear when 10 point selected. It sets the frequency for each of the 10 points (#). 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 desired frequency for point #. faC# : (factor for point #) This prompt will only appear when 10 point selected. It sets the factor for each of the 10 points (#). Press the ↑ key to increment each digit.
DEFINITIONS (continued) r deCloC: (ratemeter decimal location) Sets the decimal location for the ratemeter. The ratemeter decimal is not a dummy decimal and will scale the rate display accordingly. (i.e. if the r decloc is set in the tenths position (123.4), 100 will be displayed as 100.0). The ratemeter decimal location is restricted to a maximum of 4 places (.1234). However, the number of ratemeter decimal locations allowable is reduced with each decimal place added to the factor decimal.
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. 0000 ENTER CODE 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 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 E Press the key to step to the desired totalizer descriptor. Press the E key to enter the displayed descriptor. Press the M key to skip and keep the existing descriptor. E key to step to the desired scale setting.
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 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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