Liquid Controls IT375 - Manual (Page 7)

Sponsler, Inc. Model IT375 Operation Pg. 7
3. OPERATION
The Model IT375 Rate Indicator and Totalizer accepts a sinewave or pulse input from a wide range of flowmeters. The
instrument is fully programmable with all operating parameters and calculation constants programmable from the front
panel. The setup parameters are stored in a non-volatile memory and are retained for at least 40 years in the event of a
power loss.
3.1 DISPLAY
The Model IT375 displays:
Rate
Resettable Total
Accumulated Total
Both the Rate and Resettable Total are displayed continuously. The Accumulated Total is displayed only when the
ACCUM TOTAL key is depressed.
The keys on the front of the IT375 have the following functions:
Depressing this key will display the
Accumulated Total.
Depressing this key resets the Resettable Total
at any time.
Depressing this key advances the Program Mode scroll
3.2 TEST MODE
The IT375 has a Test Mode which can be entered by simultaneously depressing all 3 front panel keys. The tests and
results are as follows:
Low Test Depressing the ACCUM TOTAL key, the low alarm output (if installed) will go low. If
a 4-20mA option is installed, the output will go to 4mA.
High Test
Depressing the RESET key, and depending on the programmed pulse output mode, the
high alarm output (if installed):
a. will go low if CAL0 = 0 (low and high alarms)
b. will output 100ms pulses every 0.5 sec if CAL0 = 1 (scaled pulse output).
c. will output 1ms pulses every 0.5 sec if CAL0 = 2 (unscaled pulse output).
If a 4-20mA option is installed, the output will go to 20mA.
Display Test
Depressing the PROGRAM key, all segments of the display will flash.
To exit the Test Mode, simultaneously depress all three front panel keys.
RESET
PROGRAM
ACCUM
TOTAL