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Curtis Model 3301T Digital Instrumentation – September 2021
OPERATING VOLTAGE
The following table describes the B+ startup and operating voltages:
Minimum
9VDC
Applying B+ voltages above 120V may damage the 3301T and is not recommended. The device is
designed to withstand continuous reverse polarity connections.
Note: All voltages listed in this manual are DC voltages.
OPERATING CURRENT
The following tables describe the B+ pin's operating current with the LCD heater off and on:
Table 6 Operating Current — LCD Heater Off
B+ Voltage
12V
24V
36V
48V
60V
72V
80V
96V
Table 7 Operating Current — LCD Heater On
B+ Voltage
12V
24V
36V
48V
60V
72V
80V
96V
pg. 26
Minimum Startup
Nominal
10VDC
12–96VDC
Keyswitch on
Typical
Maximum
166mA
209mA
80mA
100mA
56mA
69mA
46mA
54mA
39mA
54mA
36mA
42mA
34mA
40mA
33mA
37mA
Typical
Maximum
645mA
685mA
575mA
596mA
536mA
550mA
524mA
530mA
488mA
503mA
482mA
486mA
470mA
475mA
463mA
466mA
Maximum
120VDC
Keyswitch off
110mA
54mA
39mA
32mA
28mA
26mA
25mA
24mA
3 — INSTALLATION AND WIRING
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