BNC 970 Portable Multi-Channel Analyzer (MCA) - Manual (Page 5)

Model 970 Instruction Manual 2
1.2 Hardware Description and Controls
1.2.1 Front Panel
1. On/Off Switch.
2. Power On LED. Glows red when the Model 970 is powered on.
3. Charge Mode Switch.
Slow Charge: Internal NiMH batteries are recharged using a trickle current which will
fully charge depleted batteries in about 14 hours and safely maintain them at full capacity
indefinitely.
Fast Charge:
Internal NiMH batteries are undergoing a fast charge. Batteries will be fully
charged in about three to four hours. Unless a fast charge is required, this switch should
be left in the Slow position to maximize NiMH battery life.
4. Fast Charge Indicator LED. Glows green when Fast charge is in operation. This LED
turns off when the fast charge is complete, indicating that the Charge Mode switch can be
set back to the Slow position.
5. External Power Indicator LED. Glows red when external power is connected,
regardless of whether the 970 is powered on or off.
6. SHV Connector. This provides the High Voltage output only for INPUT2 (i.e., will not
accept a coupled signal).
7. BNC Connector. This provides the signal input only for INPUT2 (i.e., does not carry High
Voltage).
8. Series “C” Connector. This provides High Voltage and accepts coupled signal for
INPUT1.
9. Mini DIN-7 Connector. This provides ±12-volt power if needed for detector preamplifiers.
Also provides + 5 volts as well as logical outputs coupled to ALARM0 and ALARM1 in the
Model SNAP-MCA software.
10. DB9 Connector. Communication port for connecting the 970 with a controlling device
(e.g., computer).
1.2.2 Rear Panel
1. External Power Input. Accepts 12VDC at 1.25A. Input voltage should never exceed
15V, as damage to the Model 970 could result.
2. Fan. The fan runs anytime the 970 is connected to external power. It does not run (and is
not needed) when running on batteries.