Global Specialties 1310 - Manual (Page 9)

7 - Flip-up Leg :
Easily raised or folded, this will elevate the front of the power supply
approximately 1 inche for better visibility.
8 - Ground terminal :
Binding post connected to the chassis and to earth ground through
the third wire of the AC power line cord.
9 - B Terminals :
Output terminals for variable supply B. The red terminal is positive
( + ); the black terminals is negative ( - ).
10 - A Terminals :
Output terminals for variable supply A. The Red terminal is positive
( + ), the black terminals is negative ( - ).
11 - 5 Volt Terminals :
Output terminals for the 5 volt DC supply. The Red terminal is
positive ( + ), the black terminal is negative ( - ).
12 - Overload Indicator :
LED lights when 5 volt supply current exceeds approximately 1 amp.
3.2 INITIAL INSPECTION and CHECKOUT
Plug the line cord into a suitable 3-wire AC outlet. Note : if a 2-wire
to 5 wire adapter must be used. be sure the groundwire or tab of the
adapter is attached to a good earth ground. This promotes safe
operation by keeping the case, chassis, and earth ground binding
post at true earth potantial.
With no load connected, turn on the power supply by pressing the
POWER switch; display will light to indicate the power is applied.
Turn both the A & B voltage controls fully counter-clockwise to their
minimum settings. Set the A / B meter switch to the A position. Set
the V / A meter switch to the V setting. Slowly increase the A supply
output voltage by rotating the A supply voltage control clockwise.
The display should show an increase from 1.3 volts ( or less ) at the
minimum setting to 20.0 volts ( or more ) at the maximum setting.
Check the variable supply B by setting the A / B meter switch to B and
rotating the B supply voltage control clockwise. Again the display
should show an increase from 1.3 volts to 20.0 volts.
The fixed 5 volt supply may be checked by attaching an external
voltmeter to the 5 V output terminals. The voltmeter should read
between 4.8 and 5.2 volts.
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4 ) Adjust trimpot R58' to obtain a reading of 100.0 millivolts.
5 ) Set VOLT / AMP METER SWITCH of the 3310 to the V ( Volt ) position.
6 ) Set the A / B METER SWITCH of the 1310 to the A position.
7 ) Connect the digital multimeter to the A supply binding posts, with the
positive lead on the red binding post and the negative lead on the
black binding post.
8 ) Set the A ADJUST CONTROL for a reading of 20.0 volts on the digital
multimeter.
9 ) Adjust trimpot R33' to obtain a reading of 20.0 volts on the 1310 display.
10) Set the A / B METER SWITCH of the 1310 ot the B position.
11) Connect the digital multimeter to the B supply binding posts, with the
positive lead on the red binding post and the negative lead on the
black binding post.
12) Set the B ADJUST CONTROL for a reading of 20.0 volts on the digital
multimeter.
13) Adjust trimpot R20' to obtain a reading of 20.0 on the 1310 display.
14) Disconnect the digital multimeter from the binding posts and set the
VOLT / AMP METER SWITCH to the A position.
15) Adjust trimpot R15' to obtain a reading of 000 on the display.
16) Set the A / B METER SWITCH to the A position.
17) Adjust trimpot R28' to once again obtain a reading of 000 on the display.
18) Set the VOLT / AMP METER SWITCH to the V position, and turn the
1310 off.
19) Connect a jumper from the positive ( Red ) binding post of the A supply
to the negative ( Black ) binding post of the B supply.
20) Set the A and B ADJUST CONTROLs to their fully counterclockwise
position.
21) Connect one end of an 80 Ohm resistor to the positive binding post of
the B supply.
22) Connect the other end of the 80 Ohm resistor to the position lead of the
digital multimeter.
23) Connect the negative lead of the digital multimeter to the negative
binding post of the A supply.
24) Set the digital multimeter to measure and display current.
25) Turn the 1310 on and, while monitoring the A supply voltage on the
1310 display, set the A supply for a 10 volt output.
26) Increase the output of the B supply until the digital multimeter reads
250 milliamps.
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