Newport 1825-C, Operator'S Manual

Page: 16 / 37

5
AVERAGE
POWER
OFF MAX
ZERO
CAL
RANGE
CW
MODE
INTEGRATE
PULSE
P-P
■
Power/ Energy Meter
■
Model 1825-C
BAT TRIG
READ
1
2
4
1
.5
1.5
3
0 2
5
CAL
n m k W J
( I )
( O )
ON
OFF
Needle Acc.
±
2% FS
Figure 3 — Model 1825-C Front Panel Detail
ANALOG
OUTPUT
1
0
INPUT
CAL
BEEP
ON
BEEP
OFF
NORMAL
ACCEL
ADJ
EXP
ADJ
O
N
1 2 3 4 5 6 7 8
12 –18V
—-
- - -
LOW-POWER, (SEMICONDUCTOR)
HIGH-POWER, (THERMOPILE)
ENERGY 1 M
Ω
, (PYROELECTRIC)
ENERGY 50
Ω
, (PYROELECTRIC)
PROCESSED OUTPUT
UNPROCESSED OUTPUT
ACCELERATED
NOT ACCELERATED
-
-
1 0 0 0 0 0
0 0 1 1 0 0
0 0 1 0 1 1
0 1 1 0 1 1
- -
- -
- -
- -
1
0
1
0
Figure 4 — Model 1825-C Rear Panel Detail
2.3.1 RANGE
The RANGE knob adjusts the signal gain of the Model 1825-C. It has twelve
positions covering 6 decades of signal gain. Intermediate gain positions only
change the full scale reading of the analog display and do not effect either the
digital display or the analog output. Turn the RANGE knob clockwise (counter
clockwise) to decrease (increase) signal gain. The RANGE positions 1 thru 12
with position 1 being the furthest CCW postion, are illustrated in the figure on
page ix.
2.3.2 ZERO
This knob will adjust the display and analog output values down to zero. It is
used to zero the display to remove the effects of ambient signals before
making a measurement. The ZERO function has the capability of offsetting
signals over a 5 decade range. Turn the ZERO knob CW to
decrease the
negative (offsetting) signal that is injected.
Always use the ZERO knob to eliminate ambient and/or offset signals to insure
accurate readings.