5
W
W
kW
µW
µW
mW
µW
nW
nW
mW
µW
µW
W2
200
20
20
200
2
mW
mW
W
LOW POWER
LOW POWER W/ATTN
HIGH POWER
LOW POWER
HIGH POWER
(Position 3)
(Position 2)
(Position 1)
(Position 4)
(Position 5)
(Position 6)
Figure 4 — Model 1815-C Range Knob
2.2.2 ZERO Knob
The ZERO knob adjusts the display and analog output values up or down. It is
used to zero the display to remove the effects of low level ambient signals
before making a measurement. The ZERO function can offset signals over a 5
decade range.
NOTE
Turn the ZERO knob clockwise (counter clockwise) to reduce (in-
crease) the offsetting signal generated by the ZERO circuit.
2.2.3 SETUP DIP Switch Bank
The SETUP DIP switch bank configures the meter to the type of Newport
detector the meter will be used with. The following table identifies the func-
tion each SETUP switch position performs:
Table 3 — SETUP DIP Switch Functions
SETUP Switch Switch Position Description
1 & 2 Selects for Low-Power (semiconduc-
tor) detector (1,0) or High-Power
(thermopile) detector (0,1).
3 Sets the calibration factor exponent.
See Section 2.4.4
4 Selects Accelerated (1) or Not
Accelerated (0) response.
See Section 2.4.5
Please carefully read this instruction manual before using the Model 1815-C
Optical Power Meter. If any operating instructions are not clear, contact
Newport Corporation.
The Model 1815-C Optical Power Meter relies on the user to properly install
the calibration factor describing the detector at the measurement wavelength
in use. In order to assure that accurately calibrated measurements are
obtained, please carefully read and follow the instructions regarding Detector
Calibration Factor and its entry. See Sections 2.4.4, 2.4.4.1 and 2.4.4.2.
1
0
1 2 3 4
Using the System
2.4
Getting Started
2.3
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