Hach-Lange 2100 N Laboratory Turbidimeter User Manual - Manual (Page 12)

Figure 5 Indicator lights
1 NEPH light 6 Auto Range light
2 EBC light 7 CAL? light
3 NTU light 8 RATIO light
4 Lamp light 9 SIGNAL AVG light
5 Manual Range light 10 S0–S4 lights
Table 2 Light descriptions
Light Description
NEPH Illuminated when the instrument is set for NEPH (nephelo) unit of
measure.
EBC Illuminated when the instrument is set for EBC unit of measure.
NTU Illuminated when the instrument is set for NTU unit of measure.
Table 2 Light descriptions (continued)
Light Description
Illuminated when the instrument light source is on.
Flashes when there is not sufficient light for measurement.
Manual
Range
Illuminated when the instrument is in manual ranging mode.
Auto
Range
Illuminated when the instrument is in auto ranging mode.
CAL? Turns on during a calibration if the calibration data is not within the
acceptable range.
Flashes when the instrument should be calibrated.
Note: The CAL? light applies when the USEPA filter and a 25-mm sample cell are
used. Ignore the CAL? light if illuminated during calibration when a different filter
or a smaller sample cell is used. Push UNITS/Exit to start measurements.
RATIO Illuminated when Ratio is on.
SIGNAL
AVG
Illuminated when signal averaging is on.
S0–S4 Show the current calibration point standard that is in use during
calibration.
Startup
Turn the instrument on
1. Put the instrument on a stable, level surface that is free of vibration.
Do not put in direct sunlight.
2. Make sure that there is air circulation around the instrument. Keep
the back and area below the instrument free of material that could
decrease air flow through the vents.
3. Connect the power cord to the power plug on the back of the
instrument.
4. Connect the power cord to a power socket with ground contact.
10 English