Hach SP-51 Manual Básico Del Usuario página 17

Figure 14 SP-510 keypad
Key Function
1 HARD LED
2 SOFT LED
3 ALARM OFF Sets the alarm to off. When more cycles are necessary to examine the water,
4 HARD CAL
5 ZERO CAL
Section 6 Startup
6.1 Start the instrument
Note: Install the pressure plate correctly to prevent sample flow directly into the reagents. Refer to
valve pressure plate on page 11.
1. Open the supply valve to the instrument.
2. Let the pressure in the tubes stabilize.
Note: If leaks occur under pressure, examine all connections. Secure connections until all leaks have stopped.
3. Set the power to on.
4. Operate the instrument for approximately 2 hours with the sample and reagents.
Note: The sample cell will have bubbles on the surface until it is fully wetted. The bubbles can cause irregular
readings until the sample flow stabilizes.
Section 7 Calibration
Chemical exposure hazard. Obey laboratory safety procedures and wear all of the
personal protective equipment appropriate to the chemicals that are handled. Refer to
the current safety data sheets (MSDS/SDS) for safety protocols.
7.1 Complete a 2-point calibration
Complete a calibration after reagent installation or when an optical system component is replaced.
The standardization procedure makes the sample first hard, then soft.
Table 3 Keypad description
Description
The monitor found hardness in the water. The status indicator light is red.
The monitor is in operation and no hardness shows. The status indicator light
is green.
set the alarm to off. The status indicator light is yellow.
Completes a hard calibration. Refer to
indicator light is yellow.
Completes a zero-point calibration. Refer to
status indicator light is yellow.
Calibration
C A U T I O N
on page 17. The status
Calibration on page 17. The
Install the pump
English 17