Hach-Lange SD900 Refrigerated Sampler, SD900 AWRS Basic User Manual - Manual (Page 16)

Startup
Turn the instrument on or off
The refrigerator starts after a 5-minute delay when the equipment is plugged in. Push the POWER
key to turn on or turn off the controller. The refrigerator continues to run when the controller power is
turned off. Unplug the power cord on the AWRS or both power cords on the refrigerated sampler to
turn off the entire instrument.
Operation
Configure the system settings
1. Push MENU.
2. Go to SYSTEM SETUP.
3. Change the applicable options.
Option Description
Time/date setup Set the time (24-hour format) and date.
Communication Select the baud rate (19200, 38400, 57600 or 115200) and protocol (Modbus
RTU or ASCII) for the serial port.
Setup base Select the sampler base (All weather refrigerated, refrigerated or portable).
Language Select the language of the controller.
Liq sensor cal Calibrate the liquid sensor.
Pump duty cycle Change the pump duty cycle. Range: 75% to 100% (default: 100%).
Thermal setup (AWRS
only) Change the setpoint temperature inside the refrigerated compartment. Range:
2 to 10 °C (default: 4 °C).
Set contrast Adjust the contrast of the LCD screen.
Password setup Set up a password to control access to the program setup and the system setup
menus. Select ENABLE>YES to set a new password or ENABLE>NO to
activate the current password. If the password is set for the first time, use
900900 as the current password.
Tubing life Set a reminder when the pump tubing is to be changed. Go to ENABLE>RESET
CYCLES to reset the pump cycle count to 0. Go to ENABLE>CYCLE LIMIT to
change the number of pump cycles that is used for the reminder. Go to
ENABLE>STATUS to show the current number of pump cycle counts.
SDI–12 (optional) Configure the operation of an SDI–12 device. This option is shown only when a
device is found.
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