Hach TitraLab AT1102, Руководство пользователя, Страница: 23 / 80

Figure 3 Tube adjustment
4.2 Install an external propeller
This accessory (Item no. LZE143) is used as an alternative to the standard magnetic stir
bar, for more viscous samples.
1. Install the propeller into the slot in the middle of the sensor holder.
2. Connect the propeller to the external propeller port on the rear of the instrument (refer
to
Instrument connections on page 9).
3. From the home screen, select Settings>Options. Set the option Propeller Stirrer.
Note: Push the up and down arrow keys to highlight the option. Push the left arrow to set the
option ON/OFF then push Done to confirm.
4.3 Install a balance
This accessory is used to automatically send accurate weights to the instrument. The
balance is a laboratory type balance and uses the RS232 communication protocol with no
flow control. When a balance is connected, the window shown at the end of a titration that
lets users enter a weight, shows the value from the balance.
The balance automatically sends the weight and unit to the instrument in textual format:
• Messages end with <LF>, <CR> or <LF+CR>
• The numeric value of the weight must be transmitted before the unit of weight
• Allowed units of weight are g, mg and kg
• The unit of weight specifies the end of the data string used by the instrument
• Space characters are ignored
1. Set the RS232 parameters on the balance to:
• 9600 baud
• no parity
• no handshake
• 8 data bits
• 1 stop bit
2. Connect the balance to the serial port on the rear of the instrument (refer to
Instrument connections on page 9) using an applicable cable.
3. From the home screen, select Settings > Options and make sure that the Balance
option is checked.
Install accessories
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