Hach BioTector B7000 User Manual page 91

7. Sample Valve. Use this function to test the Sample (ARS) Valve. The valve has three positions, SEN1
(Sample Pump to Bypass), SEN2 (Sample Pump to Reactor), and SEN3 (TIC Acid/TC Base to Reactor).
To position the valve in different positions, press the ENTER key, select the required position, and press
ENTER again.
8. Sample Pump. This function can be used to test the Sample Pump. The pump has four operation modes:
FWR (forward), REV (reverse), P-FWR (pulse control forward) and P-REV (pulse control reverse). To run
the pump in the required mode, press ENTER, and select the operation mode. When P-FWR or P-REV
modes are selected, the number of pulses (½ revolution of the pump roller) must be entered. When the
pump is running, the actual pulse time (outside the brackets) and programmed pulse time (inside the
brackets) are displayed. The pump stops when the programmed number of pulses is completed. To stop
the pump manually, press ENTER, select OFF, and press ENTER again.
9. Injection Valve. Use this function to test the Injection Valve. To change the state of the device, press the
ENTER key, set the device to ON/OFF, and press the ENTER key again. If the device is on, it will be
marked with an "*".
10. Circulation Pump. Use this function to test the Circulation Pump. To change the state of the device,
press the ENTER key, set the device to ON/OFF, and press the ENTER key again. If the device is on, it
will be marked with an "*".
11. HCl Water Pump (if configured in the system). Use this function to test the HCl Water Pump. To
change the state of the device, press the ENTER key, set the device to ON/OFF, and press the ENTER
key again. If the device is on, it will be marked with an "*".
12. Sample Out Valve. Use this function to test the Sample Out Valve. To change the state of the device,
press the ENTER key, set the device to ON/OFF, and press the ENTER key again. If the device is on, it
will be marked with an "*".
13. Exhaust Valve. Use this function to test the Exhaust Valve. To change the state of the device, press the
ENTER key, set the device to ON/OFF, and press the ENTER key again. If the device is on, it will be
marked with an "*".
14. Cleaning Valve (if configured in the system). Use this function to test the Cleaning Valve. To change
the state of the device, press the ENTER key, set the device to ON/OFF, and press the ENTER key
again. If the device is on, it will be marked with an "*".
15. Calibration Valve (if configured in the system). Use this function to test the Zero and Span Calibration
Valves. To change the state of the device, press the ENTER key, set the device to ZERO/SPAN/OFF,
and press the ENTER key again. When the relevant device is on, it will be marked with an "*".
16. Stream Valves (if configured in the system). Use this function to test the Stream Valves. To test a
Stream Valve, press the ENTER key and select the number of the valve to be tested. Press the ENTER
key again and the valve will be activated. To turn the valve off, select OFF. These valves can be driven
either from programmable relays or from the Stream Expansion (Auxiliary) PCB. Note that only one
Stream Valve can be switched on at any given time.
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