Serial Interface Settings; Zeroing The First Pump Head Operating Hours Counter - Lenntech Testomat 808 Manual De Mantenimiento Y De Servicio

Service programs
18
Quit Alarm key (fourth key from the left, short press of the key):
Auto-adjustment
Prerequisite: clear water in the measurement chamber.
In the first step, measurement is carried out using the measurement
LED 1 (yellow). The measurement amplifier gain is adjusted by
means of an electronic potentiometer. The LED above key 1 (Manual
start / Bleed) is lit.
If the adjustment is successful, the potentiometer setting will be
stored permanently. The LED above key 2 (Flush internal/external) is
also lit.
If the comparison fails, the LED above key 1 (Manual start/Bleed)
flashes.
In the second step, measurement is carried out using the measure-
ment LED 2 (red). The current through the measurement LED is set
using an electronic potentiometer. The LED above key 3
(Standby/72h) is lit. If the comparison is successful, the potentiometer
setting will be stored permanently. The LED above key 4 (Alarm) is
also lit.
If the adjustment fails, the LED above key 3 (Standby/72h) is lit.
When the adjustment has been completed successfully, all key LEDs
are lit and the pump operating time is preset to 7 seconds.
The program is now once again in the main loop of the test program
and the POWER LED flashes.

Serial interface settings:

- 9600 baud
- 8 bit
- 1 stop bit
- No parity
Zeroing the first pump head operating hours
counter

Press and hold the horn key and switch the instrument on.
The first pump head operating hours counter is set to zero and the
maintenance indicator (LED E4) no longer flashes.
The first pump head operating hours counter registers up to a maxi-
mum of 150 hrs.
The second pump head operating hours counter registers until the
variables overflow (a theoretical value of over 1 million hours) and is
reset via "WRH" by means of a PC (see chapter, "Test and Adjust-
ment program").