Thermo Fisher Scientific Alpha pH 2000 - Manual (Page 38)

– “PH SY” = pH measurement with symmetrical input
– “PH ASY” = pH measurement with asymmetrical input
– “ORP % SY” = ORP-% measurement with symmetrical input
– “ORP % ASY” = ORP-% measurement with asymmetrical input
– “ORP mV SY” = ORP-mV measurement with symmetrical input
– “ORP mV ASY” = ORP-mV measurement with asymmetrical input
Press the ENT key to confirm your selection.
5. Setting the alarm delay time in seconds: press the
▲ or ▼ key to set
the alarm delay time (setting range: 0 to 1999 seconds). Press the ENT
key to confirm your setting.
Note: With this parameter you set the delay before the alarm relay
activates when the set point has been exceeded.
6. Selecting the alarm contact type: press the
▲ or ▼ key to select the
alarm contact type:
– “STDY” = steady contact
– “FLET” = fleeting (single pulse) contact
Press the ENT key to confirm your selection.
Note: With this parameter you select whether the alarm contact will
operate as a steady contact or a fleeting (single pulse) contact. Pulse
contact closing time is 1 second.
7. Selecting the sensor type: press the
▲ or ▼ key to select the sensor
type which is connected to the controller:
– “GLAS” = glass electrode
– “ANTY” = antimony electrode
Press the ENT key to confirm your selection.
Note: This parameter is not available in ORP mode.
Note: After each changeover, the factory calibration data for zero point
and slope are overwritten. Be sure to recalibrate (see section 5).