EUTECH INSTRUMENTS ALPHA PH 1000 PHORP CONTROLLERTRANSMITTER, Инструкция по эксплуатации, Страница: 13 / 40

Instruction Manual alpha-pH 1000
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5 MEASUREMENT
5.1 Display in Measurement mode
When the controller is initially powered on, it automatically enters into the Measurement mode after the large
dual LCD displays all segments briefly.
The upper display shows the measured pH or ORP value, while the lower display shows either the temperature
value if the controller is set for pH measurement or “OrP” if it is set for ORP measurement.
Annunciators at the right side of the display indicate whether the controller is set for pH or mV measurement. If
the controller is set for ORP % measurement, neither the pH or mV indicator displays.
Similarly annunciators or icons at the top or left side of the display shows the current status of controller, e.g.
“MEAS”, “SETUP”, “CAL”, “READY”, etc. In addition, error messages also guide the user in time of any faulty
conditions as indicated by “ERR” or icons flashing.
5.1.1 Check electrode performance
To read current electrode slope and offset values without changing them:
1)
Press the CAL key followed by the ENTER key without adjusting the security code (leave code at “000”).
The upper display shows electrode slope. The lower display reading shows the pH reading at 0 mV.
Note : If security code is changed to a value other than “000”, press the ENTER key will return to
Measurement mode, without displaying electrode information.
2) Press the ENTER key a second time to return to Measurement mode.
5.1.1 Checking set points
To read current set point values without changing them:
1)
Press the RELAY Selection (Rel A/Rel B) key . The upper display shows the set point for Relay A; the
lower display shows “SP1”.
2) After two seconds the upper display shows the set-point value for Relay B; the lower display shows “SP2”.
3) After an additional two seconds, the controller returns to its Measurement mode.
5.2 Security Codes
This controller has two levels of security protection with separate security codes. The first level allows entry
into the Calibration mode: security code = 11; the second allows entry into the SETUP mode: security code =
22.
The security codes protects the controller from unauthorised tampering of its current setting. The parameters
cannot be changed unless the security code is entered.