EUTECH INSTRUMENTS ALPHA PH1000 PHORP CONTROLLERTRANSMITTER Manual de instrucciones descargar pdf (Pagina 14)

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 lower display shows either

temperature value if controller is set for pH measurement or “OrP” if it is set for ORP

measurement.

Annunciators at right side of display indicate whether 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 top or left side of display show current status of controller, e.g.

“MEAS”, “SETUP”, “CAL”, “READY”, etc. In addition, error messages also guide 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 to return to

Measurement mode, without displaying electrode information.

2) Press the ENTER key a second time to return to Measurement mode.

5.1.2 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 protect the controller from unauthorised tampering of its current setting. The

parameters cannot be changed unless the security code is entered.

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EUTECH INSTRUMENTS ALPHA PH1000 PHORP CONTROLLERTRANSMITTER Manual de instrucciones Pagina 14