User Guide

HOLD MODE

This function is started by:

• calibration;

• setup;

• cleaning in place;

• the hold digital insulated input

when it is on; normally,

the signal level is polled at least every 4 seconds;

• the proper key combination ( and  keys together) for

service; the same key combination is used both to start

and to stop the hold mode (the key combination acts as

the hold digital input). To activate the hold mode in this

way, password is required;

• the daily programmable control timing (see setup items

C.41 through C.57);

• an error event (see also the “Alarm - Error Configuration”

section);

• the hold start/stop RS485 command;

• the service hold (Calibration and Setup) in the Digital Trans-

mitter.

During hold mode, control and control relays are disabled.

If the meter is in idle or control mode

and displaying measurements, the last

measured value (both for temperature

and pH/ORP) is frozen on the display;

the secondary LCD shows “HLd”;

the temperature value can be displayed on the secondary

LCD by pressing and holding the  key; when the  key is

released the “HLd” message comes back on the secondary

LCD.

If the pH or mV or temperature values

are not available because the meter

did note take any measurement be-

fore going to hold mode, then the

primary or the secondary LCD shows

dashes.

There are two digital insulated inputs: one for hold mode and one for advanced cleaning.