1735 Technical Manual - Novatech Controls

5.3.2 Keypad in SETUP / COMMISSIONING / CALIBRATION modes
NOTE: In order to enter either COMMISSIONING or CALIBRATION modes, the corresponding DIP switch
on the 1730-1 PCB must be turned on.
From RUN mode, if the SETUP / RUN key is pressed once, the transmitter will go into the SETUP mode.
From RUN mode, if the SETUP / RUN key is pressed and held for 2 seconds, the transmitter will go into the
COMMISSIONING mode.
From RUN mode, if the SETUP / RUN key is pressed and held for 4 seconds, the transmitter will go into the
CALIBRATION mode.
The following key functions are then available in all of the above modes.
SETUP / RUN key
Pressing the SETUP / RUN key while in any of the set up modes will return the transmitter to the RUN mode.
FUNCTION up and FUNCTION down keys
These two keys allow for the selection of the setup function. A function summary table is found at the start of
the relevant SETUP, COMMISSIONING or CALIBRATION mode chapter.
OPTION up and OPTION down keys
These two keys allow for changing the option for the selected function. A list/range of options for each
function is found in the function summary table at the start of the relevant SETUP, COMMISSIONING or
CALIBRATION mode chapter.
ENTER key
The ENTER key sets the currently displayed option and stores the value in non-volatile memory to be
retrieved on device start up. If the ENTER key is not pressed when a new option is chosen, the previous
option will be retained.
Probe impedance key
When this key is pressed the transmitter will measure the impedance of oxygen sensor(s) attached to the
transmitter. If the burner is not enabled (terminals 10 & 11) or the probe temperature is below 700°C
(1292°F) impedance checking will not be performed. A ‘Z’ will be seen in the bottom left hand corner of the
display as the test is performed.
Auto calibrate key
When this key is pressed the transmitter will calibrate the analogue output channels that are set to auto
calibration (see chapter 10). This is performed by directing the output current away from the output terminals
(terminals 12&13 and 14&15) back to an analogue input to the transmitter in order to calculate a zero and
span calibration factor for each of the output channels.
During this process normal output to the analogue channels will be interrupted sending the outputs to zero
mA.
April 2012
36 1735 Water Vapour Transmitter