3.5.26 Digital Inputs Menu
This menu is used to remotely trigger zero and span calibrations. This is done by assigning the 8
digital inputs with one of the following commands.
Disabled
No action taken
Do Span
Perform a span check
Do Zero
Perform a zero check
The input is triggered with an active low. The actual digital input pin-outs are listed in the menu.
Example
Here is an example for a typical configuration between an analyser and either a data logger or
calibrator (master device):
1. Set the jumper JP1 to 5V position (refer Section 4.4.4).
2. Connect one of the master devices digital output signal to pin 18 and the ground signal to pin 5 of
the analyser’s analog/digital 25 pin female connector (refer to Figure 11).
3. Program master device to output 0 volts to pin 18 when a span is desired.
4. In the analyser’s Digital Input Menu assign DI 0 Do Span.
5. The same procedure can be followed to also activate zero calibrations. Pin 6 of the analyser’s
analog/digital 25 pin female connector can be connected to one of the other master devices
digital outputs and the analyser can be set so DI 1 is assigned to Do Zero.
3.5.27 Digital Outputs Menu
This allows the analyser to trigger external alarms in response to certain events.
There are 8 different pins available, which will be set high during an associated event:
Disabled (never triggered)
Power Supply Failure
Ref Voltage Failure
A2D Failure
Lamp Failure
Flow Heater Failure
Lamp Heater Failure
Chassis Temp Failure
USB Disconnected
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