Teledyne ULTRAFLOW 150, Operation Manual, Page: 62 / 162

ULTRAFLOW 150 GAS FLOW AND TEMPERATURE MONITOR
3. WITH CAL = EXP: Calibration data will be sent to that output
when a calibration request is processed. Scaling for the
SPANHIGH and SPANLOW calibration data will be the same as
the Normal mode scaling entered under VALUE AT ZERO
SCALE and VALUE AT FULL SCALE. However, scaling for
ZERO calibration data will be ±10% of the VALUE AT FULL
SCALE.
6.5.2 DIGITAL INPUTS
The Multi I/O can issue mode change commands to the Transducer
Interface Enclosure (TIE) based on the status of digital inputs one through
six. These are known as the CAL REQUEST inputs. They can initiate the
various calibration modes for each TIE. (
Both paths within a TIE follow
the same mode change request. ) By controlling which input is activated,
the operator can construct an “on-demand” calibration cycle to meet the
systems needs. There are also inputs that will initiate the automatically
timed internal CAL cycle for each TIE. See Table 6-7, Digital Inputs for
Calibration Request.
The Multi I/O analog outputs can be forced to diagnostic status (TEST
FULL SCALE, TEST ZERO SCALE, etc.) from two sources: digital
inputs seven and eight, and the Enhanced Remote Display keypad. The
operation of the digital inputs is described in Table 6-8, Digital Inputs for
Analog Output Control. The keypad display commands are described in
the section on menu structure. If the Multi I/O receives conflicting or
overlapping requests for the analog outputs, its priority handler will assign
requests from the digital inputs top priority and the keypad requests from
the Enhanced Remote Display second priority.
6.5.3 DIGITAL OUTPUTS
The Multi I/O Board’s eight digital outputs (relays) can be configured to
activate on any one of over eighty parameters. These are listed in Table 6-
9, Parameters for Relay Assignment. They fall into three categories:

Alarm indicators

Fault indicators

Output mode indicators
Standard practice is to assign a relay to each of the four CAL modes.
These signals will then indicate when and what data is present on the
analog outputs for data logging purposes. For more information on
software function see the Operational Modes of the Transducer Interface
Enclosure section (Section 4.0).
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