Emerson 3812 Benutzerhandbuch
60
Analog input settings
Section 3: Electrical installation
Daniel 3812 Liquid Ultrasonic Flow Meter Installation Manual
March 2013
3-9000-765 Rev D
3.6.2
Analog input settings
The 960-24™ MSTS has the capability to sample analog temperature (Analog Input 1) and
pressure (Analog Input 2) with 4-20 mA signals. These analog input signals are configured to
sink. The two independent analog input circuits are configured for conventional 4-20 mA
service. Also, 24VDC isolated power supply connection is provided for an external power source.
Refer to the Field wiring diagram (
pressure (Analog Input 2) with 4-20 mA signals. These analog input signals are configured to
sink. The two independent analog input circuits are configured for conventional 4-20 mA
service. Also, 24VDC isolated power supply connection is provided for an external power source.
Refer to the Field wiring diagram (
drawing DMC004936).
3.6.3
Analog output settings
The 960-24™ MSTS provides two 4-20 mA analog output signals that are software configurable
for either sink or source current (
for either sink or source current (
drawing DMC004936).
Full HART® functionality is provided so that any commercially available HART® transmitter
which meets the specifications of the HART® Communications Foundation can be connected to
the Daniel 3812 Liquid Ultrasonic Flow Meter.
which meets the specifications of the HART® Communications Foundation can be connected to
the Daniel 3812 Liquid Ultrasonic Flow Meter.
Analog Output 2 (AO2) is user-configurable as a conventional 4-20 mA output.
3.6.4
Digital Input
The Daniel 3812 Liquid Ultrasonic Flow Meter provides one digital input that can be used as a
general purpose input or used for synchronizing calibration (for flow calibration gating - contact
closure). The meter records the volume seen between switch closures. The polarity of the input
is configured as normal or inverted polarity.
general purpose input or used for synchronizing calibration (for flow calibration gating - contact
closure). The meter records the volume seen between switch closures. The polarity of the input
is configured as normal or inverted polarity.
•
polarity is determined by the IsDI1ForCalActiveLow and the gating edge is determined by
the IsDI1ForCalStateGated (calibrate edge gated or calibrate state gated).
the IsDI1ForCalStateGated (calibrate edge gated or calibrate state gated).
•
calibration is started and stopped via an inactive>active state change.
The digital input must be configured via the Daniel MeterLink Tools>Edit/Compare
Configuration page.
Configuration page.
3.6.5
DHCP server switch settings
The meter can be configured to act as a DHCP server. The DHCP server is enabled/disabled via
CPU Module DHCP switch as follows:
CPU Module DHCP switch as follows:
Table 3-6 DHCP server switch settings
CPU Module switch
DHCP server disabled
DHCP server enabled
DHCP
OFF
ON