Mantracourt Electronics Limited
T24 Technical Manual
33
T24-SAf [Strain Acquisition Fast]
Overview
The T24-SAf is a strain acquisition module offering high speed wireless acquisition. This allows wireless remote
viewing of strain gauge information using 2.4GHz radio.
The T24-SAf acquires the weight information from the strain gauge and transmits 10 readings per packet at a rate
of 200 packets per second giving a measurement rate of 2KHz. There are fewer functions than the T24-SA and no
operational low power mode although the device can be sent to sleep.
The values are delivered via a binary Data Provider packet and the data format is 32 bit integer factory calibrated
to nV/V (nanovolts per volt).
Communications
To configure the device you will use the Read and Write mechanisms described in the
Data Packet Structures
section to read and write parameters and execute commands.
Parameter List
Parameter
Command
Number
Description
Native
Data
Type
Read /
Write
ID
3
Read the unique identifier ID for this device. (3 bytes)
BINARY 3
bytes
R
Version
53
Read the firmware version.
FLOAT
R
Channel
11
Radio Channel
UINT8
RW
EncKey
15
The radio encryption key to operate on. Requires
power cycle or Reset to enable.
Not supported in this
release.
BINARY
16 Bytes
RW
Power
12
Set or read the output power level. (0-100%)
UINT8
RW
Name
10
Set or read a user defined name. (11 characters)
STRING
11 Bytes
RW
Model
51
Read the model number of the device.
STRING
11 Bytes
R
WakeChkInt
16
Set or read the interval in milliseconds that a sleeping
device will wake to request a full wake from the base
station. (default 3000)
UINT16
RW
UseCSMA
18
Select whether to use
Carrier Sense Multiple Access
techniques on transmission
.
Value
Description
0
Disabled
The
Carrier Sense Multiple Access
will be
disabled.
NOT RECOMMENDED
1
Enabled
The
Carrier Sense Multiple Access
will be
enabled.
See
Unslotted CSMA/CA
in
Appendix A
UINT8
RW
BattLevel
69
The voltage measured on the battery.
FLOAT
R
BattLowLevel
110
Set or read the battery voltage at which the low
battery flag will be set in all received packets and in
the Status parameter).
FLOAT
RW
SleepDelay
77
Time period before switching to low power sleep mode
if no StayAwake command or trigger received.
Setting to zero disables.
UINT16
RW
DataTag
119
Set or read the 2 byte Data Tag that is used when
transmitting the weight in a Data Provider Packet.
Note that default value is set to last 2 bytes of ID.
UINT16
RW
Value
72
Reads the calibrated weight.
FLOAT
RW
Counts
70
Raw A/D counts
INT32
R
DigitalOut
108
Read or set the digital output state.
FLOAT
R
ShuntCal
109
Read or set the shuntcal state.
UINT8
R
Status
74
Live status where the bit values indicate status. The
following table shows the decimal bit values and their
meaning.
