LDM-1000
LVDT/RVDT Signal Conditioning Module
TE CONNECTIVITY SENSORS
/// LDM-1000 OPERATION MANUAL
P/N 09290100-000 REV. C
05/2016
Page 6
4. 2. Internal Switches
There are two internal DIP switch sets (SW1 and SW2) on the PC board assembly of the LDM-1000. The tables below explain
the switch positions and functions.
Switch Set SW1
Function:
Offset
Signal Bandwidth
Gain 2
Gain 1
Switch No:
1
2
3
4
5
6
7
8
Switch ON:
Positive
Negative
1 kHz
1 kHz
1 kHz
LOW
Switch position
Gain
Switch OFF:
None
None
250 HZ
250 HZ
250 HZ
HIGH
Note: Switches 3, 4 & 5 must be
in same position
OFF
OFF
x0.4
OFF
ON
x1.2
Note: The 1 kHz bandwidth setting is not recommended for excitation frequencies other than
10 kHz, otherwise significant noise will be present on the output signal.
ON
OFF
x3.63
ON
ON
x4.43
Switch Set SW2
Function:
Oscillator Frequency
Sync
Osc. V
Output Range VDC
Switch No:
1
2
3
4
5
6
7
8
Frequency
Switch Position
Switch ON:
INT
1 VRMS
0~5
±5
0~10
10 kHz
ON
ON
Switch OFF:
EXT
3 VRMS
Only one switch ON
5 kHz
OFF
ON
4 to 20mA output works
with any setting
2.5 kHz
OFF
OFF
Notes: Default factory settings are noted in
BLUE
in the above tables. Switch No. 5 of SW2 is not used. 3VRMS excitation is
available only with the 18~30VDC supply voltage setting.
4. 3. Oscillator Frequency:
Once you have established the proper excitation frequency for your transducer, refer to the tables below to set the oscillator.
For 2.5 KHz excitation (default factory setting):
Switch Set SW2
Switch Set SW1
Function:
Oscillator Frequency
Function:
Signal Bandwidth
Switch No:
1
2
Switch No:
3
4
5
2.5kHz
OFF
OFF
250 HZ
OFF
OFF
OFF
For 5 KHz excitation:
Switch Set SW2
Switch Set SW1
Function:
Oscillator Frequency
Function:
Signal Bandwidth
Switch No:
1
2
Switch No:
3
4
5
5kHz
OFF
ON
250 HZ
OFF
OFF
OFF
For 10 KHz excitation:
Switch Set SW2
Switch Set SW1
Function:
Oscillator Frequency
Function:
Signal Bandwidth
Switch No:
1
2
Switch No:
3
4
5
10 kHz
ON
ON
1 kHz
ON
ON
ON
