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LDM-1000
LVDT/RVDT Signal Conditioning Module
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.
Function:
Switch No:
1
Switch ON:
Positive
Switch OFF:
None
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.
Function:
Oscillator Frequency
Switch No:
1
Frequency
Switch Position
10 kHz
ON
5 kHz
OFF
2.5 kHz
OFF
Notes: Default factory settings are noted in
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
Function:
Oscillator Frequency
Switch No:
1
2.5kHz
OFF
For 5 KHz excitation:
Switch Set SW2
Function:
Oscillator Frequency
Switch No:
1
5kHz
OFF
For 10 KHz excitation:
Switch Set SW2
Function:
Oscillator Frequency
Switch No:
1
10 kHz
ON
TE CONNECTIVITY SENSORS
Switch Set SW1
Offset
Signal Bandwidth
2
3
Negative
1 kHz
None
250 HZ
Note: Switches 3, 4 & 5 must be
in same position
Switch Set SW2
2
Switch ON:
ON
Switch OFF:
ON
OFF
BLUE
in the above tables. Switch No. 5 of SW2 is not used. 3VRMS excitation is
2
OFF
2
ON
2
ON
/// LDM-1000 OPERATION MANUAL
Gain 2
4
5
6
1 kHz
1 kHz
LOW
250 HZ
250 HZ
HIGH
Sync
Osc. V
3
4
INT
1 VRMS
EXT
3 VRMS
Switch Set SW1
Function:
Switch No:
3
250 HZ
OFF
Switch Set SW1
Function:
Switch No:
3
250 HZ
OFF
Switch Set SW1
Function:
Switch No:
3
1 kHz
ON
P/N 09290100-000 REV. C
Gain 1
7
8
Switch position
Gain
OFF
OFF
x0.4
OFF
ON
x1.2
ON
OFF
x3.63
ON
ON
x4.43
Output Range VDC
5
6
7
8
0~5
±5
0~10
Only one switch ON
4 to 20mA output works
with any setting
Signal Bandwidth
4
5
OFF
OFF
Signal Bandwidth
4
5
OFF
OFF
Signal Bandwidth
4
5
ON
ON
05/2016
Page 6
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