Section 9. input/output instructions, 1 single-ended volts, 2 differential volts – Campbell Scientific CR10X Measurement and Control System User Manual
Page 133: 3 pulse count
9-1
SECTION 9. INPUT/OUTPUT INSTRUCTIONS
TABLE 9-1. Input Voltage Ranges and Codes
Range Code
Slow
Fast
2.72ms
250µs
60 Hz
50 Hz
Integ.
Integ. Reject
Reject
Full Scale Range
Resolution*
0
10
20
30
autorange
1
11
21
31
±2.5mV
0.33 µV
2
12
22
32
±7.5mV
1.
µV
3
13
23
33
±25 mV
3.33 µV
4
14
24
34
±250 mV
33.3
µV
5
15
25
35
±
2500 mV
333.
µV
* Differential measurement; resolution for single-ended measurement is twice value shown.
NOTE: When a voltage input exceeds the range programmed, the value which is stored is set to the
maximum negative number and displayed as -99999 in high resolution or -6999 in low resolution.
*** 1 SINGLE-ENDED VOLTS ***
FUNCTION
This Instruction is used to measure voltage at a
single-ended input with respect to ground.
Output is in millivolts.
PARAM.
DATA
NUMBER
TYPE
DESCRIPTION
01:
2
Repetitions
02:
2
Range code (Table 9-1)
03:
2
Single-ended channel
number for first
measurement
04:
4
Input location number
for first measurement
05:
FP
Multiplier
06:
FP
Offset
Input locations altered: 1 per repetition
*** 2 DIFFERENTIAL VOLTS ***
FUNCTION
This Instruction reads the voltage difference
between the high and low inputs of a differential
channel. Table 9-1 contains all valid voltage
ranges and their codes. Both the high and low
inputs must be within
±
2.5 V of the CR10X's
ground (see Common Mode Range in Section
14.7.2). Pyranometer and thermopile sensors
require a jumper between LO and GROUND to
keep them in Common Mode Range. Output is
in millivolts.
PARAM.
DATA
NUMBER
TYPE
DESCRIPTION
01:
2
Repetitions
02:
2
Range code (Table 9-1)
03:
2
Differential channel
number for first
measurement
04:
4
Input location number
for first measurement
05:
FP
Multiplier
06:
FP
Offset
Input locations altered: 1 per repetition
*** 3 PULSE COUNT ***
There are three pulse input types which may be
measured with the Pulse Count Instruction. The
Pulse Count Instruction may also be used to
measure switch closures (<40 Hz ) with Control
Ports 6, 7, or 8 (see Section 8.5 for examples).